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STM32F410R8 SPI DMA not reading

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JPeña.1
Associate II

‎2021-03-11 01:51 AM

I've configured the SPI to work with DMA. The microcontroller is sending but is not reading. I have checked the configuration and I cannot see the problem. Can you see something strange in my code.

I've tested this code in an STM32F429-DISCO board and works.

This is the peripheral definition.

  #define SPI_BCC                           SPI1
  #define SPI_BCC_CLK                       RCC_APB2Periph_SPI1
	#define SPI_BCC_CLK_EN                    RCC_APB2PeriphClockCmd(SPI_BCC_CLK, ENABLE)
 
 
  #define SPI_BCC_SCK_PIN                   GPIO_Pin_3
  #define SPI_BCC_SCK_GPIO_PORT             GPIOB
  #define SPI_BCC_SCK_GPIO_CLK              RCC_AHB1Periph_GPIOB
  #define SPI_BCC_SCK_SOURCE                GPIO_PinSource3
  #define SPI_BCC_SCK_AF                    GPIO_AF_SPI1
 
  #define SPI_BCC_MISO_PIN                  GPIO_Pin_4
  #define SPI_BCC_MISO_GPIO_PORT            GPIOB
  #define SPI_BCC_MISO_GPIO_CLK             RCC_AHB1Periph_GPIOB
  #define SPI_BCC_MISO_SOURCE               GPIO_PinSource4
  #define SPI_BCC_MISO_AF                   GPIO_AF_SPI1
 
  #define SPI_BCC_MOSI_PIN                  GPIO_Pin_5
  #define SPI_BCC_MOSI_GPIO_PORT            GPIOB
  #define SPI_BCC_MOSI_GPIO_CLK             RCC_AHB1Periph_GPIOB
  #define SPI_BCC_MOSI_SOURCE               GPIO_PinSource5
  #define SPI_BCC_MOSI_AF                   GPIO_AF_SPI1
	
  #define SPI_BCC_CS1_PIN                  	GPIO_Pin_11
  #define SPI_BCC_CS1_GPIO_PORT            	GPIOB
  #define SPI_BCC_CS1_GPIO_CLK             	RCC_AHB1Periph_GPIOB
	
  #define SPI_BCC_CS2_PIN                  	GPIO_Pin_12
  #define SPI_BCC_CS2_GPIO_PORT            	GPIOC
  #define SPI_BCC_CS2_GPIO_CLK             	RCC_AHB1Periph_GPIOC
	
  #define SPI_BCC_CS3_PIN                  	GPIO_Pin_11
  #define SPI_BCC_CS3_GPIO_PORT            	GPIOC
  #define SPI_BCC_CS3_GPIO_CLK             	RCC_AHB1Periph_GPIOC
	
  #define SPI_BCC_CS4_PIN                  	GPIO_Pin_10
  #define SPI_BCC_CS4_GPIO_PORT            	GPIOC
  #define SPI_BCC_CS4_GPIO_CLK             	RCC_AHB1Periph_GPIOC
	
  #define SPI_BCC_CS5_PIN                  	GPIO_Pin_15
  #define SPI_BCC_CS5_GPIO_PORT            	GPIOA
  #define SPI_BCC_CS5_GPIO_CLK             	RCC_AHB1Periph_GPIOA
	
  #define SPI_BCC_CS6_PIN                  	GPIO_Pin_15
  #define SPI_BCC_CS6_GPIO_PORT            	GPIOA
  #define SPI_BCC_CS6_GPIO_CLK             	RCC_AHB1Periph_GPIOA
	
	#define DMA_BUFFER_SIZE              			6
	
  #define SPI1_DMA                       		DMA2
  #define SPI1_DMA_CLK                   		RCC_AHB1Periph_DMA2
  #define SPI1_TX_DMA_CHANNEL           		DMA_Channel_3
  #define SPI1_TX_DMA_STREAM           		  DMA2_Stream3
  #define SPI1_TX_DMA_FLAG_TCIF          		DMA_FLAG_TCIF3
  #define SPI1_RX_DMA_CHANNEL        		    DMA_Channel_3
  #define SPI1_RX_DMA_STREAM           		  DMA2_Stream2
  #define SPI1_RX_DMA_FLAG_TCIF        	  	DMA_FLAG_TCIF3

This is the configuration:

static void SPI_BCC_Config(void)
{	
	/* Structure definition */
  GPIO_InitTypeDef GPIO_InitStructure;
	SPI_InitTypeDef  SPI_InitStructure;
  DMA_InitTypeDef  DMA_InitStructure;
 
  /* Peripheral Clock Enable -------------------------------------------------*/
  /* Enable the SPI clock */
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
 
  /* Enable GPIO clocks */
  RCC_AHB1PeriphClockCmd(SPI_BCC_SCK_GPIO_CLK | SPI_BCC_MISO_GPIO_CLK | SPI_BCC_MOSI_GPIO_CLK, ENABLE);
	
  /* Enable DMA clock */
  RCC_AHB1PeriphClockCmd(SPI1_DMA_CLK, ENABLE);
 
  /* SPI GPIO Configuration --------------------------------------------------*/
  /* GPIO Deinitialisation */
  GPIO_DeInit(SPI_BCC_SCK_GPIO_PORT);
  GPIO_DeInit(SPI_BCC_MISO_GPIO_PORT);
  GPIO_DeInit(SPI_BCC_MOSI_GPIO_PORT);
  
  /* Connect SPI pins to AF1 */  
  GPIO_PinAFConfig(SPI_BCC_SCK_GPIO_PORT, SPI_BCC_SCK_SOURCE, SPI_BCC_SCK_AF);
  GPIO_PinAFConfig(SPI_BCC_MISO_GPIO_PORT, SPI_BCC_MISO_SOURCE, SPI_BCC_MISO_AF);    
  GPIO_PinAFConfig(SPI_BCC_MOSI_GPIO_PORT, SPI_BCC_MOSI_SOURCE, SPI_BCC_MOSI_AF);
 
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_25MHz;
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;
  GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_DOWN;
 
  /* SPI SCK pin configuration */
  GPIO_InitStructure.GPIO_Pin = SPI_BCC_SCK_PIN;
  GPIO_Init(SPI_BCC_SCK_GPIO_PORT, &GPIO_InitStructure);
  
 
  /* SPI  MOSI pin configuration */
  GPIO_InitStructure.GPIO_Pin =  SPI_BCC_MOSI_PIN;
  GPIO_Init(SPI_BCC_MOSI_GPIO_PORT, &GPIO_InitStructure);
	
	  /* SPI  MISO pin configuration */
	//GPIO_InitStructure.GPIO_PuPd  = GPIO_PuPd_NOPULL;
	//GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
  GPIO_InitStructure.GPIO_Pin =  SPI_BCC_MISO_PIN;
  GPIO_Init(SPI_BCC_MISO_GPIO_PORT, &GPIO_InitStructure); 
 
  /* SPI configuration -------------------------------------------------------*/
  SPI_I2S_DeInit(SPI_BCC);
  SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
  SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
  SPI_InitStructure.SPI_CPOL = SPI_CPOL_Low;
  SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;
  SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;
  SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_128;
  SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
	SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
  SPI_InitStructure.SPI_CRCPolynomial = 7;
	
  /* Initializes the SPI configuration */
  SPI_Init(SPI_BCC, &SPI_InitStructure);
	
  /* DMA configuration -------------------------------------------------------*/
  /* Deinitialize DMA Streams */
  DMA_DeInit(SPI1_TX_DMA_STREAM);
  DMA_DeInit(SPI1_RX_DMA_STREAM);
  
  /* Configure DMA Initialization Structure */
  DMA_InitStructure.DMA_BufferSize = DMA_BUFFER_SIZE ;
  DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable ;
  DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_1QuarterFull ;
  DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single ;
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
  DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
  DMA_InitStructure.DMA_PeripheralBaseAddr =(uint32_t) (&(SPI1->DR)) ;
  DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;
  /* Configure TX DMA */
  DMA_InitStructure.DMA_Channel = SPI1_TX_DMA_CHANNEL ;
  DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral ;
  DMA_InitStructure.DMA_Memory0BaseAddr =(uint32_t)DMA_SPIBufferTx ;
  DMA_Init(SPI1_TX_DMA_STREAM, &DMA_InitStructure);
  /* Configure RX DMA */
  DMA_InitStructure.DMA_Channel = SPI1_RX_DMA_CHANNEL ;
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory ;
  DMA_InitStructure.DMA_Memory0BaseAddr =(uint32_t)DMA_SPIBufferRx ; 
  DMA_Init(SPI1_RX_DMA_STREAM, &DMA_InitStructure);	
	
	/* Enable the SPI peripheral */
  SPI_Cmd(SPI_BCC, ENABLE);
 
}

And this is what handles the transfer and reception:

bcc_status_t BCC_MCU_TransferSpi(uint8_t dev, uint8_t transBuf[], uint8_t recvBuf[])
{  
		
	/*Copy Frame to buffer*/
	for (SPI_Buf_idx = 0; SPI_Buf_idx < DMA_BUFFER_SIZE; SPI_Buf_idx++) 
	{ 
			 DMA_SPIBufferTx[SPI_Buf_idx] = transBuf[SPI_Buf_idx];
	}
 
	/*Set Chip select to LOW level*/
	BCC_MCU_WriteCsbPin(dev, 0);
	
	/*Enable DMA transfer*/
	DMA_Cmd(SPI1_TX_DMA_STREAM, ENABLE);
	DMA_Cmd(SPI1_RX_DMA_STREAM, ENABLE);
	
	/* Enable SPI DMA TX Request */
	SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx, ENABLE);
	/* Enable SPI DMA RX Request */
	SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Rx, ENABLE);
	
	/* Waiting the end of Data transfer */
	while (SPI1_TX_DMA_STREAM->NDTR==RESET)DONOTHING()
	while(SPI_GetFlagStatus(SPI_BCC,SPI_FLAG_BSY)== SET)DONOTHING()
	
	/* Clear DMA Transfer Complete Flags */
	DMA_ClearFlag(SPI1_TX_DMA_STREAM,SPI1_TX_DMA_FLAG_TCIF);
	DMA_ClearFlag(SPI1_RX_DMA_STREAM,SPI1_RX_DMA_FLAG_TCIF);  
	
	/* Disable DMA SPI TX Stream */
	DMA_Cmd(SPI1_TX_DMA_STREAM,DISABLE);
	/* Disable DMA SPI RX Stream */
	DMA_Cmd(SPI1_RX_DMA_STREAM,DISABLE);  
	
	/* Disable SPI DMA TX Requsts */
	SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx, DISABLE);
	/* Disable SPI DMA RX Requsts */
	SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Rx, DISABLE);
	
	/*Set Chip select to HIGH level*/
	BCC_MCU_WriteCsbPin(dev, 1);	
	
	//Flush_RxBuffer();
 
	/* Store received data to recvBuf. */
	for (SPI_Buf_idx = 0; SPI_Buf_idx < DMA_BUFFER_SIZE; SPI_Buf_idx++) 
	{ 
			recvBuf[SPI_Buf_idx]= DMA_SPIBufferRx[SPI_Buf_idx];
			//printf("0x%x ",DMA_SPIBufferRx[SPI_Buf_idx]);
			
	}
	//printf("\n\r");
	return BCC_STATUS_SUCCESS;
			
}

I cannot see were the problem is. I have suspicions on the flags but I cannot see what is wrong.

Thank you in advance.

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JPeña.1
Associate II

‎2021-03-11 03:44 AM

Problem solved by itself.

After commenting and uncommenting a few lines, the reception started working so my guess is that it was a problem from the IDE.

The code posted above works in case someone needs an example.

Thanks.

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waclawek.jan
Guru

‎2021-03-11 02:07 AM

I don't attempt to understand your code, but

> #define SPI1_TX_DMA_FLAG_TCIF DMA_FLAG_TCIF3

> #define SPI1_RX_DMA_FLAG_TCIF DMA_FLAG_TCIF3

is suspicious.

JW

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JPeña.1
Associate II
In response to waclawek.jan

‎2021-03-11 02:16 AM

Thank you, Jan.

Sorry for that. I was just testing a different flags this is like it should be:

> #define SPI1_TX_DMA_FLAG_TCIF DMA_FLAG_TCIF3

> #define SPI1_RX_DMA_FLAG_TCIF DMA_FLAG_TCIF2

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Go to solution
JPeña.1
Associate II

‎2021-03-11 03:44 AM

Problem solved by itself.

After commenting and uncommenting a few lines, the reception started working so my guess is that it was a problem from the IDE.

The code posted above works in case someone needs an example.

Thanks.

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