comedi_dio_config — change input/output properties of channel


#include <comedilib.h>
int comedi_dio_config(comedi_t * device,
 unsigned int subdevice,
 unsigned int channel,
 unsigned int direction);


The function comedi_dio_config configures individual channels in a digital I/O subdevice to be either input or output, depending on the value of direction. Valid directions are COMEDI_INPUT or COMEDI_OUTPUT.

Depending on the characteristics of the hardware device, multiple channels might be grouped together in hardware when configuring the input/output direction. In this case, a single call to comedi_dio_config for any channel in the group will affect the entire group.

Return value

If successful, 0 is returned, otherwise -1.