Release 4.7 tools/spi/spidev_test.c

/*
 * SPI testing utility (using spidev driver)
 *
 * Copyright (c) 2007  MontaVista Software, Inc.
 * Copyright (c) 2007  Anton Vorontsov <avorontsov@ru.mvista.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License.
 *
 * Cross-compile with cross-gcc -I/path/to/cross-kernel/include
 */

#include <stdint.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <getopt.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <sys/stat.h>
#include <linux/types.h>
#include <linux/spi/spidev.h>


#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))



static void pabort(const char *s)
{
	perror(s);
	abort();
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
anton vorontsov
anton vorontsov
19
100.00%
1
100.00%
Total
19
100.00%
1
100.00%


static const char *device = "/dev/spidev1.1";

static uint32_t mode;

static uint8_t bits = 8;

static char *input_file;

static char *output_file;

static uint32_t speed = 500000;

static uint16_t delay;

static int verbose;


uint8_t default_tx[] = {
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0x40, 0x00, 0x00, 0x00, 0x00, 0x95,
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF,
	0xF0, 0x0D,
};


uint8_t default_rx[ARRAY_SIZE(default_tx)] = {0, };

char *input_tx;



static void hex_dump(const void *src, size_t length, size_t line_size,
		     char *prefix)
{
	int i = 0;
	const unsigned char *address = src;
	const unsigned char *line = address;
	unsigned char c;

	printf("%s | ", prefix);
	while (length-- > 0) {
		printf("%02X ", *address++);
		if (!(++i % line_size) || (length == 0 && i % line_size)) {
			if (length == 0) {
				while (i++ % line_size)
					printf("__ ");
			}
			printf(" | ");  /* right close */
			while (line < address) {
				c = *line++;
				printf("%c", (c < 33 || c == 255) ? 0x2E : c);
			}
			printf("\n");
			if (length > 0)
				printf("%s | ", prefix);
		}
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
adrian remonda
adrian remonda
170
100.00%
1
100.00%
Total
170
100.00%
1
100.00%

/*
 *  Unescape - process hexadecimal escape character
 *      converts shell input "\x23" -> 0x23
 */


static int unescape(char *_dst, char *_src, size_t len)
{
	int ret = 0;
	int match;
	char *src = _src;
	char *dst = _dst;
	unsigned int ch;

	while (*src) {
		if (*src == '\\' && *(src+1) == 'x') {
			match = sscanf(src + 2, "%2x", &ch);
			if (!match)
				pabort("malformed input string");

			src += 4;
			*dst++ = (unsigned char)ch;
		} else {
			*dst++ = *src++;
		}
		ret++;
	}
	return ret;
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
adrian remonda
adrian remonda
104
85.95%
1
33.33%
joshua clayton
joshua clayton
15
12.40%
1
33.33%
andrew morton
andrew morton
2
1.65%
1
33.33%
Total
121
100.00%
3
100.00%



static void transfer(int fd, uint8_t const *tx, uint8_t const *rx, size_t len)
{
	int ret;
	int out_fd;
	struct spi_ioc_transfer tr = {
		.tx_buf = (unsigned long)tx,
		.rx_buf = (unsigned long)rx,
		.len = len,
		.delay_usecs = delay,
		.speed_hz = speed,
		.bits_per_word = bits,
        };

	if (mode & SPI_TX_QUAD)
		tr.tx_nbits = 4;
	else if (mode & SPI_TX_DUAL)
		tr.tx_nbits = 2;
	if (mode & SPI_RX_QUAD)
		tr.rx_nbits = 4;
	else if (mode & SPI_RX_DUAL)
		tr.rx_nbits = 2;
	if (!(mode & SPI_LOOP)) {
		if (mode & (SPI_TX_QUAD | SPI_TX_DUAL))
			tr.rx_buf = 0;
		else if (mode & (SPI_RX_QUAD | SPI_RX_DUAL))
			tr.tx_buf = 0;
	}

	ret = ioctl(fd, SPI_IOC_MESSAGE(1), &tr);
	if (ret < 1)
		pabort("can't send spi message");

	if (verbose)
		hex_dump(tx, len, 32, "TX");

	if (output_file) {
		out_fd = open(output_file, O_WRONLY | O_CREAT | O_TRUNC, 0666);
		if (out_fd < 0)
			pabort("could not open output file");

		ret = write(out_fd, rx, len);
		if (ret != len)
			pabort("not all bytes written to output file");

		close(out_fd);
	}

	if (verbose || !output_file)
		hex_dump(rx, len, 32, "RX");
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
geert uytterhoeven
geert uytterhoeven
94
33.10%
1
12.50%
anton vorontsov
anton vorontsov
85
29.93%
1
12.50%
joshua clayton
joshua clayton
68
23.94%
1
12.50%
adrian remonda
adrian remonda
35
12.32%
3
37.50%
hector palacios
hector palacios
1
0.35%
1
12.50%
fabio estevam
fabio estevam
1
0.35%
1
12.50%
Total
284
100.00%
8
100.00%



static void print_usage(const char *prog)
{
	printf("Usage: %s [-DsbdlHOLC3]\n", prog);
	puts("  -D --device   device to use (default /dev/spidev1.1)\n"
	     "  -s --speed    max speed (Hz)\n"
	     "  -d --delay    delay (usec)\n"
	     "  -b --bpw      bits per word\n"
	     "  -i --input    input data from a file (e.g. \"test.bin\")\n"
	     "  -o --output   output data to a file (e.g. \"results.bin\")\n"
	     "  -l --loop     loopback\n"
	     "  -H --cpha     clock phase\n"
	     "  -O --cpol     clock polarity\n"
	     "  -L --lsb      least significant bit first\n"
	     "  -C --cs-high  chip select active high\n"
	     "  -3 --3wire    SI/SO signals shared\n"
	     "  -v --verbose  Verbose (show tx buffer)\n"
	     "  -p            Send data (e.g. \"1234\\xde\\xad\")\n"
	     "  -N --no-cs    no chip select\n"
	     "  -R --ready    slave pulls low to pause\n"
	     "  -2 --dual     dual transfer\n"
	     "  -4 --quad     quad transfer\n");
	exit(1);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
anton vorontsov
anton vorontsov
34
75.56%
1
10.00%
geert uytterhoeven
geert uytterhoeven
4
8.89%
2
20.00%
joshua clayton
joshua clayton
3
6.67%
3
30.00%
adrian remonda
adrian remonda
2
4.44%
2
20.00%
ladinu chandrasinghe
ladinu chandrasinghe
1
2.22%
1
10.00%
americo wang
americo wang
1
2.22%
1
10.00%
Total
45
100.00%
10
100.00%



static void parse_opts(int argc, char *argv[])
{
	while (1) {
		static const struct option lopts[] = {
			{ "device",  1, 0, 'D' },
			{ "speed",   1, 0, 's' },
			{ "delay",   1, 0, 'd' },
			{ "bpw",     1, 0, 'b' },
			{ "input",   1, 0, 'i' },
			{ "output",  1, 0, 'o' },
			{ "loop",    0, 0, 'l' },
			{ "cpha",    0, 0, 'H' },
			{ "cpol",    0, 0, 'O' },
			{ "lsb",     0, 0, 'L' },
			{ "cs-high", 0, 0, 'C' },
			{ "3wire",   0, 0, '3' },
			{ "no-cs",   0, 0, 'N' },
			{ "ready",   0, 0, 'R' },
			{ "dual",    0, 0, '2' },
			{ "verbose", 0, 0, 'v' },
			{ "quad",    0, 0, '4' },
			{ NULL, 0, 0, 0 },
                };
		int c;

		c = getopt_long(argc, argv, "D:s:d:b:i:o:lHOLC3NR24p:v",
				lopts, NULL);

		if (c == -1)
			break;

		switch (c) {
		case 'D':
			device = optarg;
			break;
		case 's':
			speed = atoi(optarg);
			break;
		case 'd':
			delay = atoi(optarg);
			break;
		case 'b':
			bits = atoi(optarg);
			break;
		case 'i':
			input_file = optarg;
			break;
		case 'o':
			output_file = optarg;
			break;
		case 'l':
			mode |= SPI_LOOP;
			break;
		case 'H':
			mode |= SPI_CPHA;
			break;
		case 'O':
			mode |= SPI_CPOL;
			break;
		case 'L':
			mode |= SPI_LSB_FIRST;
			break;
		case 'C':
			mode |= SPI_CS_HIGH;
			break;
		case '3':
			mode |= SPI_3WIRE;
			break;
		case 'N':
			mode |= SPI_NO_CS;
			break;
		case 'v':
			verbose = 1;
			break;
		case 'R':
			mode |= SPI_READY;
			break;
		case 'p':
			input_tx = optarg;
			break;
		case '2':
			mode |= SPI_TX_DUAL;
			break;
		case '4':
			mode |= SPI_TX_QUAD;
			break;
		default:
			print_usage(argv[0]);
			break;
		}
	}
	if (mode & SPI_LOOP) {
		if (mode & SPI_TX_DUAL)
			mode |= SPI_RX_DUAL;
		if (mode & SPI_TX_QUAD)
			mode |= SPI_RX_QUAD;
	}
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
anton vorontsov
anton vorontsov
267
61.81%
1
11.11%
geert uytterhoeven
geert uytterhoeven
64
14.81%
1
11.11%
joshua clayton
joshua clayton
37
8.56%
2
22.22%
david brownell
david brownell
36
8.33%
1
11.11%
adrian remonda
adrian remonda
26
6.02%
2
22.22%
ladinu chandrasinghe
ladinu chandrasinghe
1
0.23%
1
11.11%
americo wang
americo wang
1
0.23%
1
11.11%
Total
432
100.00%
9
100.00%



static void transfer_escaped_string(int fd, char *str)
{
	size_t size = strlen(str + 1);
	uint8_t *tx;
	uint8_t *rx;

	tx = malloc(size);
	if (!tx)
		pabort("can't allocate tx buffer");

	rx = malloc(size);
	if (!rx)
		pabort("can't allocate rx buffer");

	size = unescape((char *)tx, str, size);
	transfer(fd, tx, rx, size);
	free(rx);
	free(tx);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
joshua clayton
joshua clayton
101
100.00%
1
100.00%
Total
101
100.00%
1
100.00%



static void transfer_file(int fd, char *filename)
{
	ssize_t bytes;
	struct stat sb;
	int tx_fd;
	uint8_t *tx;
	uint8_t *rx;

	if (stat(filename, &sb) == -1)
		pabort("can't stat input file");

	tx_fd = open(filename, O_RDONLY);
	if (fd < 0)
		pabort("can't open input file");

	tx = malloc(sb.st_size);
	if (!tx)
		pabort("can't allocate tx buffer");

	rx = malloc(sb.st_size);
	if (!rx)
		pabort("can't allocate rx buffer");

	bytes = read(tx_fd, tx, sb.st_size);
	if (bytes != sb.st_size)
		pabort("failed to read input file");

	transfer(fd, tx, rx, sb.st_size);
	free(rx);
	free(tx);
	close(tx_fd);
}

Contributors
Person
Tokens
Prop
Commits
CommitProp
joshua clayton
joshua clayton
161
100.00%
1
100.00%
Total
161
100.00%
1
100.00%



int main(int argc, char *argv[])
{
	int ret = 0;
	int fd;

	parse_opts(argc, argv);

	fd = open(device, O_RDWR);
	if (fd < 0)
		pabort("can't open device");

	/*
         * spi mode
         */
	ret = ioctl(fd, SPI_IOC_WR_MODE32, &mode);
	if (ret == -1)
		pabort("can't set spi mode");

	ret = ioctl(fd, SPI_IOC_RD_MODE32, &mode);
	if (ret == -1)
		pabort("can't get spi mode");

	/*
         * bits per word
         */
	ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits);
	if (ret == -1)
		pabort("can't set bits per word");

	ret = ioctl(fd, SPI_IOC_RD_BITS_PER_WORD, &bits);
	if (ret == -1)
		pabort("can't get bits per word");

	/*
         * max speed hz
         */
	ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed);
	if (ret == -1)
		pabort("can't set max speed hz");

	ret = ioctl(fd, SPI_IOC_RD_MAX_SPEED_HZ, &speed);
	if (ret == -1)
		pabort("can't get max speed hz");

	printf("spi mode: 0x%x\n", mode);
	printf("bits per word: %d\n", bits);
	printf("max speed: %d Hz (%d KHz)\n", speed, speed/1000);

	if (input_tx && input_file)
		pabort("only one of -p and --input may be selected");

	if (input_tx)
		transfer_escaped_string(fd, input_tx);
	else if (input_file)
		transfer_file(fd, input_file);
	else
		transfer(fd, default_tx, default_rx, sizeof(default_tx));

	close(fd);

	return ret;
}
Contributors
Person
Tokens
Prop
Commits
CommitProp
anton vorontsov
anton vorontsov
229
82.67%
1
20.00%
joshua clayton
joshua clayton
25
9.03%
2
40.00%
adrian remonda
adrian remonda
20
7.22%
1
20.00%
geert uytterhoeven
geert uytterhoeven
3
1.08%
1
20.00%
Total
277
100.00%
5
100.00%

Overall Contributors
Person
Tokens
Prop
Commits
CommitProp
anton vorontsov
anton vorontsov
695
39.02%
1
5.88%
adrian remonda
adrian remonda
452
25.38%
3
17.65%
joshua clayton
joshua clayton
423
23.75%
5
29.41%
geert uytterhoeven
geert uytterhoeven
166
9.32%
2
11.76%
david brownell
david brownell
36
2.02%
1
5.88%
americo wang
americo wang
3
0.17%
1
5.88%
andrew morton
andrew morton
2
0.11%
1
5.88%
ladinu chandrasinghe
ladinu chandrasinghe
2
0.11%
1
5.88%
fabio estevam
fabio estevam
1
0.06%
1
5.88%
hector palacios
hector palacios
1
0.06%
1
5.88%
Total
1781
100.00%
17
100.00%
  
Directory: tools/spi

Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.