diff --git a/README.md b/README.md
index bcebba8..724f4b9 100644
--- a/README.md
+++ b/README.md
@@ -136,4 +136,12 @@ nix-shell -p imagemagick --run "convert frame.ppm frame.png"
python convert.py
-python.exe .\load_program.py .\programs\test.hex --port COM6
\ No newline at end of file
+python.exe .\load_program.py .\programs\test.hex --port COM6
+
+## New VGA Testing
+```
+cd generated
+verilator --cc --exe --build -j 0 ../simulation/vga-image.cpp -f filelist.f --top VGAController
+./obj_dir/VVGAController
+ffmpeg -i frame.ppm frame.png -y
+```
\ No newline at end of file
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0.v b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0.v
index 6678366..b54ee29 100644
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0.v
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0.v
@@ -54,7 +54,7 @@
// Clock Freq (MHz) (degrees) (%) Jitter (ps) Error (ps)
//----------------------------------------------------------------------------
// clk_out1__25.00000______0.000______50.0______175.402_____98.575
-// clk_out2__25.00000______0.000______50.0______175.402_____98.575
+// clk_out2__250.00000______0.000______50.0______110.209_____98.575
//
//----------------------------------------------------------------------------
// Input Clock Freq (MHz) Input Jitter (UI)
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0.veo b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0.veo
index 8e682f1..234c973 100644
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0.veo
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0.veo
@@ -53,7 +53,7 @@
// Clock Freq (MHz) (degrees) (%) Jitter (ps) Error (ps)
//----------------------------------------------------------------------------
// clk_out1__25.00000______0.000______50.0______175.402_____98.575
-// clk_out2__25.00000______0.000______50.0______175.402_____98.575
+// clk_out2__250.00000______0.000______50.0______110.209_____98.575
//
//----------------------------------------------------------------------------
// Input Clock Freq (MHz) Input Jitter (UI)
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0.xml b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0.xml
index 8ed3b55..b47c36e 100644
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0.xml
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0.xml
@@ -1314,11 +1314,11 @@
GENtimestamp
- Sun Apr 05 17:27:05 UTC 2026
+ Sun Jun 14 20:24:19 UTC 2026
outputProductCRC
- 9:ad4d551b
+ 9:86681ebc
@@ -1333,11 +1333,11 @@
GENtimestamp
- Sun Apr 05 17:27:05 UTC 2026
+ Sun Jun 14 20:24:19 UTC 2026
outputProductCRC
- 9:ad4d551b
+ 9:86681ebc
@@ -1352,11 +1352,11 @@
GENtimestamp
- Sun Apr 05 17:27:05 UTC 2026
+ Sun Jun 14 20:24:19 UTC 2026
outputProductCRC
- 9:067c9c1a
+ 9:e49d9c4c
@@ -1371,11 +1371,11 @@
GENtimestamp
- Sun Apr 05 17:27:05 UTC 2026
+ Sun Jun 14 20:24:19 UTC 2026
outputProductCRC
- 9:067c9c1a
+ 9:e49d9c4c
@@ -1386,7 +1386,7 @@
outputProductCRC
- 9:067c9c1a
+ 9:e49d9c4c
@@ -1397,7 +1397,7 @@
outputProductCRC
- 9:7443706c
+ 9:c6be101f
@@ -1411,11 +1411,11 @@
GENtimestamp
- Sun Apr 05 17:27:05 UTC 2026
+ Sun Jun 14 20:24:19 UTC 2026
outputProductCRC
- 9:4527b5ca
+ 9:7f359653
@@ -1429,11 +1429,11 @@
GENtimestamp
- Sun Apr 05 17:27:05 UTC 2026
+ Sun Jun 14 20:24:19 UTC 2026
outputProductCRC
- 9:067c9c1a
+ 9:e49d9c4c
@@ -1444,7 +1444,7 @@
outputProductCRC
- 9:067c9c1a
+ 9:e49d9c4c
@@ -1460,11 +1460,11 @@
GENtimestamp
- Sun Apr 05 17:27:05 UTC 2026
+ Sun Jun 14 20:24:18 UTC 2026
outputProductCRC
- 9:067c9c1a
+ 9:e49d9c4c
@@ -1478,11 +1478,11 @@
GENtimestamp
- Sun Apr 05 17:27:05 UTC 2026
+ Sun Jun 14 20:24:19 UTC 2026
outputProductCRC
- 9:067c9c1a
+ 9:e49d9c4c
@@ -2725,7 +2725,7 @@
C_OUTCLK_SUM_ROW2
- clk_out2__25.00000______0.000______50.0______175.402_____98.575
+ clk_out2__250.00000______0.000______50.0______110.209_____98.575
C_OUTCLK_SUM_ROW3
@@ -2753,7 +2753,7 @@
C_CLKOUT2_REQUESTED_OUT_FREQ
- 25
+ 250
C_CLKOUT3_REQUESTED_OUT_FREQ
@@ -2837,7 +2837,7 @@
C_CLKOUT2_OUT_FREQ
- 25.00000
+ 250.00000
C_CLKOUT3_OUT_FREQ
@@ -3005,7 +3005,7 @@
C_MMCM_CLKOUT1_DIVIDE
- 40
+ 4
C_MMCM_CLKOUT2_DIVIDE
@@ -3531,7 +3531,7 @@
C_DIVIDE2_AUTO
- 1.0
+ 0.1
C_DIVIDE3_AUTO
@@ -3639,7 +3639,7 @@
C_CLKOUT1_ACTUAL_FREQ
- 25.00000
+ 250.00000
C_CLKOUT2_ACTUAL_FREQ
@@ -4352,7 +4352,7 @@
CLKOUT2_REQUESTED_OUT_FREQ
- 25
+ 250
CLKOUT2_REQUESTED_PHASE
@@ -4688,7 +4688,7 @@
MMCM_CLKOUT1_DIVIDE
- 40
+ 4
MMCM_CLKOUT1_DUTY_CYCLE
@@ -4997,7 +4997,7 @@
CLKOUT2_JITTER
Clkout2 Jitter
- 175.402
+ 110.209
CLKOUT2_PHASE_ERROR
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0_clk_wiz.v b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0_clk_wiz.v
index 3bdbfa9..36879bf 100644
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0_clk_wiz.v
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0_clk_wiz.v
@@ -54,7 +54,7 @@
// Clock Freq (MHz) (degrees) (%) Jitter (ps) Error (ps)
//----------------------------------------------------------------------------
// clk_out1__25.00000______0.000______50.0______175.402_____98.575
-// clk_out2__25.00000______0.000______50.0______175.402_____98.575
+// clk_out2__250.00000______0.000______50.0______110.209_____98.575
//
//----------------------------------------------------------------------------
// Input Clock Freq (MHz) Input Jitter (UI)
@@ -134,7 +134,7 @@ wire clk_in2_clk_wiz_0;
.CLKOUT0_PHASE (0.000),
.CLKOUT0_DUTY_CYCLE (0.500),
.CLKOUT0_USE_FINE_PS ("FALSE"),
- .CLKOUT1_DIVIDE (40),
+ .CLKOUT1_DIVIDE (4),
.CLKOUT1_PHASE (0.000),
.CLKOUT1_DUTY_CYCLE (0.500),
.CLKOUT1_USE_FINE_PS ("FALSE"),
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0_sim_netlist.v b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0_sim_netlist.v
index 3dd5440..b6c1198 100644
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0_sim_netlist.v
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0_sim_netlist.v
@@ -2,7 +2,7 @@
// Copyright 2022-2025 Advanced Micro Devices, Inc. All Rights Reserved.
// --------------------------------------------------------------------------------
// Tool Version: Vivado v.2025.2 (lin64) Build 6299465 Fri Nov 14 12:34:56 MST 2025
-// Date : Sun Apr 5 13:21:14 2026
+// Date : Sun Jun 14 16:06:02 2026
// Host : arya running 64-bit EndeavourOS Linux
// Command : write_verilog -force -mode funcsim -rename_top clk_wiz_0 -prefix
// clk_wiz_0_ clk_wiz_0_sim_netlist.v
@@ -111,7 +111,7 @@ module clk_wiz_0_clk_wiz_0_clk_wiz
.CLKOUT0_DUTY_CYCLE(0.500000),
.CLKOUT0_PHASE(0.000000),
.CLKOUT0_USE_FINE_PS("FALSE"),
- .CLKOUT1_DIVIDE(40),
+ .CLKOUT1_DIVIDE(4),
.CLKOUT1_DUTY_CYCLE(0.500000),
.CLKOUT1_PHASE(0.000000),
.CLKOUT1_USE_FINE_PS("FALSE"),
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0_sim_netlist.vhdl b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0_sim_netlist.vhdl
index ac9abb0..b5b7737 100644
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0_sim_netlist.vhdl
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0_sim_netlist.vhdl
@@ -2,7 +2,7 @@
-- Copyright 2022-2025 Advanced Micro Devices, Inc. All Rights Reserved.
-- --------------------------------------------------------------------------------
-- Tool Version: Vivado v.2025.2 (lin64) Build 6299465 Fri Nov 14 12:34:56 MST 2025
--- Date : Sun Apr 5 13:21:14 2026
+-- Date : Sun Jun 14 16:06:02 2026
-- Host : arya running 64-bit EndeavourOS Linux
-- Command : write_vhdl -force -mode funcsim -rename_top clk_wiz_0 -prefix
-- clk_wiz_0_ clk_wiz_0_sim_netlist.vhdl
@@ -94,7 +94,7 @@ mmcm_adv_inst: unisim.vcomponents.MMCME2_ADV
CLKOUT0_DUTY_CYCLE => 0.500000,
CLKOUT0_PHASE => 0.000000,
CLKOUT0_USE_FINE_PS => false,
- CLKOUT1_DIVIDE => 40,
+ CLKOUT1_DIVIDE => 4,
CLKOUT1_DUTY_CYCLE => 0.500000,
CLKOUT1_PHASE => 0.000000,
CLKOUT1_USE_FINE_PS => false,
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0_stub.v b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0_stub.v
index 22daff1..6894a73 100644
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0_stub.v
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0_stub.v
@@ -2,7 +2,7 @@
// Copyright 2022-2025 Advanced Micro Devices, Inc. All Rights Reserved.
// --------------------------------------------------------------------------------
// Tool Version: Vivado v.2025.2 (lin64) Build 6299465 Fri Nov 14 12:34:56 MST 2025
-// Date : Sun Apr 5 13:21:14 2026
+// Date : Sun Jun 14 16:06:02 2026
// Host : arya running 64-bit EndeavourOS Linux
// Command : write_verilog -force -mode synth_stub -rename_top clk_wiz_0 -prefix
// clk_wiz_0_ clk_wiz_0_stub.v
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0_stub.vhdl b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0_stub.vhdl
index de31cff..ed80057 100644
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0_stub.vhdl
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.gen/sources_1/ip/clk_wiz_0/clk_wiz_0_stub.vhdl
@@ -2,7 +2,7 @@
-- Copyright 2022-2025 Advanced Micro Devices, Inc. All Rights Reserved.
-- --------------------------------------------------------------------------------
-- Tool Version: Vivado v.2025.2 (lin64) Build 6299465 Fri Nov 14 12:34:56 MST 2025
--- Date : Sun Apr 5 13:21:14 2026
+-- Date : Sun Jun 14 16:06:02 2026
-- Host : arya running 64-bit EndeavourOS Linux
-- Command : write_vhdl -force -mode synth_stub -rename_top clk_wiz_0 -prefix
-- clk_wiz_0_ clk_wiz_0_stub.vhdl
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/ip/clk_wiz_0/clk_wiz_0.veo b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/ip/clk_wiz_0/clk_wiz_0.veo
index 8e682f1..234c973 100755
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/ip/clk_wiz_0/clk_wiz_0.veo
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/ip/clk_wiz_0/clk_wiz_0.veo
@@ -53,7 +53,7 @@
// Clock Freq (MHz) (degrees) (%) Jitter (ps) Error (ps)
//----------------------------------------------------------------------------
// clk_out1__25.00000______0.000______50.0______175.402_____98.575
-// clk_out2__25.00000______0.000______50.0______175.402_____98.575
+// clk_out2__250.00000______0.000______50.0______110.209_____98.575
//
//----------------------------------------------------------------------------
// Input Clock Freq (MHz) Input Jitter (UI)
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/modelsim/README.txt b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/modelsim/README.txt
index 77b73c8..9d772f7 100644
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/modelsim/README.txt
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/modelsim/README.txt
@@ -5,7 +5,7 @@
# run the exported script and how to fetch design source file details
# from the file_info.txt file.
#
-# Generated by export_simulation on Sun Apr 05 13:27:06 EDT 2026
+# Generated by export_simulation on Sun Jun 14 16:24:19 EDT 2026
#
################################################################################
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/modelsim/clk_wiz_0.sh b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/modelsim/clk_wiz_0.sh
index 3f07532..76dd8a5 100755
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/modelsim/clk_wiz_0.sh
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/modelsim/clk_wiz_0.sh
@@ -2,7 +2,7 @@
#**********************************************************************************************************
# Vivado (TM) v2025.2 (64-bit)
#
-# Script generated by Vivado on Sun Apr 05 13:27:06 EDT 2026
+# Script generated by Vivado on Sun Jun 14 16:24:19 EDT 2026
# SW Build 6299465 on Fri Nov 14 12:34:56 MST 2025
#
# Copyright 1986-2022 Xilinx, Inc. All Rights Reserved.
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/questa/README.txt b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/questa/README.txt
index 77b73c8..9d772f7 100644
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/questa/README.txt
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/questa/README.txt
@@ -5,7 +5,7 @@
# run the exported script and how to fetch design source file details
# from the file_info.txt file.
#
-# Generated by export_simulation on Sun Apr 05 13:27:06 EDT 2026
+# Generated by export_simulation on Sun Jun 14 16:24:19 EDT 2026
#
################################################################################
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/questa/clk_wiz_0.sh b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/questa/clk_wiz_0.sh
index 3663c88..b1d159e 100755
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/questa/clk_wiz_0.sh
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/questa/clk_wiz_0.sh
@@ -2,7 +2,7 @@
#**********************************************************************************************************
# Vivado (TM) v2025.2 (64-bit)
#
-# Script generated by Vivado on Sun Apr 05 13:27:06 EDT 2026
+# Script generated by Vivado on Sun Jun 14 16:24:19 EDT 2026
# SW Build 6299465 on Fri Nov 14 12:34:56 MST 2025
#
# Copyright 1986-2022 Xilinx, Inc. All Rights Reserved.
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/riviera/README.txt b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/riviera/README.txt
index 77b73c8..9d772f7 100644
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/riviera/README.txt
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/riviera/README.txt
@@ -5,7 +5,7 @@
# run the exported script and how to fetch design source file details
# from the file_info.txt file.
#
-# Generated by export_simulation on Sun Apr 05 13:27:06 EDT 2026
+# Generated by export_simulation on Sun Jun 14 16:24:19 EDT 2026
#
################################################################################
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/riviera/clk_wiz_0.sh b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/riviera/clk_wiz_0.sh
index fe45b67..e824464 100755
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/riviera/clk_wiz_0.sh
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/riviera/clk_wiz_0.sh
@@ -2,7 +2,7 @@
#**********************************************************************************************************
# Vivado (TM) v2025.2 (64-bit)
#
-# Script generated by Vivado on Sun Apr 05 13:27:06 EDT 2026
+# Script generated by Vivado on Sun Jun 14 16:24:19 EDT 2026
# SW Build 6299465 on Fri Nov 14 12:34:56 MST 2025
#
# Copyright 1986-2022 Xilinx, Inc. All Rights Reserved.
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/vcs/README.txt b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/vcs/README.txt
index 77b73c8..9d772f7 100644
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/vcs/README.txt
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/vcs/README.txt
@@ -5,7 +5,7 @@
# run the exported script and how to fetch design source file details
# from the file_info.txt file.
#
-# Generated by export_simulation on Sun Apr 05 13:27:06 EDT 2026
+# Generated by export_simulation on Sun Jun 14 16:24:19 EDT 2026
#
################################################################################
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/vcs/clk_wiz_0.sh b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/vcs/clk_wiz_0.sh
index 2de1372..e6ec085 100755
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/vcs/clk_wiz_0.sh
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/vcs/clk_wiz_0.sh
@@ -2,7 +2,7 @@
#**********************************************************************************************************
# Vivado (TM) v2025.2 (64-bit)
#
-# Script generated by Vivado on Sun Apr 05 13:27:06 EDT 2026
+# Script generated by Vivado on Sun Jun 14 16:24:19 EDT 2026
# SW Build 6299465 on Fri Nov 14 12:34:56 MST 2025
#
# Copyright 1986-2022 Xilinx, Inc. All Rights Reserved.
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/xcelium/README.txt b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/xcelium/README.txt
index 77b73c8..9d772f7 100644
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/xcelium/README.txt
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/xcelium/README.txt
@@ -5,7 +5,7 @@
# run the exported script and how to fetch design source file details
# from the file_info.txt file.
#
-# Generated by export_simulation on Sun Apr 05 13:27:06 EDT 2026
+# Generated by export_simulation on Sun Jun 14 16:24:19 EDT 2026
#
################################################################################
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/xcelium/clk_wiz_0.sh b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/xcelium/clk_wiz_0.sh
index 206ce22..e254abe 100755
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/xcelium/clk_wiz_0.sh
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/xcelium/clk_wiz_0.sh
@@ -2,7 +2,7 @@
#**********************************************************************************************************
# Vivado (TM) v2025.2 (64-bit)
#
-# Script generated by Vivado on Sun Apr 05 13:27:06 EDT 2026
+# Script generated by Vivado on Sun Jun 14 16:24:19 EDT 2026
# SW Build 6299465 on Fri Nov 14 12:34:56 MST 2025
#
# Copyright 1986-2022 Xilinx, Inc. All Rights Reserved.
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/xsim/README.txt b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/xsim/README.txt
index 77b73c8..9d772f7 100644
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/xsim/README.txt
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/xsim/README.txt
@@ -5,7 +5,7 @@
# run the exported script and how to fetch design source file details
# from the file_info.txt file.
#
-# Generated by export_simulation on Sun Apr 05 13:27:06 EDT 2026
+# Generated by export_simulation on Sun Jun 14 16:24:19 EDT 2026
#
################################################################################
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/xsim/clk_wiz_0.sh b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/xsim/clk_wiz_0.sh
index 3d4a5d5..c53a5fc 100755
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/xsim/clk_wiz_0.sh
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.ip_user_files/sim_scripts/clk_wiz_0/xsim/clk_wiz_0.sh
@@ -2,7 +2,7 @@
#**********************************************************************************************************
# Vivado (TM) v2025.2 (64-bit)
#
-# Script generated by Vivado on Sun Apr 05 13:27:06 EDT 2026
+# Script generated by Vivado on Sun Jun 14 16:24:19 EDT 2026
# SW Build 6299465 on Fri Nov 14 12:34:56 MST 2025
#
# Copyright 1986-2022 Xilinx, Inc. All Rights Reserved.
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.srcs/sources_1/ip/clk_wiz_0/clk_wiz_0.xci b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.srcs/sources_1/ip/clk_wiz_0/clk_wiz_0.xci
index f9777fc..547d006 100644
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.srcs/sources_1/ip/clk_wiz_0/clk_wiz_0.xci
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.srcs/sources_1/ip/clk_wiz_0/clk_wiz_0.xci
@@ -87,7 +87,7 @@
"CLKOUT1_REQUESTED_OUT_FREQ": [ { "value": "25", "value_src": "user", "resolve_type": "user", "format": "float", "usage": "all" } ],
"CLKOUT1_REQUESTED_PHASE": [ { "value": "0.000", "resolve_type": "user", "format": "float", "usage": "all" } ],
"CLKOUT1_REQUESTED_DUTY_CYCLE": [ { "value": "50.000", "resolve_type": "user", "format": "float", "usage": "all" } ],
- "CLKOUT2_REQUESTED_OUT_FREQ": [ { "value": "25", "value_src": "user", "resolve_type": "user", "format": "float", "usage": "all" } ],
+ "CLKOUT2_REQUESTED_OUT_FREQ": [ { "value": "250", "value_src": "user", "resolve_type": "user", "format": "float", "usage": "all" } ],
"CLKOUT2_REQUESTED_PHASE": [ { "value": "0.000", "resolve_type": "user", "format": "float", "usage": "all" } ],
"CLKOUT2_REQUESTED_DUTY_CYCLE": [ { "value": "50.000", "resolve_type": "user", "format": "float", "usage": "all" } ],
"CLKOUT3_REQUESTED_OUT_FREQ": [ { "value": "100.000", "resolve_type": "user", "format": "float", "usage": "all" } ],
@@ -171,7 +171,7 @@
"MMCM_CLKOUT0_DUTY_CYCLE": [ { "value": "0.500", "resolve_type": "user", "format": "float", "usage": "all" } ],
"MMCM_CLKOUT0_PHASE": [ { "value": "0.000", "resolve_type": "user", "format": "float", "usage": "all" } ],
"MMCM_CLKOUT0_USE_FINE_PS": [ { "value": "false", "resolve_type": "user", "format": "bool", "usage": "all" } ],
- "MMCM_CLKOUT1_DIVIDE": [ { "value": "40", "value_src": "user", "resolve_type": "user", "format": "long", "usage": "all" } ],
+ "MMCM_CLKOUT1_DIVIDE": [ { "value": "4", "value_src": "user", "resolve_type": "user", "format": "long", "usage": "all" } ],
"MMCM_CLKOUT1_DUTY_CYCLE": [ { "value": "0.500", "resolve_type": "user", "format": "float", "usage": "all" } ],
"MMCM_CLKOUT1_PHASE": [ { "value": "0.000", "resolve_type": "user", "format": "float", "usage": "all" } ],
"MMCM_CLKOUT1_USE_FINE_PS": [ { "value": "false", "resolve_type": "user", "format": "bool", "usage": "all" } ],
@@ -247,7 +247,7 @@
"CLKOUTPHY_REQUESTED_FREQ": [ { "value": "600.000", "resolve_type": "user", "format": "float", "usage": "all" } ],
"CLKOUT1_JITTER": [ { "value": "175.402", "value_src": "user", "resolve_type": "user", "format": "float", "usage": "all" } ],
"CLKOUT1_PHASE_ERROR": [ { "value": "98.575", "value_src": "user", "resolve_type": "user", "format": "float", "usage": "all" } ],
- "CLKOUT2_JITTER": [ { "value": "175.402", "value_src": "user", "resolve_type": "user", "format": "float", "usage": "all" } ],
+ "CLKOUT2_JITTER": [ { "value": "110.209", "value_src": "user", "resolve_type": "user", "format": "float", "usage": "all" } ],
"CLKOUT2_PHASE_ERROR": [ { "value": "98.575", "value_src": "user", "resolve_type": "user", "format": "float", "usage": "all" } ],
"CLKOUT3_JITTER": [ { "value": "0.0", "resolve_type": "user", "format": "float", "usage": "all" } ],
"CLKOUT3_PHASE_ERROR": [ { "value": "0.0", "resolve_type": "user", "format": "float", "usage": "all" } ],
@@ -339,14 +339,14 @@
"C_OUTCLK_SUM_ROW0A": [ { "value": " Output Output Phase Duty Cycle Pk-to-Pk Phase", "resolve_type": "generated", "usage": "all" } ],
"C_OUTCLK_SUM_ROW0B": [ { "value": " Clock Freq (MHz) (degrees) (%) Jitter (ps) Error (ps)", "resolve_type": "generated", "usage": "all" } ],
"C_OUTCLK_SUM_ROW1": [ { "value": "clk_out1__25.00000______0.000______50.0______175.402_____98.575", "resolve_type": "generated", "usage": "all" } ],
- "C_OUTCLK_SUM_ROW2": [ { "value": "clk_out2__25.00000______0.000______50.0______175.402_____98.575", "resolve_type": "generated", "usage": "all" } ],
+ "C_OUTCLK_SUM_ROW2": [ { "value": "clk_out2__250.00000______0.000______50.0______110.209_____98.575", "resolve_type": "generated", "usage": "all" } ],
"C_OUTCLK_SUM_ROW3": [ { "value": "no_CLK_OUT3_output", "resolve_type": "generated", "usage": "all" } ],
"C_OUTCLK_SUM_ROW4": [ { "value": "no_CLK_OUT4_output", "resolve_type": "generated", "usage": "all" } ],
"C_OUTCLK_SUM_ROW5": [ { "value": "no_CLK_OUT5_output", "resolve_type": "generated", "usage": "all" } ],
"C_OUTCLK_SUM_ROW6": [ { "value": "no_CLK_OUT6_output", "resolve_type": "generated", "usage": "all" } ],
"C_OUTCLK_SUM_ROW7": [ { "value": "no_CLK_OUT7_output", "resolve_type": "generated", "usage": "all" } ],
"C_CLKOUT1_REQUESTED_OUT_FREQ": [ { "value": "25", "resolve_type": "generated", "format": "float", "usage": "all" } ],
- "C_CLKOUT2_REQUESTED_OUT_FREQ": [ { "value": "25", "resolve_type": "generated", "format": "float", "usage": "all" } ],
+ "C_CLKOUT2_REQUESTED_OUT_FREQ": [ { "value": "250", "resolve_type": "generated", "format": "float", "usage": "all" } ],
"C_CLKOUT3_REQUESTED_OUT_FREQ": [ { "value": "100.000", "resolve_type": "generated", "format": "float", "usage": "all" } ],
"C_CLKOUT4_REQUESTED_OUT_FREQ": [ { "value": "100.000", "resolve_type": "generated", "format": "float", "usage": "all" } ],
"C_CLKOUT5_REQUESTED_OUT_FREQ": [ { "value": "100.000", "resolve_type": "generated", "format": "float", "usage": "all" } ],
@@ -367,7 +367,7 @@
"C_CLKOUT6_REQUESTED_DUTY_CYCLE": [ { "value": "50.000", "resolve_type": "generated", "format": "float", "usage": "all" } ],
"C_CLKOUT7_REQUESTED_DUTY_CYCLE": [ { "value": "50.000", "resolve_type": "generated", "format": "float", "usage": "all" } ],
"C_CLKOUT1_OUT_FREQ": [ { "value": "25.00000", "resolve_type": "generated", "format": "float", "usage": "all" } ],
- "C_CLKOUT2_OUT_FREQ": [ { "value": "25.00000", "resolve_type": "generated", "format": "float", "usage": "all" } ],
+ "C_CLKOUT2_OUT_FREQ": [ { "value": "250.00000", "resolve_type": "generated", "format": "float", "usage": "all" } ],
"C_CLKOUT3_OUT_FREQ": [ { "value": "100.000", "resolve_type": "generated", "format": "float", "usage": "all" } ],
"C_CLKOUT4_OUT_FREQ": [ { "value": "100.000", "resolve_type": "generated", "format": "float", "usage": "all" } ],
"C_CLKOUT5_OUT_FREQ": [ { "value": "100.000", "resolve_type": "generated", "format": "float", "usage": "all" } ],
@@ -409,7 +409,7 @@
"C_MMCM_REF_JITTER2": [ { "value": "0.010", "resolve_type": "generated", "format": "float", "usage": "all" } ],
"C_MMCM_STARTUP_WAIT": [ { "value": "FALSE", "resolve_type": "generated", "usage": "all" } ],
"C_MMCM_CLKOUT0_DIVIDE_F": [ { "value": "40.000", "resolve_type": "generated", "format": "float", "usage": "all" } ],
- "C_MMCM_CLKOUT1_DIVIDE": [ { "value": "40", "resolve_type": "generated", "format": "long", "usage": "all" } ],
+ "C_MMCM_CLKOUT1_DIVIDE": [ { "value": "4", "resolve_type": "generated", "format": "long", "usage": "all" } ],
"C_MMCM_CLKOUT2_DIVIDE": [ { "value": "1", "resolve_type": "generated", "format": "long", "usage": "all" } ],
"C_MMCM_CLKOUT3_DIVIDE": [ { "value": "1", "resolve_type": "generated", "format": "long", "usage": "all" } ],
"C_MMCM_CLKOUT4_DIVIDE": [ { "value": "1", "resolve_type": "generated", "format": "long", "usage": "all" } ],
@@ -540,7 +540,7 @@
"C_FILTER_1": [ { "value": "0000", "resolve_type": "generated", "usage": "all" } ],
"C_FILTER_2": [ { "value": "0000", "resolve_type": "generated", "usage": "all" } ],
"C_DIVIDE1_AUTO": [ { "value": "1", "resolve_type": "generated", "usage": "all" } ],
- "C_DIVIDE2_AUTO": [ { "value": "1.0", "resolve_type": "generated", "usage": "all" } ],
+ "C_DIVIDE2_AUTO": [ { "value": "0.1", "resolve_type": "generated", "usage": "all" } ],
"C_DIVIDE3_AUTO": [ { "value": "0.025", "resolve_type": "generated", "usage": "all" } ],
"C_DIVIDE4_AUTO": [ { "value": "0.025", "resolve_type": "generated", "usage": "all" } ],
"C_DIVIDE5_AUTO": [ { "value": "0.025", "resolve_type": "generated", "usage": "all" } ],
@@ -567,7 +567,7 @@
"C_CLKOUT6_MATCHED_ROUTING": [ { "value": "false", "resolve_type": "generated", "usage": "all" } ],
"C_CLKOUT7_MATCHED_ROUTING": [ { "value": "false", "resolve_type": "generated", "usage": "all" } ],
"C_CLKOUT0_ACTUAL_FREQ": [ { "value": "25.00000", "resolve_type": "generated", "usage": "all" } ],
- "C_CLKOUT1_ACTUAL_FREQ": [ { "value": "25.00000", "resolve_type": "generated", "usage": "all" } ],
+ "C_CLKOUT1_ACTUAL_FREQ": [ { "value": "250.00000", "resolve_type": "generated", "usage": "all" } ],
"C_CLKOUT2_ACTUAL_FREQ": [ { "value": "100.000", "resolve_type": "generated", "usage": "all" } ],
"C_CLKOUT3_ACTUAL_FREQ": [ { "value": "100.000", "resolve_type": "generated", "usage": "all" } ],
"C_CLKOUT4_ACTUAL_FREQ": [ { "value": "100.000", "resolve_type": "generated", "usage": "all" } ],
@@ -686,5 +686,5 @@
}
}
},
- "checksum": "eb66e59e"
+ "checksum": "3bd70495"
}
\ No newline at end of file
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.srcs/sources_1/new/top.v b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.srcs/sources_1/new/top.v
index 58bc133..038a7f2 100644
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.srcs/sources_1/new/top.v
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.srcs/sources_1/new/top.v
@@ -70,18 +70,18 @@ module Top(
.clock (cpu_clk),
.reset (reset),
.io_execute (execute),
- .io_debug_write (debug_write),
- .io_debug_write_address (debug_write_address),
- .io_debug_write_data (debug_write_data),
- .io_debug_1 (debug_1),
- .io_debug_2 (debug_2),
+ .io_flash (debug_write),
+ .io_flash_address (debug_write_address),
+ .io_flash_value (debug_write_data),
+// .io_debug_1 (debug_1),
+// .io_debug_2 (debug_2),
.io_hsync (vgaHSync),
.io_vsync (vgaVSync),
.io_rgb (rgb),
.io_blanking (blanking),
- .io_vga_clk (clk_25),
- .io_btns(btns)
-
+ .io_vga_clk (clk_25),
+ .io_btns (btns)
+// .io_tx (RsTx)
);
assign vgaRed = blanking ? 4'h0 : rgb[11:8];
diff --git a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.xpr b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.xpr
index b6531a3..489b328 100644
--- a/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.xpr
+++ b/RISC-V-Scaffold-Basys3/RISC-V-Scaffold-Basys3.xpr
@@ -66,12 +66,12 @@
-
-
-
+
+
+
-
-
+
+
@@ -98,6 +98,54 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
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+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
@@ -106,7 +154,15 @@
-
+
+
+
+
+
+
+
+
+
@@ -114,6 +170,38 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
@@ -135,7 +223,14 @@
-
+
+
+
+
+
+
+
+
@@ -149,6 +244,27 @@
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
+
@@ -163,6 +279,13 @@
+
+
+
+
+
+
+
@@ -177,7 +300,14 @@
-
+
+
+
+
+
+
+
+
diff --git a/build.sh b/build.sh
new file mode 100755
index 0000000..23c38da
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,28 @@
+#!/bin/bash
+if [ -z "$1" ]; then
+echo "Usage: $0 "
+exit 1
+fi
+SRC="$1"
+BASENAME="${SRC%.*}"
+GCC="./xpack-riscv-none-elf-gcc-15.2.0-1/bin/riscv-none-elf-gcc"
+OBJ="/tmp/build_out.o"
+ELF="/tmp/build_out.elf"
+BIN="/tmp/build_out.bin"
+HEX="/tmp/build_out.hex"
+echo "Compiling $SRC..."
+$GCC -c -O1 -march=rv32i -mabi=ilp32 "$SRC" -o "$OBJ" || exit 1
+echo "Linking..."
+$GCC -march=rv32i -mabi=ilp32 -nostdlib \
+-Wl,--section-start=.text=0x0,--entry=_start \
+-o "$ELF" "$OBJ" -lgcc || exit 1
+echo "Converting to binary..."
+./xpack-riscv-none-elf-gcc-15.2.0-1/bin/riscv-none-elf-objcopy \
+-O binary "$ELF" "$BIN" || exit 1
+echo "Converting to hex..."
+python convert.py "$BIN" "$HEX" || exit 1
+echo "Loading program..."
+python load_program.py "$HEX" --port /dev/ttyUSB3
+echo "Cleaning up..."
+rm -f "$OBJ" "$ELF" "$BIN" #"$HEX"
+echo "Done."
\ No newline at end of file
diff --git a/compile.bat b/compile.bat
index de475b5..c077432 100644
--- a/compile.bat
+++ b/compile.bat
@@ -4,6 +4,4 @@
.\xpack-riscv-none-elf-gcc-15.2.0-1\bin\riscv-none-elf-objcopy.exe -O binary ./programs/hello.elf ./programs/hello.bin
-python convert.py
-
-python.exe .\load_program.py .\programs\hello.hex --port COM6
\ No newline at end of file
+python convert.py
\ No newline at end of file
diff --git a/compile.sh b/compile.sh
new file mode 100755
index 0000000..6f6b50d
--- /dev/null
+++ b/compile.sh
@@ -0,0 +1,11 @@
+./xpack-riscv-none-elf-gcc-15.2.0-1/bin/riscv-none-elf-gcc -c -O0 -march=rv32i -mabi=ilp32 ./programs/hello.c -o ./programs/hello.o
+
+./xpack-riscv-none-elf-gcc-15.2.0-1/bin/riscv-none-elf-gcc -march=rv32i -mabi=ilp32 -nostdlib "-Wl,--section-start=.text=0x0,--entry=_start" -o ./programs/hello.elf ./programs/hello.o
+
+./xpack-riscv-none-elf-gcc-15.2.0-1/bin/riscv-none-elf-objcopy -O binary ./programs/hello.elf ./programs/hello.bin
+
+python convert.py ./programs/hello.bin ./programs/hello.hex || exit 1
+
+rm ./programs/hello.bin
+rm ./programs/hello.elf
+rm ./programs/hello.o
\ No newline at end of file
diff --git a/convert.py b/convert.py
index 1d1acc4..65fad22 100644
--- a/convert.py
+++ b/convert.py
@@ -1,7 +1,11 @@
-with open("./programs/mandelbrot.bin", "rb") as f:
+import sys
+
+with open(sys.argv[1], "rb") as f:
data = f.read()
-with open("./programs/mandelbrot.hex", "w") as f:
+output = sys.argv[1].rsplit(".", 1)[0] + ".hex"
+
+with open(output, "w") as f:
for i in range(0, len(data), 4):
word = data[i:i+4]
val = int.from_bytes(word, "little")
diff --git a/disabled-tests/CoreSpec.scala b/disabled-tests/CoreSpec.scala
new file mode 100644
index 0000000..04c9f52
--- /dev/null
+++ b/disabled-tests/CoreSpec.scala
@@ -0,0 +1,61 @@
+package RISCV
+
+import chisel3._
+import chisel3.simulator.scalatest.ChiselSim
+import org.scalatest.freespec.AnyFreeSpec
+import org.scalatest.matchers.must.Matchers
+import scala.io.Source
+import java.nio.file.{Files, Paths}
+import java.nio.ByteBuffer
+import chisel3.simulator.PeekPokeAPI.TestableRecord
+import scala.io.Source
+
+class CoreSpec extends AnyFreeSpec with Matchers with ChiselSim {
+ // "Core should execute program.hex correctly" in {
+ // simulate(new Core()) { dut =>
+ // val path = getClass.getResource("/program.hex").getPath
+ // val lines = Source.fromFile(path).getLines().toList
+
+ // dut.io.flash.poke(true.B)
+
+ // lines.zipWithIndex.foreach { case (line, index) =>
+ // val value = java.lang.Long.parseLong(line.trim, 16)
+
+ // dut.io.flash_address.poke((index * 4).U)
+ // dut.io.flash_value.poke(value.U)
+
+ // dut.clock.step(1)
+ // }
+
+ // dut.io.flash.poke(false.B)
+
+ // dut.io.execute.poke(true.B)
+
+ // dut.clock.step(16)
+ // }
+ // }
+
+ "Core should execute memory.hex correctly" in {
+ simulate(new Core()) { dut =>
+ val path = getClass.getResource("/memory.hex").getPath
+ val lines = Source.fromFile(path).getLines().toList
+
+ dut.io.flash.poke(true.B)
+
+ lines.zipWithIndex.foreach { case (line, index) =>
+ val value = java.lang.Long.parseLong(line.trim, 16)
+
+ dut.io.flash_address.poke((index * 4).U)
+ dut.io.flash_value.poke(value.U)
+
+ dut.clock.step(1)
+ }
+
+ dut.io.flash.poke(false.B)
+
+ dut.io.execute.poke(true.B)
+
+ dut.clock.step(16)
+ }
+ }
+}
diff --git a/disabled-tests/DecodeStageSpec.scala b/disabled-tests/DecodeStageSpec.scala
new file mode 100644
index 0000000..7f91664
--- /dev/null
+++ b/disabled-tests/DecodeStageSpec.scala
@@ -0,0 +1,58 @@
+package RISCV
+
+import chisel3._
+import chisel3.simulator.scalatest.ChiselSim
+import org.scalatest.freespec.AnyFreeSpec
+import org.scalatest.matchers.must.Matchers
+import scala.io.Source
+import java.nio.file.{Files, Paths}
+import java.nio.ByteBuffer
+import chisel3.simulator.PeekPokeAPI.TestableRecord
+import scala.io.Source
+
+class DecodeStageSpec extends AnyFreeSpec with Matchers with ChiselSim {
+ "Decode stage valid and decode" in {
+ simulate(new DecodeStage()) { dut =>
+ // Data not valid yet
+ dut.io.instruction.poke(0.U)
+ dut.io.valid.poke(false.B)
+ dut.io.flush.poke(false.B)
+
+ dut.io.next_valid.expect(false.B)
+
+ dut.clock.step(1)
+
+ // Now valid input but output not valid yet
+ dut.io.instruction.poke(0x06400093L.U) // addi x1, x0, 100
+ dut.io.valid.poke(true.B)
+
+ dut.io.next_valid.expect(false.B)
+
+ dut.clock.step(1)
+
+ // Now decode is valid
+ dut.io.instruction.poke(0.U)
+ dut.io.valid.poke(false.B)
+
+ dut.io.decoded.rd.expect(1.U)
+ dut.io.decoded.rs1.expect(0.U)
+ dut.io.decoded.immediate.expect(100.U)
+ dut.io.decoded.opcode.expect(0b0010011L.U)
+ dut.io.next_valid.expect(true.B)
+ }
+ }
+
+ "Decode stage flush" in {
+ simulate(new DecodeStage()) { dut =>
+ // Request Flush
+ dut.io.instruction.poke(0x06400093L.U) // addi x1, x0, 100
+ dut.io.valid.poke(true.B)
+ dut.io.flush.poke(true.B)
+
+ dut.clock.step(1)
+
+ // Value is no longer valid
+ dut.io.next_valid.expect(false.B)
+ }
+ }
+}
diff --git a/disabled-tests/FetchStageSpec.scala b/disabled-tests/FetchStageSpec.scala
new file mode 100644
index 0000000..4466a2a
--- /dev/null
+++ b/disabled-tests/FetchStageSpec.scala
@@ -0,0 +1,65 @@
+package RISCV
+
+import chisel3._
+import chisel3.simulator.scalatest.ChiselSim
+import org.scalatest.freespec.AnyFreeSpec
+import org.scalatest.matchers.must.Matchers
+import scala.io.Source
+import java.nio.file.{Files, Paths}
+import java.nio.ByteBuffer
+import chisel3.simulator.PeekPokeAPI.TestableRecord
+import scala.io.Source
+
+class FetchStageSpec extends AnyFreeSpec with Matchers with ChiselSim {
+ "Fetch stage valid and fetch" in {
+ simulate(new FetchStage()) { dut =>
+ // Execute is not set yet, so the data should not be valid
+ dut.io.execute.poke(false.B)
+ dut.io.program_pointer.poke(0.U)
+ dut.io.memory_read_value.poke(0.U)
+ dut.io.flush.poke(false.B)
+
+ dut.io.memory_read_address.expect(0.U)
+ dut.io.instruction.expect(0.U)
+ dut.io.next_valid.expect(false.B)
+
+ dut.clock.step(1)
+
+ // Now we trigger execute and pass in a data value
+ dut.io.execute.poke(true.B)
+ dut.io.memory_read_value.poke(1.U)
+
+ dut.io.memory_read_address.expect(0.U)
+ dut.io.instruction.expect(1.U)
+ dut.io.next_valid.expect(false.B)
+
+ dut.clock.step(1)
+
+ // Now value should be valid
+ dut.io.memory_read_address.expect(0.U)
+ dut.io.instruction.expect(1.U)
+ dut.io.next_valid.expect(true.B)
+ }
+ }
+
+ "Fetch stage flush" in {
+ simulate(new FetchStage()) { dut =>
+ // Request flush
+ dut.io.execute.poke(true.B)
+ dut.io.program_pointer.poke(0.U)
+ dut.io.memory_read_value.poke(0.U)
+ dut.io.flush.poke(true.B)
+
+ dut.io.memory_read_address.expect(0.U)
+ dut.io.instruction.expect(0.U)
+ dut.io.next_valid.expect(false.B)
+
+ dut.clock.step(1)
+
+ // No longer valid
+ dut.io.next_valid.expect(false.B)
+
+ dut.clock.step(1)
+ }
+ }
+}
diff --git a/disabled-tests/MainSpec.scala b/disabled-tests/MainSpec.scala
new file mode 100644
index 0000000..25c9932
--- /dev/null
+++ b/disabled-tests/MainSpec.scala
@@ -0,0 +1,86 @@
+package RISCV
+
+import chisel3._
+import chisel3.simulator.scalatest.ChiselSim
+import org.scalatest.freespec.AnyFreeSpec
+import org.scalatest.matchers.must.Matchers
+import scala.io.Source
+import java.nio.file.{Files, Paths}
+import java.nio.ByteBuffer
+import chisel3.simulator.PeekPokeAPI.TestableRecord
+
+class MainSpec extends AnyFreeSpec with Matchers with ChiselSim {
+ "Main should execute Store and Load Instructions correctly" in {
+ simulate(new Main()) { dut =>
+ // Load hex file, one instruction per line
+ val instructions = Source
+ .fromFile("./programs/hello.hex")
+ .getLines()
+ .filter(_.trim.nonEmpty)
+ .map(line => java.lang.Long.parseLong(line.trim, 16))
+ .toSeq
+
+ dut.io.debug_write.poke(true.B)
+
+ instructions.zipWithIndex.foreach { case (instr, idx) =>
+ dut.io.debug_write_address.poke(idx.U)
+ dut.io.debug_write_data.poke(instr.U(32.W))
+ dut.clock.step(1)
+ }
+
+ dut.io.debug_write.poke(false.B)
+ dut.clock.step(1)
+
+ dut.io.execute.poke(true.B)
+ dut.clock.step(64)
+ }
+ }
+
+ // "Main should execute Store and Load Instructions correctly" in {
+ // simulate(new Main()) { dut =>
+ // dut.io.debug_write.poke(true.B)
+
+ // dut.io.debug_write_address.poke(0.U)
+ // dut.io.debug_write_data.poke(0x00004137L.U)
+ // dut.clock.step(1)
+
+ // dut.io.debug_write_address.poke(1.U)
+ // dut.io.debug_write_data.poke(0x000041b7L.U)
+ // dut.clock.step(1)
+
+ // dut.io.debug_write_address.poke(2.U)
+ // dut.io.debug_write_data.poke(0x00408093L.U)
+ // dut.clock.step(1)
+
+ // dut.io.debug_write_address.poke(3.U)
+ // dut.io.debug_write_data.poke(0x00218133L.U)
+ // dut.clock.step(1)
+
+ // dut.io.debug_write_address.poke(4.U)
+ // dut.io.debug_write_data.poke(0x00110023L.U)
+ // dut.clock.step(1)
+
+ // dut.io.debug_write_address.poke(5.U)
+ // dut.io.debug_write_data.poke(0xff5ff06fL.U)
+ // dut.clock.step(1)
+
+ // // dut.io.debug_write_address.poke(0.U)
+ // // dut.io.debug_write_data.poke(0b000000000111_00000_000_00001_0010011.U) // ADDI
+ // // dut.clock.step(1)
+
+ // // dut.io.debug_write_address.poke(1.U)
+ // // dut.io.debug_write_data.poke(0b0000000_00001_00000_010_00000_0100011.U) // SW
+ // // dut.clock.step(1)
+
+ // // dut.io.debug_write_address.poke(2.U)
+ // // dut.io.debug_write_data.poke(0b000000000000_00000_010_00010_0000011.U) // LW
+ // // dut.clock.step(1)
+
+ // dut.io.debug_write.poke(false.B)
+ // dut.clock.step(1)
+
+ // dut.io.execute.poke(true.B)
+ // dut.clock.step(24)
+ // }
+ // }
+}
diff --git a/mill b/mill
deleted file mode 100755
index 8eda811..0000000
--- a/mill
+++ /dev/null
@@ -1,241 +0,0 @@
-#!/usr/bin/env sh
-
-# This is a wrapper script, that automatically download mill from GitHub release pages
-# You can give the required mill version with --mill-version parameter
-# If no version is given, it falls back to the value of DEFAULT_MILL_VERSION
-#
-# Original Project page: https://github.com/lefou/millw
-# Script Version: 0.4.12
-#
-# If you want to improve this script, please also contribute your changes back!
-#
-# Licensed under the Apache License, Version 2.0
-
-set -e
-
-if [ -z "${DEFAULT_MILL_VERSION}" ] ; then
- DEFAULT_MILL_VERSION=0.12.5
-fi
-
-
-if [ -z "${GITHUB_RELEASE_CDN}" ] ; then
- GITHUB_RELEASE_CDN=""
-fi
-
-
-MILL_REPO_URL="https://github.com/com-lihaoyi/mill"
-
-if [ -z "${CURL_CMD}" ] ; then
- CURL_CMD=curl
-fi
-
-# Explicit commandline argument takes precedence over all other methods
-if [ "$1" = "--mill-version" ] ; then
- shift
- if [ "x$1" != "x" ] ; then
- MILL_VERSION="$1"
- shift
- else
- echo "You specified --mill-version without a version." 1>&2
- echo "Please provide a version that matches one provided on" 1>&2
- echo "${MILL_REPO_URL}/releases" 1>&2
- false
- fi
-fi
-
-# Please note, that if a MILL_VERSION is already set in the environment,
-# We reuse it's value and skip searching for a value.
-
-# If not already set, read .mill-version file
-if [ -z "${MILL_VERSION}" ] ; then
- if [ -f ".mill-version" ] ; then
- MILL_VERSION="$(tr '\r' '\n' < .mill-version | head -n 1 2> /dev/null)"
- elif [ -f ".config/mill-version" ] ; then
- MILL_VERSION="$(tr '\r' '\n' < .config/mill-version | head -n 1 2> /dev/null)"
- fi
-fi
-
-MILL_USER_CACHE_DIR="${XDG_CACHE_HOME:-${HOME}/.cache}/mill"
-
-if [ -z "${MILL_DOWNLOAD_PATH}" ] ; then
- MILL_DOWNLOAD_PATH="${MILL_USER_CACHE_DIR}/download"
-fi
-
-# If not already set, try to fetch newest from Github
-if [ -z "${MILL_VERSION}" ] ; then
- # TODO: try to load latest version from release page
- echo "No mill version specified." 1>&2
- echo "You should provide a version via '.mill-version' file or --mill-version option." 1>&2
-
- mkdir -p "${MILL_DOWNLOAD_PATH}"
- LANG=C touch -d '1 hour ago' "${MILL_DOWNLOAD_PATH}/.expire_latest" 2>/dev/null || (
- # we might be on OSX or BSD which don't have -d option for touch
- # but probably a -A [-][[hh]mm]SS
- touch "${MILL_DOWNLOAD_PATH}/.expire_latest"; touch -A -010000 "${MILL_DOWNLOAD_PATH}/.expire_latest"
- ) || (
- # in case we still failed, we retry the first touch command with the intention
- # to show the (previously suppressed) error message
- LANG=C touch -d '1 hour ago' "${MILL_DOWNLOAD_PATH}/.expire_latest"
- )
-
- # POSIX shell variant of bash's -nt operator, see https://unix.stackexchange.com/a/449744/6993
- # if [ "${MILL_DOWNLOAD_PATH}/.latest" -nt "${MILL_DOWNLOAD_PATH}/.expire_latest" ] ; then
- if [ -n "$(find -L "${MILL_DOWNLOAD_PATH}/.latest" -prune -newer "${MILL_DOWNLOAD_PATH}/.expire_latest")" ]; then
- # we know a current latest version
- MILL_VERSION=$(head -n 1 "${MILL_DOWNLOAD_PATH}"/.latest 2> /dev/null)
- fi
-
- if [ -z "${MILL_VERSION}" ] ; then
- # we don't know a current latest version
- echo "Retrieving latest mill version ..." 1>&2
- LANG=C ${CURL_CMD} -s -i -f -I ${MILL_REPO_URL}/releases/latest 2> /dev/null | grep --ignore-case Location: | sed s'/^.*tag\///' | tr -d '\r\n' > "${MILL_DOWNLOAD_PATH}/.latest"
- MILL_VERSION=$(head -n 1 "${MILL_DOWNLOAD_PATH}"/.latest 2> /dev/null)
- fi
-
- if [ -z "${MILL_VERSION}" ] ; then
- # Last resort
- MILL_VERSION="${DEFAULT_MILL_VERSION}"
- echo "Falling back to hardcoded mill version ${MILL_VERSION}" 1>&2
- else
- echo "Using mill version ${MILL_VERSION}" 1>&2
- fi
-fi
-
-MILL="${MILL_DOWNLOAD_PATH}/${MILL_VERSION}"
-
-try_to_use_system_mill() {
- if [ "$(uname)" != "Linux" ]; then
- return 0
- fi
-
- MILL_IN_PATH="$(command -v mill || true)"
-
- if [ -z "${MILL_IN_PATH}" ]; then
- return 0
- fi
-
- SYSTEM_MILL_FIRST_TWO_BYTES=$(head --bytes=2 "${MILL_IN_PATH}")
- if [ "${SYSTEM_MILL_FIRST_TWO_BYTES}" = "#!" ]; then
- # MILL_IN_PATH is (very likely) a shell script and not the mill
- # executable, ignore it.
- return 0
- fi
-
- SYSTEM_MILL_PATH=$(readlink -e "${MILL_IN_PATH}")
- SYSTEM_MILL_SIZE=$(stat --format=%s "${SYSTEM_MILL_PATH}")
- SYSTEM_MILL_MTIME=$(stat --format=%y "${SYSTEM_MILL_PATH}")
-
- if [ ! -d "${MILL_USER_CACHE_DIR}" ]; then
- mkdir -p "${MILL_USER_CACHE_DIR}"
- fi
-
- SYSTEM_MILL_INFO_FILE="${MILL_USER_CACHE_DIR}/system-mill-info"
- if [ -f "${SYSTEM_MILL_INFO_FILE}" ]; then
- parseSystemMillInfo() {
- LINE_NUMBER="${1}"
- # Select the line number of the SYSTEM_MILL_INFO_FILE, cut the
- # variable definition in that line in two halves and return
- # the value, and finally remove the quotes.
- sed -n "${LINE_NUMBER}p" "${SYSTEM_MILL_INFO_FILE}" |\
- cut -d= -f2 |\
- sed 's/"\(.*\)"/\1/'
- }
-
- CACHED_SYSTEM_MILL_PATH=$(parseSystemMillInfo 1)
- CACHED_SYSTEM_MILL_VERSION=$(parseSystemMillInfo 2)
- CACHED_SYSTEM_MILL_SIZE=$(parseSystemMillInfo 3)
- CACHED_SYSTEM_MILL_MTIME=$(parseSystemMillInfo 4)
-
- if [ "${SYSTEM_MILL_PATH}" = "${CACHED_SYSTEM_MILL_PATH}" ] \
- && [ "${SYSTEM_MILL_SIZE}" = "${CACHED_SYSTEM_MILL_SIZE}" ] \
- && [ "${SYSTEM_MILL_MTIME}" = "${CACHED_SYSTEM_MILL_MTIME}" ]; then
- if [ "${CACHED_SYSTEM_MILL_VERSION}" = "${MILL_VERSION}" ]; then
- MILL="${SYSTEM_MILL_PATH}"
- return 0
- else
- return 0
- fi
- fi
- fi
-
- SYSTEM_MILL_VERSION=$(${SYSTEM_MILL_PATH} --version | head -n1 | sed -n 's/^Mill.*version \(.*\)/\1/p')
-
- cat < "${SYSTEM_MILL_INFO_FILE}"
-CACHED_SYSTEM_MILL_PATH="${SYSTEM_MILL_PATH}"
-CACHED_SYSTEM_MILL_VERSION="${SYSTEM_MILL_VERSION}"
-CACHED_SYSTEM_MILL_SIZE="${SYSTEM_MILL_SIZE}"
-CACHED_SYSTEM_MILL_MTIME="${SYSTEM_MILL_MTIME}"
-EOF
-
- if [ "${SYSTEM_MILL_VERSION}" = "${MILL_VERSION}" ]; then
- MILL="${SYSTEM_MILL_PATH}"
- fi
-}
-try_to_use_system_mill
-
-# If not already downloaded, download it
-if [ ! -s "${MILL}" ] ; then
-
- # support old non-XDG download dir
- MILL_OLD_DOWNLOAD_PATH="${HOME}/.mill/download"
- OLD_MILL="${MILL_OLD_DOWNLOAD_PATH}/${MILL_VERSION}"
- if [ -x "${OLD_MILL}" ] ; then
- MILL="${OLD_MILL}"
- else
- case $MILL_VERSION in
- 0.0.* | 0.1.* | 0.2.* | 0.3.* | 0.4.* )
- DOWNLOAD_SUFFIX=""
- DOWNLOAD_FROM_MAVEN=0
- ;;
- 0.5.* | 0.6.* | 0.7.* | 0.8.* | 0.9.* | 0.10.* | 0.11.0-M* )
- DOWNLOAD_SUFFIX="-assembly"
- DOWNLOAD_FROM_MAVEN=0
- ;;
- *)
- DOWNLOAD_SUFFIX="-assembly"
- DOWNLOAD_FROM_MAVEN=1
- ;;
- esac
-
- DOWNLOAD_FILE=$(mktemp mill.XXXXXX)
-
- if [ "$DOWNLOAD_FROM_MAVEN" = "1" ] ; then
- DOWNLOAD_URL="https://repo1.maven.org/maven2/com/lihaoyi/mill-dist/${MILL_VERSION}/mill-dist-${MILL_VERSION}.jar"
- else
- MILL_VERSION_TAG=$(echo "$MILL_VERSION" | sed -E 's/([^-]+)(-M[0-9]+)?(-.*)?/\1\2/')
- DOWNLOAD_URL="${GITHUB_RELEASE_CDN}${MILL_REPO_URL}/releases/download/${MILL_VERSION_TAG}/${MILL_VERSION}${DOWNLOAD_SUFFIX}"
- unset MILL_VERSION_TAG
- fi
-
- # TODO: handle command not found
- echo "Downloading mill ${MILL_VERSION} from ${DOWNLOAD_URL} ..." 1>&2
- ${CURL_CMD} -f -L -o "${DOWNLOAD_FILE}" "${DOWNLOAD_URL}"
- chmod +x "${DOWNLOAD_FILE}"
- mkdir -p "${MILL_DOWNLOAD_PATH}"
- mv "${DOWNLOAD_FILE}" "${MILL}"
-
- unset DOWNLOAD_FILE
- unset DOWNLOAD_SUFFIX
- fi
-fi
-
-if [ -z "$MILL_MAIN_CLI" ] ; then
- MILL_MAIN_CLI="${0}"
-fi
-
-MILL_FIRST_ARG=""
-if [ "$1" = "--bsp" ] || [ "$1" = "-i" ] || [ "$1" = "--interactive" ] || [ "$1" = "--no-server" ] || [ "$1" = "--repl" ] || [ "$1" = "--help" ] ; then
- # Need to preserve the first position of those listed options
- MILL_FIRST_ARG=$1
- shift
-fi
-
-unset MILL_DOWNLOAD_PATH
-unset MILL_OLD_DOWNLOAD_PATH
-unset OLD_MILL
-unset MILL_VERSION
-unset MILL_REPO_URL
-
-# We don't quote MILL_FIRST_ARG on purpose, so we can expand the empty value without quotes
-# shellcheck disable=SC2086
-exec "${MILL}" $MILL_FIRST_ARG -D "mill.main.cli=${MILL_MAIN_CLI}" "$@"
\ No newline at end of file
diff --git a/programs/example.bin b/programs/example.bin
deleted file mode 100644
index eed82c7..0000000
Binary files a/programs/example.bin and /dev/null differ
diff --git a/programs/fib-loop.bin b/programs/fib-loop.bin
deleted file mode 100644
index 78c56bc..0000000
Binary files a/programs/fib-loop.bin and /dev/null differ
diff --git a/programs/fib.bin b/programs/fib.bin
deleted file mode 100644
index aea6f9e..0000000
Binary files a/programs/fib.bin and /dev/null differ
diff --git a/programs/frame-test.asm b/programs/frame-test.asm
new file mode 100644
index 0000000..9cdee33
--- /dev/null
+++ b/programs/frame-test.asm
@@ -0,0 +1,7 @@
+addi x3, x3, 0
+addi x1, x0, 0xE0
+lui x2, 0x4
+add x4, x2, x3
+sw x1, 0(x4)
+addi x3, x3, 1
+jal x0, -12
\ No newline at end of file
diff --git a/programs/hello.c b/programs/hello.c
index 4892496..03d2ac3 100644
--- a/programs/hello.c
+++ b/programs/hello.c
@@ -2,12 +2,12 @@ __attribute__((naked)) void _start(void) {
__asm__ volatile(
"li sp, 0x4000\n" // top of 32KB RAM
"call main\n"
- "loop: j loop\n");
+ "loop: j loop\n"
+ );
}
int main() {
- volatile unsigned char* frame = (volatile unsigned char*)0x0;
- volatile unsigned char* btns = (volatile unsigned char*)0x4B000000;
+ volatile unsigned int* frame = (volatile unsigned int*)0x4000;
int paddY1 = 120;
int paddY2 = 120;
@@ -16,100 +16,80 @@ int main() {
int ballY = 120;
int dX = 1;
int dY = 1;
-
+
for (int i = 0; i < 320; i++) {
- frame[0x4000 * i] = 0xFF;
- frame[0x4000 * (239 * 320 + i)] = 0xFF;
- frame[0x4000 * (320 * i + 1)] = 0xFF;
- frame[0x4000 * (320 * i + 319)] = 0xFF;
+ frame[i] = 0xFF;
+ frame[239 * 320 + i] = 0xFF;
+ frame[320 * i + 1] = 0xFF;
+ frame[320 * i + 319] = 0xFF;
}
- int counter = 0;
-
while (1) {
- counter += 1;
-
- if (counter == 8000) {
- counter = 0;
-
- for (int x = -2; x <= 2; x++) {
- for (int y = -2; y <= 2; y++) {
- frame[0x4000 * (320 * (ballY + y) + ballX + x)] = 0x00;
- }
- }
-
- for (int x = -2; x <= 2; x++) {
- for (int y = -20; y <= 20; y++) {
- frame[0x4000 * (320 * (paddY1 + y) + 20 + x)] = 0x00;
- }
- }
-
- for (int x = -2; x <= 2; x++) {
- for (int y = -20; y <= 20; y++) {
- frame[0x4000 * (320 * (paddY2 + y) + 299 + x)] = 0x00;
- }
- }
-
- if (*btns & 0b0001 && paddY1 < 239 - 21) {
- paddY1 += 1;
+ for (int x = -2; x <= 2; x++) {
+ for (int y = -2; y <= 2; y++) {
+ frame[320 * (ballY + y) + ballX + x] = 0x00;
}
+ }
- if (*btns & 0b0010 && paddY1 > 21) {
- paddY1 -= 1;
+ for (int x = -2; x <= 2; x++) {
+ for (int y = -20; y <= 20; y++) {
+ frame[320 * (paddY1 + y) + 20 + x] = 0x00;
}
+ }
- if (*btns & 0b0100 && paddY2 < 239 - 21) {
- paddY2 += 1;
+ for (int x = -2; x <= 2; x++) {
+ for (int y = -20; y <= 20; y++) {
+ frame[320 * (paddY2 + y) + 299 + x] = 0x00;
}
+ }
- if (*btns & 0b1000 && paddY2 > 21) {
- paddY2 -= 1;
- }
+ ballX += dX;
+ ballY += dY;
- ballX += dX;
- ballY += dY;
+ if (ballX == 319 - 6) {
+ dX = -1;
+ }
- if (ballX == 319 - 6) {
- dX = -1;
- }
+ if (ballX == 6) {
+ dX = 1;
+ }
- if (ballX == 6) {
- dX = 1;
- }
+ if (ballY == 239 - 6) {
+ dY = -1;
+ }
- if (ballY == 239 - 6) {
- dY = -1;
- }
+ if (ballY == 6) {
+ dY = 1;
+ }
- if (ballY == 6) {
- dY = 1;
- }
+ if (ballX <= 25 && ballX >= 15 && ballY <= paddY1 + 25 && ballY >= paddY1 - 25) {
+ dX = 1;
+ }
- if (ballX <= 25 && ballX >= 15 && ballY <= paddY1 + 25 && ballY >= paddY1 - 25) {
- dX = 1;
- }
+ if (ballX <= 304 && ballX >= 294 && ballY <= paddY2 + 25 && ballY >= paddY2 - 25) {
+ dX = -1;
+ }
- if (ballX <= 304 && ballX >= 294 && ballY <= paddY2 + 25 && ballY >= paddY2 - 25) {
- dX = -1;
+ for (int x = -2; x <= 2; x++) {
+ for (int y = -2; y <= 2; y++) {
+ frame[320 * (ballY + y) + ballX + x] = 0xFF;
}
+ }
- for (int x = -2; x <= 2; x++) {
- for (int y = -2; y <= 2; y++) {
- frame[0x4000 * (320 * (ballY + y) + ballX + x)] = 0xFF;
- }
+ for (int x = -2; x <= 2; x++) {
+ for (int y = -20; y <= 20; y++) {
+ frame[320 * (paddY1 + y) + 20 + x] = 0x03;
}
+ }
- for (int x = -2; x <= 2; x++) {
- for (int y = -20; y <= 20; y++) {
- frame[0x4000 * (320 * (paddY1 + y) + 20 + x)] = 0x03;
- }
+ for (int x = -2; x <= 2; x++) {
+ for (int y = -20; y <= 20; y++) {
+ frame[320 * (paddY2 + y) + 299 + x] = 0xE0;
}
+ }
- for (int x = -2; x <= 2; x++) {
- for (int y = -20; y <= 20; y++) {
- frame[0x4000 * (320 * (paddY2 + y) + 299 + x)] = 0xE0;
- }
- }
+ for (int i = 0; i < 8000; i++) {
+ __asm__ volatile("nop");
}
}
}
\ No newline at end of file
diff --git a/programs/hello.hex b/programs/hello.hex
index 1fede73..4f2339d 100644
--- a/programs/hello.hex
+++ b/programs/hello.hex
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diff --git a/programs/hello.s b/programs/hello.s
deleted file mode 100644
index ece0061..0000000
--- a/programs/hello.s
+++ /dev/null
@@ -1,78 +0,0 @@
- .file "hello.c"
- .option nopic
- .attribute arch, "rv32i2p1"
- .attribute unaligned_access, 0
- .attribute stack_align, 16
- .text
- .align 2
- .globl _start
- .type _start, @function
-_start:
- #APP
-# 2 "./programs/hello.c" 1
- li sp, 0x4000
-call main
-loop: j loop
-
-# 0 "" 2
- #NO_APP
- nop
- .size _start, .-_start
- .align 2
- .globl main
- .type main, @function
-main:
- addi sp,sp,-48
- sw ra,44(sp)
- sw s0,40(sp)
- addi s0,sp,48
- sw zero,-28(s0)
- sw zero,-32(s0)
- sw zero,-36(s0)
- sw zero,-20(s0)
- j .L3
-.L4:
- lw a5,-20(s0)
- slli a5,a5,14
- mv a4,a5
- lw a5,-28(s0)
- add a5,a5,a4
- li a4,-1
- sb a4,0(a5)
- lw a4,-20(s0)
- li a5,36864
- addi a5,a5,1216
- add a5,a4,a5
- slli a5,a5,14
- mv a4,a5
- lw a5,-28(s0)
- add a5,a5,a4
- li a4,-1
- sb a4,0(a5)
- lw a5,-20(s0)
- addi a5,a5,1
- sw a5,-20(s0)
-.L3:
- lw a4,-20(s0)
- li a5,319
- ble a4,a5,.L4
-.L7:
- sw zero,-24(s0)
- j .L5
-.L6:
- #APP
-# 24 "./programs/hello.c" 1
- nop
-# 0 "" 2
- #NO_APP
- lw a5,-24(s0)
- addi a5,a5,1
- sw a5,-24(s0)
-.L5:
- lw a4,-24(s0)
- li a5,1999
- ble a4,a5,.L6
- j .L7
- .size main, .-main
- .ident "GCC: (xPack GNU RISC-V Embedded GCC x86_64) 15.2.0"
- .section .note.GNU-stack,"",@progbits
diff --git a/programs/hello2.hex b/programs/hello2.hex
new file mode 100644
index 0000000..6ae9e53
--- /dev/null
+++ b/programs/hello2.hex
@@ -0,0 +1,191 @@
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diff --git a/programs/mandelbrot.hex b/programs/mandelbrot.hex
deleted file mode 100644
index 7c3a3cc..0000000
--- a/programs/mandelbrot.hex
+++ /dev/null
@@ -1,196 +0,0 @@
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-fe442703
-fec42783
-fcf744e3
-fe842683
-fd842603
-fdc42583
-fe042503
-d25ff0ef
-fec42783
-00178793
-fef42623
-fec42703
-00800793
-f8e7d6e3
-fe042623
-f85ff06f
diff --git a/programs/test.hex b/programs/test.hex
deleted file mode 100644
index 012f1e8..0000000
--- a/programs/test.hex
+++ /dev/null
@@ -1,10 +0,0 @@
-00004137
-000041b7
-7d000293
-00108093
-00218133
-00110023
-00000213
-00120213
-fe521ee3
-fe9ff06f
\ No newline at end of file
diff --git a/simulate.sh b/simulate.sh
new file mode 100755
index 0000000..274d1e7
--- /dev/null
+++ b/simulate.sh
@@ -0,0 +1,3 @@
+cd generated
+verilator --cc --exe --build -j 0 ../simulation/vga-image.cpp -f filelist.f --top Main
+./obj_dir/VMain
\ No newline at end of file
diff --git a/simulation/VGAController.sv b/simulation/VGAController.sv
deleted file mode 100644
index afac2f3..0000000
--- a/simulation/VGAController.sv
+++ /dev/null
@@ -1,35 +0,0 @@
-// Generated by CIRCT firtool-1.128.0
-module VGAController(
- input clock,
- reset,
- output io_hsync,
- io_vsync,
- output [11:0] io_rgb,
- output io_blanking,
- output [9:0] io_hPos,
- io_vPos
-);
-
- reg [9:0] hCount;
- reg [9:0] vCount;
- wire active = hCount < 10'h280 & vCount < 10'h1E0;
- always @(posedge clock) begin
- if (reset) begin
- hCount <= 10'h0;
- vCount <= 10'h0;
- end
- else begin
- automatic logic _GEN = hCount == 10'h31F;
- hCount <= _GEN ? 10'h0 : hCount + 10'h1;
- if (_GEN)
- vCount <= vCount == 10'h20C ? 10'h0 : vCount + 10'h1;
- end
- end // always @(posedge)
- assign io_hsync = ~(hCount > 10'h28F & hCount < 10'h2F0);
- assign io_vsync = ~(vCount > 10'h1E9 & vCount < 10'h1EC);
- assign io_rgb = {12{active}};
- assign io_blanking = ~active;
- assign io_hPos = hCount;
- assign io_vPos = vCount;
-endmodule
-
diff --git a/simulation/frame.png b/simulation/frame.png
deleted file mode 100644
index 2fc60a3..0000000
Binary files a/simulation/frame.png and /dev/null differ
diff --git a/simulation/frame.ppm b/simulation/frame.ppm
deleted file mode 100644
index 7cef7bc..0000000
--- a/simulation/frame.ppm
+++ /dev/null
@@ -1,4 +0,0 @@
-P6
-640 480
-255
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ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿ
\ No newline at end of file
diff --git a/simulation/vga-image.cpp b/simulation/vga-image.cpp
index 9b3fc6e..572ec2a 100644
--- a/simulation/vga-image.cpp
+++ b/simulation/vga-image.cpp
@@ -1,50 +1,149 @@
-#include "VVGAController.h"
+#include "VMain.h"
#include "verilated.h"
#include
#include
+#include
+#include
-static constexpr int H_TOTAL = 800;
-static constexpr int V_TOTAL = 525;
-static constexpr int H_ACTIVE = 640;
-static constexpr int V_ACTIVE = 480;
+static constexpr int H_VISIBLE = 640;
+static constexpr int H_FRONT = 16;
+static constexpr int H_SYNC = 96;
+static constexpr int H_BACK = 48;
+static constexpr int H_TOTAL = H_VISIBLE + H_FRONT + H_SYNC + H_BACK;
+
+static constexpr int V_VISIBLE = 480;
+static constexpr int V_FRONT = 10;
+static constexpr int V_SYNC = 2;
+static constexpr int V_BACK = 33;
+static constexpr int V_TOTAL = V_VISIBLE + V_FRONT + V_SYNC + V_BACK;
int main(int argc, char** argv) {
Verilated::commandArgs(argc, argv);
- auto dut = std::make_unique();
+ auto dut = std::make_unique();
+
+ dut->io_execute = 0;
+ dut->io_flash = 0;
+ dut->io_flash_address = 0;
+ dut->io_flash_value = 0;
+ dut->io_btns = 0;
+
+ dut->reset = 1;
+ dut->clock = 0;
+ dut->io_vga_clk = 0;
- // Reset
- dut->reset = 1; dut->clock = 0;
for (int i = 0; i < 4; i++) {
dut->clock ^= 1;
+ dut->io_vga_clk = dut->clock;
dut->eval();
}
+
dut->reset = 0;
- // Framebuffer
- std::vector pixels(H_ACTIVE * V_ACTIVE * 3, 0);
+ std::vector pixels(H_VISIBLE * V_VISIBLE * 3, 0);
+
+ int hCount = 0;
+ int vCount = 0;
+
+ std::ifstream file("/home/liamh/RISC-V/programs/hello.hex");
+
+ std::string line;
+ int address = 0;
+
+ while (std::getline(file, line)) {
+ if (line.empty()) continue;
+
+ uint32_t value = std::stoul(line, nullptr, 16);
+
+ dut->io_flash = 1;
+ dut->io_flash_address = address;
+ dut->io_flash_value = value;
+
+ printf("Writing %x at %d\n", value, address);
+
+ dut->clock = 1;
+ dut->io_vga_clk = 1;
+ dut->eval();
+ dut->clock = 0;
+ dut->io_vga_clk = 0;
+ dut->eval();
+
+ address++;
+ }
+
+ dut->io_flash = 0;
+ dut->io_flash_address = 0;
+ dut->io_flash_value = 0;
+
+ for (int i = 0; i < 4; i++) {
+ dut->clock ^= 1;
+ dut->io_vga_clk = dut->clock;
+ dut->eval();
+ }
+
+ dut->io_execute = 1;
+
+ // for (int i = 0; i < 2 * 64; i++) {
+ // dut->clock ^= 1;
+ // dut->io_vga_clk = dut->clock;
+ // dut->eval();
+ // }
+
+ bool prev_vsync = 1;
+ int pixelIdx = 0;
+
+ while (1) {
+ pixelIdx = 0;
+
+ while (true) {
+ dut->clock = 1; dut->io_vga_clk = 1; dut->eval();
+ bool vsync = dut->io_vsync;
+ dut->clock = 0; dut->io_vga_clk = 0; dut->eval();
- // Run one full frame
- for (int cycle = 0; cycle < H_TOTAL * V_TOTAL; cycle++) {
- dut->clock = 1; dut->eval();
- dut->clock = 0; dut->eval();
+ if (prev_vsync && !vsync) break;
+ prev_vsync = vsync;
+ }
+ prev_vsync = 0;
+
+ for (int cycle = 0; cycle < H_TOTAL * V_TOTAL; cycle++) {
+ dut->clock = 1; dut->io_vga_clk = 1; dut->eval();
- if (!dut->io_blanking) {
- int x = dut->io_hPos;
- int y = dut->io_vPos;
+ bool vsync = dut->io_vsync;
+ bool blanking = dut->io_blanking;
uint16_t rgb12 = dut->io_rgb;
- int idx = (y * H_ACTIVE + x) * 3;
- pixels[idx + 0] = ((rgb12 >> 8) & 0xF) * 17;
- pixels[idx + 1] = ((rgb12 >> 4) & 0xF) * 17;
- pixels[idx + 2] = ((rgb12 >> 0) & 0xF) * 17;
+
+ dut->clock = 0; dut->io_vga_clk = 0; dut->eval();
+
+ if (prev_vsync && !vsync) {
+ printf("vsync mid-frame at cycle %d — counter mismatch!\n", cycle);
+ }
+ prev_vsync = vsync;
+
+ if (!blanking && pixelIdx < H_VISIBLE * V_VISIBLE) {
+ pixels[pixelIdx * 3 + 0] = ((rgb12 >> 8) & 0xF) * 17;
+ pixels[pixelIdx * 3 + 1] = ((rgb12 >> 4) & 0xF) * 17;
+ pixels[pixelIdx * 3 + 2] = ((rgb12 >> 0) & 0xF) * 17;
+ pixelIdx++;
+ }
}
+
+ printf("Captured %d pixels (expected %d)\n", pixelIdx, H_VISIBLE * V_VISIBLE);
+
+ FILE* f = fopen("frame.ppm", "wb");
+ if (!f) { perror("fopen"); return 1; }
+ fprintf(f, "P6\n%d %d\n255\n", H_VISIBLE, V_VISIBLE);
+ fwrite(pixels.data(), 1, pixels.size(), f);
+ fclose(f);
+ system("ffmpeg -i frame.ppm frame.png -y");
}
- // Write PPM
+ dut->final();
+
FILE* f = fopen("frame.ppm", "wb");
- fprintf(f, "P6\n%d %d\n255\n", H_ACTIVE, V_ACTIVE);
+ if (!f) { perror("fopen"); return 1; }
+ fprintf(f, "P6\n%d %d\n255\n", H_VISIBLE, V_VISIBLE);
fwrite(pixels.data(), 1, pixels.size(), f);
fclose(f);
+ system("ffmpeg -i frame.ppm frame.png -y");
- dut->final();
- printf("Wrote frame.ppm\n");
+ return 0;
}
\ No newline at end of file
diff --git a/src/main/resources/memory.asm b/src/main/resources/memory.asm
new file mode 100644
index 0000000..f6fc519
--- /dev/null
+++ b/src/main/resources/memory.asm
@@ -0,0 +1,3 @@
+addi x1, x0, 123
+sw x1, 0(x2)
+lw x2, 0(x2)
\ No newline at end of file
diff --git a/src/main/resources/memory.hex b/src/main/resources/memory.hex
new file mode 100644
index 0000000..714799f
--- /dev/null
+++ b/src/main/resources/memory.hex
@@ -0,0 +1,3 @@
+07b00093
+00112023
+00012103
\ No newline at end of file
diff --git a/src/main/resources/program.asm b/src/main/resources/program.asm
new file mode 100644
index 0000000..8484b1f
--- /dev/null
+++ b/src/main/resources/program.asm
@@ -0,0 +1,4 @@
+addi x1, x0, 1000
+addi x2, x0, 200
+addi x3, x1, 300
+addi x4, x1, 400
\ No newline at end of file
diff --git a/src/main/resources/program.hex b/src/main/resources/program.hex
new file mode 100644
index 0000000..92e322a
--- /dev/null
+++ b/src/main/resources/program.hex
@@ -0,0 +1,4 @@
+3e800093
+0c800113
+12c08193
+19008213
\ No newline at end of file
diff --git a/src/main/scala/RISCV/Core.scala b/src/main/scala/RISCV/Core.scala
new file mode 100644
index 0000000..d2efd7e
--- /dev/null
+++ b/src/main/scala/RISCV/Core.scala
@@ -0,0 +1,202 @@
+package RISCV
+
+import chisel3._
+import _root_.circt.stage.ChiselStage
+import scala.math._
+
+class Core() extends Module {
+ val io = IO(new Bundle {
+ val execute = Input(Bool())
+
+ val program_memory_adress = Output(UInt(32.W))
+ val program_memory_value = Input(UInt(32.W))
+
+ val memory_address = Output(UInt(32.W))
+ val memory_read = Output(Bool())
+ val memory_read_value = Input(UInt(32.W))
+ val memory_write = Output(Bool())
+ val memory_write_value = Output(UInt(32.W))
+ })
+
+ val program_pointer = RegInit(0.U(32.W))
+
+ val registers = Module(new Registers())
+ registers.io.write_enable := false.B
+ registers.io.write_address := 0.U(5.W)
+ registers.io.in := 0.U(32.W)
+ registers.io.read_address_a := 0.U(5.W)
+ registers.io.read_address_b := 0.U(5.W)
+
+ // ==== FETCH ====
+
+ val fetch_stage = Module(new FetchStage())
+ fetch_stage.io.execute := io.execute
+ fetch_stage.io.program_pointer := program_pointer
+ fetch_stage.io.memory_read_value := io.program_memory_value
+
+ io.program_memory_adress := fetch_stage.io.memory_read_address
+
+ // ==== DECODE ====
+
+ val decode_stage = Module(new DecodeStage())
+ decode_stage.io.instruction := fetch_stage.io.instruction
+ decode_stage.io.instruction_pointer := fetch_stage.io.next_instruction_pointer
+ decode_stage.io.valid := fetch_stage.io.next_valid
+
+ // ==== READ ====
+
+ val read_stage = Module(new ReadStage())
+ read_stage.io.instruction := decode_stage.io.decoded
+ read_stage.io.register_value_a := registers.io.out_a
+ read_stage.io.register_value_b := registers.io.out_b
+ read_stage.io.instruction_pointer := decode_stage.io.next_instruction_pointer
+ read_stage.io.valid := decode_stage.io.next_valid
+
+ registers.io.read_address_a := read_stage.io.register_read_a
+ registers.io.read_address_b := read_stage.io.register_read_b
+
+ // ==== EXECUTE 1 ====
+
+ val execute_stage_1 = Module(new ExecuteStage1())
+ execute_stage_1.io.instruction := read_stage.io.next_instruction
+ execute_stage_1.io.rs1 := read_stage.io.out_a
+ execute_stage_1.io.rs2 := read_stage.io.out_b
+ execute_stage_1.io.instruction_pointer := read_stage.io.next_instruction_pointer
+ execute_stage_1.io.valid := read_stage.io.next_valid
+
+ fetch_stage.io.flush := execute_stage_1.io.program_pointer_jump_flush || read_stage.io.raw_hazard_flush || execute_stage_1.io.memory_use_flush
+ decode_stage.io.flush := execute_stage_1.io.program_pointer_jump_flush || read_stage.io.raw_hazard_flush || execute_stage_1.io.memory_use_flush
+ read_stage.io.flush := execute_stage_1.io.program_pointer_jump_flush || read_stage.io.raw_hazard_flush || execute_stage_1.io.memory_use_flush
+ execute_stage_1.io.flush := execute_stage_1.io.memory_use_flush
+
+ when(io.execute) {
+ when(execute_stage_1.io.program_pointer_jump_flush || execute_stage_1.io.memory_use_flush) {
+ program_pointer := execute_stage_1.io.program_pointer_target
+ }.otherwise {
+ when(read_stage.io.raw_hazard_flush) {
+ program_pointer := read_stage.io.program_pointer_target
+ }.otherwise {
+ program_pointer := program_pointer + 4.U
+ }
+ }
+ }
+
+ // ==== EXECUTE 2 ====
+
+ val execute_stage_2 = Module(new ExecuteStage2())
+ execute_stage_2.io.instruction := execute_stage_1.io.next_instruction
+ execute_stage_2.io.rs1 := execute_stage_1.io.next_rs1
+ execute_stage_2.io.rs2 := execute_stage_1.io.next_rs2
+ execute_stage_2.io.instruction_pointer := execute_stage_1.io.next_instruction_pointer
+ execute_stage_2.io.valid := execute_stage_1.io.next_valid
+ execute_stage_2.io.previous_out := execute_stage_1.io.out
+
+ execute_stage_2.io.memory_read_value := io.memory_read_value
+
+ when(execute_stage_2.io.memory_write) {
+ io.memory_read := false.B
+ io.memory_write := true.B
+ io.memory_address := execute_stage_2.io.memory_write_address
+ io.memory_write_value := execute_stage_2.io.memory_write_value
+ }.otherwise {
+ when(execute_stage_1.io.memory_read) {
+ io.memory_read := true.B
+ io.memory_write := false.B
+ io.memory_address := execute_stage_1.io.memory_read_address
+ io.memory_write_value := 0.U
+ }.otherwise {
+ io.memory_read := false.B
+ io.memory_write := false.B
+ io.memory_address := 0.U
+ io.memory_write_value := 0.U
+ }
+ }
+
+ // ==== WRITE ====
+
+ val write_stage = Module(new WriteStage())
+ write_stage.io.instruction := execute_stage_2.io.next_instruction
+ write_stage.io.value := execute_stage_2.io.out
+ write_stage.io.valid := execute_stage_2.io.next_valid
+
+ registers.io.write_enable := write_stage.io.register_write
+ registers.io.write_address := write_stage.io.register_address
+ registers.io.in := write_stage.io.register_value
+
+ when(io.execute) {
+ printf("Program Pointer: %d\n", program_pointer);
+
+ // printf("\n\n\n=== Fetch ===\n");
+ // printf("Program Pointer: %d\n", program_pointer);
+ // printf("Data: %b\n", fetch_stage.io.instruction);
+ // printf("Valid: %b\n", fetch_stage.io.next_valid);
+
+ // printf("=== Decode ===\n");
+ // printf("Opcode: %b\n", decode_stage.io.decoded.opcode);
+ // printf("Immediate: %b\n", decode_stage.io.decoded.immediate);
+ // printf("Rd: %d\n", decode_stage.io.decoded.rd);
+ // printf("Rs1: %d\n", decode_stage.io.decoded.rs1);
+ // printf("Rs2: %d\n", decode_stage.io.decoded.rs2);
+ // printf("Valid: %b\n", decode_stage.io.next_valid);
+
+ // printf("=== Read ===\n");
+ // printf("Opcode: %b\n", read_stage.io.instruction.opcode);
+ // printf("A: %b\n", read_stage.io.out_a);
+ // printf("B: %b\n", read_stage.io.out_b);
+ // printf("Valid: %b\n", read_stage.io.next_valid);
+ // printf("RAW Flush Requested: %b\n", read_stage.io.raw_hazard_flush);
+ // printf("Jump Target: %d\n", read_stage.io.program_pointer_target);
+
+ // printf("=== Execute 1 ===\n");
+ // printf("Opcode: %b\n", execute_stage_1.io.instruction.opcode);
+ // printf("Func3: %b\n", execute_stage_1.io.instruction.func3);
+ // printf("Out: %b\n", execute_stage_1.io.out);
+ // printf("Valid: %b\n", execute_stage_1.io.next_valid);
+ // printf("Read: %b\n", execute_stage_1.io.memory_read);
+ // printf("Read Adress: %b\n", execute_stage_1.io.memory_read_address);
+ // printf("Jump Flush Requested: %b\n", execute_stage_1.io.program_pointer_jump_flush);
+ // printf("Memory Flush Requested: %b\n", execute_stage_1.io.memory_use_flush);
+ // printf("Jump Target: %d\n", execute_stage_1.io.program_pointer_target);
+
+ // printf("=== Execute 2 ===\n");
+ // printf("Opcode: %b\n", execute_stage_2.io.instruction.opcode);
+ // printf("Func3: %b\n", execute_stage_2.io.instruction.func3);
+ // printf("Read Value: %b\n", execute_stage_2.io.memory_read_value);
+ // printf("Write: %b\n", execute_stage_2.io.memory_write);
+ // printf("Write Adress: %b\n", execute_stage_2.io.memory_write_address);
+ // printf("Write Value: %b\n", execute_stage_2.io.memory_write_value);
+ // printf("Out: %b\n", execute_stage_2.io.out);
+ // printf("Valid: %b\n", execute_stage_2.io.next_valid);
+
+ // printf("=== Write ===\n");
+ // printf("Opcode: %b\n", write_stage.io.instruction.opcode);
+ // printf("Write: %b\n", write_stage.io.register_write);
+ // printf("Address: %b\n", write_stage.io.register_address);
+ // printf("Value: %b\n", write_stage.io.register_value);
+ // printf("Valid: %b\n", write_stage.io.next_valid);
+
+ // printf("=== Dump ===\n");
+ // printf("01: %b\n", registers.io.debug_1);
+ // printf("02: %b\n", registers.io.debug_2);
+ // printf("03: %b\n", registers.io.debug_3);
+ // printf("04: %b\n", registers.io.debug_4);
+ // printf("05: %b\n", registers.io.debug_5);
+ // printf("06: %b\n", registers.io.debug_6);
+ // printf("07: %b\n", registers.io.debug_7);
+ // printf("08: %b\n", registers.io.debug_8);
+ // printf("09: %b\n", registers.io.debug_9);
+ // printf("10: %b\n", registers.io.debug_10);
+ }
+}
+
+object Core extends App {
+ ChiselStage.emitSystemVerilogFile(
+ new Core(),
+ firtoolOpts = Array(
+ "-disable-all-randomization",
+ "-strip-debug-info",
+ "-default-layer-specialization=enable"
+ ),
+ args = Array("--target-dir", "generated")
+ )
+}
\ No newline at end of file
diff --git a/src/main/scala/RISCV/Decoder.scala b/src/main/scala/RISCV/Decoder.scala
index 2bb3cd2..8320bf1 100644
--- a/src/main/scala/RISCV/Decoder.scala
+++ b/src/main/scala/RISCV/Decoder.scala
@@ -3,16 +3,12 @@ package RISCV
import chisel3._
import chisel3.util._
import _root_.circt.stage.ChiselStage
-import upickle.default
object InstructionFormat extends ChiselEnum {
val R, I, S, B, U, J = Value
}
-/** @param width
- * Bit width (default: 32 bits)
- */
-class Decoder(val width: Int = 32) extends Module {
+class Decoder() extends Module {
val io = IO(new Bundle {
val instruction = Input(UInt(32.W));
val rs1 = Output(UInt(5.W));
diff --git a/src/main/scala/RISCV/Main.scala b/src/main/scala/RISCV/Main.scala
index 3e2ae24..b9a7292 100644
--- a/src/main/scala/RISCV/Main.scala
+++ b/src/main/scala/RISCV/Main.scala
@@ -1,49 +1,32 @@
package RISCV
import chisel3._
-import chisel3.util._
import _root_.circt.stage.ChiselStage
import scala.math._
-import os.read
-
-
class Main() extends Module {
val io = IO(new Bundle {
- val execute = Input(Bool());
+ val execute = Input(Bool())
- val vga_clk = Input(Clock());
- val debug_write = Input(Bool());
- val debug_write_address = Input(UInt(32.W));
- val debug_write_data = Input(UInt(32.W));
+ val flash = Input(Bool())
+ val flash_address = Input(UInt(32.W))
+ val flash_value = Input(UInt(32.W))
+ val vga_clk = Input(Clock());
val hsync = Output(Bool())
val vsync = Output(Bool())
val rgb = Output(UInt(12.W))
val blanking = Output(Bool())
val btns = Input(UInt(4.W))
-
- val debug_1 = Output(UInt(32.W))
- val debug_2 = Output(UInt(32.W))
})
-
-
- val program_pointer = RegInit(0.U(32.W))
-
- val registers = Module(new Registers())
- registers.io.write_enable := false.B
- registers.io.write_address := 0.U(5.W)
- registers.io.read_address_a := 0.U(5.W)
- registers.io.read_address_b := 0.U(5.W)
- registers.io.read_address_c := 0.U(5.W)
- registers.io.in := 0.U(32.W)
-
-
-
val memory = Module(new Memory())
- memory.io.btns := io.btns
+ memory.io.read_1 := true.B
+ memory.io.write_1 := false.B
+ memory.io.write_value_1 := 0.U
+
+ memory.io.btns := io.btns
val vga_controller = Module(new VGAController())
vga_controller.io.address := memory.io.address_vga
@@ -55,325 +38,28 @@ class Main() extends Module {
io.rgb := vga_controller.io.rgb
io.blanking := vga_controller.io.blanking
- val decoder = Module(new Decoder())
- decoder.io.instruction := 0.U;
-
- // 0 - Load Instruction 1 - Execute Instruction A 2 - Execute Instruction B
- val stage = RegInit(0.U(3.W));
-
-
-
- memory.io.write_1 := false.B
- memory.io.read_1 := false.B
- memory.io.address_1 := 0.U
- memory.io.write_value_1 := 0.U
-
- memory.io.write_2 := false.B
- memory.io.read_2 := false.B
- memory.io.address_2 := 0.U
- memory.io.write_value_2 := 0.U
-
-
-
- when(io.debug_write) {
- memory.io.write_1 := true.B
- memory.io.address_1 := io.debug_write_address
- memory.io.write_value_1 := io.debug_write_data
- }
-
- val immediate_buffer = RegInit(0.U(32.W));
- val rs1_buffer = RegInit(0.U(5.W));
- val rs2_buffer = RegInit(0.U(5.W));
- val rd_buffer = RegInit(0.U(5.W));
- val opcode_buffer = RegInit(0.U(7.W));
- val funct3_buffer = RegInit(0.U(3.W));
- val funct7_buffer = RegInit(0.U(7.W));
- val out_a_buffer = RegInit(0.U(32.W));
- val out_b_buffer = RegInit(0.U(32.W));
-
- io.debug_1 := program_pointer
- io.debug_2 := stage ## opcode_buffer
-
- val alu = Module(new ALU())
- alu.io.func7 := funct7_buffer;
- alu.io.func3 := funct3_buffer;
- alu.io.a := out_a_buffer;
- alu.io.b := 0.U(32.W)
- alu.io.isM := false.B
- when(io.execute) {
- printf("\n");
- printf("Stage: %d\n", stage);
-
- when(stage =/= 0.U) {
- printf("Program Pointer: %d\n", program_pointer);
- printf("Data 1: %b\n", memory.io.read_value_1);
- printf("Data 2: %b\n", memory.io.read_value_2);
- printf("Register 1: %b\n", registers.io.debug_1);
- printf("Register 2: %b\n", registers.io.debug_2);
- printf("Register 3: %b\n", registers.io.debug_3);
- printf("Register 4: %b\n", registers.io.debug_4);
- printf("Register 5: %b\n", registers.io.debug_5);
- printf("Register 6: %b\n", registers.io.debug_6);
- printf("Register 7: %b\n", registers.io.debug_7);
- printf("Register 8: %b\n", registers.io.debug_8);
- printf("Register 9: %b\n", registers.io.debug_9);
- printf("Register10: %b\n", registers.io.debug_10);
- }
-
- stage := stage + 1.U;
-
- when(stage === 0.U){
- memory.io.read_1 := true.B
- memory.io.address_1 := program_pointer / 4.U
- }
-
- when(stage === 1.U) {
- decoder.io.instruction := memory.io.read_value_1
-
- immediate_buffer := decoder.io.immediate
- rs1_buffer := decoder.io.rs1
- rs2_buffer := decoder.io.rs2
- rd_buffer := decoder.io.rd
- opcode_buffer := decoder.io.opcode
- funct3_buffer := decoder.io.func3
- funct7_buffer := decoder.io.func7
- registers.io.read_address_a := decoder.io.rs1
- registers.io.read_address_b := decoder.io.rs2
- out_a_buffer := registers.io.out_a
- out_b_buffer := registers.io.out_b
-
-
- }
-
- when(stage === 2.U) {
-
-
-
- val pc_plus_4 = program_pointer + 4.U
- val pc_plus_imm = program_pointer + immediate_buffer
- val addr = out_a_buffer + immediate_buffer
-
- switch(opcode_buffer){
- //Load
- is("b0000011".U) {
-
- program_pointer := pc_plus_4;
- memory.io.read_1 := true.B
- memory.io.address_1 := (addr) / 4.U;
- memory.io.read_2 := true.B
- memory.io.address_2 := (addr) / 4.U + 1.U;
-
- }
- //Store
- is("b0100011".U){
-
- program_pointer := pc_plus_4;
- memory.io.read_1 := true.B
- memory.io.address_1 := (addr) / 4.U;
- memory.io.read_2 := true.B
- memory.io.address_2 := (addr) / 4.U + 1.U;
-
- }
- //ALU Imm,Reg
- is("b0010011".U, "b0110011".U){
-
- registers.io.write_address := rd_buffer
- registers.io.write_enable := true.B
- program_pointer := pc_plus_4
- stage := 0.U
- val neg = Mux(opcode_buffer === "b0110011".U && funct7_buffer(5), - out_b_buffer, out_b_buffer)
- val alu_b = Mux(opcode_buffer === "b0010011".U, immediate_buffer, neg)
- alu.io.b := alu_b
- alu.io.isM := opcode_buffer === "b0110011".U && funct7_buffer === "b0000001".U
- registers.io.in := alu.io.output
-
- }
- //Branch
- is("b1100011".U){
- stage := 0.U;
- val eq = out_a_buffer === out_b_buffer
- val lt_signed = out_a_buffer.asSInt < out_b_buffer.asSInt
- val lt_unsigned = out_a_buffer < out_b_buffer
- val lt_sel = Mux(funct3_buffer(1), lt_unsigned,lt_signed)
- val lt_eq_sel = Mux(funct3_buffer(2),lt_sel,eq)
- val take_branch = lt_eq_sel ^ funct3_buffer(0)
- program_pointer := Mux(take_branch, pc_plus_imm, pc_plus_4)
- }
- //LUI
- is("b0110111".U){
- registers.io.write_address := rd_buffer;
- registers.io.write_enable := true.B;
- registers.io.in := immediate_buffer;
-
- program_pointer := pc_plus_4;
- stage := 0.U;
-
- // printf(
- // "[LUI] Rd: %d Immediate: %b\n",
- // decoder.io.rd,
- // decoder.io.immediate
- // );
- }
- //AUIPC
- is("b0010111".U){
- registers.io.write_address := rd_buffer;
- registers.io.write_enable := true.B;
- registers.io.in := pc_plus_imm;
-
- program_pointer := pc_plus_4;
- stage := 0.U;
-
- // printf(
- // "[AUIPC] Rd: %d Immediate: %b\n",
- // decoder.io.rd,
- // decoder.io.immediate
- // );
- }
- //JAL
- is("b1101111".U){
- registers.io.write_address := rd_buffer;
- registers.io.write_enable := true.B;
- registers.io.in := pc_plus_4
-
- program_pointer := pc_plus_imm;
- stage := 0.U;
-
- // printf(
- // "[JAL] Rd: %d Immediate: %b\n",
- // decoder.io.rd,
- // decoder.io.immediate
- // );
- }
- //JALR
- is("b1100111".U){
- registers.io.read_address_a := rs1_buffer;
-
- registers.io.write_address := rd_buffer;
- registers.io.write_enable := true.B;
- registers.io.in :=pc_plus_4;
-
- program_pointer := addr & ~1.U(32.W)
- stage := 0.U;
-
- // printf(
- // "[JALR] RS1: %d Rd: %d Immediate: %b\n",
- // decoder.io.rs1,
- // decoder.io.rd,
- // decoder.io.immediate
- // );
-
- }
- //FENCE
- is("b0001111".U){
- program_pointer := pc_plus_4;
- stage := 0.U;
- printf("[FENCE]");
-
- }
-
- }
-
-
- }
-
- when(stage === 3.U) {
- stage := 0.U
- val addr = out_a_buffer + immediate_buffer
- val byte_offset = addr(1, 0)
- val shift_amount = byte_offset ## 0.U(3.W)
-
- switch(opcode_buffer){
- //Loads
- is("b0000011".U){
-
- registers.io.read_address_a := rs1_buffer
- registers.io.write_address := rd_buffer
- registers.io.write_enable := true.B
-
- val raw_data = (memory.io.read_value_1 >> shift_amount | memory.io.read_value_2 << (32.U - shift_amount))
-
- switch(funct3_buffer){
- //LB
- is("b000".U){
- registers.io.in := Fill(24, raw_data(7)) ## raw_data(7, 0)
- }
- //LH
- is("b001".U){
- registers.io.in := Fill(16, raw_data(15)) ## raw_data(15, 0)
- }
- //LW
- is("b010".U){
- registers.io.in := raw_data
- }
- //LBU
- is("b100".U){
- registers.io.in := 0.U(24.W) ## raw_data(7, 0)
- }
- //LHU
- is("b101".U){
- registers.io.in := 0.U(16.W) ## raw_data(15, 0)
- }
- }
- }
- is("b0100011".U){
- registers.io.read_address_a := rs1_buffer
- registers.io.read_address_b := rs2_buffer
-
- memory.io.write_1 := true.B
- memory.io.address_1 := addr / 4.U
- memory.io.write_2 := true.B
- memory.io.address_2 := addr / 4.U + 1.U
-
- val value_1 = WireDefault(memory.io.read_value_1)
- val value_2 = WireDefault(memory.io.read_value_2)
-
- switch(funct3_buffer){
- is("b000".U) { // SB
- switch(byte_offset) {
- is(0.U) { value_1 := Cat(memory.io.read_value_1(31, 8), out_b_buffer(7, 0)) }
- is(1.U) { value_1 := Cat(memory.io.read_value_1(31, 16), out_b_buffer(7, 0), memory.io.read_value_1(7, 0)) }
- is(2.U) { value_1 := Cat(memory.io.read_value_1(31, 24), out_b_buffer(7, 0), memory.io.read_value_1(15, 0)) }
- is(3.U) { value_1 := Cat(out_b_buffer(7, 0), memory.io.read_value_1(23, 0)) }
- }
- }
- is("b001".U){ //SH
- switch(byte_offset) {
- is(0.U) { value_1 := Cat(memory.io.read_value_1(31, 16), out_b_buffer(15, 0)) }
- is(1.U) { value_1 := Cat(memory.io.read_value_1(31, 24), out_b_buffer(15, 0), memory.io.read_value_1(7, 0)) }
- is(2.U) { value_1 := Cat(out_b_buffer(15, 0), memory.io.read_value_1(15, 0)) }
- is(3.U) {
- value_1 := Cat(out_b_buffer(7, 0), memory.io.read_value_1(23, 0))
- value_2 := Cat(memory.io.read_value_2(31, 8), out_b_buffer(15, 8))
- }
- }
- }
- is("b010".U) { // SW
- switch(byte_offset) {
- is(0.U) { value_1 := out_b_buffer }
- is(1.U) {
- value_1 := Cat(out_b_buffer(23, 0), memory.io.read_value_1(7, 0))
- value_2 := Cat(memory.io.read_value_2(31, 8), out_b_buffer(31, 24))
- }
- is(2.U) {
- value_1 := Cat(out_b_buffer(15, 0), memory.io.read_value_1(15, 0))
- value_2 := Cat(memory.io.read_value_2(31, 16), out_b_buffer(31, 16))
- }
- is(3.U) {
- value_1 := Cat(out_b_buffer(7, 0), memory.io.read_value_1(23, 0))
- value_2 := Cat(memory.io.read_value_2(31, 24), out_b_buffer(31, 8))
- }
- }
- }
- }
- memory.io.write_value_1 := value_1
- memory.io.write_value_2 := value_2
-
- }
- }
-
-
- }
- }
+ val core = Module(new Core())
+ core.io.execute := io.execute
+
+ memory.io.address_1 := core.io.program_memory_adress / 4.U
+ core.io.program_memory_value := memory.io.read_value_1
+
+ memory.io.address_2 := core.io.memory_address
+ memory.io.read_2 := core.io.memory_read
+ memory.io.write_2 := core.io.memory_write
+ memory.io.write_value_2 := core.io.memory_write_value
+ core.io.memory_read_value := memory.io.read_value_2
+
+ when(!io.execute) {
+ printf("Loading...\n");
+
+ when(io.flash) {
+ memory.io.read_1 := false.B
+ memory.io.write_1 := true.B
+ memory.io.address_1 := io.flash_address
+ memory.io.write_value_1 := io.flash_value
+ }
+ }
}
object Main extends App {
@@ -386,4 +72,4 @@ object Main extends App {
),
args = Array("--target-dir", "generated")
)
-}
+}
\ No newline at end of file
diff --git a/src/main/scala/RISCV/Memory.scala b/src/main/scala/RISCV/Memory.scala
index 3f43b78..91ff5af 100644
--- a/src/main/scala/RISCV/Memory.scala
+++ b/src/main/scala/RISCV/Memory.scala
@@ -25,54 +25,31 @@ class Memory() extends Module {
val btns = Input(UInt(4.W))
})
- val memory = SyncReadMem(1024, UInt(32.W))
- loadMemoryFromFileInline(memory, "program.hex")
-
- io.address_vga := 0.U
- io.write_vga := true.B
- io.write_value_vga := 0.U
- io.read_value_1 := 0.U
- io.read_value_2 := 0.U
-
- val isVGA = io.address_1 >= 0b1000000000000.U;
- io.address_vga := Mux(isVGA, io.address_1 / 0b1000000000000.U - 1.U, 0.U);
- io.write_vga := isVGA && io.write_1
- io.write_value_vga := io.write_value_1
-
- when(io.write_1) {
- when(isVGA) {
- printf(
- "Writing to VGA! Address: %b Data: %b\n",
- io.address_1 / 0b1000000000000.U - 1.U,
- io.write_value_1
- );
- }.otherwise {
- printf(
- "Writing to Memory! Address: %b Data: %b\n",
- io.address_1,
- io.write_value_1
- );
- }
- }
+ val memory = SyncReadMem(4096, UInt(32.W))
io.read_value_1 := memory.readWrite(
io.address_1,
io.write_value_1,
- (io.read_1 || io.write_1) && !isVGA,
+ io.read_1 || io.write_1,
io.write_1
)
+ val is_vga = io.address_2 >= 0x1000.U
+ io.address_vga := io.address_2 - 0x1000.U
+ io.write_vga := is_vga && io.write_2
+ io.write_value_vga := io.write_value_2
+
io.read_value_2 := memory.readWrite(
io.address_2,
io.write_value_2,
- (io.read_2 || io.write_2) && !isVGA,
+ (io.read_2 || io.write_2) && !is_vga,
io.write_2
)
val is_btns = RegInit(false.B)
- is_btns := io.read_1 && io.address_1 === 0x12c00000.U // 0x4B000000
+ is_btns := io.read_2 && io.address_2 === 0x12c00000.U // 0x4B000000
when(is_btns) {
- io.read_value_1 := io.btns
+ io.read_value_2 := io.btns
}
}
diff --git a/src/main/scala/RISCV/Registers.scala b/src/main/scala/RISCV/Registers.scala
index 84774b4..8bf755a 100644
--- a/src/main/scala/RISCV/Registers.scala
+++ b/src/main/scala/RISCV/Registers.scala
@@ -25,15 +25,15 @@ import _root_.circt.stage.ChiselStage
class Registers() extends Module {
val io = IO(new Bundle {
- val in = Input(UInt(32.W))
+ val write_enable = Input(Bool())
val write_address = Input(UInt(5.W))
+ val in = Input(UInt(32.W))
+
val read_address_a = Input(UInt(5.W))
val read_address_b = Input(UInt(5.W))
- val read_address_c = Input(UInt(5.W)) // Testing address port
- val write_enable = Input(Bool())
- val out_a = Output(UInt(32.W))
+
+ val out_a = Output(UInt(32.W))
val out_b = Output(UInt(32.W))
- val out_c = Output(UInt(32.W)) // Testing output port
val debug_1 = Output(UInt(32.W));
val debug_2 = Output(UInt(32.W));
@@ -52,7 +52,6 @@ class Registers() extends Module {
// Dual read ports
io.out_a := regs(io.read_address_a)
io.out_b := regs(io.read_address_b)
- io.out_c := regs(io.read_address_c)
io.debug_1 := regs(1);
io.debug_2 := regs(2);
diff --git a/src/main/scala/RISCV/UARTRx.scala b/src/main/scala/RISCV/UARTRx.scala
new file mode 100644
index 0000000..792c076
--- /dev/null
+++ b/src/main/scala/RISCV/UARTRx.scala
@@ -0,0 +1,82 @@
+package RISCV
+
+
+import chisel3._
+import chisel3.util._
+
+class UartRx(val clockFreq: Int, val baudRate: Int) extends Module {
+ val io = IO(new Bundle {
+ val rxd = Input(Bool())
+ val data = Output(UInt(8.W))
+ val valid = Output(Bool())
+ })
+
+ val cyclesPerBit = (clockFreq / baudRate).U
+ val halfBit = (clockFreq / baudRate / 2).U
+
+ val counter = RegInit(0.U(16.W))
+ val bitIdx = RegInit(0.U(4.W))
+ val shiftReg = RegInit(0.U(8.W))
+ val dataReg = RegInit(0.U(8.W))
+ val validReg = RegInit(false.B)
+
+ val sIdle :: sStart :: sData :: sStop :: Nil = Enum(4)
+ val state = RegInit(sIdle)
+
+ val rxSync = RegNext(RegNext(io.rxd, true.B), true.B)
+
+ io.data := dataReg
+ io.valid := validReg
+ validReg := false.B
+
+ switch(state) {
+ is(sIdle) {
+ when(!rxSync) {
+ counter := halfBit - 1.U
+ state := sStart
+ }
+ }
+
+ is(sStart) {
+ when(counter === 0.U) {
+ when(!rxSync) {
+ counter := cyclesPerBit - 1.U
+ bitIdx := 0.U
+ state := sData
+ }.otherwise {
+ state := sIdle
+ }
+ }.otherwise {
+ counter := counter - 1.U
+ }
+ }
+
+ is(sData) {
+ when(counter === 0.U) {
+ shiftReg := Cat(rxSync, shiftReg(7, 1))
+ counter := cyclesPerBit - 1.U
+ bitIdx := bitIdx + 1.U
+ when(bitIdx === 7.U) {
+ state := sStop
+ }
+ }.otherwise {
+ counter := counter - 1.U
+ }
+ }
+
+ is(sStop) {
+ when(counter === 0.U) {
+ when(rxSync) {
+ dataReg := shiftReg
+ validReg := true.B
+ }
+ state := sIdle
+ }.otherwise {
+ counter := counter - 1.U
+ }
+ }
+ }
+ when(io.valid) {
+ printf(p"Byte Recieved: ${io.data}\n")
+}
+}
\ No newline at end of file
diff --git a/src/main/scala/RISCV/UARTTx.scala b/src/main/scala/RISCV/UARTTx.scala
new file mode 100644
index 0000000..e2531d7
--- /dev/null
+++ b/src/main/scala/RISCV/UARTTx.scala
@@ -0,0 +1,47 @@
+package RISCV
+
+
+import chisel3._
+import chisel3.util._
+
+
+class UartTx(val clockFreq: Int, val baudRate: Int) extends Module {
+ val io = IO(new Bundle {
+ val data = Input(UInt(8.W))
+ val valid = Input(Bool())
+ val ready = Output(Bool())
+ val txd = Output(Bool())
+ })
+
+ val cyclesPerBit = (clockFreq / baudRate).U
+ val counter = RegInit(0.U(16.W))
+ val bitIdx = RegInit(0.U(4.W))
+ val shiftReg = RegInit(0.U(10.W))
+ val busy = RegInit(false.B)
+
+ io.ready := !busy
+ io.txd := true.B
+ when(io.valid & !busy) {
+ printf(p"Sending Out: ${io.data}\n")
+ }
+ when(busy) {
+ io.txd := shiftReg(0)
+ when(counter === 0.U) {
+ counter := cyclesPerBit - 1.U
+ shiftReg := shiftReg >> 1
+ bitIdx := bitIdx + 1.U
+ when(bitIdx === 9.U) {
+ busy := false.B
+ }
+ }.otherwise {
+ counter := counter - 1.U
+ }
+ }.elsewhen(io.valid) {
+ shiftReg := Cat(1.U(1.W), io.data, 0.U(1.W))
+ busy := true.B
+ counter := cyclesPerBit - 1.U
+ bitIdx := 0.U
+ io.txd := false.B
+ }
+
+}
\ No newline at end of file
diff --git a/src/main/scala/RISCV/VGAController.scala b/src/main/scala/RISCV/VGAController.scala
index 8d2573d..0268c6b 100644
--- a/src/main/scala/RISCV/VGAController.scala
+++ b/src/main/scala/RISCV/VGAController.scala
@@ -27,18 +27,22 @@ class VGAController extends Module {
val vsync = Output(Bool())
val rgb = Output(UInt(12.W))
val blanking = Output(Bool())
-
})
val memory = SyncReadMem(320 * 240, UInt(8.W))
-
-
when(io.write) {
memory.write(io.address, io.write_value)
+
+ printf("\n\nWRITING TO VGA: %d %b\n\n", io.address, io.write_value);
}
- withClockAndReset(io.read_clk,reset) {
+ io.hsync := true.B
+ io.vsync := true.B
+ io.rgb := 0.U
+ io.blanking := true.B
+
+ withClockAndReset(io.read_clk, reset) {
val hCount = RegInit(0.U(10.W))
val vCount = RegInit(0.U(10.W))
@@ -79,13 +83,9 @@ class VGAController extends Module {
read_address := vCountMult
}
-
- val color = memory.read(read_address, true.B)
+ val color = memory.read(read_address, true.B, io.read_clk)
val pixel = color(7, 5) ## color(5) ## color(4, 2) ## color(2) ## color(1, 0) ## color(0) ## color(0)
io.rgb := Mux(active, pixel, 0.U)
-
- }
-
-
+ }
}
diff --git a/src/main/scala/RISCV/pipeline/DecodeStage.scala b/src/main/scala/RISCV/pipeline/DecodeStage.scala
new file mode 100644
index 0000000..f847736
--- /dev/null
+++ b/src/main/scala/RISCV/pipeline/DecodeStage.scala
@@ -0,0 +1,63 @@
+package RISCV
+
+import chisel3._
+import _root_.circt.stage.ChiselStage
+import scala.math._
+
+class InstructionBundle extends Bundle {
+ val rs1 = UInt(5.W)
+ val rs2 = UInt(5.W)
+ val rd = UInt(5.W)
+ val immediate = UInt(32.W)
+ val opcode = UInt(7.W)
+ val func3 = UInt(3.W)
+ val func7 = UInt(7.W)
+}
+
+class DecodeStage() extends Module {
+ val io = IO(new Bundle {
+ val instruction = Input(UInt(32.W))
+ val instruction_pointer = Input(UInt(32.W))
+ val valid = Input(Bool())
+
+ val decoded = Output(new InstructionBundle())
+ val next_instruction_pointer = Output(UInt(32.W))
+ val next_valid = Output(Bool())
+
+ val flush = Input(Bool())
+ })
+
+ val decoder = Module(new Decoder())
+ decoder.io.instruction := io.instruction
+
+ val rs1 = RegInit(0.U(5.W))
+ rs1 := decoder.io.rs1
+ val rs2 = RegInit(0.U(5.W))
+ rs2 := decoder.io.rs2
+ val rd = RegInit(0.U(5.W))
+ rd := decoder.io.rd
+ val immediate = RegInit(0.U(32.W))
+ immediate := decoder.io.immediate
+ val opcode = RegInit(0.U(7.W))
+ opcode := decoder.io.opcode
+ val func3 = RegInit(0.U(3.W))
+ func3 := decoder.io.func3
+ val func7 = RegInit(0.U(7.W))
+ func7 := decoder.io.func7
+
+ io.decoded.rs1 := rs1
+ io.decoded.rs2 := rs2
+ io.decoded.rd := rd
+ io.decoded.immediate := immediate
+ io.decoded.opcode := opcode
+ io.decoded.func3 := func3
+ io.decoded.func7 := func7
+
+ val next_instruction_pointer = RegInit(0.U(32.W))
+ next_instruction_pointer := io.instruction_pointer
+ io.next_instruction_pointer := next_instruction_pointer
+
+ val valid = RegInit(false.B)
+ valid := io.valid && !io.flush
+ io.next_valid := valid
+}
\ No newline at end of file
diff --git a/src/main/scala/RISCV/pipeline/ExecuteStage1.scala b/src/main/scala/RISCV/pipeline/ExecuteStage1.scala
new file mode 100644
index 0000000..de20411
--- /dev/null
+++ b/src/main/scala/RISCV/pipeline/ExecuteStage1.scala
@@ -0,0 +1,326 @@
+package RISCV
+
+import chisel3._
+import chisel3.util._
+import _root_.circt.stage.ChiselStage
+import scala.math._
+
+class ExecuteStage1() extends Module {
+ val io = IO(new Bundle {
+ val instruction = Input(new InstructionBundle())
+ val rs1 = Input(UInt(32.W))
+ val rs2 = Input(UInt(32.W))
+ val instruction_pointer = Input(UInt(32.W))
+ val valid = Input(Bool())
+
+ val next_instruction = Output(new InstructionBundle())
+ val next_instruction_pointer = Output(UInt(32.W))
+ val next_rs1 = Output(UInt(32.W))
+ val next_rs2 = Output(UInt(32.W))
+ val out = Output(UInt(32.W))
+ val next_valid = Output(Bool())
+
+ val flush = Input(Bool())
+
+ val program_pointer_jump_flush = Output(Bool())
+ val memory_use_flush = Output(Bool())
+ val program_pointer_target = Output(UInt(32.W))
+
+ val memory_read = Output(Bool())
+ val memory_read_address = Output(UInt(32.W))
+ })
+
+ val instruction = RegInit(0.U.asTypeOf(new InstructionBundle()))
+ instruction := io.instruction
+ io.next_instruction := instruction
+
+ val next_instruction_pointer = RegInit(0.U(32.W))
+ next_instruction_pointer := io.instruction_pointer
+ io.next_instruction_pointer := next_instruction_pointer
+
+ val rs1 = RegInit(0.U(32.W))
+ rs1 := io.rs1
+ io.next_rs1 := rs1
+
+ val rs2 = RegInit(0.U(32.W))
+ rs2 := io.rs2
+ io.next_rs2 := rs2
+
+ val out = RegInit(0.U(32.W))
+ out := 0.U
+ io.out := out
+
+ io.program_pointer_jump_flush := false.B
+ io.program_pointer_target := 0.U
+
+ io.memory_read := false.B
+ io.memory_read_address := 0.U
+
+ val interacting_with_memory = RegInit(false.B)
+ interacting_with_memory := false.B
+
+ io.memory_use_flush := false.B
+
+ when(io.valid) {
+ switch(io.instruction.opcode) {
+ // LUI
+ is("b0110111".U) {
+ out := io.instruction.immediate;
+ }
+
+ // AUIPC
+ is("b0010111".U) {
+ out := io.instruction_pointer + io.instruction.immediate;
+ }
+
+ is("b0010011".U) {
+ switch(io.instruction.func3) {
+ // ADDI
+ is("b000".U) {
+ out := io.rs1 + io.instruction.immediate
+ }
+
+ // SLLI
+ is("b001".U) {
+ out := io.rs1 << io.instruction.immediate(5, 0)
+ }
+
+ // SRLI and SRAI
+ is("b101".U) {
+ when(io.instruction.immediate(10) === 1.U) { // SRAI
+ out := (io.rs1.asSInt >> io.instruction.immediate(5, 0)).asUInt
+ }.otherwise { // SLAI
+ out := io.rs1 >> io.instruction.immediate(5, 0)
+ }
+ }
+
+ // SLTI
+ is("b010".U) {
+ when(io.rs1.asSInt < io.instruction.immediate.asSInt) {
+ out := 1.U;
+ }.otherwise {
+ out := 0.U;
+ }
+ }
+
+ // SLTIU
+ is("b011".U) {
+ when(io.rs1 < io.instruction.immediate) {
+ out := 1.U;
+ }.otherwise {
+ out := 0.U;
+ }
+ }
+
+ // XORI
+ is("b100".U) {
+ out := io.rs1 ^ io.instruction.immediate
+ }
+
+ // ORI
+ is("b110".U) {
+ out := io.rs1 | io.instruction.immediate
+ }
+
+ // ANDI
+ is("b111".U) {
+ out := io.rs1 & io.instruction.immediate
+ }
+ }
+ }
+
+ is("b0110011".U) {
+ switch(io.instruction.func3) {
+ // ADD
+ is("b0000000".U) {
+ out := io.rs1 + io.rs2
+ }
+
+ // SUB
+ is("b0110000".U) {
+ out := io.rs1 - io.rs2
+ }
+
+ // SLL
+ is("b001".U) {
+ out := io.rs1 << io.rs2(5, 0)
+ }
+
+ // SRL and SRA
+ is("b101".U) {
+ when(io.instruction.immediate(10) === 1.U) { // SRA
+ out := (io.rs1.asSInt >> io.rs2(5, 0)).asUInt
+ }.otherwise { // SLA
+ out := io.rs1 >> io.rs2(5, 0)
+ }
+ }
+
+ // SLT
+ is("b010".U) {
+ when(io.rs1.asSInt < io.rs2.asSInt) {
+ out := 1.U;
+ }.otherwise {
+ out := 0.U;
+ }
+ }
+
+ // SLTU
+ is("b011".U) {
+ when(io.rs1 < io.rs2) {
+ out := 1.U;
+ }.otherwise {
+ out := 0.U;
+ }
+ }
+
+ // XOR
+ is("b100".U) {
+ out := io.rs1 ^ io.rs2
+ }
+
+ // OR
+ is("b110".U) {
+ out := io.rs1 | io.rs2
+ }
+
+ // AND
+ is("b111".U) {
+ out := io.rs1 & io.rs2
+ }
+ }
+ }
+
+ // JAL
+ is("b1101111".U) {
+ out := io.instruction_pointer + 4.U
+
+ io.program_pointer_jump_flush := true.B
+ io.program_pointer_target := (io.instruction_pointer.zext + io.instruction.immediate.asSInt).asUInt
+ }
+
+ // JALR
+ is("b1100111".U) {
+ out := io.instruction_pointer + 4.U
+
+ io.program_pointer_jump_flush := true.B
+ io.program_pointer_target := (io.rs1.zext + io.instruction.immediate.asSInt).asUInt & ~1.U(32.W)
+ }
+
+ is("b1100011".U) {
+ switch(io.instruction.func3) {
+ // BEQ
+ is("b000".U) {
+ when(io.rs1 === io.rs2) {
+ io.program_pointer_jump_flush := true.B
+ io.program_pointer_target := (io.instruction_pointer.zext + io.instruction.immediate.asSInt).asUInt
+ }
+ }
+
+ // BNEQ
+ is("b001".U) {
+ when(io.rs1 =/= io.rs2) {
+ io.program_pointer_jump_flush := true.B
+ io.program_pointer_target := (io.instruction_pointer.zext + io.instruction.immediate.asSInt).asUInt
+ }
+ }
+
+ // BLT
+ is("b100".U) {
+ when(io.rs1.asSInt < io.rs2.asSInt) {
+ io.program_pointer_jump_flush := true.B
+ io.program_pointer_target := (io.instruction_pointer.zext + io.instruction.immediate.asSInt).asUInt
+ }
+ }
+
+ // BLTU
+ is("b110".U) {
+ when(io.rs1 < io.rs2) {
+ io.program_pointer_jump_flush := true.B
+ io.program_pointer_target := (io.instruction_pointer.zext + io.instruction.immediate.asSInt).asUInt
+ }
+ }
+
+ // BGE
+ is("b101".U) {
+ when(io.rs1.asSInt >= io.rs2.asSInt) {
+ io.program_pointer_jump_flush := true.B
+ io.program_pointer_target := (io.instruction_pointer.zext + io.instruction.immediate.asSInt).asUInt
+ }
+ }
+
+ // BGEU
+ is("b111".U) {
+ when(io.rs1 >= io.rs2) {
+ io.program_pointer_jump_flush := true.B
+ io.program_pointer_target := (io.instruction_pointer.zext + io.instruction.immediate.asSInt).asUInt
+ }
+ }
+ }
+ }
+
+ is("b0000011".U) {
+ when(interacting_with_memory) {
+ io.memory_use_flush := true.B
+ io.program_pointer_target := io.instruction_pointer
+ }.otherwise {
+ switch(io.instruction.func3) {
+ // LB
+ is("b000".U) {
+ io.memory_read := true.B
+ io.memory_read_address := (io.rs1.zext + io.instruction.immediate.asSInt).asUInt / 4.U
+ }
+
+ // LH
+ is("b001".U) {
+ io.memory_read := true.B
+ io.memory_read_address := (io.rs1.zext + io.instruction.immediate.asSInt).asUInt / 4.U
+ }
+
+ // LW
+ is("b010".U) {
+ io.memory_read := true.B
+ io.memory_read_address := (io.rs1.zext + io.instruction.immediate.asSInt).asUInt / 4.U
+ }
+ }
+ }
+ }
+
+ is("b0100011".U) {
+ when(interacting_with_memory) {
+ io.memory_use_flush := true.B
+ io.program_pointer_target := io.instruction_pointer
+ }.otherwise {
+ switch(io.instruction.func3) {
+ // SB
+ is("b000".U) {
+ io.memory_read := true.B
+ io.memory_read_address := (io.rs1.zext + io.instruction.immediate.asSInt).asUInt / 4.U
+
+ interacting_with_memory := true.B
+ }
+
+ // SH
+ is("b001".U) {
+ io.memory_read := true.B
+ io.memory_read_address := (io.rs1.zext + io.instruction.immediate.asSInt).asUInt / 4.U
+
+ interacting_with_memory := true.B
+ }
+
+ // SW
+ is("b010".U) {
+ io.memory_read := true.B
+ io.memory_read_address := (io.rs1.zext + io.instruction.immediate.asSInt).asUInt / 4.U
+
+ interacting_with_memory := true.B
+ }
+ }
+ }
+ }
+ }
+ }
+
+ val valid = RegInit(false.B)
+ valid := io.valid && !io.flush
+ io.next_valid := valid
+}
\ No newline at end of file
diff --git a/src/main/scala/RISCV/pipeline/ExecuteStage2.scala b/src/main/scala/RISCV/pipeline/ExecuteStage2.scala
new file mode 100644
index 0000000..d5d2e40
--- /dev/null
+++ b/src/main/scala/RISCV/pipeline/ExecuteStage2.scala
@@ -0,0 +1,134 @@
+package RISCV
+
+import chisel3._
+import chisel3.util._
+import _root_.circt.stage.ChiselStage
+import scala.math._
+
+class ExecuteStage2() extends Module {
+ val io = IO(new Bundle {
+ val instruction = Input(new InstructionBundle())
+ val rs1 = Input(UInt(32.W))
+ val rs2 = Input(UInt(32.W))
+ val instruction_pointer = Input(UInt(32.W))
+ val valid = Input(Bool())
+
+ val previous_out = Input(UInt(32.W))
+ val out = Output(UInt(32.W))
+ val next_instruction = Output(new InstructionBundle())
+ val next_valid = Output(Bool())
+
+ val memory_read_value = Input(UInt(32.W))
+ val memory_write = Output(Bool())
+ val memory_write_address = Output(UInt(32.W))
+ val memory_write_value = Output(UInt(32.W))
+ })
+
+ val instruction = RegInit(0.U.asTypeOf(new InstructionBundle()))
+ instruction := io.instruction
+ io.next_instruction := instruction
+
+ val out = RegInit(0.U(32.W))
+ out := io.previous_out
+ io.out := out
+
+ io.memory_write := false.B
+ io.memory_write_address := 0.U
+ io.memory_write_value := 0.U
+
+ when(io.valid) {
+ switch(io.instruction.opcode) {
+ is("b0000011".U) {
+ switch(io.instruction.func3) {
+ // LB
+ is("b000".U) {
+ val offset = (io.rs1.zext + io.instruction.immediate.asSInt).asUInt % 4.U
+
+ switch(offset) {
+ is(0.U) {
+ out := io.memory_read_value & 0xFF.U
+ }
+
+ is(1.U) {
+ out := io.memory_read_value >> 8.U & 0xFF.U
+ }
+
+ is(2.U) {
+ out := io.memory_read_value >> 16.U & 0xFF.U
+ }
+
+ is(3.U) {
+ out := io.memory_read_value >> 24.U & 0xFF.U
+ }
+ }
+ }
+
+ // LH
+ is("b001".U) {
+ when((io.rs1.zext + io.instruction.immediate.asSInt).asUInt % 4.U === 0.U) {
+ out := io.memory_read_value & 0xFFFF.U
+ }.otherwise {
+ out := io.memory_read_value >> 16.U
+ }
+ }
+
+ // LW
+ is("b010".U) {
+ out := io.memory_read_value
+ }
+ }
+ }
+
+ is("b0100011".U) {
+ switch(io.instruction.func3) {
+ // SB
+ is("b000".U) {
+ io.memory_write := true.B
+ io.memory_write_address := (io.rs1.zext + io.instruction.immediate.asSInt).asUInt / 4.U
+
+ switch((io.rs1.zext + io.instruction.immediate.asSInt).asUInt % 4.U) {
+ is(0.U) {
+ io.memory_write_value := io.memory_read_value(31, 8) ## io.rs2(7, 0)
+ }
+
+ is(1.U) {
+ io.memory_write_value := io.memory_read_value(31, 16) ## io.rs2(15, 8) ## io.memory_read_value(7, 0)
+ }
+
+ is(2.U) {
+ io.memory_write_value := io.memory_read_value(31, 24) ## io.rs2(23, 16) ## io.memory_read_value(15, 0)
+ }
+
+ is(3.U) {
+ io.memory_write_value := io.rs2(31, 24) ## io.memory_read_value(23, 0)
+ }
+ }
+ }
+
+ // SH
+ is("b001".U) {
+ io.memory_write := true.B
+ io.memory_write_address := (io.rs1.zext + io.instruction.immediate.asSInt).asUInt / 4.U
+
+ when((io.rs1.zext + io.instruction.immediate.asSInt).asUInt % 4.U === 0.U) {
+ io.memory_write_value := io.memory_read_value(31, 16) ## io.rs2(15, 0)
+ }.otherwise {
+ io.memory_write_value := io.rs2(31, 16) ## io.memory_read_value(15, 0)
+ }
+ }
+
+ // SW
+ is("b010".U) {
+ io.memory_write := true.B
+ io.memory_write_address := (io.rs1.zext + io.instruction.immediate.asSInt).asUInt / 4.U
+ io.memory_write_value := io.rs2
+ }
+ }
+ }
+ }
+ }
+
+ val valid = RegInit(false.B)
+ valid := io.valid
+ io.next_valid := valid
+}
\ No newline at end of file
diff --git a/src/main/scala/RISCV/pipeline/FetchStage.scala b/src/main/scala/RISCV/pipeline/FetchStage.scala
new file mode 100644
index 0000000..6e2aa9b
--- /dev/null
+++ b/src/main/scala/RISCV/pipeline/FetchStage.scala
@@ -0,0 +1,31 @@
+package RISCV
+
+import chisel3._
+import _root_.circt.stage.ChiselStage
+import scala.math._
+
+class FetchStage() extends Module {
+ val io = IO(new Bundle {
+ val execute = Input(Bool())
+ val program_pointer = Input(UInt(32.W))
+ val memory_read_value = Input(UInt(32.W))
+
+ val memory_read_address = Output(UInt(32.W))
+ val instruction = Output(UInt(32.W))
+ val next_instruction_pointer = Output(UInt(32.W))
+ val next_valid = Output(Bool())
+
+ val flush = Input(Bool())
+ })
+
+ io.memory_read_address := io.program_pointer
+ io.instruction := io.memory_read_value
+
+ val next_instruction_pointer = RegInit(0.U(32.W))
+ next_instruction_pointer := io.program_pointer
+ io.next_instruction_pointer := next_instruction_pointer
+
+ val valid = RegInit(false.B)
+ valid := io.execute && !io.flush
+ io.next_valid := valid
+}
\ No newline at end of file
diff --git a/src/main/scala/RISCV/pipeline/ReadStage.scala b/src/main/scala/RISCV/pipeline/ReadStage.scala
new file mode 100644
index 0000000..d6097a8
--- /dev/null
+++ b/src/main/scala/RISCV/pipeline/ReadStage.scala
@@ -0,0 +1,72 @@
+package RISCV
+
+import chisel3._
+import _root_.circt.stage.ChiselStage
+import scala.math._
+
+class ReadStage() extends Module {
+ val io = IO(new Bundle {
+ val instruction = Input(new InstructionBundle())
+ val instruction_pointer = Input(UInt(32.W))
+ val valid = Input(Bool())
+
+ val register_read_a = Output(UInt(5.W))
+ val register_value_a = Input(UInt(32.W))
+ val register_read_b = Output(UInt(5.W))
+ val register_value_b = Input(UInt(32.W))
+
+ val next_instruction = Output(new InstructionBundle())
+ val next_instruction_pointer = Output(UInt(32.W))
+ val next_valid = Output(Bool())
+
+ val flush = Input(Bool())
+
+ val raw_hazard_flush = Output(Bool())
+ val program_pointer_target = Output(UInt(32.W))
+
+ val out_a = Output(UInt(32.W))
+ val out_b = Output(UInt(32.W))
+ })
+
+ val rd_0 = RegInit(0.U(5.W))
+ val rd_1 = RegInit(0.U(5.W))
+
+ rd_0 := 0.U
+
+ when(io.valid) {
+ rd_0 := io.instruction.rd
+ }
+
+ rd_1 := rd_0
+
+ val raw_hazard_flush = io.valid && ((rd_0 =/= 0.U && (rd_0 === io.instruction.rs1 || rd_0 === io.instruction.rs2)) || (rd_1 =/= 0.U && (rd_1 === io.instruction.rs1 || rd_1 === io.instruction.rs2)))
+ io.raw_hazard_flush := raw_hazard_flush
+ io.program_pointer_target := 0.U
+
+ when(raw_hazard_flush) {
+ io.program_pointer_target := io.instruction_pointer
+ }
+
+ val instruction = RegInit(0.U.asTypeOf(new InstructionBundle()))
+ instruction := io.instruction
+ io.next_instruction := instruction
+
+ val out_a = RegInit(0.U(32.W))
+ val out_b = RegInit(0.U(32.W))
+ out_a := io.register_value_a
+ out_b := io.register_value_b
+
+ io.out_a := out_a
+ io.out_b := out_b
+
+ io.register_read_a := io.instruction.rs1
+ io.register_read_b := io.instruction.rs2
+
+ val next_instruction_pointer = RegInit(0.U(32.W))
+ next_instruction_pointer := io.instruction_pointer
+ io.next_instruction_pointer := next_instruction_pointer
+
+ val valid = RegInit(false.B)
+ valid := io.valid && !io.flush
+ io.next_valid := valid
+}
\ No newline at end of file
diff --git a/src/main/scala/RISCV/pipeline/WriteStage.scala b/src/main/scala/RISCV/pipeline/WriteStage.scala
new file mode 100644
index 0000000..316d3be
--- /dev/null
+++ b/src/main/scala/RISCV/pipeline/WriteStage.scala
@@ -0,0 +1,80 @@
+package RISCV
+
+import chisel3._
+import chisel3.util._
+import _root_.circt.stage.ChiselStage
+import scala.math._
+
+class WriteStage() extends Module {
+ val io = IO(new Bundle {
+ val instruction = Input(new InstructionBundle())
+ val value = Input(UInt(32.W))
+ val valid = Input(Bool())
+
+ val register_write = Output(Bool())
+ val register_address = Output(UInt(5.W))
+ val register_value = Output(UInt(32.W))
+ val next_valid = Output(Bool())
+ })
+
+ io.register_write := false.B;
+ io.register_address := 0.U;
+ io.register_value := 0.U;
+
+ when(io.valid) {
+ switch(io.instruction.opcode) {
+ // LUI
+ is("b0110111".U) {
+ io.register_write := true.B;
+ io.register_address := io.instruction.rd;
+ io.register_value := io.value;
+ }
+
+ // AUIPC
+ is("b0010111".U) {
+ io.register_write := true.B;
+ io.register_address := io.instruction.rd;
+ io.register_value := io.value;
+ }
+
+ // SLTI, SLTIU, SLLI, SRLI, SRAI, XORI, ORI, ANDI
+ is("b0010011".U) {
+ io.register_write := true.B;
+ io.register_address := io.instruction.rd;
+ io.register_value := io.value;
+ }
+
+ // ADD, SUB, SLL, SRL, SRA, SLT, SLTU, XOR, OR, AND
+ is("b0110011".U) {
+ io.register_write := true.B;
+ io.register_address := io.instruction.rd;
+ io.register_value := io.value;
+ }
+
+ // JAL
+ is("b1101111".U) {
+ io.register_write := true.B;
+ io.register_address := io.instruction.rd;
+ io.register_value := io.value;
+ }
+
+ // JALR
+ is("b1100111".U) {
+ io.register_write := true.B;
+ io.register_address := io.instruction.rd;
+ io.register_value := io.value;
+ }
+
+ // LW
+ is("b0000011".U) {
+ io.register_write := true.B;
+ io.register_address := io.instruction.rd;
+ io.register_value := io.value;
+ }
+ }
+ }
+
+ val valid = RegInit(false.B)
+ valid := io.valid
+ io.next_valid := valid
+}
\ No newline at end of file
diff --git a/src/test/scala/RISCV/MainSpec.scala b/src/test/scala/RISCV/MainSpec.scala
index 25c9932..430d26e 100644
--- a/src/test/scala/RISCV/MainSpec.scala
+++ b/src/test/scala/RISCV/MainSpec.scala
@@ -8,79 +8,54 @@ import scala.io.Source
import java.nio.file.{Files, Paths}
import java.nio.ByteBuffer
import chisel3.simulator.PeekPokeAPI.TestableRecord
+import scala.io.Source
class MainSpec extends AnyFreeSpec with Matchers with ChiselSim {
- "Main should execute Store and Load Instructions correctly" in {
- simulate(new Main()) { dut =>
- // Load hex file, one instruction per line
- val instructions = Source
- .fromFile("./programs/hello.hex")
- .getLines()
- .filter(_.trim.nonEmpty)
- .map(line => java.lang.Long.parseLong(line.trim, 16))
- .toSeq
-
- dut.io.debug_write.poke(true.B)
-
- instructions.zipWithIndex.foreach { case (instr, idx) =>
- dut.io.debug_write_address.poke(idx.U)
- dut.io.debug_write_data.poke(instr.U(32.W))
- dut.clock.step(1)
- }
+ // "Core should execute program.hex correctly" in {
+ // simulate(new Core()) { dut =>
+ // val path = getClass.getResource("/program.hex").getPath
+ // val lines = Source.fromFile(path).getLines().toList
- dut.io.debug_write.poke(false.B)
- dut.clock.step(1)
-
- dut.io.execute.poke(true.B)
- dut.clock.step(64)
- }
- }
+ // dut.io.flash.poke(true.B)
- // "Main should execute Store and Load Instructions correctly" in {
- // simulate(new Main()) { dut =>
- // dut.io.debug_write.poke(true.B)
+ // lines.zipWithIndex.foreach { case (line, index) =>
+ // val value = java.lang.Long.parseLong(line.trim, 16)
- // dut.io.debug_write_address.poke(0.U)
- // dut.io.debug_write_data.poke(0x00004137L.U)
- // dut.clock.step(1)
+ // dut.io.flash_address.poke((index * 4).U)
+ // dut.io.flash_value.poke(value.U)
+
+ // dut.clock.step(1)
+ // }
- // dut.io.debug_write_address.poke(1.U)
- // dut.io.debug_write_data.poke(0x000041b7L.U)
- // dut.clock.step(1)
+ // dut.io.flash.poke(false.B)
- // dut.io.debug_write_address.poke(2.U)
- // dut.io.debug_write_data.poke(0x00408093L.U)
- // dut.clock.step(1)
+ // dut.io.execute.poke(true.B)
- // dut.io.debug_write_address.poke(3.U)
- // dut.io.debug_write_data.poke(0x00218133L.U)
- // dut.clock.step(1)
+ // dut.clock.step(16)
+ // }
+ // }
- // dut.io.debug_write_address.poke(4.U)
- // dut.io.debug_write_data.poke(0x00110023L.U)
- // dut.clock.step(1)
+ "Main should execute memory.hex correctly" in {
+ simulate(new Main()) { dut =>
+ val path = getClass.getResource("/memory.hex").getPath
+ val lines = Source.fromFile(path).getLines().toList
- // dut.io.debug_write_address.poke(5.U)
- // dut.io.debug_write_data.poke(0xff5ff06fL.U)
- // dut.clock.step(1)
+ dut.io.flash.poke(true.B)
- // // dut.io.debug_write_address.poke(0.U)
- // // dut.io.debug_write_data.poke(0b000000000111_00000_000_00001_0010011.U) // ADDI
- // // dut.clock.step(1)
+ lines.zipWithIndex.foreach { case (line, index) =>
+ val value = java.lang.Long.parseLong(line.trim, 16)
- // // dut.io.debug_write_address.poke(1.U)
- // // dut.io.debug_write_data.poke(0b0000000_00001_00000_010_00000_0100011.U) // SW
- // // dut.clock.step(1)
+ dut.io.flash_address.poke(index.U)
+ dut.io.flash_value.poke(value.U)
+
+ dut.clock.step(1)
+ }
- // // dut.io.debug_write_address.poke(2.U)
- // // dut.io.debug_write_data.poke(0b000000000000_00000_010_00010_0000011.U) // LW
- // // dut.clock.step(1)
+ dut.io.flash.poke(false.B)
- // dut.io.debug_write.poke(false.B)
- // dut.clock.step(1)
+ dut.io.execute.poke(true.B)
- // dut.io.execute.poke(true.B)
- // dut.clock.step(24)
- // }
- // }
+ dut.clock.step(16)
+ }
+ }
}
diff --git a/vgaserial.py b/vgaserial.py
new file mode 100644
index 0000000..11ce790
--- /dev/null
+++ b/vgaserial.py
@@ -0,0 +1,58 @@
+#!/usr/bin/env python3
+import serial
+import numpy as np
+import pygame
+
+W, H = 320, 240
+BAUD = 8_000_000
+PORT = "/dev/ttyUSB1"
+
+pygame.init()
+screen = pygame.display.set_mode((W * 2, H * 2))
+pygame.display.set_caption("VGA over UART")
+clock = pygame.time.Clock()
+
+ser = serial.Serial(PORT, BAUD, timeout=1)
+ser.reset_input_buffer()
+
+buf = bytearray(W * H)
+
+def decode_pixel(b):
+ # 8-bit colour: RRRGGGBB
+ r = ((b >> 5) & 0x7) * 255 // 7
+ g = ((b >> 2) & 0x7) * 255 // 7
+ b_ = ( b & 0x3) * 255 // 3
+ return r, g, b_
+
+print(f"Listening on {PORT} at {BAUD} baud ...")
+
+running = True
+while running:
+ for event in pygame.event.get():
+ if event.type == pygame.QUIT:
+ running = False
+ if event.type == pygame.KEYDOWN and event.key == pygame.K_ESCAPE:
+ running = False
+
+ # read exactly one frame
+ raw = ser.read(W * H)
+ print(raw)
+ if len(raw) < W * H:
+ continue # timeout, skip
+
+ # build RGB array
+ arr = np.frombuffer(raw, dtype=np.uint8)
+ r = ((arr >> 5) & 0x7) * 255 // 7
+ g = ((arr >> 2) & 0x7) * 255 // 7
+ b = ( arr & 0x3) * 255 // 3
+
+ rgb = np.stack([r, g, b], axis=1).reshape(H, W, 3).astype(np.uint8)
+
+ surf = pygame.surfarray.make_surface(rgb.transpose(1, 0, 2))
+ surf = pygame.transform.scale(surf, (W * 2, H * 2))
+ screen.blit(surf, (0, 0))
+ pygame.display.flip()
+ clock.tick(60)
+
+ser.close()
+pygame.quit()
\ No newline at end of file