96 lines
2.1 KiB
C++
96 lines
2.1 KiB
C++
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/*
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* Copyright 2020 NXP
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* Copyright 2021 ACRIOS Systems s.r.o.
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* All rights reserved.
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*
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include "erpc_spidev.h"
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#include <errno.h>
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#include <fcntl.h>
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#include <linux/spi/spidev.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/ioctl.h>
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#include <unistd.h>
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int spidev_open(const char *port)
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{
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int fd;
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fd = open(port, O_RDWR);
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if (-1 == fd)
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{
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(void)fprintf(stderr, "Could not open spidev port (%d).\r\n", errno);
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}
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return fd;
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}
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int spidev_set_mode(int fd, unsigned char mode)
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{
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int retVal = ERPC_SPIDEV_STATUS_SUCCESS;
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if (-1 == ioctl(fd, SPI_IOC_WR_MODE, &mode))
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{
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(void)fprintf(stderr, "Could not set mode for spidev port (%d).\r\n", errno);
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retVal = ERPC_SPIDEV_STATUS_FAIL;
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}
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return retVal;
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}
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int spidev_set_speed(int fd, unsigned int speed_hz)
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{
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int retVal = ERPC_SPIDEV_STATUS_SUCCESS;
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if (-1 == ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &speed_hz))
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{
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(void)fprintf(stderr, "Could not set max speed for spidev port (%d).\r\n", errno);
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retVal = ERPC_SPIDEV_STATUS_FAIL;
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}
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return retVal;
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}
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int spidev_set_wordbits(int fd, unsigned char bits)
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{
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int retVal = ERPC_SPIDEV_STATUS_SUCCESS;
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if (-1 == ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &bits))
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{
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(void)fprintf(stderr, "Could not set bits per word for spidev port (%d).\r\n", errno);
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retVal = ERPC_SPIDEV_STATUS_FAIL;
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}
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return retVal;
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}
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int spidev_transfer(int fd, const unsigned char *tx_buf, unsigned char *rx_buf, unsigned int len)
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{
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int retVal = ERPC_SPIDEV_STATUS_SUCCESS;
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struct spi_ioc_transfer spi_message;
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(void)memset(&spi_message, 0, sizeof(spi_message));
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spi_message.tx_buf = (unsigned long)tx_buf;
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spi_message.rx_buf = (unsigned long)rx_buf;
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spi_message.len = len;
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if (-1 == ioctl(fd, SPI_IOC_MESSAGE(1), &spi_message))
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{
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(void)fprintf(stderr, "Could not transfer data on spidev port (%d).\r\n", errno);
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retVal = ERPC_SPIDEV_STATUS_FAIL;
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}
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return retVal;
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}
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int spidev_close(int fd)
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{
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close(fd);
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return ERPC_SPIDEV_STATUS_SUCCESS;
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}
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