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annotate cp2102/read_baudtab.c @ 67:742c41f44658

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doc/FTDI-chip-ID: new article
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 13 Sep 2023 00:43:14 +0000
parents ae8075bcc029
children 8d35346f1d46
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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, decodes the baud rate table portion thereof
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4 * and prints the decoded table.
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5 */
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6
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7 #include <sys/types.h>
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8 #include <string.h>
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9 #include <strings.h>
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10 #include <stdio.h>
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11 #include <stdlib.h>
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12 #include <unistd.h>
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13 #include <usb.h>
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14 #include "../libuwrap/find_dev.h"
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15 #include "cp210x_defs.h"
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16
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17 u_char eeprom[SIZE_EEPROM];
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18
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19 main(argc, argv)
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20 char **argv;
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21 {
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22 struct usb_device *dev;
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23 usb_dev_handle *usbh;
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24
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25 if (argc != 2) {
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26 fprintf(stderr, "usage: %s device-selector\n", argv[0]);
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27 exit(1);
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28 }
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29 dev = find_usbdev_by_desc_string(argv[1]);
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30 if (!dev) {
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31 fprintf(stderr, "error: specified USB device not found\n");
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32 exit(1);
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33 }
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34 usbh = usb_open(dev);
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35 if (!usbh) {
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36 fprintf(stderr, "error: usb_open() failed\n");
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37 exit(1);
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38 }
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39 read_eeprom(usbh);
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40 usb_close(usbh);
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41 decode_baud_table(stdout);
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42 exit(0);
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43 }