spi: spidev_test: Cleaned hexadecimal dump
Signed-off-by: Adrian Remonda <adrianremonda@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
diff --git a/Documentation/spi/spidev_test.c b/Documentation/spi/spidev_test.c
index 3a2f9d5..9cb0918 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 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 @@
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)