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comparison cp2102/decode_usb_desc.c @ 85:0787525a33e2

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cp2102-decode-ee-desc program started
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 27 Sep 2023 18:43:14 +0000
parents
children b7397959ae68
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84:b36397a56bda 85:0787525a33e2
1 /*
2 * This program reads a CP2102 EEPROM image from an Intel HEX file
3 * and decodes the USB descriptors portion thereof.
4 */
5
6 #include <sys/types.h>
7 #include <stdio.h>
8 #include <stdlib.h>
9 #include "cp210x_defs.h"
10
11 u_char eeprom[SIZE_EEPROM];
12
13 main(argc, argv)
14 char **argv;
15 {
16 if (argc != 2) {
17 fprintf(stderr, "usage: %s ihex-file\n", argv[0]);
18 exit(1);
19 }
20 read_intel_hex(argv[1]);
21 printf("USB device descriptor at 0x3988:\n");
22 printf(" bLength: %u", eeprom[0x388]);
23 if (eeprom[0x388] != 18)
24 fputs(" (WRONG!)", stdout);
25 putchar('\n');
26 printf(" bDescriptorType: 0x%02X", eeprom[0x389]);
27 if (eeprom[0x389] != 0x01)
28 fputs(" (WRONG!)", stdout);
29 putchar('\n');
30 printf(" bcdUSB: 0x%02X%02X\n",
31 eeprom[0x38B], eeprom[0x38A]);
32 printf(" bDeviceClass: 0x%02X\n", eeprom[0x38C]);
33 printf(" bDeviceSubClass: 0x%02X\n", eeprom[0x38D]);
34 printf(" bDeviceProtocol: 0x%02X\n", eeprom[0x38E]);
35 printf(" bMaxPacketSize0: 0x%02X\n", eeprom[0x38F]);
36 printf(" idVendor: 0x%02X%02X\n",
37 eeprom[0x391], eeprom[0x390]);
38 printf(" idProduct: 0x%02X%02X\n",
39 eeprom[0x393], eeprom[0x392]);
40 printf(" bcdDevice: 0x%02X%02X\n",
41 eeprom[0x395], eeprom[0x394]);
42 printf(" iManufacturer: %u\n", eeprom[0x396]);
43 printf(" iProduct: %u\n", eeprom[0x397]);
44 printf(" iSerialNumber: %u\n", eeprom[0x398]);
45 printf(" bNumConfigurations: %u\n", eeprom[0x399]);
46 /* decoding of other descriptors remains to be implemented */
47 exit(0);
48 }