#include <stdio.h>
#include <fcntl.h>
#include <stdlib.h>

#include "apcilib.h"

int open_dev_file();

int main(int argc, char *argv[])
{
	__u8 RelayData[2];
	int Result0, Result1;
	int fd;

	if ( argc < 1 )
	{
		puts("Usage: PI16 [new relay mask, in hex]");
		puts("Example: PI16 AA55");
		return -1;
	}
	Result0 = sscanf(argv[1], "%X", &RelayData);
	if ( Result0 != 1 )
	{
		printf("Error %d from sscanf reading \"%s\".\n", Result0, argv[1]);
		return -2;
	}
	fd = open_dev_file();
	Result0 = apci_write8(fd, 0, 2, 0, RelayData[0]);
	Result1 = apci_write8(fd, 0, 2, 4, RelayData[1]);
	printf("Wrote %02X%02X (Got %d/%d)\n", RelayData[1], RelayData[0], Result0, Result1);
	Result0 = apci_read8(fd, 0, 2, 0, &RelayData[0]);
	Result1 = apci_read8(fd, 0, 2, 4, &RelayData[1]);
	printf("Read Back %02X%02X (Got %d/%d)\n", RelayData[1], RelayData[0], Result0, Result1);
	close(fd);
	return 0;
}

int open_dev_file()
{
	int fd;

	fd = open("/dev/apci", O_RDONLY);

	if (fd < 0)
	{
		printf("Device file could not be opened. Please ensure the iogen driver module is loaded.\n");
		exit(0);
	}
	
	return fd;

}