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annotate fteeprom/fteeprom-prog.c @ 41:79cdd210abe1

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eeproms/usb-com232-plus2: read out of an FTDI USB-COM232-PLUS2 board
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 22 Apr 2019 00:19:13 +0000
parents 16b625911e19
children c4b9026c8875
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31
16b625911e19 fteeprom: generalization of previous ee2232 tools
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1 #include <sys/types.h>
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2 #include <ctype.h>
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3 #include <string.h>
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4 #include <strings.h>
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5 #include <stdio.h>
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6 #include <stdlib.h>
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7 #include <unistd.h>
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8 #include <ftdi.h>
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9
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10 char *device_selector;
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11 unsigned eeprom_size = 64;
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12 u_short eeprom[256];
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13 int erase;
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14
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15 process_cmdline(argc, argv)
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16 char **argv;
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17 {
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18 int c;
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19 extern int optind;
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20 extern char *optarg;
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21
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22 while ((c = getopt(argc, argv, "et:")) != EOF) {
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23 switch (c) {
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24 case 'e':
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25 erase = 1;
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26 continue;
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27 case 't':
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28 if (!strcmp(optarg, "46"))
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29 eeprom_size = 64;
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30 else if (!strcmp(optarg, "56"))
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31 eeprom_size = 128;
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32 else if (!strcmp(optarg, "66"))
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33 eeprom_size = 256;
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34 else {
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35 fprintf(stderr,
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36 "error: -t option invalid value \"%s\"\n",
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37 optarg);
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38 exit(1);
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39 }
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40 continue;
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41 default:
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42 /* error msg already printed */
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43 exit(1);
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44 }
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45 }
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46 if (argc != optind + 1) {
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47 fprintf(stderr, "usage: %s [options] device-selector\n",
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48 argv[0]);
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49 exit(1);
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50 }
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51 device_selector = argv[optind];
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52 }
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53
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54 read_eeprom_from_stdin()
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55 {
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56 unsigned n, off;
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57 int rc;
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58
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59 for (n = 0; n < eeprom_size; n += 8) {
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60 rc = scanf("%x: %hx %hx %hx %hx %hx %hx %hx %hx", &off,
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61 eeprom + n, eeprom + n + 1, eeprom + n + 2,
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62 eeprom + n + 3, eeprom + n + 4, eeprom + n + 5,
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63 eeprom + n + 6, eeprom + n + 7);
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64 if (rc != 9 || off != n * 2) {
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65 fprintf(stderr,
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66 "ee2232-prog error: invalid input on stdin\n");
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67 exit(1);
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68 }
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69 }
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70 }
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71
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72 main(argc, argv)
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73 char **argv;
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74 {
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75 struct ftdi_context ftdi;
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76 unsigned n;
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77
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78 process_cmdline(argc, argv);
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79 if (erase)
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80 memset(eeprom, 0xFF, eeprom_size * 2);
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81 else
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82 read_eeprom_from_stdin();
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83 ftdi_init(&ftdi);
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84 if (ftdi_usb_open_string(&ftdi, device_selector) < 0) {
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85 fprintf(stderr, "FTDI USB open failed: %s\n", ftdi.error_str);
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86 exit(1);
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87 }
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88 for (n = 0; n < eeprom_size; n++) {
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89 if (ftdi_write_eeprom_location(&ftdi, n, eeprom[n]) < 0) {
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90 fprintf(stderr, "EEPROM write error: %s\n",
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91 ftdi.error_str);
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92 exit(1);
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93 }
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94 }
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95 ftdi_usb_close(&ftdi);
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96 exit(0);
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97 }