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STM32F429 Communication with STM32F401 use SPI, the slave data shift.

WBowe
Associate II

‎2019-10-17 1:04 AM

board: STM32F429I-DISC1

NUCLEO-F401RE

I use SPI with DMA , but the MOSI will shift randomly.

​

Connection of two boards.

0690X00000AqTH0QAN.png

Master(STM32F429)

void init_SPI1(void)
{
	GPIO_InitTypeDef GPIO_InitStruct;
	SPI_InitTypeDef SPI_InitStruct;
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
	GPIO_InitStruct.GPIO_Pin = GPIO_Pin_5| GPIO_Pin_6 | GPIO_Pin_7;
	GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
	GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
	GPIO_InitStruct.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
	GPIO_Init(GPIOA, &GPIO_InitStruct);
	GPIO_InitStruct.GPIO_Pin = GPIO_Pin_9 ;//Select Chip
	GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT;
	GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
	GPIO_InitStruct.GPIO_Speed = GPIO_Speed_100MHz;
	GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
	GPIO_Init(GPIOD, &GPIO_InitStruct);
	GPIO_InitStruct.GPIO_Pin =  GPIO_Pin_4 ;//Select Chip
	GPIO_InitStruct.GPIO_Mode = GPIO_Mode_OUT;
	GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
	GPIO_InitStruct.GPIO_Speed = GPIO_Speed_100MHz;
	GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_UP;
	GPIO_Init(GPIOA, &GPIO_InitStruct);
	GPIO_SetBits(GPIOA, GPIO_Pin_4);//For stm32f429 discovery board
	GPIO_SetBits(GPIOD, GPIO_Pin_9);//For stm32f401 manual board
	GPIO_PinAFConfig(GPIOA, GPIO_PinSource5, GPIO_AF_SPI1);
	GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_SPI1);
	GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_SPI1);
	SPI_I2S_DeInit(SPI1);
	SPI_InitStruct.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
	SPI_InitStruct.SPI_Mode = SPI_Mode_Master;
	SPI_InitStruct.SPI_DataSize = SPI_DataSize_16b;
	SPI_InitStruct.SPI_CPOL = SPI_CPOL_High;
	SPI_InitStruct.SPI_CPHA = SPI_CPHA_1Edge;
	SPI_InitStruct.SPI_NSS = SPI_NSS_Soft|SPI_NSSInternalSoft_Set ;
	SPI_InitStruct.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_8  ;
	SPI_InitStruct.SPI_FirstBit = SPI_FirstBit_MSB;
  SPI_InitStruct.SPI_CRCPolynomial = 7;
	SPI_Init(SPI1, &SPI_InitStruct);
	
	SPI_I2S_ITConfig(SPI1, SPI_I2S_IT_RXNE, ENABLE);	
	NVIC_InitTypeDef NVIC_InitStructure;
	NVIC_InitStructure.NVIC_IRQChannel = SPI1_IRQn; 
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0; 
	NVIC_InitStructure.NVIC_IRQChannelCmd = DISABLE;
	NVIC_Init(&NVIC_InitStructure);
	
  SPI_Cmd(SPI1, ENABLE);
}
 
void Finger_Connect(uint16_t mode)
{
	GPIO_ResetBits(GPIOA, GPIO_Pin_4);
	GPIO_ResetBits(GPIOD, GPIO_Pin_9);
 
		while(SPI_I2S_GetFlagStatus(SPI1,SPI_I2S_FLAG_TXE) == RESET);
		SPI_I2S_SendData(SPI1,mode);
		while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
		SPI_Buffer_Rx[0] = SPI_I2S_ReceiveData(SPI1);
	
	for(int i = 0 ; i <spirecivetime ; i++){
		while(SPI_I2S_GetFlagStatus(SPI1,SPI_I2S_FLAG_TXE) == RESET);
		SPI_I2S_SendData(SPI1,0xAAAA);
		while(SPI_I2S_GetFlagStatus(SPI1, SPI_I2S_FLAG_RXNE) == RESET);
		SPI_Buffer_Rx[i+1] = SPI_I2S_ReceiveData(SPI1);
	}
	GPIO_SetBits(GPIOA, GPIO_Pin_4);
	GPIO_SetBits(GPIOD, GPIO_Pin_9);
}

​Slave(STM32F401)

uint16_t SEND_BUFF[15]={0x5555,0xAAAA,0x1234,0x2345,0x3456,0x4567,0x5678,0x6789,0,0,0,0,0,0,0}, RECEIVE_BUFF[15]={0};
 
void init_SPI1(void)
{
	GPIO_InitTypeDef GPIO_InitStruct;
	SPI_InitTypeDef SPI_InitStruct;
	DMA_InitTypeDef DMA_InitStructure;
	NVIC_InitTypeDef NVIC_InitStructure;	
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);
	RCC_APB2PeriphClockCmd(RCC_APB2Periph_SPI1, ENABLE);
	RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);
	
	GPIO_InitStruct.GPIO_Pin = GPIO_Pin_4| GPIO_Pin_5| GPIO_Pin_6 | GPIO_Pin_7;
	GPIO_InitStruct.GPIO_Mode = GPIO_Mode_AF;
	GPIO_InitStruct.GPIO_OType = GPIO_OType_PP;
	GPIO_InitStruct.GPIO_Speed = GPIO_Speed_100MHz;
	GPIO_InitStruct.GPIO_PuPd = GPIO_PuPd_NOPULL;
	GPIO_Init(GPIOA, &GPIO_InitStruct);
	GPIO_PinAFConfig(GPIOA, GPIO_PinSource4, GPIO_AF_SPI1);
	GPIO_PinAFConfig(GPIOA, GPIO_PinSource5, GPIO_AF_SPI1);
	GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_SPI1);
	GPIO_PinAFConfig(GPIOA, GPIO_PinSource7, GPIO_AF_SPI1);
	SPI_I2S_DeInit(SPI1);
	SPI_InitStruct.SPI_Direction = SPI_Direction_2Lines_FullDuplex; 
	SPI_InitStruct.SPI_Mode = SPI_Mode_Slave;
	SPI_InitStruct.SPI_DataSize = SPI_DataSize_16b;
	SPI_InitStruct.SPI_CPOL = SPI_CPOL_High;
	SPI_InitStruct.SPI_CPHA = SPI_CPHA_1Edge;
	SPI_InitStruct.SPI_NSS = SPI_NSS_Hard ;
	SPI_InitStruct.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;
	SPI_InitStruct.SPI_FirstBit = SPI_FirstBit_MSB;
  SPI_InitStruct.SPI_CRCPolynomial = 7;
	SPI_Init(SPI1, &SPI_InitStruct);
 
	/* SPI_MASTER_Rx_DMA_Channel configuration ---------------------------------*/
	DMA_DeInit(DMA2_Stream2);
	DMA_DeInit(DMA2_Stream5);
 
	DMA_StructInit(&DMA_InitStructure);
	DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)(&(SPI1->DR));
	DMA_InitStructure.DMA_BufferSize = SPI_BUFFERSIZE;
	DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
	DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
	DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_HalfWord;
	DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_HalfWord;
	DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;
	DMA_InitStructure.DMA_Priority = DMA_Priority_High;
	DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
	DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_1QuarterFull ;
	DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single ;
/* SPI_MASTER_Rx_DMA_Channel configuration ---------------------------------*/
	DMA_InitStructure.DMA_Channel = DMA_Channel_3; 
	DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;					
	DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)RECEIVE_BUFF;
	DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
	DMA_Init(DMA2_Stream2, &DMA_InitStructure);
	DMA_Cmd(DMA2_Stream2, DISABLE);
	
	/* SPI_MASTER_Tx_DMA_Channel configuration ---------------------------------*/
	DMA_InitStructure.DMA_Channel = DMA_Channel_3;
	DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
	DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)SEND_BUFF;
	DMA_InitStructure.DMA_DIR = DMA_DIR_MemoryToPeripheral;
	DMA_Init(DMA2_Stream5, &DMA_InitStructure);
	DMA_Cmd(DMA2_Stream5, DISABLE);	
	
	NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream5_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 1;
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
	NVIC_Init(&NVIC_InitStructure);
	
	NVIC_InitStructure.NVIC_IRQChannel = DMA2_Stream2_IRQn;
	NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 1;
	NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
	NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
	NVIC_Init(&NVIC_InitStructure);
	
	DMA_ClearFlag(DMA2_Stream2, DMA_FLAG_TCIF2);
	DMA_ClearFlag(DMA2_Stream5, DMA_FLAG_TCIF5);
	
	DMA_ITConfig(DMA2_Stream2, DMA_IT_TC , ENABLE);
	DMA_ITConfig(DMA2_Stream5, DMA_IT_TC , ENABLE);
	
	DMA_Cmd(DMA2_Stream2, ENABLE);
	DMA_Cmd(DMA2_Stream5, DISABLE);	
	/* Enable SPI_MASTER DMA Tx request */
	SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Tx, ENABLE);
	/* Enable SPI_MASTER DMA Rx request */
	SPI_I2S_DMACmd(SPI1, SPI_I2S_DMAReq_Rx, ENABLE);
	SPI_Cmd(SPI1, ENABLE);
}
void DMA2_Stream5_IRQHandler(void)
{
	if(DMA_GetITStatus(DMA2_Stream5, DMA_IT_TCIF5) == SET)
	{
		DMA_ClearITPendingBit(DMA2_Stream5, DMA_IT_TCIF5);
	}
}
void DMA2_Stream2_IRQHandler(void)
{
	if(DMA_GetITStatus(DMA2_Stream2, DMA_IT_TCIF2) == SET)
	{
		DMA_ClearITPendingBit(DMA2_Stream2, DMA_IT_TCIF2);
		DMA2_Stream5->NDTR = 15;		
		DMA_Cmd(DMA2_Stream5, ENABLE);
	}
}

Random capture by logic analyzer

0690X00000AqTOfQAN.png

0690X00000AqTO6QAN.png0690X00000AqTO7QAN.pngI try the setting in Slave by change the configuration hard chip select and soft chip select, and the situation is the same.

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3 REPLIES 3
waclawek.jan
Guru

‎2019-10-17 2:30 AM

> GPIO_InitStruct.GPIO_Speed = GPIO_Speed_100MHz;

Use lower OSPEEDR setting, shorter interconnection, twist the SCK with a ground wire.

JW

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WBowe
Associate II
In response to waclawek.jan

‎2019-10-20 2:05 AM

I try to twist the SCK with a ground wire, it can success communication in soft chip select.

But when I change the setting the MISO also shift in hard chip select.

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waclawek.jan
Guru

‎2019-10-21 7:10 AM

Use lower OSPEEDR setting

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