1 /* LIBFTDI EEPROM access example
3 This program is distributed under the GPL, version 2
14 int main(int argc, char **argv)
16 struct ftdi_context *ftdi;
17 unsigned char buf[256];
22 char const *serial = 0;
31 if ((ftdi = ftdi_new()) == 0)
33 fprintf(stderr, "Failed to allocate ftdi structure :%s \n",
34 ftdi_get_error_string(ftdi));
38 while ((i = getopt(argc, argv, "d::ev:p:l:P:S:w")) != -1)
51 vid = strtoul(optarg, NULL, 0);
54 pid = strtoul(optarg, NULL, 0);
66 fprintf(stderr, "usage: %s [options]\n", *argv);
67 fprintf(stderr, "\t-d[num] Work with default valuesfor 128 Byte "
68 "EEPROM or for 256 Byte EEPROM if some [num] is given\n");
69 fprintf(stderr, "\t-w write\n");
70 fprintf(stderr, "\t-e erase\n");
71 fprintf(stderr, "\t-v verbose decoding\n");
72 fprintf(stderr, "\t-p <number> Search for device with PID == number\n");
73 fprintf(stderr, "\t-v <number> Search for device with VID == number\n");
74 fprintf(stderr, "\t-P <string? Search for device with given "
75 "product description\n");
76 fprintf(stderr, "\t-S <string? Search for device with given "
83 // Select first interface
84 ftdi_set_interface(ftdi, INTERFACE_ANY);
87 f = ftdi_usb_open_desc(ftdi, vid, pid, desc, serial);
90 fprintf(stderr, "Device VID 0x%04x PID 0x%04x", vid, pid);
92 fprintf(stderr, " Desc %s", desc);
94 fprintf(stderr, " Serial %s", serial);
95 fprintf(stderr, "\n");
96 fprintf(stderr, "unable to open ftdi device: %d (%s)\n",
97 f, ftdi_get_error_string(ftdi));
105 f = ftdi_erase_eeprom(ftdi); /* needed to determine EEPROM chip type */
108 fprintf(stderr, "Erase failed: %s",
109 ftdi_get_error_string(ftdi));
113 if (ftdi_get_eeprom_value(ftdi, CHIP_TYPE, & value) <0)
115 fprintf(stderr, "ftdi_get_eeprom_value: %d (%s)\n",
116 f, ftdi_get_error_string(ftdi));
119 fprintf(stderr, "No EEPROM\n");
121 fprintf(stderr, "Internal EEPROM\n");
123 fprintf(stderr, "Found 93x%02x\n", value);
130 ftdi_eeprom_initdefaults(ftdi, NULL, NULL, NULL);
131 if (ftdi_set_eeprom_value(ftdi, MAX_POWER, 500) <0)
133 fprintf(stderr, "ftdi_set_eeprom_value: %d (%s)\n",
134 f, ftdi_get_error_string(ftdi));
137 if (ftdi_set_eeprom_value(ftdi, CHIP_TYPE, 0x66) <0)
139 fprintf(stderr, "ftdi_set_eeprom_value: %d (%s)\n",
140 f, ftdi_get_error_string(ftdi));
142 f=(ftdi_eeprom_build(ftdi));
145 fprintf(stderr, "ftdi_eeprom_build: %d (%s)\n",
146 f, ftdi_get_error_string(ftdi));
153 ftdi_eeprom_initdefaults(ftdi, NULL, NULL, NULL);
154 f = ftdi_erase_eeprom(ftdi);
155 if (ftdi_set_eeprom_value(ftdi, MAX_POWER, 500) <0)
157 fprintf(stderr, "ftdi_set_eeprom_value: %d (%s)\n",
158 f, ftdi_get_error_string(ftdi));
160 f = ftdi_erase_eeprom(ftdi);/* needed to determine EEPROM chip type */
161 if (ftdi_get_eeprom_value(ftdi, CHIP_TYPE, & value) <0)
163 fprintf(stderr, "ftdi_get_eeprom_value: %d (%s)\n",
164 f, ftdi_get_error_string(ftdi));
167 fprintf(stderr, "No EEPROM\n");
169 fprintf(stderr, "Internal EEPROM\n");
171 fprintf(stderr, "Found 93x%02x\n", value);
172 f=(ftdi_eeprom_build(ftdi));
175 fprintf(stderr, "Erase failed: %s",
176 ftdi_get_error_string(ftdi));
180 f = ftdi_write_eeprom(ftdi);
182 fprintf(stderr, "ftdi_eeprom_decode: %d (%s)\n",
183 f, ftdi_get_error_string(ftdi));
188 f = ftdi_read_eeprom(ftdi);
191 fprintf(stderr, "ftdi_read_eeprom: %d (%s)\n",
192 f, ftdi_get_error_string(ftdi));
198 ftdi_get_eeprom_value(ftdi, CHIP_SIZE, & value);
201 fprintf(stderr, "No EEPROM found\n");
206 fprintf(stderr, "Chip type %d ftdi_eeprom_size: %d\n", ftdi->type, value);
207 if (ftdi->type == TYPE_R)
211 ftdi_get_eeprom_buf(ftdi, buf, size);
212 for (i=0; i < size; i += 16)
214 fprintf(stdout,"0x%03x:", i);
216 for (j = 0; j< 8; j++)
217 fprintf(stdout," %02x", buf[i+j]);
220 fprintf(stdout," %02x", buf[i+j]);
222 for (j = 0; j< 8; j++)
223 fprintf(stdout,"%c", isprint(buf[i+j])?buf[i+j]:'.');
226 fprintf(stdout,"%c", isprint(buf[i+j])?buf[i+j]:'.');
227 fprintf(stdout,"\n");
230 f = ftdi_eeprom_decode(ftdi, 1);
233 fprintf(stderr, "ftdi_eeprom_decode: %d (%s)\n",
234 f, ftdi_get_error_string(ftdi));
239 ftdi_usb_close(ftdi);