hal spi通信 及代码
时间: 2023-06-16 19:03:43 浏览: 55
HAL库是针对不同芯片的HAL库,因此在不同的芯片上会有不同的代码实现。以下是一些通用的SPI HAL库代码示例:
## 初始化SPI
```c
SPI_HandleTypeDef hspi;
void SPI_Init(void)
{
hspi.Instance = SPIx;
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 = 7;
HAL_SPI_Init(&hspi);
}
```
## SPI读写数据
```c
uint8_t SPI_ReadWriteByte(uint8_t data)
{
uint8_t receive_data;
HAL_SPI_TransmitReceive(&hspi, &data, &receive_data, 1, 0xff);
return receive_data;
}
```
## SPI写数据
```c
void SPI_WriteByte(uint8_t data)
{
HAL_SPI_Transmit(&hspi, &data, 1, 0xff);
}
```
## SPI读数据
```c
uint8_t SPI_ReadByte(void)
{
uint8_t data, receive_data;
data = 0xff;
HAL_SPI_TransmitReceive(&hspi, &data, &receive_data, 1, 0xff);
return receive_data;
}
```
需要注意的是,以上代码示例仅供参考,具体实现还需根据芯片型号和具体应用场景进行调整。