stm32 spi通信
时间: 2023-10-01 19:08:02 浏览: 38
STM32的SPI通信是一种串行通信协议,可以用于连接微控制器和外设。下面是一个简单的SPI通信的代码示例:
首先需要定义SPI的参数:
```c
SPI_HandleTypeDef hspi;
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_DISABLE;
hspi.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi.Init.CRCPolynomial = 10;
```
然后初始化SPI:
```c
HAL_SPI_Init(&hspi);
```
发送数据:
```c
uint8_t data_out = 0x05;
HAL_SPI_Transmit(&hspi, &data_out, 1, 100);
```
接收数据:
```c
uint8_t data_in;
HAL_SPI_Receive(&hspi, &data_in, 1, 100);
```
以上代码仅供参考,具体实现需要根据具体的应用场景进行调整。