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spi: spidev_test: output to a file

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For testing of larger data transfers, output unmodified data
directly to a file.

Signed-off-by: Joshua Clayton <stillcompiling@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Joshua Clayton 2015-11-18 14:30:40 -08:00 committed by Mark Brown
parent 7af475a5b5
commit 983b27886a
1 changed files with 23 additions and 3 deletions
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26
tools/spi/spidev_test.c
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@ -35,6 +35,7 @@ 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;
@ -105,7 +106,7 @@ static int unescape(char *_dst, char *_src, size_t len)
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,
@ -136,7 +137,21 @@ static void transfer(int fd, uint8_t const *tx, uint8_t const *rx, size_t len)
if (verbose)
hex_dump(tx, len, 32, "TX");
hex_dump(rx, len, 32, "RX");
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 utput file");
close(out_fd);
}
if (verbose || !output_file)
hex_dump(rx, len, 32, "RX");
}
static void print_usage(const char *prog)
@ -147,6 +162,7 @@ static void print_usage(const char *prog)
" -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"
@ -171,6 +187,7 @@ static void parse_opts(int argc, char *argv[])
{ "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' },
@ -186,7 +203,7 @@ static void parse_opts(int argc, char *argv[])
};
int c;
c = getopt_long(argc, argv, "D:s:d:b:i:lHOLC3NR24p:v",
c = getopt_long(argc, argv, "D:s:d:b:i:o:lHOLC3NR24p:v",
lopts, NULL);
if (c == -1)
@ -208,6 +225,9 @@ static void parse_opts(int argc, char *argv[])
case 'i':
input_file = optarg;
break;
case 'o':
output_file = optarg;
break;
case 'l':
mode |= SPI_LOOP;
break;