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\n");
36 fprintf(stderr, "Chip type %d ftdi_eeprom_size: %d\n", ftdi->type, value);
37 if (ftdi->type == TYPE_R)
41 ftdi_get_eeprom_buf(ftdi, buf, size);
42 for (i=0; i < size; i += 16)
44 fprintf(stdout,"0x%03x:", i);
46 for (j = 0; j< 8; j++)
47 fprintf(stdout," %02x", buf[i+j]);
50 fprintf(stdout," %02x", buf[i+j]);
52 for (j = 0; j< 8; j++)
53 fprintf(stdout,"%c", isprint(buf[i+j])?buf[i+j]:'.');
56 fprintf(stdout,"%c", isprint(buf[i+j])?buf[i+j]:'.');
60 f = ftdi_eeprom_decode(ftdi, 1);
63 fprintf(stderr, "ftdi_eeprom_decode: %d (%s)\n",
64 f, ftdi_get_error_string(ftdi));
70 int main(int argc, char **argv)
72 struct ftdi_context *ftdi;
77 char const *serial = 0;
85 if ((ftdi = ftdi_new()) == 0)
87 fprintf(stderr, "Failed to allocate ftdi structure :%s \n",
88 ftdi_get_error_string(ftdi));
92 while ((i = getopt(argc, argv, "d::ev:p:l:P:S:w")) != -1)
105 vid = strtoul(optarg, NULL, 0);
108 pid = strtoul(optarg, NULL, 0);
120 fprintf(stderr, "usage: %s [options]\n", *argv);
121 fprintf(stderr, "\t-d[num] Work with default valuesfor 128 Byte "
122 "EEPROM or for 256 Byte EEPROM if some [num] is given\n");
123 fprintf(stderr, "\t-w write\n");
124 fprintf(stderr, "\t-e erase\n");
125 fprintf(stderr, "\t-v verbose decoding\n");
126 fprintf(stderr, "\t-p <number> Search for device with PID == number\n");
127 fprintf(stderr, "\t-v <number> Search for device with VID == number\n");
128 fprintf(stderr, "\t-P <string? Search for device with given "
129 "product description\n");
130 fprintf(stderr, "\t-S <string? Search for device with given "
137 // Select first interface
138 ftdi_set_interface(ftdi, INTERFACE_ANY);
140 if (!vid && !pid && desc == NULL && serial == NULL)
142 struct ftdi_device_list *devlist, *curdev;
144 if ((res = ftdi_usb_find_all(ftdi, &devlist, 0, 0)) < 0)
146 fprintf(stderr, "No FTDI with default VID/PID found\n");
147 retval = EXIT_FAILURE;
153 fprintf(stderr, "%d FTDI devices found: Only Readout on EEPROM done. ",res);
154 fprintf(stderr, "Use VID/PID/desc/serial to select device\n");
155 for (curdev = devlist; curdev != NULL; curdev= curdev->next, i++)
157 f = ftdi_usb_open_dev(ftdi, curdev->dev);
160 fprintf(stderr, "Unable to open device %d: (%s)",
161 i, ftdi_get_error_string(ftdi));
164 fprintf(stderr, "Decoded values of device %d:\n", i);
165 read_decode_eeprom(ftdi);
166 ftdi_usb_close(ftdi);
168 ftdi_list_free(&devlist);
169 retval = EXIT_SUCCESS;
172 f = ftdi_usb_open_dev(ftdi, devlist[0].dev);
173 ftdi_list_free(&devlist);
178 f = ftdi_usb_open_desc(ftdi, vid, pid, desc, serial);
181 fprintf(stderr, "Device VID 0x%04x PID 0x%04x", vid, pid);
183 fprintf(stderr, " Desc %s", desc);
185 fprintf(stderr, " Serial %s", serial);
186 fprintf(stderr, "\n");
187 fprintf(stderr, "unable to open ftdi device: %d (%s)\n",
188 f, ftdi_get_error_string(ftdi));
196 f = ftdi_erase_eeprom(ftdi); /* needed to determine EEPROM chip type */
199 fprintf(stderr, "Erase failed: %s",
200 ftdi_get_error_string(ftdi));
204 if (ftdi_get_eeprom_value(ftdi, CHIP_TYPE, & value) <0)
206 fprintf(stderr, "ftdi_get_eeprom_value: %d (%s)\n",
207 f, ftdi_get_error_string(ftdi));
210 fprintf(stderr, "No EEPROM\n");
212 fprintf(stderr, "Internal EEPROM\n");
214 fprintf(stderr, "Found 93x%02x\n", value);
221 ftdi_eeprom_initdefaults(ftdi, NULL, NULL, NULL);
222 if (ftdi_set_eeprom_value(ftdi, MAX_POWER, 500) <0)
224 fprintf(stderr, "ftdi_set_eeprom_value: %d (%s)\n",
225 f, ftdi_get_error_string(ftdi));
228 if (ftdi_set_eeprom_value(ftdi, CHIP_TYPE, 0x66) <0)
230 fprintf(stderr, "ftdi_set_eeprom_value: %d (%s)\n",
231 f, ftdi_get_error_string(ftdi));
233 f=(ftdi_eeprom_build(ftdi));
236 fprintf(stderr, "ftdi_eeprom_build: %d (%s)\n",
237 f, ftdi_get_error_string(ftdi));
244 ftdi_eeprom_initdefaults(ftdi, NULL, NULL, NULL);
245 f = ftdi_erase_eeprom(ftdi);
246 if (ftdi_set_eeprom_value(ftdi, MAX_POWER, 500) <0)
248 fprintf(stderr, "ftdi_set_eeprom_value: %d (%s)\n",
249 f, ftdi_get_error_string(ftdi));
251 f = ftdi_erase_eeprom(ftdi);/* needed to determine EEPROM chip type */
252 if (ftdi_get_eeprom_value(ftdi, CHIP_TYPE, & value) <0)
254 fprintf(stderr, "ftdi_get_eeprom_value: %d (%s)\n",
255 f, ftdi_get_error_string(ftdi));
258 fprintf(stderr, "No EEPROM\n");
260 fprintf(stderr, "Internal EEPROM\n");
262 fprintf(stderr, "Found 93x%02x\n", value);
263 f=(ftdi_eeprom_build(ftdi));
266 fprintf(stderr, "Erase failed: %s",
267 ftdi_get_error_string(ftdi));
271 f = ftdi_write_eeprom(ftdi);
273 fprintf(stderr, "ftdi_eeprom_decode: %d (%s)\n",
274 f, ftdi_get_error_string(ftdi));
279 retval = read_decode_eeprom(ftdi);
281 ftdi_usb_close(ftdi);