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annotate cp2102/read_baudtab.c @ 101:ba741a1af0e3

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doc/CP2102-EEPROM-tools: article started
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 28 Sep 2023 06:35:39 +0000
parents 1cacc1ae56f0
children
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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 extern struct usb_device *find_cp2102_device();
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18
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19 u_char eeprom[SIZE_EEPROM];
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20 char *device_selector;
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21
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22 process_cmdline(argc, argv)
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23 char **argv;
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24 {
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25 int c;
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26 extern int optind;
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27 extern char *optarg;
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28
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29 while ((c = getopt(argc, argv, "d:")) != EOF) {
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30 switch (c) {
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31 case 'd':
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32 device_selector = optarg;
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33 continue;
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34 default:
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35 usage:
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36 fprintf(stderr, "usage: %s [-d device-selector]\n",
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37 argv[0]);
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38 exit(1);
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39 }
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40 }
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41 if (argc != optind)
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42 goto usage;
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43 }
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44
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45 main(argc, argv)
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46 char **argv;
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47 {
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48 struct usb_device *dev;
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49 usb_dev_handle *usbh;
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50
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51 process_cmdline(argc, argv);
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52 dev = find_cp2102_device(device_selector);
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53 usbh = usb_open(dev);
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54 if (!usbh) {
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55 fprintf(stderr, "error: usb_open() failed\n");
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56 exit(1);
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57 }
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58 read_eeprom(usbh);
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59 usb_close(usbh);
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60 decode_baud_table(stdout);
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61 exit(0);
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62 }