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annotate cp2102/read_eeprom_main.c @ 70:09da7db45dce

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doc/FTDI-EEPROM-format: document FT232R specifics
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 24 Sep 2023 21:31:37 +0000
parents d4d3531d342a
children a378bf95c26c
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d4d3531d342a cp2102-read-eeprom program written, compiles
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1 /*
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2 * This program locates a CP2102 device via libusb, reads its internal
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3 * 1024-byte EEPROM and emits (on stdout) an image of this EEPROM
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4 * in the same Intel HEX format as used by cp210x-program-1.0,
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5 * the Python-language tool from 2014.
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6 */
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7
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8 #include <sys/types.h>
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9 #include <string.h>
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10 #include <strings.h>
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11 #include <stdio.h>
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12 #include <stdlib.h>
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13 #include <unistd.h>
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14 #include <usb.h>
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15 #include "../libuwrap/find_dev.h"
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16 #include "cp210x_defs.h"
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17
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18 u_char eeprom[SIZE_EEPROM];
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19
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20 main(argc, argv)
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21 char **argv;
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22 {
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23 struct usb_device *dev;
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24 usb_dev_handle *usbh;
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25
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26 if (argc != 2) {
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27 fprintf(stderr, "usage: %s device-selector\n", argv[0]);
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28 exit(1);
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29 }
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30 dev = find_usbdev_by_desc_string(argv[1]);
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31 if (!dev) {
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32 fprintf(stderr, "error: specified USB device not found\n");
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33 exit(1);
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34 }
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35 usbh = usb_open(dev);
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36 if (!usbh) {
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37 fprintf(stderr, "error: usb_open() failed\n");
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38 exit(1);
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39 }
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40 read_eeprom(usbh);
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41 usb_close(usbh);
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42 intel_hex_out(eeprom, stdout);
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43 exit(0);
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44 }