STM32F105 SPI3 over DMA causes HardFault

[stst9184]

Posted on March 12, 2012 at 15:21

I have a following code to initial SPI3 communication. The code below causes a HardFault and I am still not able to find the reason:(

void spi_init(void)

{

DMA_InitTypeDef DMA_InitStructure;

SPI_InitTypeDef SPI_InitStructure;

NVIC_InitTypeDef NVIC_InitStructure;


while(gFlag != 1);

gFlag = 0;


RCC_APB2PeriphClockCmd(RCC_APB2Periph_AFIO|RCC_APB2Periph_GPIOA|RCC_APB2Periph_GPIOC, ENABLE);

RCC_APB2PeriphClockCmd(RCC_APB1Periph_SPI3, ENABLE);

RCC_AHBPeriphClockCmd(RCC_AHBPeriph_DMA2, ENABLE);


NVIC_InitStructure.NVIC_IRQChannel = DMA2_Channel2_IRQn;

NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;

NVIC_InitStructure.NVIC_IRQChannelSubPriority = 3;

NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;


NVIC_Init(&NVIC_InitStructure);


GPIO_PinRemapConfig(GPIO_Remap_SPI3, ENABLE); 


vGPIO_Set2(&gSpiCfg.OutPin);

vGPIO_Set2(&gSpiCfg.InpPin);

vGPIO_Set2(&gSpiCfg.ClkPin);

vGPIO_Set2(&gSpiCfg.ChsPin);


RCC_APB1PeriphClockCmd(RCC_APB1Periph_SPI3, ENABLE);


/* SPI3 configuration */

SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;

SPI_InitStructure.SPI_Mode = SPI_Mode_Master;

SPI_InitStructure.SPI_DataSize = SPI_DataSize_16b;

SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;

SPI_InitStructure.SPI_CPHA = SPI_CPHA_2Edge;

SPI_InitStructure.SPI_NSS = SPI_NSS_Soft;

SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_2;

SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;

SPI_InitStructure.SPI_CRCPolynomial = 7;


SPI_Init(SPI3, &SPI_InitStructure); 


DMA_DeInit(DMA2_Channel2);


DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&(SPI3->DR);

DMA_InitStructure.DMA_MemoryBaseAddr = (u32)dma;

DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;

DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;

DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;

DMA_InitStructure.DMA_BufferSize = SPI_DEV1_DATA_SIZE;

DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;

DMA_InitStructure.DMA_MemoryDataSize = DMA_PeripheralDataSize_Byte;

DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;

DMA_InitStructure.DMA_Priority = DMA_Priority_High;

DMA_InitStructure.DMA_M2M = DMA_M2M_Disable; 

DMA_Init(DMA2_Channel2, &DMA_InitStructure);

DMA_ITConfig(DMA2_Channel2, DMA_IT_TC | DMA_IT_TE, ENABLE);

DMA_Cmd(DMA2_Channel2, ENABLE);


SPI_I2S_DMACmd(SPI3, SPI_I2S_DMAReq_Tx, ENABLE);

SPI_Cmd(SPI3, ENABLE); 


/* while (DMA_GetFlagStatus(DMA2_FLAG_TC2) == RESET) { ; } */

}


void main(void)

{

NVIC_SetVectorTable(NVIC_VectTab_FLASH, 

APPLICATION_SP_ADDRESS-FLASH_START_ADDRESS);


/* Configure one bit for preemption priority */

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);


/* Initialize microcontroller clocks and busses */

SystemInit();


while (1) 

{

spi_init();

}

}


/* in stm3210x_it.c */

...

void DMA2_Channel2_IRQHandler(void)

{ 

DMA_ClearFlag(DMA2_FLAG_TC2);

//assert_param(mSPIDevice[0].Cfg->fncSoftChipDeselect);

//mSPIDevice[0].Cfg->fncSoftChipDeselect();

gFlag = 1; 

}

...

Can somebody tell me what can be a reason. I've tried to disable DMA interrupt and check it with a while loop (line 63) it works fine. So I assume it is something with interrupt part, but I can't find wthat is it. Thank you for any hint #stm32-spi-dma

[stst9184]

Posted on March 13, 2012 at 18:37

Hi clive1,

I have still one problem. Please could you look on my item ''?