stm32f072 spi代码

以下是基于HAL库的STM32F072 SPI驱动代码示例：

#include "stm32f0xx_hal.h"

/* SPI handle declaration */
SPI_HandleTypeDef hspi;

/* SPI GPIO configuration */
void MX_SPI_Init(void)
{
  GPIO_InitTypeDef GPIO_InitStruct;

  /* GPIO Ports Clock Enable */
  __GPIOA_CLK_ENABLE();

  /* Configure SPI SCK, MOSI and MISO pins */
  GPIO_InitStruct.Pin = GPIO_PIN_5|GPIO_PIN_6|GPIO_PIN_7;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_NOPULL;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF0_SPI1;
  HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);

  /* SPI configuration */
  hspi.Instance = SPI1;
  hspi.Init.Mode = SPI_MODE_MASTER;
  hspi.Init.Direction = SPI_DIRECTION_2LINES;
  hspi.Init.DataSize = SPI_DATASIZE_8BIT;
  hspi.Init.CLKPolarity = SPI_POLARITY_LOW;
  hspi.Init.CLKPhase = SPI_PHASE_1EDGE;
  hspi.Init.NSS = SPI_NSS_SOFT;
  hspi.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_256;
  hspi.Init.FirstBit = SPI_FIRSTBIT_MSB;
  hspi.Init.TIMode = SPI_TIMODE_DISABLED;
  hspi.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLED;
  hspi.Init.CRCPolynomial = 7;
  HAL_SPI_Init(&hspi);
}

/* SPI write function */
void SPI_Write(uint8_t *pData, uint16_t Size)
{
  HAL_SPI_Transmit(&hspi, pData, Size, HAL_MAX_DELAY);
}

/* SPI read function */
void SPI_Read(uint8_t *pData, uint16_t Size)
{
  HAL_SPI_Receive(&hspi, pData, Size, HAL_MAX_DELAY);
}

/* SPI write and read function */
void SPI_WriteRead(uint8_t *pTxData, uint8_t *pRxData, uint16_t Size)
{
  HAL_SPI_TransmitReceive(&hspi, pTxData, pRxData, Size, HAL_MAX_DELAY);
}

该代码实现了SPI1作为主设备，使用PA5、PA6、PA7分别作为SPI的时钟、数据输出和数据输入引脚，并且使用HAL库的相关API实现了SPI数据的发送和接收功能。只需根据具体的需求修改SPI的配置参数即可。