BiPOM Help > STM Development System > Examples > Examples > SPI2 test
SPI2 test

SPI2 test based on DMA transfers/interrupts Connect MOSI to MISO pin.
Location:/bipom/devtools/STM32/examples/spi2dma
Code Example

SPI_InitTypeDef  SPI_InitStructure;
DMA_InitTypeDef  DMARX_InitStructure;
DMA_InitTypeDef  DMATX_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;


UBYTE SPI2_MASTER_Buffer_Tx[BufferSize] = {0x01, 0x02, 0x03, 0x04, 0x05, 0x06,
                                            0x07, 0x08, 0x09, 0x0A, 0x0B, 0x0C,
                                            0x0D, 0x0E, 0x0F, 0x10, 0x11, 0x12,
                                            0x13, 0x14, 0x15, 0x16, 0x17, 0x18,
                                            0x19, 0x1A, 0x1B, 0x1C, 0x1D, 0x1E,
                                            0x1F, 0x20};


UBYTE SPI2_MASTER_Buffer_Rx[BufferSize]={0};
volatile TestStatus TransferStatus = FAILED;
volatile int CurrDataCounterEnd = 1;


//********************************************************************************

int main (void)
{
	delayMs(250);
	
	UINT testNum =1;	
	ERRCODE ec=SUCCESS;
	tprintf("\n\rMini-Max/STM32F1");
	tprintf("\n\rSPI2/DMA TEST REV 1.01");
	//

	ec = Spi2Dma_Test();
	tprintf("\r\nTEST 0 ");
	if(SUCCESS == ec)	tprintf("PASSED");
	else				tprintf("FAILED");
	for(;;)
	{
		delayMs(500);
		ec = Spi2Dma_NextTest();
		tprintf("\r\nTEST %u ",testNum++);
		if(SUCCESS == ec)	tprintf("PASSED");
		else				tprintf("FAILED");
	}
	return 0;
}

//********************************************************************************

ERRCODE Spi2Dma_Test(void)
{
	ERRCODE ec = SUCCESS;
	/* Configure DMA interrupts */
	NVIC_Configuration();
	/* Configure clocks */
	RCC_AHBPeriphClockCmd(SPI2_MASTER_DMA_CLK, ENABLE);
	RCC_APB2PeriphClockCmd(SPI2_MASTER_GPIO_CLK, ENABLE);
	RCC_APB1PeriphClockCmd(SPI2_MASTER_CLK, ENABLE);
	/* Configure SPI_MASTER pins: MISO, SCK and MOSI */
  	GPIO_InitStructure.GPIO_Pin = SPI2_MASTER_PIN_MISO | SPI2_MASTER_PIN_SCK | SPI2_MASTER_PIN_MOSI;
	GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;
	GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF_PP;
	GPIO_Init(SPI2_MASTER_GPIO, &GPIO_InitStructure);
	/* Configure RX DMA */
	DMA_DeInit(SPI2_MASTER_Rx_DMA_Channel);
	DMARX_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SPI2_MASTER_DR_Base;
	DMARX_InitStructure.DMA_MemoryBaseAddr = (uint32_t)SPI2_MASTER_Buffer_Rx;
	DMARX_InitStructure.DMA_DIR = DMA_DIR_PeripheralSRC;
	DMARX_InitStructure.DMA_BufferSize = BufferSize;
	DMARX_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
	DMARX_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
	DMARX_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
	DMARX_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
	DMARX_InitStructure.DMA_Mode = DMA_Mode_Normal;
	DMARX_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
	DMARX_InitStructure.DMA_M2M = DMA_M2M_Disable;
	DMA_Init(SPI2_MASTER_Rx_DMA_Channel, &DMARX_InitStructure);
	/* Configure TX DMA */
	DMA_DeInit(SPI2_MASTER_Tx_DMA_Channel);
	DMATX_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)SPI2_MASTER_DR_Base;
	DMATX_InitStructure.DMA_MemoryBaseAddr = (uint32_t)SPI2_MASTER_Buffer_Tx;
	DMATX_InitStructure.DMA_DIR = DMA_DIR_PeripheralDST;
	DMATX_InitStructure.DMA_BufferSize = BufferSize;
	DMATX_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
	DMATX_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;
	DMATX_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Byte;
	DMATX_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Byte;
	DMATX_InitStructure.DMA_Mode = DMA_Mode_Normal;
	DMATX_InitStructure.DMA_Priority = DMA_Priority_VeryHigh;
	DMATX_InitStructure.DMA_M2M = DMA_M2M_Disable;
	DMA_Init(SPI2_MASTER_Tx_DMA_Channel, &DMATX_InitStructure);
	/* Configure SPI MASTER */
	SPI_InitStructure.SPI_Direction = SPI_Direction_2Lines_FullDuplex;
	SPI_InitStructure.SPI_Mode = SPI_Mode_Master;
	SPI_InitStructure.SPI_DataSize = SPI_DataSize_8b;
	SPI_InitStructure.SPI_CPOL = SPI_CPOL_High;
	SPI_InitStructure.SPI_CPHA = SPI_CPHA_1Edge;
	SPI_InitStructure.SPI_NSS = SPI_NSS_Hard;
	SPI_InitStructure.SPI_BaudRatePrescaler = SPI_BaudRatePrescaler_32;
	SPI_InitStructure.SPI_FirstBit = SPI_FirstBit_MSB;
	SPI_InitStructure.SPI_CRCPolynomial = 7;
	SPI_Init(SPI2_MASTER, &SPI_InitStructure);
	/* Enable SPI2_MASTER Rx request */
	SPI_I2S_DMACmd(SPI2_MASTER, SPI_I2S_DMAReq_Rx, ENABLE);
	/* Enable SPI2_MASTER Tx request */
	SPI_I2S_DMACmd(SPI2_MASTER, SPI_I2S_DMAReq_Tx, ENABLE);
	/* Enable DMA1 Channel4 Transfer Complete interrupt */
  	DMA_ITConfig(DMA1_Channel4, DMA_IT_TC, ENABLE);
	/* Enable SPI_MASTER */
	SPI_Cmd(SPI2_MASTER, ENABLE);
	/* Enable DMA1 Channel4 */
	DMA_Cmd(SPI2_MASTER_Rx_DMA_Channel, ENABLE);
	/* Enable DMA1 Channel5 */
	DMA_Cmd(SPI2_MASTER_Tx_DMA_Channel, ENABLE);
	/* Wait the end of transmission */
  	while (CurrDataCounterEnd != 0){}
  	/* Check the correctness of written data */
	TransferStatus = Buffercmp(SPI2_MASTER_Buffer_Rx, SPI2_MASTER_Buffer_Tx, BufferSize);
	/* TransferStatus = PASSED, if the transmitted and received data  are equal */
	/* TransferStatus = FAILED, if the transmitted and received data  are different */
	//

 	if (PASSED==TransferStatus) ec = SUCCESS;
 	else						ec = ERROR;
 return ec;
}

//********************************************************************************

TestStatus Buffercmp(UBYTE* pBuffer1, UBYTE* pBuffer2, uint16_t BufferLength)
{
  while (BufferLength--)
  {
    if (*pBuffer1 != *pBuffer2)
    {
      return FAILED;
    }
    pBuffer1++;
    pBuffer2++;
  }

  return PASSED;
}

//********************************************************************************

void NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;
  
  /* Enable DMA1 channel4 IRQ Channel */
  NVIC_InitStructure.NVIC_IRQChannel = DMA1_Channel4_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}

//********************************************************************************

void DMA1_Channel4_IRQHandler(void)
{
	/* Test on DMA1 Channel4 Transfer Complete interrupt */
	if(DMA_GetITStatus(DMA1_IT_TC4))
	{
		/* Get Current Data Counter value after complete transfer */
		CurrDataCounterEnd = DMA_GetCurrDataCounter(DMA1_Channel4);
		/* Clear DMA1 Channel4 Half Transfer, Transfer Complete and Global interrupt pending bits */
		DMA_ClearITPendingBit(DMA1_IT_GL4);
  }
}

//********************************************************************************

ERRCODE Spi2Dma_NextTest(void)
{
	ERRCODE ec = SUCCESS;
	int i;
	// Clear Rx buffer

	for(i=0; i<BufferSize; i++) SPI2_MASTER_Buffer_Rx[i]=0;
	/* */
	CurrDataCounterEnd = 1;
	/* Configure RX DMA */
	DMA_DeInit(SPI2_MASTER_Rx_DMA_Channel);
	DMA_Init(SPI2_MASTER_Rx_DMA_Channel, &DMARX_InitStructure);
	/* Configure TX DMA */
	DMA_DeInit(SPI2_MASTER_Tx_DMA_Channel);
	DMA_Init(SPI2_MASTER_Tx_DMA_Channel, &DMATX_InitStructure);
	//

	/* Enable SPI2_MASTER Rx request */
	SPI_I2S_DMACmd(SPI2_MASTER, SPI_I2S_DMAReq_Rx, ENABLE);
	/* Enable SPI2_MASTER Tx request */
	SPI_I2S_DMACmd(SPI2_MASTER, SPI_I2S_DMAReq_Tx, ENABLE);
	/* Enable DMA1 Channel4 Transfer Complete interrupt */
  	DMA_ITConfig(DMA1_Channel4, DMA_IT_TC, ENABLE);
	//

	/* Enable DMA1 Channel4 */
	DMA_Cmd(SPI2_MASTER_Rx_DMA_Channel, ENABLE);
	/* Enable DMA1 Channel5 */
	DMA_Cmd(SPI2_MASTER_Tx_DMA_Channel, ENABLE);
	/* Wait the end of transmission */
  	while (CurrDataCounterEnd != 0){}
  	/* Check the correctness of written data */
	TransferStatus = Buffercmp(SPI2_MASTER_Buffer_Rx, SPI2_MASTER_Buffer_Tx, BufferSize);
	/* TransferStatus = PASSED, if the transmitted and received data  are equal */
	/* TransferStatus = FAILED, if the transmitted and received data  are different */
	//

 	if (PASSED==TransferStatus) ec = SUCCESS;
 	else						ec = ERROR;
 return ec;
}
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