comedi_data_write - write single sample to channel
int comedi_data_write (comedi_t * device, unsigned int subdevice,
unsigned int channel, unsigned int range, unsigned int aref, lsampl_t
Writes a single sample on the channel that is specified by the Comedi
device device, the subdevice subdevice, and the channel channel. If
appropriate, the device is configured to use range specification range
and analog reference type aref. Analog reference types that are not
supported by the device are silently ignored.
The function comedi_data_write() writes the data value specified by the
parameter data to the specified channel.
On sucess, comedi_data_write() returns 1 (the number of samples
written). If there is an error, -1 is returned.
28 October 2007