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spi: spidev_test: Added input buffer from the terminal

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Signed-off-by: Adrian Remonda <adrianremonda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Adrian Remonda 2015-03-10 16:12:32 -04:00 committed by Mark Brown
parent 31a5c5a72b
commit 30061915be
1 changed files with 60 additions and 16 deletions
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76
Documentation/spi/spidev_test.c
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@ -37,6 +37,18 @@ 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;
@ -64,23 +76,38 @@ static void hex_dump(const void *src, size_t length, size_t line_size, char *pre
}
}
static void transfer(int fd)
/*
* Unescape - process hexadecimal escape character
* converts shell input "\x23" -> 0x23
*/
int unespcape(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;
uint8_t 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,
0xDE, 0xAD, 0xBE, 0xEF, 0xBA, 0xAD,
0xF0, 0x0D,
};
uint8_t rx[ARRAY_SIZE(tx)] = {0, };
struct spi_ioc_transfer tr = {
.tx_buf = (unsigned long)tx,
.rx_buf = (unsigned long)rx,
.len = ARRAY_SIZE(tx),
.len = len,
.delay_usecs = delay,
.speed_hz = speed,
.bits_per_word = bits,
@ -106,8 +133,8 @@ static void transfer(int fd)
pabort("can't send spi message");
if (verbose)
hex_dump(tx, ARRAY_SIZE(tx), 32, "TX");
hex_dump(rx, ARRAY_SIZE(rx), 32, "RX");
hex_dump(tx, len, 32, "TX");
hex_dump(rx, len, 32, "RX");
}
static void print_usage(const char *prog)
@ -124,6 +151,7 @@ static void print_usage(const char *prog)
" -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"
@ -154,7 +182,7 @@ static void parse_opts(int argc, char *argv[])
};
int c;
c = getopt_long(argc, argv, "D:s:d:b:lHOLC3NR24:v", lopts, NULL);
c = getopt_long(argc, argv, "D:s:d:b:lHOLC3NR24p:v", lopts, NULL);
if (c == -1)
break;
@ -199,6 +227,9 @@ static void parse_opts(int argc, char *argv[])
case 'R':
mode |= SPI_READY;
break;
case 'p':
input_tx = optarg;
break;
case '2':
mode |= SPI_TX_DUAL;
break;
@ -222,6 +253,9 @@ int main(int argc, char *argv[])
{
int ret = 0;
int fd;
uint8_t *tx;
uint8_t *rx;
int size;
parse_opts(argc, argv);
@ -266,7 +300,17 @@ int main(int argc, char *argv[])
printf("bits per word: %d\n", bits);
printf("max speed: %d Hz (%d KHz)\n", speed, speed/1000);
transfer(fd);
if (input_tx) {
size = strlen(input_tx+1);
tx = malloc(size);
rx = malloc(size);
size = unespcape((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);