How to set to spi slave mode

_JJANG · September 29, 2020, 2:18am

Thank you for answering.

I tried testing the slave mode as indicated, but I got an’invalid option’ error.
I downloaded the source from this link and tested it.

github.com

torvalds/linux/blob/master/tools/spi/spidev_test.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * SPI testing utility (using spidev driver)
 *
 * Copyright (c) 2007  MontaVista Software, Inc.
 * Copyright (c) 2007  Anton Vorontsov <avorontsov@ru.mvista.com>
 *
 * Cross-compile with cross-gcc -I/path/to/cross-kernel/include
 */

#include <stdint.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <getopt.h>
#include <fcntl.h>
#include <time.h>
#include <sys/ioctl.h>

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As you told me, how do I get ./spidev_test -D /dev/spidev0.0 -s 150000 -n100 -g30 -p4 -z to run?