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comparison cp2102/update_eeprom.c @ 99:c59011177e2e

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cp2102-update-eeprom program written, compiles
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 28 Sep 2023 05:25:39 +0000
parents cp2102/write_eeprom_main.c@1cacc1ae56f0
children
comparison
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98:1cacc1ae56f0 99:c59011177e2e
1 /*
2 * This program locates a CP2102 device via libusb, reads its internal EEPROM,
3 * applies user-requested patches to the EEPROM image, and then reprograms
4 * the physical EEPROM with the patched version.
5 */
6
7 #include <sys/types.h>
8 #include <string.h>
9 #include <strings.h>
10 #include <stdio.h>
11 #include <stdlib.h>
12 #include <unistd.h>
13 #include <usb.h>
14 #include "../libuwrap/find_dev.h"
15 #include "../libuwrap/open_close.h"
16 #include "cp210x_defs.h"
17
18 extern struct usb_device *find_cp2102_device();
19
20 u_char eeprom[SIZE_EEPROM];
21 char *device_selector, *baud_change;
22 int no_detach;
23
24 process_cmdline(argc, argv)
25 char **argv;
26 {
27 int c;
28 extern int optind;
29 extern char *optarg;
30
31 while ((c = getopt(argc, argv, "b:d:n")) != EOF) {
32 switch (c) {
33 case 'b':
34 baud_change = optarg;
35 continue;
36 case 'd':
37 device_selector = optarg;
38 continue;
39 case 'n':
40 no_detach = 1;
41 continue;
42 default:
43 usage:
44 fprintf(stderr,
45 "usage: %s [hw-options] eeprom-changes\n",
46 argv[0]);
47 exit(1);
48 }
49 }
50 if (argc == optind && !baud_change)
51 goto usage;
52 }
53
54 main(argc, argv)
55 char **argv;
56 {
57 struct usb_device *dev;
58 usb_dev_handle *usbh;
59 extern int optind;
60
61 process_cmdline(argc, argv);
62 dev = find_cp2102_device(device_selector);
63 usbh = usb_open(dev);
64 if (!usbh) {
65 fprintf(stderr, "error: usb_open() failed\n");
66 exit(1);
67 }
68 read_eeprom(usbh);
69 if (baud_change)
70 apply_eeprom_patch_baud(baud_change);
71 for (; optind < argc; optind++)
72 apply_eeprom_patch_file(argv[optind]);
73 if (!no_detach)
74 usbwrap_claim_all_ifs(usbh);
75 write_eeprom(usbh);
76 usb_close(usbh);
77 exit(0);
78 }