Please help me.
My code
SPI Master Code----------------------
Initialization
/* SPI4 init function */
void MX_SPI4_Init(void)
{
hspi4.Instance = SPI4;
hspi4.Init.Mode = SPI_MODE_MASTER;
hspi4.Init.Direction = SPI_DIRECTION_2LINES;
hspi4.Init.DataSize = SPI_DATASIZE_16BIT;
hspi4.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi4.Init.CLKPhase = SPI_PHASE_2EDGE;
hspi4.Init.NSS = SPI_NSS_SOFT;
hspi4.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_8;
hspi4.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi4.Init.TIMode = SPI_TIMODE_DISABLE;
hspi4.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi4.Init.CRCPolynomial = 7;
hspi4.Init.CRCLength = SPI_CRC_LENGTH_DATASIZE;
hspi4.Init.NSSPMode = SPI_NSS_PULSE_DISABLE;
if (HAL_SPI_Init(&hspi4) != HAL_OK)
{
Error_Handler();
}
}
void HAL_SPI_MspInit(SPI_HandleTypeDef* spiHandle)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(spiHandle->Instance==SPI4)
{
/* USER CODE BEGIN SPI4_MspInit 0 */
/* USER CODE END SPI4_MspInit 0 */
/* SPI4 clock enable */
__HAL_RCC_SPI4_CLK_ENABLE();
__HAL_RCC_GPIOE_CLK_ENABLE();
/**SPI4 GPIO Configuration
PE2 ------> SPI4_SCK
PE5 ------> SPI4_MISO
PE6 ------> SPI4_MOSI
*/
GPIO_InitStruct.Pin = GPIO_PIN_2|GPIO_PIN_5|GPIO_PIN_6;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF5_SPI4;
HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
/* USER CODE BEGIN SPI4_MspInit 1 */
/* USER CODE END SPI4_MspInit 1 */
}
}
Main code
while (1)
{
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
HAL_Delay(4000);
spiDataTx[0]++;
HAL_GPIO_WritePin(GPIOF, GPIO_PIN_4, GPIO_PIN_RESET);
HAL_SPI_Transmit(&hspi4, (uint8_t *)spiDataTx, 1, HAL_MAX_DELAY);
while(HAL_SPI_GetState(&hspi4)!=HAL_SPI_STATE_READY){}
HAL_SPI_Receive(&hspi4, (uint8_t *)spiDataRx, 1, HAL_MAX_DELAY);
HAL_GPIO_WritePin(GPIOF, GPIO_PIN_4, GPIO_PIN_SET);
//HAL_SPI_FlushRxFifo(&hspi4);
}
/* USER CODE END 3 */
Slave code-----------------
Initialization
/* SPI2 init function */
void MX_SPI2_Init(void)
{
hspi2.Instance = SPI2;
hspi2.Init.Mode = SPI_MODE_SLAVE;
hspi2.Init.Direction = SPI_DIRECTION_2LINES;
hspi2.Init.DataSize = SPI_DATASIZE_16BIT;
hspi2.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi2.Init.CLKPhase = SPI_PHASE_2EDGE;
hspi2.Init.NSS = SPI_NSS_HARD_INPUT;
hspi2.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi2.Init.TIMode = SPI_TIMODE_DISABLE;
hspi2.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi2.Init.CRCPolynomial = 7;
hspi2.Init.CRCLength = SPI_CRC_LENGTH_DATASIZE;
hspi2.Init.NSSPMode = SPI_NSS_PULSE_DISABLE;
if (HAL_SPI_Init(&hspi2) != HAL_OK)
{
Error_Handler();
}
}
void HAL_SPI_MspInit(SPI_HandleTypeDef* spiHandle)
{
GPIO_InitTypeDef GPIO_InitStruct = {0};
if(spiHandle->Instance==SPI2)
{
/* USER CODE BEGIN SPI2_MspInit 0 */
/* USER CODE END SPI2_MspInit 0 */
/* SPI2 clock enable */
__HAL_RCC_SPI2_CLK_ENABLE();
__HAL_RCC_GPIOB_CLK_ENABLE();
/**SPI2 GPIO Configuration
PB12 ------> SPI2_NSS
PB13 ------> SPI2_SCK
PB14 ------> SPI2_MISO
PB15 ------> SPI2_MOSI
*/
GPIO_InitStruct.Pin = GPIO_PIN_12|GPIO_PIN_13|GPIO_PIN_14|GPIO_PIN_15;
GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
GPIO_InitStruct.Pull = GPIO_NOPULL;
GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH;
GPIO_InitStruct.Alternate = GPIO_AF0_SPI2;
HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
/* SPI2 interrupt Init */
HAL_NVIC_SetPriority(SPI2_IRQn, 0, 0);
HAL_NVIC_EnableIRQ(SPI2_IRQn);
/* USER CODE BEGIN SPI2_MspInit 1 */
/* USER CODE END SPI2_MspInit 1 */
}
}
main code-------------------
/* Initialize all configured peripherals */
MX_GPIO_Init();
MX_SPI2_Init();
/* USER CODE BEGIN 2 */
HAL_SPI_Receive_IT(&hspi2, (uint8_t *)spiDataRx, 1);
/* USER CODE END 2 */
/* Infinite loop */
/* USER CODE BEGIN WHILE */
while (1)
{
if(spiRxStatus){
HAL_SPI_Transmit(&hspi2, (uint8_t *)spiDataRx, 1, HAL_MAX_DELAY);
HAL_SPI_Receive_IT(&hspi2, (uint8_t *)spiDataRx, 1);
spiRxStatus=0;
}
/* USER CODE END WHILE */
/* USER CODE BEGIN 3 */
}
SPI Rx callback-------------------
void HAL_SPI_RxCpltCallback(SPI_HandleTypeDef *hspi)
{
/* Prevent unused argument(s) compilation warning */
UNUSED(hspi);
spiRxStatus=1;
/* NOTE : This function should not be modified, when the callback is needed,
the HAL_SPI_RxCpltCallback should be implemented in the user file
*/
}
