| 1 | /* ftdi_out.c |
| 2 | * |
| 3 | * Output a (stream of) byte(s) in bitbang mode to the |
| 4 | * ftdi245 chip that is (hopefully) attached. |
| 5 | * |
| 6 | * We have a little board that has a FT245BM chip and |
| 7 | * the 8 outputs are connected to several different |
| 8 | * things that we can turn on and off with this program. |
| 9 | * |
| 10 | * If you have an idea about hardware that can easily |
| 11 | * interface onto an FTDI chip, I'd like to collect |
| 12 | * ideas. If I find it worthwhile to make, I'll consider |
| 13 | * making it, I'll even send you a prototype (against |
| 14 | * cost-of-material) if you want. |
| 15 | * |
| 16 | * At "harddisk-recovery.nl" they have a little board that |
| 17 | * controls the power to two harddrives and two fans. |
| 18 | * |
| 19 | * -- REW R.E.Wolff@BitWizard.nl |
| 20 | * |
| 21 | * |
| 22 | * |
| 23 | * This program was based on libftdi_example_bitbang2232.c |
| 24 | * which doesn't carry an author or attribution header. |
| 25 | * |
| 26 | * |
| 27 | * This program is distributed under the GPL, version 2. |
| 28 | * Millions copies of the GPL float around the internet. |
| 29 | */ |
| 30 | |
| 31 | |
| 32 | #include <stdio.h> |
| 33 | #include <stdlib.h> |
| 34 | #include <unistd.h> |
| 35 | #include <ftdi.h> |
| 36 | |
| 37 | void ftdi_fatal (struct ftdi_context *ftdi, char *str) |
| 38 | { |
| 39 | fprintf (stderr, "%s: %s\n", |
| 40 | str, ftdi_get_error_string (ftdi)); |
| 41 | ftdi_free(ftdi); |
| 42 | exit (1); |
| 43 | } |
| 44 | |
| 45 | int main(int argc, char **argv) |
| 46 | { |
| 47 | struct ftdi_context *ftdi; |
| 48 | int i, t; |
| 49 | unsigned char data; |
| 50 | int delay = 100000; /* 100 thousand microseconds: 1 tenth of a second */ |
| 51 | |
| 52 | while ((t = getopt (argc, argv, "d:")) != -1) |
| 53 | { |
| 54 | switch (t) |
| 55 | { |
| 56 | case 'd': |
| 57 | delay = atoi (optarg); |
| 58 | break; |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | if ((ftdi = ftdi_new()) == 0) |
| 63 | { |
| 64 | fprintf(stderr, "ftdi_bew failed\n"); |
| 65 | return EXIT_FAILURE; |
| 66 | } |
| 67 | |
| 68 | if (ftdi_usb_open(ftdi, 0x0403, 0x6001) < 0) |
| 69 | ftdi_fatal (ftdi, "Can't open ftdi device"); |
| 70 | |
| 71 | if (ftdi_set_bitmode(ftdi, 0xFF, BITMODE_BITBANG) < 0) |
| 72 | ftdi_fatal (ftdi, "Can't enable bitbang"); |
| 73 | |
| 74 | for (i=optind; i < argc ; i++) |
| 75 | { |
| 76 | sscanf (argv[i], "%x", &t); |
| 77 | data = t; |
| 78 | if (ftdi_write_data(ftdi, &data, 1) < 0) |
| 79 | { |
| 80 | fprintf(stderr,"write failed for 0x%x: %s\n", |
| 81 | data, ftdi_get_error_string(ftdi)); |
| 82 | } |
| 83 | usleep(delay); |
| 84 | } |
| 85 | |
| 86 | ftdi_usb_close(ftdi); |
| 87 | ftdi_free(ftdi); |
| 88 | exit (0); |
| 89 | } |