Hello , i would like to receive data via SPI . i tried to use getting data from AD7606 via HAL_SPI_Receive_dma , but i always failed. i do not know which step i miss or wrong . Could you give me hint or solution? Thanks for very much .
int main(void)
{
HAL_Init();
SystemClock_Config();
MX_GPIO_Init();
MX_DMA_Init();
MX_SPI1_Init();
MX_SPI2_Init();
MX_TIM7_Init();
MX_USART2_UART_Init();
/* Init scheduler */
osKernelInitialize();
/*handle */
SendTaskHandle = osThreadNew(SendTaskFun, NULL, &SendTask_attributes);
ReceiveTaskHandle = osThreadNew(ReceiveTaskFun, NULL, &ReceiveTask_attributes);
osKernelStart();
while (1) {
}
}
static void MX_SPI1_Init(void)
{
/* SPI1 parameter configuration*/
hspi1.Instance = SPI1;
hspi1.Init.Mode = SPI_MODE_MASTER;
hspi1.Init.Direction = SPI_DIRECTION_2LINES;
hspi1.Init.DataSize = SPI_DATASIZE_8BIT;
hspi1.Init.CLKPolarity = SPI_POLARITY_LOW;
hspi1.Init.CLKPhase = SPI_PHASE_1EDGE;
hspi1.Init.NSS = SPI_NSS_SOFT;
hspi1.Init.BaudRatePrescaler = SPI_BAUDRATEPRESCALER_2;
hspi1.Init.FirstBit = SPI_FIRSTBIT_MSB;
hspi1.Init.TIMode = SPI_TIMODE_DISABLE;
hspi1.Init.CRCCalculation = SPI_CRCCALCULATION_DISABLE;
hspi1.Init.CRCPolynomial = 10;
if (HAL_SPI_Init(&hspi1) != HAL_OK)
{
Error_Handler();
}
}
static void MX_DMA_Init(void)
{
/* DMA controller clock enable */
__HAL_RCC_DMA1_CLK_ENABLE();
__HAL_RCC_DMA2_CLK_ENABLE();
/* DMA interrupt init */
/* DMA1_Stream4_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA1_Stream4_IRQn, 5, 0);
HAL_NVIC_EnableIRQ(DMA1_Stream4_IRQn);
/* DMA2_Stream0_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA2_Stream0_IRQn, 5, 0);
HAL_NVIC_EnableIRQ(DMA2_Stream0_IRQn);
/* DMA2_Stream3_IRQn interrupt configuration */
HAL_NVIC_SetPriority(DMA2_Stream3_IRQn, 5, 0);
HAL_NVIC_EnableIRQ(DMA2_Stream3_IRQn);
}
** Note
DMA2_Stream0 - > SPI1 Receive
DMA2_Stream3 - > SPI1 Transmit
DMA1_Stream4 - > SPI2 Transmit
void ReceiveTaskFun(void *argument)
{
uint8_t receive_buffer[256] ;
for (;;) {
//-- Enable CS
HAL_GPIO_WritePin(GPIO_A, GPIO_PIN_7, 0); //-- cs=0 active low
//- - SPI2_DMA_receive
...... (Here is for receive data from AD7606 )
HAL_SPI_Receive_DMA(&hspi1, receive_buffer, 8);
}
// From stm32f4XX_it.c
void DMA2_Stream0_IRQHandler(void)
{
/* USER CODE BEGIN DMA2_Stream0_IRQn 0 */
/* USER CODE END DMA2_Stream0_IRQn 0 */
HAL_DMA_IRQHandler(&hdma_spi1_rx);
/* USER CODE BEGIN DMA2_Stream0_IRQn 1 */
DMA2->LISR |= 1<< 26;
/* USER CODE END DMA2_Stream0_IRQn 1 */
}
//From main.c function
void HAL_SPI_RxCpltCallback(SPI_HandleTypeDef *hspi)
{
if (hspi->Instance == SPI1){
HAL_GPIO_WritePin(GPIO_A, GPIO_PIN_7, 1); //-- cs=1 deactive
}
}
There is my code , I abbreviated the code. If some important codes that i did not paste on it , please tell me .
i refer DMA controller manual and stm32 f407 reference manual
- 4.2 DMA flag management before enabling a new transfer Before enabling a new transfer, the user must ensure that the Transfer Complete Interrupt Flag (TCIF) in DMA_LISR or DMA_HISR is cleared. As a general recommendation, it is advised to clear all flags in the DMA_LIFCR and DMA_HIFCR registers before starting a new transfer.
Then , I set TCIF3(bit 27 ) to 1 after HAL_SPI_RxCpltCallback . But It worked only one time, the second dma receive did not perform. Did i miss any information about SPI_DMA? :\
