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trasfert data from DCMI to SRAM using DMA

Question asked by sak hos on May 6, 2017

Hello,

i'm using STM32F4Discovery with the OV7670 camera , i'm trying to get a QVGA picture (320*240) RGB (each pixel is coded in one byte) and then i'll try to send thses picture to a server using SIM900, the probleme is that when i set a breakpoint at the DMA2_ IRQhandler the breakpoint is never reached although the register TCIF1 is set , and that mean that trasfert is done.
i attached my code for more details
is there somone who could help me

thank you

 

############################################################################################

void DCMI_Configure(uint32_t *frame)
{


DCMI_InitTypeDef DCMI_InitStructure;
GPIO_InitTypeDef GPIO_InitStructure;
DMA_InitTypeDef DMA_InitStructure;
DMA_InitTypeDef DMA_InitStructureusart;
NVIC_InitTypeDef NVIC_InitStructure;
NVIC_InitTypeDef NVIC_InitStructureDcmiToDma;


/* Enable DCMI GPIOs clocks */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA | RCC_AHB1Periph_GPIOB | RCC_AHB1Periph_GPIOC | RCC_AHB1Periph_GPIOE, ENABLE);

/* Enable DCMI clock */
RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_DCMI, ENABLE);

/* Connect DCMI pins to AF13 ************************************************/
GPIO_PinAFConfig(GPIOA, GPIO_PinSource4, GPIO_AF_DCMI);//HSYNC
GPIO_PinAFConfig(GPIOA, GPIO_PinSource6, GPIO_AF_DCMI);//PCLK
GPIO_PinAFConfig(GPIOB, GPIO_PinSource7, GPIO_AF_DCMI);//VSYNC

//RED
GPIO_PinAFConfig(GPIOC, GPIO_PinSource6, GPIO_AF_DCMI);//D0
GPIO_PinAFConfig(GPIOA, GPIO_PinSource10, GPIO_AF_DCMI);//D1

GPIO_PinAFConfig(GPIOC, GPIO_PinSource8, GPIO_AF_DCMI);//D2

//Blue
GPIO_PinAFConfig(GPIOC, GPIO_PinSource9, GPIO_AF_DCMI);//D3
GPIO_PinAFConfig(GPIOE, GPIO_PinSource4, GPIO_AF_DCMI); //D4

GPIO_PinAFConfig(GPIOB, GPIO_PinSource6, GPIO_AF_DCMI); //D5

GPIO_PinAFConfig(GPIOE, GPIO_PinSource5, GPIO_AF_DCMI);//D6
GPIO_PinAFConfig(GPIOE, GPIO_PinSource6, GPIO_AF_DCMI);//D7



/* DCMI GPIO configuration **************************************************/


/*
D0 -- PC6
D1 -- PA10
D2 -- PC8
D3 -- PC9
D4 -- PE4
D5 -- PB6
D6 -- PE5
D7 -- PE6

PCK - PA6
HS -- PA4
VS -- PB7
*/

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4 | GPIO_Pin_10 ;
GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;
GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;
GPIO_InitStructure.GPIO_OType = GPIO_OType_OD;
GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP ;
GPIO_Init(GPIOA, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_7;
GPIO_Init(GPIOB, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6 | GPIO_Pin_8 | GPIO_Pin_9;
GPIO_Init(GPIOC, &GPIO_InitStructure);

GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5 | GPIO_Pin_6 | GPIO_Pin_4;
GPIO_Init(GPIOE, &GPIO_InitStructure);

/* PCLK(PA6) */
GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6;
GPIO_Init(GPIOA, &GPIO_InitStructure);


/* DCMI configuration *******************************************************/
DCMI_InitStructure.DCMI_CaptureMode = DCMI_CaptureMode_SnapShot;//DCMI_CaptureMode_Continuous;//DCMI_CaptureMode_SnapShot;
DCMI_InitStructure.DCMI_SynchroMode = DCMI_SynchroMode_Hardware;
DCMI_InitStructure.DCMI_PCKPolarity = DCMI_PCKPolarity_Falling;
DCMI_InitStructure.DCMI_VSPolarity = DCMI_VSPolarity_High;
DCMI_InitStructure.DCMI_HSPolarity = DCMI_HSPolarity_High;
DCMI_InitStructure.DCMI_CaptureRate = DCMI_CaptureRate_1of4_Frame; //DCMI_CaptureRate_All_Frame;
DCMI_InitStructure.DCMI_ExtendedDataMode = DCMI_ExtendedDataMode_8b;

DCMI_Init(&DCMI_InitStructure);

/* DCMI Interrupts config ***************************************************/
DCMI_ITConfig(DCMI_IT_VSYNC, ENABLE);
DCMI_ITConfig(DCMI_IT_LINE, ENABLE);
DCMI_ITConfig(DCMI_IT_FRAME, ENABLE);
DCMI_ITConfig(DCMI_IT_ERR, ENABLE);

/* Configures the DMA2 to transfer Data from DCMI to Memory ****************/
/* Enable DMA2 clock */
RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2, ENABLE);

/* DMA2 Stream1 Configuration */
DMA_DeInit(DMA2_Stream1);

DMA_InitStructure.DMA_Channel = DMA_Channel_1;
DMA_InitStructure.DMA_PeripheralBaseAddr =(uint32_t)(DCMI_BASE + 0x28);//(DCMI_BASE + 0x28);//DCMI->DR; //DCMI_DR_ADDRESS;//(uint32_t)(&DCMI->DR);
DMA_InitStructure.DMA_Memory0BaseAddr = (uint32_t)frame;
DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
DMA_InitStructure.DMA_BufferSize = 19200;//25344*3;//320*240*2;//0xfffe; //= Image size /4 //0xfffe;
DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;//DMA_MemoryInc_Disable;
DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;
DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;// First take one picture//DMA_Mode_Circular;
DMA_InitStructure.DMA_Priority = DMA_Priority_High;
DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Enable;
DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;
DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;
DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;

DMA_Init(DMA2_Stream1, &DMA_InitStructure);

DMA_ITConfig(DMA2_Stream1,DMA_IT_TC,ENABLE);

NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructureDcmiToDma.NVIC_IRQChannel = DMA2_Stream1_IRQn;
NVIC_InitStructureDcmiToDma.NVIC_IRQChannelPreemptionPriority = 2;//1
NVIC_InitStructureDcmiToDma.NVIC_IRQChannelSubPriority = 2;//1
NVIC_InitStructureDcmiToDma.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
//NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);
NVIC_InitStructure.NVIC_IRQChannel = DCMI_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelSubPriority = 2;
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
NVIC_Init(&NVIC_InitStructure);
}

#########################################################################################"

void DMA2_Stream1_IRQHandler(void)
{

//Test on DMA2 Channel1 Transfer Complete interrupt
if(DMA_GetITStatus(DMA2_Stream1,DMA_IT_TCIF1) == SET)
{
// USART_SendData(USART2, DMA2->);

DMA_ClearITPendingBit(DMA2_Stream1,DMA_IT_TCIF1);
}
if(DMA_GetITStatus(DMA2_Stream1,DMA_IT_TEIF1) == SET)
{
//USART_SendData(USART2, buff[0]);//TM_USB_VCP_Send(&buff[0], 255);
DMA_ClearITPendingBit(DMA2_Stream1,DMA_IT_TEIF1);
}
}

Outcomes