diff options
| author | Adrian Remonda | 2015-03-10 16:12:30 -0400 |
|---|---|---|
| committer | Mark Brown | 2015-03-10 20:49:21 +0000 |
| commit | b78ce7ed54093e5e63d4f5d7cbdc3f7d42ebbd5c (patch) | |
| tree | 1afb464cdca93e499fb4e00043e5d8de63df0e9c /Documentation | |
| parent | c517d838eb7d07bbe9507871fab3931deccff539 (diff) | |
spi: spidev_test: Cleaned hexadecimal dump
Signed-off-by: Adrian Remonda <adrianremonda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/spi/spidev_test.c | 35 |
1 files changed, 29 insertions, 6 deletions
diff --git a/Documentation/spi/spidev_test.c b/Documentation/spi/spidev_test.c index 3a2f9d59edab..9cb09184a3d6 100644 --- a/Documentation/spi/spidev_test.c +++ b/Documentation/spi/spidev_test.c @@ -15,6 +15,7 @@ #include <unistd.h> #include <stdio.h> #include <stdlib.h> +#include <string.h> #include <getopt.h> #include <fcntl.h> #include <sys/ioctl.h> @@ -35,6 +36,33 @@ static uint8_t bits = 8; static uint32_t speed = 500000; static uint16_t delay; +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); + } + } +} + static void transfer(int fd) { int ret; @@ -76,12 +104,7 @@ static void transfer(int fd) if (ret < 1) pabort("can't send spi message"); - for (ret = 0; ret < ARRAY_SIZE(tx); ret++) { - if (!(ret % 6)) - puts(""); - printf("%.2X ", rx[ret]); - } - puts(""); + hex_dump(rx, ARRAY_SIZE(rx), 32, "RX"); } static void print_usage(const char *prog) |