319 lines
6.6 KiB
C
319 lines
6.6 KiB
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 <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();
|
||
|
|
}
|
||
|
|
|
||
|
|
static const char *device = "/dev/spidev1.1";
|
||
|
|
static uint32_t mode;
|
||
|
|
static uint8_t bits = 8;
|
||
|
|
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);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Unescape - process hexadecimal escape character
|
||
|
|
* converts shell input "\x23" -> 0x23
|
||
|
|
*/
|
||
|
|
static int unescape(char *_dst, char *_src, size_t len)
|
||
|
|
{
|
||
|
|
int ret = 0;
|
||
|
|
char *src = _src;
|
||
|
|
char *dst = _dst;
|
||
|
|
unsigned int ch;
|
||
|
|
|
||
|
|
while (*src) {
|
||
|
|
if (*src == '\\' && *(src+1) == 'x') {
|
||
|
|
sscanf(src + 2, "%2x", &ch);
|
||
|
|
src += 4;
|
||
|
|
*dst++ = (unsigned char)ch;
|
||
|
|
} else {
|
||
|
|
*dst++ = *src++;
|
||
|
|
}
|
||
|
|
ret++;
|
||
|
|
}
|
||
|
|
return ret;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void transfer(int fd, uint8_t const *tx, uint8_t const *rx, size_t len)
|
||
|
|
{
|
||
|
|
int ret;
|
||
|
|
|
||
|
|
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");
|
||
|
|
hex_dump(rx, len, 32, "RX");
|
||
|
|
}
|
||
|
|
|
||
|
|
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"
|
||
|
|
" -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);
|
||
|
|
}
|
||
|
|
|
||
|
|
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' },
|
||
|
|
{ "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: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 '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;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
int main(int argc, char *argv[])
|
||
|
|
{
|
||
|
|
int ret = 0;
|
||
|
|
int fd;
|
||
|
|
uint8_t *tx;
|
||
|
|
uint8_t *rx;
|
||
|
|
int size;
|
||
|
|
|
||
|
|
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) {
|
||
|
|
size = strlen(input_tx+1);
|
||
|
|
tx = malloc(size);
|
||
|
|
rx = malloc(size);
|
||
|
|
size = unescape((char *)tx, input_tx, size);
|
||
|
|
transfer(fd, tx, rx, size);
|
||
|
|
free(rx);
|
||
|
|
free(tx);
|
||
|
|
} else {
|
||
|
|
transfer(fd, default_tx, default_rx, sizeof(default_tx));
|
||
|
|
}
|
||
|
|
|
||
|
|
close(fd);
|
||
|
|
|
||
|
|
return ret;
|
||
|
|
}
|