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comparison cp2102/decode_usb_desc.c @ 87:4393e1b4b245

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cp2102-decode-ee-desc: decode config descriptor
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 27 Sep 2023 19:15:29 +0000
parents b7397959ae68
children ea7b411aad27
comparison
equal deleted inserted replaced
86:b7397959ae68 87:4393e1b4b245
8 #include <stdlib.h> 8 #include <stdlib.h>
9 #include "cp210x_defs.h" 9 #include "cp210x_defs.h"
10 10
11 u_char eeprom[SIZE_EEPROM]; 11 u_char eeprom[SIZE_EEPROM];
12 12
13 static void
14 print_device_desc(desc)
15 u_char *desc;
16 {
17 printf(" bLength: %u", desc[0]);
18 if (desc[0] != 18)
19 fputs(" (WRONG!)", stdout);
20 putchar('\n');
21 printf(" bDescriptorType: 0x%02X", desc[1]);
22 if (desc[1] != 0x01)
23 fputs(" (WRONG!)", stdout);
24 putchar('\n');
25 printf(" bcdUSB: 0x%02X%02X\n", desc[3], desc[2]);
26 printf(" bDeviceClass: 0x%02X\n", desc[4]);
27 printf(" bDeviceSubClass: 0x%02X\n", desc[5]);
28 printf(" bDeviceProtocol: 0x%02X\n", desc[6]);
29 printf(" bMaxPacketSize0: %u\n", desc[7]);
30 printf(" idVendor: 0x%02X%02X\n", desc[9], desc[8]);
31 printf(" idProduct: 0x%02X%02X\n", desc[11], desc[10]);
32 printf(" bcdDevice: 0x%02X%02X\n", desc[13], desc[12]);
33 printf(" iManufacturer: %u\n", desc[14]);
34 printf(" iProduct: %u\n", desc[15]);
35 printf(" iSerialNumber: %u\n", desc[16]);
36 printf(" bNumConfigurations: %u\n", desc[17]);
37 }
38
39 static void
40 print_config_desc(desc)
41 u_char *desc;
42 {
43 printf(" bLength: %u", desc[0]);
44 if (desc[0] != 9)
45 fputs(" (WRONG!)", stdout);
46 putchar('\n');
47 printf(" bDescriptorType: 0x%02X", desc[1]);
48 if (desc[1] != 0x02)
49 fputs(" (WRONG!)", stdout);
50 putchar('\n');
51 printf(" wTotalLength: %u\n", desc[2] | (desc[3] << 8));
52 printf(" bNumInterfaces: %u\n", desc[4]);
53 printf(" bConfigurationValue: 0x%02X\n", desc[5]);
54 printf(" iConfiguration: %u\n", desc[6]);
55 printf(" bmAttributes: 0x%02X\n", desc[7]);
56 printf(" bMaxPower: 0x%02X (%u mA)\n", desc[8], desc[8] * 2);
57 }
58
13 main(argc, argv) 59 main(argc, argv)
14 char **argv; 60 char **argv;
15 { 61 {
16 if (argc != 2) { 62 if (argc != 2) {
17 fprintf(stderr, "usage: %s ihex-file\n", argv[0]); 63 fprintf(stderr, "usage: %s ihex-file\n", argv[0]);
18 exit(1); 64 exit(1);
19 } 65 }
20 read_intel_hex(argv[1]); 66 read_intel_hex(argv[1]);
21 printf("USB device descriptor at 0x3988:\n"); 67 printf("USB device descriptor at 0x3988:\n");
22 printf(" bLength: %u", eeprom[0x388]); 68 print_device_desc(eeprom + 0x388);
23 if (eeprom[0x388] != 18) 69 printf("USB configuration descriptor at 0x399A:\n");
24 fputs(" (WRONG!)", stdout); 70 print_config_desc(eeprom + 0x39A);
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: %u\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 */ 71 /* decoding of other descriptors remains to be implemented */
47 exit(0); 72 exit(0);
48 } 73 }