// pxlc driver
// flip bits on and off

#include <sys/types.h>
#include <inttypes.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <unistd.h>
#include <stdio.h>

#include "pxlc_if.h"

main(int argc, char *argv[]) {
    int fd, len, wlen;
    int i;
    uint32_t buf[2];
    unsigned char bytes[PXLC_BYTE_COUNT];
    int bitval;
    int bitnum;

    if (argc != 3) {
        printf("Usage: flip bitnum bitval\n");
	exit(0);
    }
    bitnum = atoi(argv[1]);
    bitval = atoi(argv[2]);
    printf("Flipping bit %d to %d\n", bitnum, bitval);

    fd = open("/dev/pxlc", O_RDWR);
    if (fd == -1) {
        perror("open");
        exit(0);
    }

    wlen = 8;
    if (bitval) {
	buf[0] = PXLC_OP_SETBIT;
    } else {
	buf[0] = PXLC_OP_CLRBIT;
    }

    buf[1] = bitnum;
    len = write(fd, buf, wlen);
    if (len == -1 ) {
        perror("setbit write error");
        exit(1);
    }

    close(fd);
}