lib_spi.h

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#ifndef LINUX_LIBV2_SOURCE_SPI_LIB_SPI_H_
#define LINUX_LIBV2_SOURCE_SPI_LIB_SPI_H_

// Copyright 2024

#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <string.h>
#include <linux/spi/spidev.h>
#include <sys/ioctl.h>

static unsigned int mode = 0x0;
static unsigned char bits = 8;      //8位
static unsigned int speed = 500000; //500kHz

#ifdef __cplusplus
#define SPI_API extern "C"
#else
#define SPI_API
#endif

    SPI_API int set_spi_mode(int fd, unsigned short mode);
    SPI_API int set_spi_bits_per_word(int fd, unsigned short bits);
    SPI_API int set_spi_max_transfer_speed(int fd, unsigned int speed);
    SPI_API int spi_message_transfer(int fd, unsigned char *sendBuf, int send_len, unsigned char *recvBuf, int recv_len);
    SPI_API int spi_message_send(int fd, unsigned char *sendBuf, int len);

#endif