User manual

Writing your own software32

3.5.23

UsbDrDaqStartPulseCount

PICO_STATUS UsbDrDaqStartPulseCount(

short handle,

USB_DRDAQ_GPIO IOChannel,

short direction

)

This function is used to configure the general-purpose I/Os for pulse counting and to

start counting.

Arguments:

handle: handle returned from UsbDrDaqOpenUnit or

UsbDrDaqOpenUnitProgress

IOChannel: GPIOs 1 and 2 can be used as pulse-counting inputs.

direction: The direction of the edges to count (0:rising, 1:falling)

Returns:

PICO_OK

PICO_NOT_FOUND

PICO_NOT_RESPONDING

PICO_INVALID_PARAMETER