fw digitalreadpulsewidth

DigitalReadPulseWidth()

Reads the pulse width in uS of an active high or active low digital pulse with the option to send a stimulus pulse on the same or a different channel. If a pulse is not detected within the specified timeout a timeout status is returned.

Syntax

DigitalReadPulseWidth(unsigned char stimChan, unsigned char stimType, unsigned char respChan, unsigned char respType, unsigned long timeout, unsigned long* width);

stimChan
The digital output channel to send a stimulus pulse on. Only used if stimType is non-zero.

stimType
The type of stimulus pulse to send:

• 0 - No stimulus pulse
• 1 - Active low stimulus pulse (High->Low->High)
• 2 - Active high stimulus pulse (Low->High->Low)

respChan
The digital input channel to monitor for the response pulse.

respType
The polarity of the pulse width:

• 0 - Low
• 1 - High

timeout
The maximum time to wait for the response pulse.

width
A pointer to an unsigned long to store the detected pulse width in uS.

Returns

int status

Related Links

• DigitalRead()

• DigitalReadPulseWidth()

• DigitalWrite()

• DigitalWriteSquareWave()

• Firmware Reference