spi HAL库使用示例

以下是SPI HAL库的使用示例：

1. 初始化SPI

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;
HAL_SPI_Init(&hspi);

2. 发送和接收数据

uint8_t txData[5] = {0x01, 0x02, 0x03, 0x04, 0x05};
uint8_t rxData[5];

HAL_SPI_TransmitReceive(&hspi, txData, rxData, 5, HAL_MAX_DELAY);

3. 使用DMA传输数据

uint8_t txData[5] = {0x01, 0x02, 0x03, 0x04, 0x05};
uint8_t rxData[5];

HAL_SPI_TransmitReceive_DMA(&hspi, txData, rxData, 5);

4. 使用中断传输数据

uint8_t txData[5] = {0x01, 0x02, 0x03, 0x04, 0x05};
uint8_t rxData[5];

HAL_SPI_TransmitReceive_IT(&hspi, txData, rxData, 5);

5. 使用轮询模式传输数据

uint8_t txData[5] = {0x01, 0x02, 0x03, 0x04, 0x05};
uint8_t rxData[5];

HAL_SPI_TransmitReceive(&hspi, txData, rxData, 5, HAL_MAX_DELAY);