Skip to content

feat: optionally reset ext flash before use #967

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Open
vhdirk wants to merge 1 commit into
base: master
Choose a base branch
from
+21 −0
Open

feat: optionally reset ext flash before use #967

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
21 changes: 21 additions & 0 deletions src/spi_flash.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -49,8 +49,10 @@
#define BYTE_WRITE 0x02
#define AUTOINC 0xAD
#define EWSR 0x50
#define RSTEN 0x66
#define EBSY 0x70
#define DBSY 0x80
#define RST 0x99

#ifdef TEST_EXT_FLASH
static int test_ext_flash(void);
Expand Down Expand Up @@ -186,9 +188,28 @@ uint16_t spi_flash_probe(void)
int i;
spi_init(0,0);
wait_busy();

#ifdef RESET_EXT_FLASH
/* Reset Flash chip as it doesn't always respond properly to first request */
spi_cs_on(SPI_CS_PIO_BASE, SPI_CS_FLASH);
spi_write(RSTEN);
notused = spi_read();
spi_cs_off(SPI_CS_PIO_BASE, SPI_CS_FLASH);
for (i = 0; i < 10; i++);
spi_cs_on(SPI_CS_PIO_BASE, SPI_CS_FLASH);
spi_write(RST);
notused = spi_read();
spi_cs_off(SPI_CS_PIO_BASE, SPI_CS_FLASH);
for (i = 0; i < 18000; i++);

spi_cs_on(SPI_CS_PIO_BASE, SPI_CS_FLASH);
spi_write(MDID);
notused = spi_read();
write_address(0);
#else
notused = spi_read();
#endif

spi_write(0xFF);
manuf = spi_read();
spi_write(0xFF);
Expand Down