
/* ftdi_out.c
 *
 * Output a (stream of) byte(s) in bitbang mode to the 
 * ftdi245 chip that is (hopefully) attached. 
 *
 * We have a little board that has a FT245BM chip and 
 * the 8 outputs are connected to several different 
 * things that we can turn on and off with this program. 
 *
 * If you have an idea about hardware that can easily
 * interface onto an FTDI chip, I'd like to collect
 * ideas. If I find it worthwhile to make, I'll consider
 * making it, I'll even send you a prototype (against
 * cost-of-material) if you want.
 * 
 * At "harddisk-recovery.nl" they have a little board that 
 * controls the power to two harddrives and two fans. 
 * 
 * -- REW R.E.Wolff@BitWizard.nl
 *
 *
 *
 * This program was based on libftdi_example_bitbang2232.c 
 * which doesn't carry an author or attribution header.
 *
 *
 * This program is distributed under the GPL, version 2. 
 * Millions copies of the GPL float around the internet.
 */


#include <stdio.h>
#include <unistd.h>
#include <usb.h>
#include <ftdi.h>


void ftdi_fatal (struct ftdi_context *ftdi, char *str)
{
  fprintf (stderr, "%s: %s\n", 
	   str, ftdi_get_error_string (ftdi));
  exit (1); 
}



int main(int argc, char **argv)
{
  struct ftdi_context ftdic;
  int i, t;
  unsigned char data;
  int delay = 100000; /* 100 thousand microseconds: 1 tenth of a second */

  while ((t = getopt (argc, argv, "d:")) != -1) {
    switch (t) {
    case 'd':
      delay = atoi (optarg);
      break;
    }
  }
  
  ftdi_init(&ftdic);

  if (ftdi_usb_open(&ftdic, 0x0403, 0x6001) < 0)
    ftdi_fatal (&ftdic, "Can't open ftdi device");

  if (ftdi_enable_bitbang(&ftdic, 0xFF) < 0)
    ftdi_fatal (&ftdic, "Can't enable bitbang"); 

  for (i=optind; i < argc ; i++) {
     sscanf (argv[i], "%x", &t);
     data = t;
     if(ftdi_write_data(&ftdic, &data, 1) < 0) {
        fprintf(stderr,"write failed for 0x%x: %s\n", 
		data, ftdic.error_str);
     }
     usleep(delay);
  }

  ftdi_usb_close(&ftdic);
  ftdi_deinit(&ftdic);
  exit (0);
}
