基于STM32F407 HAL库的SPI通信代码

以下是基于STM32F407 HAL库的SPI通信代码示例：

#include "stm32f4xx_hal.h"

#define SPI_TIMEOUT_MS 1000

void SPI_Init(void)
{
    /* SPI2 GPIO Configuration */
    /* PA10 -> SPI2_SCK */
    /* PB14 -> SPI2_MISO */
    /* PB15 -> SPI2_MOSI */
    GPIO_InitTypeDef GPIO_InitStruct = {0};
    __HAL_RCC_GPIOA_CLK_ENABLE();
    __HAL_RCC_GPIOB_CLK_ENABLE();
    GPIO_InitStruct.Pin = GPIO_PIN_10;
    GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
    GPIO_InitStruct.Pull = GPIO_NOPULL;
    GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
    GPIO_InitStruct.Alternate = GPIO_AF5_SPI2;
    HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
    GPIO_InitStruct.Pin = GPIO_PIN_14 | GPIO_PIN_15;
    HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);

    /* SPI2 Configuration */
    SPI_HandleTypeDef hspi2 = {0};
    __HAL_RCC_SPI2_CLK_ENABLE();
    hspi2.Instance = SPI2;
    hspi2.Init.Mode = SPI_MODE_MASTER;
    hspi2.Init.Direction = SPI_DIRECTION_2LINES;
    hspi2.Init.DataSize = SPI_DATASIZE_8BIT;
    hspi2.Init.CLKPolarity = SPI_POLARITY_HIGH;
    hspi2.Init.CLKPhase = SPI_PHASE_2EDGE;
    hspi2.Init.NSS = SPI_NSS_SOFT;
    hspi2.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_16;
    hspi2.Init.FirstBit = SPI_FIRSTBIT_MSB;
    hspi2.Init.TIMode = SPI_TIMODE_DISABLE;
    hspi2.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
    hspi2.Init.CRCPolynomial = 10;
    HAL_SPI_Init(&hspi2);
}

void SPI_WriteByte(uint8_t data)
{
    HAL_SPI_Transmit(&hspi2, &data, 1, SPI_TIMEOUT_MS);
}

uint8_t SPI_ReadByte(void)
{
    uint8_t data = 0;
    HAL_SPI_Receive(&hspi2, &data, 1, SPI_TIMEOUT_MS);
    return data;
}

void SPI_WriteBuffer(uint8_t* data, uint16_t size)
{
    HAL_SPI_Transmit(&hspi2, data, size, SPI_TIMEOUT_MS);
}

void SPI_ReadBuffer(uint8_t* data, uint16_t size)
{
    HAL_SPI_Receive(&hspi2, data, size, SPI_TIMEOUT_MS);
}

该代码初始化了SPI2为主模式，使用了PA10、PB14和PB15作为SPI2的SCK、MISO和MOSI引脚。同时提供了写入字节和缓冲区以及读取字节和缓冲区的函数。在使用时，需要先调用`SPI_Init()`函数进行初始化，然后就可以使用相应的SPI读写函数了。