[libftdi] / examples / eeprom.c

/* LIBFTDI EEPROM access example

   This program is distributed under the GPL, version 2
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include <unistd.h>
#include <getopt.h>
#include <ftdi.h>

int read_decode_eeprom(struct ftdi_context *ftdi)
{
    int i, j, f;
    int value;
    int size;
    unsigned char buf[256];

    f = ftdi_read_eeprom(ftdi);
    if (f < 0)
    {
        fprintf(stderr, "ftdi_read_eeprom: %d (%s)\n",
                f, ftdi_get_error_string(ftdi));
        return -1;
    }


    ftdi_get_eeprom_value(ftdi, CHIP_SIZE, & value);
    if (value <0)
    {
        fprintf(stderr, "No EEPROM found or EEPROM empty\n");
        fprintf(stderr, "On empty EEPROM, use -w option to write default values\n");
        return -1;
    }
    fprintf(stderr, "Chip type %d ftdi_eeprom_size: %d\n", ftdi->type, value);
    if (ftdi->type == TYPE_R)
        size = 0xa0;
    else
        size = value;
    ftdi_get_eeprom_buf(ftdi, buf, size);
    for (i=0; i < size; i += 16)
    {
        fprintf(stdout,"0x%03x:", i);

        for (j = 0; j< 8; j++)
            fprintf(stdout," %02x", buf[i+j]);
        fprintf(stdout," ");
        for (; j< 16; j++)
            fprintf(stdout," %02x", buf[i+j]);
        fprintf(stdout," ");
        for (j = 0; j< 8; j++)
            fprintf(stdout,"%c", isprint(buf[i+j])?buf[i+j]:'.');
        fprintf(stdout," ");
        for (; j< 16; j++)
            fprintf(stdout,"%c", isprint(buf[i+j])?buf[i+j]:'.');
        fprintf(stdout,"\n");
    }

    f = ftdi_eeprom_decode(ftdi, 1);
    if (f < 0)
    {
        fprintf(stderr, "ftdi_eeprom_decode: %d (%s)\n",
                f, ftdi_get_error_string(ftdi));
        return -1;
    }
    return 0;
}

int main(int argc, char **argv)
{
    struct ftdi_context *ftdi;
    int f, i;
    int vid = 0;
    int pid = 0;
    char const *desc    = 0;
    char const *serial  = 0;
    int erase = 0;
    int use_defaults = 0;
    int large_chip = 0;
    int do_write = 0;
    int retval = 0;
    int value;

    if ((ftdi = ftdi_new()) == 0)
    {
        fprintf(stderr, "Failed to allocate ftdi structure :%s \n",
                ftdi_get_error_string(ftdi));
        return EXIT_FAILURE;
    }

    while ((i = getopt(argc, argv, "d::ev:p:l:P:S:w")) != -1)
    {
        switch (i)
        {
            case 'd':
                use_defaults = 1;
                if (optarg)
                    large_chip = 0x66;
                break;
            case 'e':
                erase = 1;
                break;
            case 'v':
                vid = strtoul(optarg, NULL, 0);
                break;
            case 'p':
                pid = strtoul(optarg, NULL, 0);
                break;
            case 'P':
                desc = optarg;
                break;
            case 'S':
                serial = optarg;
                break;
            case 'w':
                do_write  = 1;
                break;
            default:
                fprintf(stderr, "usage: %s [options]\n", *argv);
                fprintf(stderr, "\t-d[num] Work with default valuesfor 128 Byte "
                        "EEPROM or for 256 Byte EEPROM if some [num] is given\n");
                fprintf(stderr, "\t-w write\n");
                fprintf(stderr, "\t-e erase\n");
                fprintf(stderr, "\t-v verbose decoding\n");
                fprintf(stderr, "\t-p <number> Search for device with PID == number\n");
                fprintf(stderr, "\t-v <number> Search for device with VID == number\n");
                fprintf(stderr, "\t-P <string? Search for device with given "
                        "product description\n");
                fprintf(stderr, "\t-S <string? Search for device with given "
                        "serial number\n");
                retval = -1;
                goto done;
        }
    }

    // Select first interface
    ftdi_set_interface(ftdi, INTERFACE_ANY);

    if (!vid && !pid && desc == NULL && serial == NULL)
    {
        struct ftdi_device_list *devlist, *curdev;
        int res;
        if ((res = ftdi_usb_find_all(ftdi, &devlist, 0, 0)) < 0)
        {
            fprintf(stderr, "No FTDI with default VID/PID found\n");
            retval =  EXIT_FAILURE;
            goto do_deinit;
        }
        if (res > 1)
        {
            int i = 1;
            fprintf(stderr, "%d FTDI devices found: Only Readout on EEPROM done. ",res);
            fprintf(stderr, "Use VID/PID/desc/serial to select device\n");
            for (curdev = devlist; curdev != NULL; curdev= curdev->next, i++)
            {
                f = ftdi_usb_open_dev(ftdi,  curdev->dev);
                if (f<0)
                {
                    fprintf(stderr, "Unable to open device %d: (%s)",
                            i, ftdi_get_error_string(ftdi));
                    continue;
                }
                fprintf(stderr, "Decoded values of device %d:\n", i);
                read_decode_eeprom(ftdi);
                ftdi_usb_close(ftdi);
            }
            ftdi_list_free(&devlist);
            retval = EXIT_SUCCESS;
            goto do_deinit;
        }
        else if (res == 1)
        {
            f = ftdi_usb_open_dev(ftdi,  devlist[0].dev);
            if (f<0)
            {
                fprintf(stderr, "Unable to open device %d: (%s)",
                        i, ftdi_get_error_string(ftdi));
            }
        }
        else
        {
            fprintf(stderr, "No devices found\n");
            f = 0;
        }
        ftdi_list_free(&devlist);
    }
    else
    {
        // Open device
        f = ftdi_usb_open_desc(ftdi, vid, pid, desc, serial);
        if (f < 0)
        {
            fprintf(stderr, "Device VID 0x%04x PID 0x%04x", vid, pid);
            if (desc)
                fprintf(stderr, " Desc %s", desc);
            if (serial)
                fprintf(stderr, " Serial %s", serial);
            fprintf(stderr, "\n");
            fprintf(stderr, "unable to open ftdi device: %d (%s)\n",
                    f, ftdi_get_error_string(ftdi));
            
            retval = -1;
            goto done;
        }
    }
    if (erase)
    {
        f = ftdi_erase_eeprom(ftdi); /* needed to determine EEPROM chip type */
        if (f < 0)
        {
            fprintf(stderr, "Erase failed: %s",
                    ftdi_get_error_string(ftdi));
            retval =  -2;
            goto done;
        }
        if (ftdi_get_eeprom_value(ftdi, CHIP_TYPE, & value) <0)
        {
            fprintf(stderr, "ftdi_get_eeprom_value: %d (%s)\n",
                    f, ftdi_get_error_string(ftdi));
        }
        if (value == -1)
            fprintf(stderr, "No EEPROM\n");
        else if (value == 0)
            fprintf(stderr, "Internal EEPROM\n");
        else
            fprintf(stderr, "Found 93x%02x\n", value);
        retval = 0;
        goto done;
    }

    if (use_defaults)
    {
        ftdi_eeprom_initdefaults(ftdi, NULL, NULL, NULL);
        if (ftdi_set_eeprom_value(ftdi, MAX_POWER, 500) <0)
        {
            fprintf(stderr, "ftdi_set_eeprom_value: %d (%s)\n",
                    f, ftdi_get_error_string(ftdi));
        }
        if (large_chip)
            if (ftdi_set_eeprom_value(ftdi, CHIP_TYPE, 0x66) <0)
            {
                fprintf(stderr, "ftdi_set_eeprom_value: %d (%s)\n",
                        f, ftdi_get_error_string(ftdi));
            }
        f=(ftdi_eeprom_build(ftdi));
        if (f < 0)
        {
            fprintf(stderr, "ftdi_eeprom_build: %d (%s)\n",
                    f, ftdi_get_error_string(ftdi));
            retval = -1;
            goto done;
        }
    }
    else if (do_write)
    {
        ftdi_eeprom_initdefaults(ftdi, NULL, NULL, NULL);
        f = ftdi_erase_eeprom(ftdi);
        if (ftdi_set_eeprom_value(ftdi, MAX_POWER, 500) <0)
        {
            fprintf(stderr, "ftdi_set_eeprom_value: %d (%s)\n",
                    f, ftdi_get_error_string(ftdi));
        }
        f = ftdi_erase_eeprom(ftdi);/* needed to determine EEPROM chip type */
        if (ftdi_get_eeprom_value(ftdi, CHIP_TYPE, & value) <0)
        {
            fprintf(stderr, "ftdi_get_eeprom_value: %d (%s)\n",
                    f, ftdi_get_error_string(ftdi));
        }
        if (value == -1)
            fprintf(stderr, "No EEPROM\n");
        else if (value == 0)
            fprintf(stderr, "Internal EEPROM\n");
        else
            fprintf(stderr, "Found 93x%02x\n", value);
        f=(ftdi_eeprom_build(ftdi));
        if (f < 0)
        {
            fprintf(stderr, "Erase failed: %s",
                    ftdi_get_error_string(ftdi));
            retval = -2;
            goto done;
        }
        f = ftdi_write_eeprom(ftdi);
        {
            fprintf(stderr, "ftdi_eeprom_decode: %d (%s)\n",
                    f, ftdi_get_error_string(ftdi));
            retval = 1;
            goto done;
        }
    }
    retval = read_decode_eeprom(ftdi);
done:
    ftdi_usb_close(ftdi);
do_deinit:
    ftdi_free(ftdi);
    return retval;
}
Commit	Line	Data
2db3a766 UB	1	/* LIBFTDI EEPROM access example
	2
	3	This program is distributed under the GPL, version 2
	4	*/
	5
	6	#include <stdio.h>
	7	#include <stdlib.h>
	8	#include <string.h>
	9	#include <ctype.h>
	10	#include <unistd.h>
	11	#include <getopt.h>
	12	#include <ftdi.h>
	13
8ee8775e UB	14	int read_decode_eeprom(struct ftdi_context *ftdi)
	15	{
	16	int i, j, f;
	17	int value;
	18	int size;
	19	unsigned char buf[256];
	20
	21	f = ftdi_read_eeprom(ftdi);
	22	if (f < 0)
	23	{
	24	fprintf(stderr, "ftdi_read_eeprom: %d (%s)\n",
	25	f, ftdi_get_error_string(ftdi));
	26	return -1;
	27	}
	28
	29
	30	ftdi_get_eeprom_value(ftdi, CHIP_SIZE, & value);
	31	if (value <0)
	32	{
2e4e22c4 UB	33	fprintf(stderr, "No EEPROM found or EEPROM empty\n");
2e4e22c4 UB	34	fprintf(stderr, "On empty EEPROM, use -w option to write default values\n");
8ee8775e UB	35	return -1;
	36	}
	37	fprintf(stderr, "Chip type %d ftdi_eeprom_size: %d\n", ftdi->type, value);
	38	if (ftdi->type == TYPE_R)
	39	size = 0xa0;
	40	else
	41	size = value;
	42	ftdi_get_eeprom_buf(ftdi, buf, size);
	43	for (i=0; i < size; i += 16)
	44	{
	45	fprintf(stdout,"0x%03x:", i);
	46
	47	for (j = 0; j< 8; j++)
	48	fprintf(stdout," %02x", buf[i+j]);
	49	fprintf(stdout," ");
	50	for (; j< 16; j++)
	51	fprintf(stdout," %02x", buf[i+j]);
	52	fprintf(stdout," ");
	53	for (j = 0; j< 8; j++)
	54	fprintf(stdout,"%c", isprint(buf[i+j])?buf[i+j]:'.');
	55	fprintf(stdout," ");
	56	for (; j< 16; j++)
	57	fprintf(stdout,"%c", isprint(buf[i+j])?buf[i+j]:'.');
	58	fprintf(stdout,"\n");
	59	}
	60
	61	f = ftdi_eeprom_decode(ftdi, 1);
	62	if (f < 0)
	63	{
	64	fprintf(stderr, "ftdi_eeprom_decode: %d (%s)\n",
	65	f, ftdi_get_error_string(ftdi));
	66	return -1;
	67	}
	68	return 0;
	69	}
	70
2db3a766 UB	71	int main(int argc, char **argv)
2db3a766 UB	72	{
f38b0866	73	struct ftdi_context *ftdi;
8ee8775e UB	74	int f, i;
	75	int vid = 0;
	76	int pid = 0;
2db3a766 UB	77	char const *desc = 0;
	78	char const *serial = 0;
	79	int erase = 0;
4fb2ebbb	80	int use_defaults = 0;
2db3a766	81	int large_chip = 0;
0091182e	82	int do_write = 0;
bd4a9e38	83	int retval = 0;
8ee8775e	84	int value;
2db3a766	85
f38b0866 UB	86	if ((ftdi = ftdi_new()) == 0)
f38b0866 UB	87	{
05c2e40a TJ	88	fprintf(stderr, "Failed to allocate ftdi structure :%s \n",
05c2e40a TJ	89	ftdi_get_error_string(ftdi));
f38b0866 UB	90	return EXIT_FAILURE;
	91	}
	92
0091182e	93	while ((i = getopt(argc, argv, "d::ev:p:l:P:S:w")) != -1)
2db3a766 UB	94	{
	95	switch (i)
	96	{
05c2e40a TJ	97	case 'd':
	98	use_defaults = 1;
	99	if (optarg)
	100	large_chip = 0x66;
	101	break;
	102	case 'e':
	103	erase = 1;
	104	break;
	105	case 'v':
	106	vid = strtoul(optarg, NULL, 0);
	107	break;
	108	case 'p':
	109	pid = strtoul(optarg, NULL, 0);
	110	break;
	111	case 'P':
2db3a766	112	desc = optarg;
05c2e40a TJ	113	break;
	114	case 'S':
	115	serial = optarg;
	116	break;
	117	case 'w':
	118	do_write = 1;
	119	break;
	120	default:
	121	fprintf(stderr, "usage: %s [options]\n", *argv);
	122	fprintf(stderr, "\t-d[num] Work with default valuesfor 128 Byte "
82e0fc5a	123	"EEPROM or for 256 Byte EEPROM if some [num] is given\n");
05c2e40a TJ	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 "
2db3a766	130	"product description\n");
05c2e40a	131	fprintf(stderr, "\t-S <string? Search for device with given "
2db3a766	132	"serial number\n");
bd4a9e38 UB	133	retval = -1;
bd4a9e38 UB	134	goto done;
2db3a766 UB	135	}
	136	}
	137
2db3a766	138	// Select first interface
f38b0866	139	ftdi_set_interface(ftdi, INTERFACE_ANY);
2db3a766	140
8ee8775e	141	if (!vid && !pid && desc == NULL && serial == NULL)
2db3a766	142	{
8ee8775e UB	143	struct ftdi_device_list devlist, curdev;
	144	int res;
	145	if ((res = ftdi_usb_find_all(ftdi, &devlist, 0, 0)) < 0)
	146	{
	147	fprintf(stderr, "No FTDI with default VID/PID found\n");
	148	retval = EXIT_FAILURE;
	149	goto do_deinit;
	150	}
	151	if (res > 1)
	152	{
	153	int i = 1;
	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++)
	157	{
	158	f = ftdi_usb_open_dev(ftdi, curdev->dev);
	159	if (f<0)
	160	{
	161	fprintf(stderr, "Unable to open device %d: (%s)",
	162	i, ftdi_get_error_string(ftdi));
	163	continue;
	164	}
	165	fprintf(stderr, "Decoded values of device %d:\n", i);
	166	read_decode_eeprom(ftdi);
	167	ftdi_usb_close(ftdi);
	168	}
	169	ftdi_list_free(&devlist);
	170	retval = EXIT_SUCCESS;
	171	goto do_deinit;
	172	}
95f29fc4 UB	173	else if (res == 1)
	174	{
	175	f = ftdi_usb_open_dev(ftdi, devlist[0].dev);
	176	if (f<0)
	177	{
	178	fprintf(stderr, "Unable to open device %d: (%s)",
	179	i, ftdi_get_error_string(ftdi));
	180	}
	181	}
	182	else
	183	{
	184	fprintf(stderr, "No devices found\n");
	185	f = 0;
	186	}
8ee8775e UB	187	ftdi_list_free(&devlist);
	188	}
	189	else
	190	{
	191	// Open device
	192	f = ftdi_usb_open_desc(ftdi, vid, pid, desc, serial);
	193	if (f < 0)
	194	{
	195	fprintf(stderr, "Device VID 0x%04x PID 0x%04x", vid, pid);
	196	if (desc)
	197	fprintf(stderr, " Desc %s", desc);
	198	if (serial)
	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));
	203
	204	retval = -1;
	205	goto done;
	206	}
2db3a766	207	}
2db3a766 UB	208	if (erase)
2db3a766 UB	209	{
82e0fc5a	210	f = ftdi_erase_eeprom(ftdi); /* needed to determine EEPROM chip type */
2db3a766 UB	211	if (f < 0)
2db3a766 UB	212	{
05c2e40a	213	fprintf(stderr, "Erase failed: %s",
f38b0866	214	ftdi_get_error_string(ftdi));
bd4a9e38 UB	215	retval = -2;
bd4a9e38 UB	216	goto done;
2db3a766	217	}
05c2e40a TJ	218	if (ftdi_get_eeprom_value(ftdi, CHIP_TYPE, & value) <0)
	219	{
	220	fprintf(stderr, "ftdi_get_eeprom_value: %d (%s)\n",
82e0fc5a	221	f, ftdi_get_error_string(ftdi));
05c2e40a	222	}
82e0fc5a	223	if (value == -1)
2db3a766	224	fprintf(stderr, "No EEPROM\n");
82e0fc5a	225	else if (value == 0)
2db3a766 UB	226	fprintf(stderr, "Internal EEPROM\n");
2db3a766 UB	227	else
82e0fc5a	228	fprintf(stderr, "Found 93x%02x\n", value);
bd4a9e38 UB	229	retval = 0;
bd4a9e38 UB	230	goto done;
05c2e40a	231	}
2db3a766	232
05c2e40a	233	if (use_defaults)
2db3a766	234	{
bd4a9e38	235	ftdi_eeprom_initdefaults(ftdi, NULL, NULL, NULL);
05c2e40a TJ	236	if (ftdi_set_eeprom_value(ftdi, MAX_POWER, 500) <0)
	237	{
	238	fprintf(stderr, "ftdi_set_eeprom_value: %d (%s)\n",
82e0fc5a	239	f, ftdi_get_error_string(ftdi));
05c2e40a TJ	240	}
	241	if (large_chip)
	242	if (ftdi_set_eeprom_value(ftdi, CHIP_TYPE, 0x66) <0)
	243	{
	244	fprintf(stderr, "ftdi_set_eeprom_value: %d (%s)\n",
	245	f, ftdi_get_error_string(ftdi));
	246	}
a35aa9bd	247	f=(ftdi_eeprom_build(ftdi));
2db3a766 UB	248	if (f < 0)
2db3a766 UB	249	{
05c2e40a	250	fprintf(stderr, "ftdi_eeprom_build: %d (%s)\n",
f38b0866	251	f, ftdi_get_error_string(ftdi));
bd4a9e38 UB	252	retval = -1;
bd4a9e38 UB	253	goto done;
2db3a766 UB	254	}
2db3a766 UB	255	}
05c2e40a	256	else if (do_write)
0091182e	257	{
bd4a9e38	258	ftdi_eeprom_initdefaults(ftdi, NULL, NULL, NULL);
05c2e40a TJ	259	f = ftdi_erase_eeprom(ftdi);
	260	if (ftdi_set_eeprom_value(ftdi, MAX_POWER, 500) <0)
	261	{
	262	fprintf(stderr, "ftdi_set_eeprom_value: %d (%s)\n",
82e0fc5a	263	f, ftdi_get_error_string(ftdi));
05c2e40a	264	}
82e0fc5a	265	f = ftdi_erase_eeprom(ftdi);/* needed to determine EEPROM chip type */
05c2e40a TJ	266	if (ftdi_get_eeprom_value(ftdi, CHIP_TYPE, & value) <0)
	267	{
	268	fprintf(stderr, "ftdi_get_eeprom_value: %d (%s)\n",
82e0fc5a	269	f, ftdi_get_error_string(ftdi));
05c2e40a	270	}
82e0fc5a	271	if (value == -1)
0091182e	272	fprintf(stderr, "No EEPROM\n");
82e0fc5a	273	else if (value == 0)
0091182e UB	274	fprintf(stderr, "Internal EEPROM\n");
0091182e UB	275	else
82e0fc5a	276	fprintf(stderr, "Found 93x%02x\n", value);
0091182e UB	277	f=(ftdi_eeprom_build(ftdi));
	278	if (f < 0)
	279	{
05c2e40a	280	fprintf(stderr, "Erase failed: %s",
0091182e	281	ftdi_get_error_string(ftdi));
bd4a9e38 UB	282	retval = -2;
bd4a9e38 UB	283	goto done;
0091182e UB	284	}
	285	f = ftdi_write_eeprom(ftdi);
	286	{
05c2e40a	287	fprintf(stderr, "ftdi_eeprom_decode: %d (%s)\n",
0091182e	288	f, ftdi_get_error_string(ftdi));
bd4a9e38 UB	289	retval = 1;
bd4a9e38 UB	290	goto done;
0091182e	291	}
05c2e40a	292	}
8ee8775e	293	retval = read_decode_eeprom(ftdi);
bd4a9e38	294	done:
f38b0866	295	ftdi_usb_close(ftdi);
8ee8775e	296	do_deinit:
f38b0866	297	ftdi_free(ftdi);
bd4a9e38	298	return retval;
2db3a766	299	}