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annotate cp2102/decode_usb_desc.c @ 86:b7397959ae68

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cp2102-decode-ee-desc: show bMaxPacketSize0 in decimal
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 27 Sep 2023 18:46:10 +0000
parents 0787525a33e2
children 4393e1b4b245
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1 /*
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2 * This program reads a CP2102 EEPROM image from an Intel HEX file
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3 * and decodes the USB descriptors portion thereof.
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4 */
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5
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6 #include <sys/types.h>
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7 #include <stdio.h>
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8 #include <stdlib.h>
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9 #include "cp210x_defs.h"
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10
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11 u_char eeprom[SIZE_EEPROM];
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12
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13 main(argc, argv)
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14 char **argv;
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15 {
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16 if (argc != 2) {
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17 fprintf(stderr, "usage: %s ihex-file\n", argv[0]);
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18 exit(1);
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19 }
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20 read_intel_hex(argv[1]);
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21 printf("USB device descriptor at 0x3988:\n");
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22 printf(" bLength: %u", eeprom[0x388]);
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23 if (eeprom[0x388] != 18)
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24 fputs(" (WRONG!)", stdout);
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25 putchar('\n');
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26 printf(" bDescriptorType: 0x%02X", eeprom[0x389]);
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27 if (eeprom[0x389] != 0x01)
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28 fputs(" (WRONG!)", stdout);
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29 putchar('\n');
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30 printf(" bcdUSB: 0x%02X%02X\n",
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31 eeprom[0x38B], eeprom[0x38A]);
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32 printf(" bDeviceClass: 0x%02X\n", eeprom[0x38C]);
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33 printf(" bDeviceSubClass: 0x%02X\n", eeprom[0x38D]);
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34 printf(" bDeviceProtocol: 0x%02X\n", eeprom[0x38E]);
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35 printf(" bMaxPacketSize0: %u\n", eeprom[0x38F]);
85
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36 printf(" idVendor: 0x%02X%02X\n",
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37 eeprom[0x391], eeprom[0x390]);
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38 printf(" idProduct: 0x%02X%02X\n",
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39 eeprom[0x393], eeprom[0x392]);
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40 printf(" bcdDevice: 0x%02X%02X\n",
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41 eeprom[0x395], eeprom[0x394]);
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42 printf(" iManufacturer: %u\n", eeprom[0x396]);
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43 printf(" iProduct: %u\n", eeprom[0x397]);
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44 printf(" iSerialNumber: %u\n", eeprom[0x398]);
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45 printf(" bNumConfigurations: %u\n", eeprom[0x399]);
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46 /* decoding of other descriptors remains to be implemented */
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47 exit(0);
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48 }