/*
 * Digital I/O example
 * Part of Comedilib
 *
 * Copyright (c) 1999,2000 David A. Schleef <ds@schleef.org>
 *
 * This file may be freely modified, distributed, and combined with
 * other software, as long as proper attribution is given in the
 * source code.
 */
/*
 * Requirements:  A board with a digital I/O subdevice.  Not just
 *    a 'digital input' or 'digital output' subdevice, but one in
 *    which the channels can be configured between input and output.
 */

#include <stdio.h>
#include <comedilib.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <errno.h>
#include <getopt.h>
#include <ctype.h>
#include "examples.h"

comedi_t *device;


int main(int argc, char *argv[])
{
	int ret;
	int stype;
	int i;
	unsigned int mask;
	unsigned int data;

	parse_options(argc,argv);

	device=comedi_open(filename);
	if(!device){
		comedi_perror(filename);
		exit(0);
	}

	stype = comedi_get_subdevice_type(device,subdevice);
	if(stype!=COMEDI_SUBD_DIO){
		printf("%d is not a digital I/O subdevice\n",subdevice);
		exit(0);
	}

	printf("configuring pin %d for output...\n",channel);

	ret=comedi_dio_config(device,subdevice,channel,COMEDI_OUTPUT);
	
	printf("toggling pin %d rapidly...\n",channel);

	for(i=0;i<10000;i++){
		comedi_dio_write(device,subdevice,channel,1);
		comedi_dio_write(device,subdevice,channel,0);
	}

	printf("toggling pin %d rapidly (using bitfield)...\n",channel);

	mask = 1<<channel;
	for(i=0;i<10000;i++){
		data = mask;
		comedi_dio_bitfield(device,subdevice,mask,&data);
		data = 0;
		comedi_dio_bitfield(device,subdevice,mask,&data);
	}

	return 0;
}