FreeCalypso > hg > fc-usbser-tools

annotate fteeprom/fteeprom-erase.c @ 69:065f68a94b6b

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doc/FTDI-EEPROM-format: beginning of article
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 14 Sep 2023 23:56:25 +0000
parents 5cbde3c80c24
children
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1 /*
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2 * This program connects to an FTDI chip via libusb and commands that FTDI
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3 * chip to erase its EEPROM in one fell swoop. This operation is known
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4 * to work on FT2232C/D chips with 5V-powered EEPROMs, but is NOT appropriate
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5 * for FT232R. This operation is also not recommended for external EEPROMs
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6 * powered with 3.3V, as typically used with FT2232H.
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7 *
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8 * The present version has been converted to use our local libraries
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9 * (libftmini and libuwrap) instead of libftdi - thus the external dependency
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10 * is only libusb.
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11 */
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12
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13 #include <sys/types.h>
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14 #include <stdio.h>
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15 #include <stdlib.h>
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16 #include <unistd.h>
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17 #include <usb.h>
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18 #include "../libuwrap/find_dev.h"
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19 #include "../libuwrap/open_close.h"
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20 #include "../libftmini/eeprom_func.h"
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22 char *device_selector;
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23 int no_detach;
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24
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25 process_cmdline(argc, argv)
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26 char **argv;
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27 {
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28 int c;
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29 extern int optind;
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30 extern char *optarg;
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31
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32 while ((c = getopt(argc, argv, "n")) != EOF) {
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33 switch (c) {
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34 case 'n':
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35 no_detach = 1;
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36 continue;
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37 default:
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38 /* error msg already printed */
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39 exit(1);
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40 }
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41 }
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42 if (argc != optind + 1) {
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43 fprintf(stderr, "usage: %s [options] device-selector\n",
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44 argv[0]);
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45 exit(1);
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46 }
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47 device_selector = argv[optind];
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48 }
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49
0
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50 main(argc, argv)
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51 char **argv;
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52 {
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53 struct usb_device *dev;
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54 usb_dev_handle *usbh;
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56 process_cmdline(argc, argv);
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57 dev = find_usbdev_by_desc_string(device_selector);
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58 if (!dev) {
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59 fprintf(stderr, "error: specified USB device not found\n");
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60 exit(1);
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61 }
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62 usbh = usb_open(dev);
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63 if (!usbh) {
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64 fprintf(stderr, "error: usb_open() failed\n");
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65 exit(1);
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66 }
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67 if (!no_detach)
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68 usbwrap_claim_all_ifs(usbh);
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69 ftmini_erase_eeprom(usbh);
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70 usb_close(usbh);
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71 exit(0);
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72 }