300 lines
8.9 KiB
C
300 lines
8.9 KiB
C
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/* LIBFTDI EEPROM access example
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This program is distributed under the GPL, version 2
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include <unistd.h>
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#include <getopt.h>
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#include <ftdi.h>
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int read_decode_eeprom(struct ftdi_context *ftdi)
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{
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int i, j, f;
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int value;
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int size;
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unsigned char buf[256];
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f = ftdi_read_eeprom(ftdi);
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if (f < 0)
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{
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fprintf(stderr, "ftdi_read_eeprom: %d (%s)\n",
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f, ftdi_get_error_string(ftdi));
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return -1;
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}
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ftdi_get_eeprom_value(ftdi, CHIP_SIZE, & value);
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if (value <0)
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{
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fprintf(stderr, "No EEPROM found or EEPROM empty\n");
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fprintf(stderr, "On empty EEPROM, use -w option to write default values\n");
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return -1;
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}
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fprintf(stderr, "Chip type %d ftdi_eeprom_size: %d\n", ftdi->type, value);
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if (ftdi->type == TYPE_R)
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size = 0xa0;
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else
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size = value;
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ftdi_get_eeprom_buf(ftdi, buf, size);
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for (i=0; i < size; i += 16)
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{
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fprintf(stdout,"0x%03x:", i);
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for (j = 0; j< 8; j++)
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fprintf(stdout," %02x", buf[i+j]);
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fprintf(stdout," ");
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for (; j< 16; j++)
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fprintf(stdout," %02x", buf[i+j]);
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fprintf(stdout," ");
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for (j = 0; j< 8; j++)
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fprintf(stdout,"%c", isprint(buf[i+j])?buf[i+j]:'.');
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fprintf(stdout," ");
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for (; j< 16; j++)
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fprintf(stdout,"%c", isprint(buf[i+j])?buf[i+j]:'.');
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fprintf(stdout,"\n");
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}
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f = ftdi_eeprom_decode(ftdi, 1);
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if (f < 0)
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{
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fprintf(stderr, "ftdi_eeprom_decode: %d (%s)\n",
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f, ftdi_get_error_string(ftdi));
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return -1;
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}
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return 0;
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}
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int main(int argc, char **argv)
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{
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struct ftdi_context *ftdi;
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int f, i;
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int vid = 0;
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int pid = 0;
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char const *desc = 0;
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char const *serial = 0;
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int erase = 0;
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int use_defaults = 0;
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int large_chip = 0;
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int do_write = 0;
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int retval = 0;
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int value;
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if ((ftdi = ftdi_new()) == 0)
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{
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fprintf(stderr, "Failed to allocate ftdi structure :%s \n",
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ftdi_get_error_string(ftdi));
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return EXIT_FAILURE;
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}
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while ((i = getopt(argc, argv, "d::ev:p:l:P:S:w")) != -1)
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{
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switch (i)
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{
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case 'd':
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use_defaults = 1;
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if (optarg)
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large_chip = 0x66;
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break;
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case 'e':
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erase = 1;
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break;
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case 'v':
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vid = strtoul(optarg, NULL, 0);
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break;
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case 'p':
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pid = strtoul(optarg, NULL, 0);
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break;
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case 'P':
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desc = optarg;
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break;
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case 'S':
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serial = optarg;
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break;
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case 'w':
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do_write = 1;
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break;
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default:
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fprintf(stderr, "usage: %s [options]\n", *argv);
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fprintf(stderr, "\t-d[num] Work with default valuesfor 128 Byte "
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"EEPROM or for 256 Byte EEPROM if some [num] is given\n");
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fprintf(stderr, "\t-w write\n");
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fprintf(stderr, "\t-e erase\n");
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fprintf(stderr, "\t-v verbose decoding\n");
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fprintf(stderr, "\t-p <number> Search for device with PID == number\n");
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fprintf(stderr, "\t-v <number> Search for device with VID == number\n");
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fprintf(stderr, "\t-P <string? Search for device with given "
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"product description\n");
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fprintf(stderr, "\t-S <string? Search for device with given "
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"serial number\n");
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retval = -1;
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goto done;
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}
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}
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// Select first interface
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ftdi_set_interface(ftdi, INTERFACE_ANY);
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if (!vid && !pid && desc == NULL && serial == NULL)
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{
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struct ftdi_device_list *devlist, *curdev;
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int res;
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if ((res = ftdi_usb_find_all(ftdi, &devlist, 0, 0)) < 0)
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{
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fprintf(stderr, "No FTDI with default VID/PID found\n");
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retval = EXIT_FAILURE;
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goto do_deinit;
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}
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if (res > 1)
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{
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int i = 1;
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fprintf(stderr, "%d FTDI devices found: Only Readout on EEPROM done. ",res);
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fprintf(stderr, "Use VID/PID/desc/serial to select device\n");
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for (curdev = devlist; curdev != NULL; curdev= curdev->next, i++)
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{
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f = ftdi_usb_open_dev(ftdi, curdev->dev);
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if (f<0)
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{
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fprintf(stderr, "Unable to open device %d: (%s)",
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i, ftdi_get_error_string(ftdi));
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continue;
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}
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fprintf(stderr, "Decoded values of device %d:\n", i);
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read_decode_eeprom(ftdi);
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ftdi_usb_close(ftdi);
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}
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ftdi_list_free(&devlist);
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retval = EXIT_SUCCESS;
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goto do_deinit;
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}
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else if (res == 1)
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{
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f = ftdi_usb_open_dev(ftdi, devlist[0].dev);
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if (f<0)
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{
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fprintf(stderr, "Unable to open device %d: (%s)",
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i, ftdi_get_error_string(ftdi));
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}
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}
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else
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{
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fprintf(stderr, "No devices found\n");
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f = 0;
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}
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ftdi_list_free(&devlist);
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}
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else
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{
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// Open device
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f = ftdi_usb_open_desc(ftdi, vid, pid, desc, serial);
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if (f < 0)
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{
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fprintf(stderr, "Device VID 0x%04x PID 0x%04x", vid, pid);
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if (desc)
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fprintf(stderr, " Desc %s", desc);
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if (serial)
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fprintf(stderr, " Serial %s", serial);
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fprintf(stderr, "\n");
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fprintf(stderr, "unable to open ftdi device: %d (%s)\n",
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f, ftdi_get_error_string(ftdi));
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retval = -1;
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goto done;
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}
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}
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if (erase)
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{
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f = ftdi_erase_eeprom(ftdi); /* needed to determine EEPROM chip type */
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if (f < 0)
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{
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fprintf(stderr, "Erase failed: %s",
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ftdi_get_error_string(ftdi));
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retval = -2;
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goto done;
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}
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if (ftdi_get_eeprom_value(ftdi, CHIP_TYPE, & value) <0)
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{
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fprintf(stderr, "ftdi_get_eeprom_value: %d (%s)\n",
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f, ftdi_get_error_string(ftdi));
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}
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if (value == -1)
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fprintf(stderr, "No EEPROM\n");
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else if (value == 0)
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fprintf(stderr, "Internal EEPROM\n");
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else
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fprintf(stderr, "Found 93x%02x\n", value);
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retval = 0;
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goto done;
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}
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if (use_defaults)
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{
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ftdi_eeprom_initdefaults(ftdi, NULL, NULL, NULL);
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if (ftdi_set_eeprom_value(ftdi, MAX_POWER, 500) <0)
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{
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fprintf(stderr, "ftdi_set_eeprom_value: %d (%s)\n",
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f, ftdi_get_error_string(ftdi));
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}
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if (large_chip)
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if (ftdi_set_eeprom_value(ftdi, CHIP_TYPE, 0x66) <0)
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{
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fprintf(stderr, "ftdi_set_eeprom_value: %d (%s)\n",
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f, ftdi_get_error_string(ftdi));
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}
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f=(ftdi_eeprom_build(ftdi));
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if (f < 0)
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{
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fprintf(stderr, "ftdi_eeprom_build: %d (%s)\n",
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f, ftdi_get_error_string(ftdi));
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retval = -1;
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goto done;
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}
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}
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else if (do_write)
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{
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ftdi_eeprom_initdefaults(ftdi, NULL, NULL, NULL);
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f = ftdi_erase_eeprom(ftdi);
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if (ftdi_set_eeprom_value(ftdi, MAX_POWER, 500) <0)
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{
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fprintf(stderr, "ftdi_set_eeprom_value: %d (%s)\n",
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f, ftdi_get_error_string(ftdi));
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}
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f = ftdi_erase_eeprom(ftdi);/* needed to determine EEPROM chip type */
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if (ftdi_get_eeprom_value(ftdi, CHIP_TYPE, & value) <0)
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{
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fprintf(stderr, "ftdi_get_eeprom_value: %d (%s)\n",
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f, ftdi_get_error_string(ftdi));
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}
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if (value == -1)
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fprintf(stderr, "No EEPROM\n");
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else if (value == 0)
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fprintf(stderr, "Internal EEPROM\n");
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else
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fprintf(stderr, "Found 93x%02x\n", value);
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f=(ftdi_eeprom_build(ftdi));
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if (f < 0)
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{
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fprintf(stderr, "Erase failed: %s",
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ftdi_get_error_string(ftdi));
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retval = -2;
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goto done;
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}
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f = ftdi_write_eeprom(ftdi);
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{
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fprintf(stderr, "ftdi_eeprom_decode: %d (%s)\n",
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f, ftdi_get_error_string(ftdi));
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retval = 1;
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goto done;
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}
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}
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retval = read_decode_eeprom(ftdi);
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done:
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ftdi_usb_close(ftdi);
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do_deinit:
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ftdi_free(ftdi);
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return retval;
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}
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