spi: spidev_test: output to a file (983b2788) · Commits · 戴 / test

tools/spi/spidev_test.c

+23 −3

Original line number	Diff line number	Diff line
		@@ -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,
		@@ -136,6 +137,20 @@ static void transfer(int fd, uint8_t const tx, uint8_t const rx, size_t len)

		if (verbose)
		hex_dump(tx, len, 32, "TX");

		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");
		}

		@@ -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;

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