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annotate cp2102/read_eeprom_main.c @ 107:bc3367755586 default tip

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author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 21 Nov 2023 22:11:09 +0000
parents 1cacc1ae56f0
children
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d4d3531d342a cp2102-read-eeprom program written, compiles
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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 and writes (into a file) an image of this EEPROM
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4 * in the same Intel HEX format as used by cp210x-program-1.0,
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5 * the Python-language tool from 2014.
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6 */
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7
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8 #include <sys/types.h>
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9 #include <string.h>
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10 #include <strings.h>
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11 #include <stdio.h>
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12 #include <stdlib.h>
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13 #include <unistd.h>
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14 #include <usb.h>
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15 #include "../libuwrap/find_dev.h"
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16 #include "cp210x_defs.h"
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17
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18 extern struct usb_device *find_cp2102_device();
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19
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20 u_char eeprom[SIZE_EEPROM];
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21 char *device_selector, *outfilename;
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22
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23 process_cmdline(argc, argv)
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24 char **argv;
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25 {
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26 int c;
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27 extern int optind;
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28 extern char *optarg;
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29
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30 while ((c = getopt(argc, argv, "d:")) != EOF) {
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31 switch (c) {
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32 case 'd':
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33 device_selector = optarg;
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34 continue;
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35 default:
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36 usage:
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37 fprintf(stderr,
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38 "usage: %s [-d device-selector] output-hex-file\n",
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39 argv[0]);
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40 exit(1);
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41 }
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42 }
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43 if (argc != optind + 1)
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44 goto usage;
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45 outfilename = argv[optind];
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46 }
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47
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48 main(argc, argv)
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49 char **argv;
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50 {
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51 struct usb_device *dev;
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52 usb_dev_handle *usbh;
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53 FILE *outf;
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54
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55 process_cmdline(argc, argv);
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56 dev = find_cp2102_device(device_selector);
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57 usbh = usb_open(dev);
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58 if (!usbh) {
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59 fprintf(stderr, "error: usb_open() failed\n");
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60 exit(1);
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61 }
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62 read_eeprom(usbh);
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63 usb_close(usbh);
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64 outf = fopen(outfilename, "w");
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65 if (!outf) {
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66 perror(outfilename);
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67 exit(1);
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68 }
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69 intel_hex_out(eeprom, outf);
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70 fclose(outf);
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71 exit(0);
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72 }