1 /* LIBFTDI EEPROM access example
3 This program is distributed under the GPL, version 2
14 int read_decode_eeprom(struct ftdi_context *ftdi)
19 unsigned char buf[256];
21 f = ftdi_read_eeprom(ftdi);
24 fprintf(stderr, "ftdi_read_eeprom: %d (%s)\n",
25 f, ftdi_get_error_string(ftdi));
30 ftdi_get_eeprom_value(ftdi, CHIP_SIZE, & value);
33 fprintf(stderr, "No EEPROM found or EEPROM empty\n");
34 fprintf(stderr, "On empty EEPROM, use -w option to write default values\n");
37 fprintf(stderr, "Chip type %d ftdi_eeprom_size: %d\n", ftdi->type, value);
38 if (ftdi->type == TYPE_R)
42 ftdi_get_eeprom_buf(ftdi, buf, size);
43 for (i=0; i < size; i += 16)
45 fprintf(stdout,"0x%03x:", i);
47 for (j = 0; j< 8; j++)
48 fprintf(stdout," %02x", buf[i+j]);
51 fprintf(stdout," %02x", buf[i+j]);
53 for (j = 0; j< 8; j++)
54 fprintf(stdout,"%c", isprint(buf[i+j])?buf[i+j]:'.');
57 fprintf(stdout,"%c", isprint(buf[i+j])?buf[i+j]:'.');
61 f = ftdi_eeprom_decode(ftdi, 1);
64 fprintf(stderr, "ftdi_eeprom_decode: %d (%s)\n",
65 f, ftdi_get_error_string(ftdi));
71 int main(int argc, char **argv)
73 struct ftdi_context *ftdi;
78 char const *serial = 0;
86 if ((ftdi = ftdi_new()) == 0)
88 fprintf(stderr, "Failed to allocate ftdi structure :%s \n",
89 ftdi_get_error_string(ftdi));
93 while ((i = getopt(argc, argv, "d::ev:p:l:P:S:w")) != -1)
106 vid = strtoul(optarg, NULL, 0);
109 pid = strtoul(optarg, NULL, 0);
121 fprintf(stderr, "usage: %s [options]\n", *argv);
122 fprintf(stderr, "\t-d[num] Work with default valuesfor 128 Byte "
123 "EEPROM or for 256 Byte EEPROM if some [num] is given\n");
124 fprintf(stderr, "\t-w write\n");
125 fprintf(stderr, "\t-e erase\n");
126 fprintf(stderr, "\t-v verbose decoding\n");
127 fprintf(stderr, "\t-p <number> Search for device with PID == number\n");
128 fprintf(stderr, "\t-v <number> Search for device with VID == number\n");
129 fprintf(stderr, "\t-P <string? Search for device with given "
130 "product description\n");
131 fprintf(stderr, "\t-S <string? Search for device with given "
138 // Select first interface
139 ftdi_set_interface(ftdi, INTERFACE_ANY);
141 if (!vid && !pid && desc == NULL && serial == NULL)
143 struct ftdi_device_list *devlist, *curdev;
145 if ((res = ftdi_usb_find_all(ftdi, &devlist, 0, 0)) < 0)
147 fprintf(stderr, "No FTDI with default VID/PID found\n");
148 retval = EXIT_FAILURE;
154 fprintf(stderr, "%d FTDI devices found: Only Readout on EEPROM done. ",res);
155 fprintf(stderr, "Use VID/PID/desc/serial to select device\n");
156 for (curdev = devlist; curdev != NULL; curdev= curdev->next, i++)
158 f = ftdi_usb_open_dev(ftdi, curdev->dev);
161 fprintf(stderr, "Unable to open device %d: (%s)",
162 i, ftdi_get_error_string(ftdi));
165 fprintf(stderr, "Decoded values of device %d:\n", i);
166 read_decode_eeprom(ftdi);
167 ftdi_usb_close(ftdi);
169 ftdi_list_free(&devlist);
170 retval = EXIT_SUCCESS;
175 f = ftdi_usb_open_dev(ftdi, devlist[0].dev);
178 fprintf(stderr, "Unable to open device %d: (%s)",
179 i, ftdi_get_error_string(ftdi));
184 fprintf(stderr, "No devices found\n");
187 ftdi_list_free(&devlist);
192 f = ftdi_usb_open_desc(ftdi, vid, pid, desc, serial);
195 fprintf(stderr, "Device VID 0x%04x PID 0x%04x", vid, pid);
197 fprintf(stderr, " Desc %s", desc);
199 fprintf(stderr, " Serial %s", serial);
200 fprintf(stderr, "\n");
201 fprintf(stderr, "unable to open ftdi device: %d (%s)\n",
202 f, ftdi_get_error_string(ftdi));
210 f = ftdi_erase_eeprom(ftdi); /* needed to determine EEPROM chip type */
213 fprintf(stderr, "Erase failed: %s",
214 ftdi_get_error_string(ftdi));
218 if (ftdi_get_eeprom_value(ftdi, CHIP_TYPE, & value) <0)
220 fprintf(stderr, "ftdi_get_eeprom_value: %d (%s)\n",
221 f, ftdi_get_error_string(ftdi));
224 fprintf(stderr, "No EEPROM\n");
226 fprintf(stderr, "Internal EEPROM\n");
228 fprintf(stderr, "Found 93x%02x\n", value);
235 ftdi_eeprom_initdefaults(ftdi, NULL, NULL, NULL);
236 if (ftdi_set_eeprom_value(ftdi, MAX_POWER, 500) <0)
238 fprintf(stderr, "ftdi_set_eeprom_value: %d (%s)\n",
239 f, ftdi_get_error_string(ftdi));
242 if (ftdi_set_eeprom_value(ftdi, CHIP_TYPE, 0x66) <0)
244 fprintf(stderr, "ftdi_set_eeprom_value: %d (%s)\n",
245 f, ftdi_get_error_string(ftdi));
247 f=(ftdi_eeprom_build(ftdi));
250 fprintf(stderr, "ftdi_eeprom_build: %d (%s)\n",
251 f, ftdi_get_error_string(ftdi));
258 ftdi_eeprom_initdefaults(ftdi, NULL, NULL, NULL);
259 f = ftdi_erase_eeprom(ftdi);
260 if (ftdi_set_eeprom_value(ftdi, MAX_POWER, 500) <0)
262 fprintf(stderr, "ftdi_set_eeprom_value: %d (%s)\n",
263 f, ftdi_get_error_string(ftdi));
265 f = ftdi_erase_eeprom(ftdi);/* needed to determine EEPROM chip type */
266 if (ftdi_get_eeprom_value(ftdi, CHIP_TYPE, & value) <0)
268 fprintf(stderr, "ftdi_get_eeprom_value: %d (%s)\n",
269 f, ftdi_get_error_string(ftdi));
272 fprintf(stderr, "No EEPROM\n");
274 fprintf(stderr, "Internal EEPROM\n");
276 fprintf(stderr, "Found 93x%02x\n", value);
277 f=(ftdi_eeprom_build(ftdi));
280 fprintf(stderr, "Erase failed: %s",
281 ftdi_get_error_string(ftdi));
285 f = ftdi_write_eeprom(ftdi);
287 fprintf(stderr, "ftdi_eeprom_decode: %d (%s)\n",
288 f, ftdi_get_error_string(ftdi));
293 retval = read_decode_eeprom(ftdi);
295 ftdi_usb_close(ftdi);