#include <stdlib.h>
#include <unistd.h>
#include <syslog.h>
#include <ftdi.h>

#include <def.h>

#define LED 0x08
int main(int argc, char *argv[])
{
    struct ftdi_context *ftdi;
    int f, retval, cnt;
    unsigned char buf[1];

    openlog("ftdi_gpio", LOG_CONS | LOG_PID | LOG_NDELAY, LOG_LOCAL1);
    setlogmask(LOG_DEBUG);

    if ((ftdi = ftdi_new()) == 0) {
        syslog(LOG_ERR, "ftdi_new failed\n");
        return EXIT_FAILURE;
    }

    f = ftdi_usb_open(ftdi, 0x0403, 0x6001);

    if (f < 0 && f != -5) {
        syslog(LOG_ERR, "unable to open ftdi device: %d (%s)\n", f, ftdi_get_error_string(ftdi));
        retval = 1;
        goto done;
    }

    f = ftdi_set_bitmode(ftdi, LED, BITMODE_BITBANG);
    if(f < 0) {
        syslog(LOG_ERR, "unable to set bit bang mode: %d (%s)\n", f, ftdi_get_error_string(ftdi));
        retval = 1;
        goto done;
    }

    buf[0] = 0;
    for(cnt = 0; cnt < 10; cnt++) {
        buf[0] ^= LED,
        f = ftdi_write_data(ftdi, buf, 1);
        if(f < 0) {
            syslog(LOG_ERR, "write failed for 0x%x, error %d (%s)\n",buf[0], f, ftdi_get_error_string(ftdi));
            cnt = 10;
        } else {
            syslog(LOG_DEBUG, "set LED to: %u\n", (unsigned int)buf[0]);
        }
        
        sleep(1);
    }

    ftdi_usb_close(ftdi);
done:
    ftdi_free(ftdi);
    closelog();

    return retval;
}