关于f4 用DCMI采集鹰眼ov7725的讨论

牛仔裤上的洞 · 发表于 2017-9-11 20:34:48

大佬们本人想用f4 探索者的DCMI采集鹰眼的图像但图像一直被分为4*8 =32 块一模一样显示在lcd上中断也没执行其他内容有遇到过这种情况的吗

牛仔裤上的洞 · 发表于 2017-9-11 20:35:36

void DCMI_DMA_Init(u32 DMA_Memory0BaseAddr,u16 DMA_BufferSize,u32 DMA_MemoryDataSize,u32 DMA_MemoryInc)
{
DMA_InitTypeDef  DMA_InitStructure;
// DCMI_CROPInitTypeDef DCMI_CROPInitStruct;
NVIC_InitTypeDef NVIC_InitStructure;

  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2,ENABLE);//DMA2ê±Öóê1Äü
DMA_DeInit(DMA2_Stream1);
while (DMA_GetCmdStatus(DMA2_Stream1) != DISABLE){}//μè′yDMA2_Stream1¿éÅäÖÃ

  /* ÅäÖÃ DMA Stream */
  DMA_InitStructure.DMA_Channel = DMA_Channel_1;  //í¨μà1 DCMIí¨μà
  DMA_InitStructure.DMA_PeripheralBaseAddr = (u32)&DCMI->DR;//íaéèμØÖ·Îa

CMI->DR
  DMA_InitStructure.DMA_Memory0BaseAddr = DMA_Memory0BaseAddr;//DMA ′æ′￠Æ÷0μØÖ·
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;//íaéèμ½′æ′￠Æ÷Ä￡ê½
  DMA_InitStructure.DMA_BufferSize = DMA_BufferSize;//êy¾Y′«êäá¿
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;//íaéè·ÇÔöá¿Ä￡ê½
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc;//′æ′￠Æ÷Ôöá¿Ä￡ê½
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;//íaéèêy¾Y3¤¶è:32Î»
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize;//′æ′￠Æ÷êy¾Y3¤¶è
  DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;// ê1óÃÑ-»·Ä￡ê½
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;//¸ßóÅÏè¼¶
  DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Enable; //FIFOÄ￡ê½
  DMA_InitStructure.DMA_FIFOThreshold = DMA_FIFOThreshold_Full;//ê1óÃè«FIFO
  DMA_InitStructure.DMA_MemoryBurst = DMA_MemoryBurst_Single;//íaéèí»·￠μ￥′Î′«êä
  DMA_InitStructure.DMA_PeripheralBurst = DMA_PeripheralBurst_Single;//′æ′￠Æ÷í»·￠μ￥′Î′«êä
  DMA_Init(DMA2_Stream1, &DMA_InitStructure);//3õê¼»ˉDMA Stream

//    DCMI_CROPInitStruct.DCMI_CaptureCount=639;                      //capcnt
// DCMI_CROPInitStruct.DCMI_HorizontalOffsetCount=0;          //hoffcnt
// DCMI_CROPInitStruct.DCMI_VerticalLineCount=119;                //vline
// DCMI_CROPInitStruct.DCMI_VerticalStartLine=0;                //vst
// DCMI_CROPConfig(&DCMI_CROPInitStruct);
//    DCMI_CROPCmd(ENABLE);

DMA_ITConfig(DMA2_Stream1,DMA_IT_TC,ENABLE);
NVIC_InitStructure.NVIC_IRQChannel= DMA2_Stream1_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=0;
NVIC_InitStructure.NVIC_IRQChannelSubPriority=0;
NVIC_InitStructure.NVIC_IRQChannelCmd=ENABLE;
NVIC_Init(&NVIC_InitStructure); //¸ù¾YÖ¸¶¨μÄ2Îêy3õê¼»ˉVIC¼Ä′æÆ÷¡￠

}

void DMA2_Stream1_IRQHandler(void)
{
if(DMA_GetFlagStatus(DMA2_Stream1,DMA_FLAG_TCIF1)==SET)//DMA2_Steam1,′«êäíê3é±êÖ¾
{
   DMA_ClearFlag(DMA2_Stream1,DMA_FLAG_TCIF1);//Çå3y′«êäíê3éÖD¶Ï
datanum++;
}
}
//DCMI3õê¼»ˉ
void My_DCMI_Init(void)
{
  GPIO_InitTypeDef  GPIO_InitStructure;
NVIC_InitTypeDef NVIC_InitStructure;

  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA|RCC_AHB1Periph_GPIOB|RCC_AHB1Periph_GPIOC|RCC_AHB1Periph_GPIOE, ENABLE);//ê1ÄüGPIOA B C E ê±Öó
RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_DCMI,ENABLE);//ê1ÄüDCMIê±Öó
  //PA4/63õê¼»ˉéèÖÃ
  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_4|GPIO_Pin_6;//PA4/6 ¸′óÃ1|Äüêä3ö
  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF; //¸′óÃ1|Äüêä3ö
  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;//íÆíìêä3ö
  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;//100MHz
  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;//éÏà-
  GPIO_Init(GPIOA, &GPIO_InitStructure);//3õê¼»ˉ

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_7|GPIO_Pin_6;// PB6/7 ¸′óÃ1|Äüêä3ö
  GPIO_Init(GPIOB, &GPIO_InitStructure);//3õê¼»ˉ

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_6|GPIO_Pin_7|GPIO_Pin_8|GPIO_Pin_9|GPIO_Pin_11;//PC6/7/8/9/11 ¸′óÃ1|Äüêä3ö
  GPIO_Init(GPIOC, &GPIO_InitStructure);//3õê¼»ˉ

  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_5|GPIO_Pin_6;//PE5/6  ¸′óÃ1|Äüêä3ö
  GPIO_Init(GPIOE, &GPIO_InitStructure);//3õê¼»ˉ

GPIO_PinAFConfig(GPIOA,GPIO_PinSource4,GPIO_AF_DCMI); //PA4,AF13  DCMI_HSYNC
GPIO_PinAFConfig(GPIOA,GPIO_PinSource6,GPIO_AF_DCMI); //PA6,AF13  DCMI_PCLK
GPIO_PinAFConfig(GPIOB,GPIO_PinSource7,GPIO_AF_DCMI); //PB7,AF13  DCMI_VSYNC
GPIO_PinAFConfig(GPIOC,GPIO_PinSource6,GPIO_AF_DCMI); //PC6,AF13  DCMI_D0
GPIO_PinAFConfig(GPIOC,GPIO_PinSource7,GPIO_AF_DCMI); //PC7,AF13  DCMI_D1
GPIO_PinAFConfig(GPIOC,GPIO_PinSource8,GPIO_AF_DCMI); //PC8,AF13  DCMI_D2
GPIO_PinAFConfig(GPIOC,GPIO_PinSource9,GPIO_AF_DCMI); //PC9,AF13  DCMI_D3
GPIO_PinAFConfig(GPIOC,GPIO_PinSource11,GPIO_AF_DCMI);//PC11,AF13 DCMI_D4
GPIO_PinAFConfig(GPIOB,GPIO_PinSource6,GPIO_AF_DCMI); //PB6,AF13  DCMI_D5
GPIO_PinAFConfig(GPIOE,GPIO_PinSource5,GPIO_AF_DCMI); //PE5,AF13  DCMI_D6
GPIO_PinAFConfig(GPIOE,GPIO_PinSource6,GPIO_AF_DCMI); //PE6,AF13  DCMI_D7

DCMI_DeInit();//Çå3yÔ-à′μÄéèÖÃ

  DCMI_InitStructure.DCMI_CaptureMode=DCMI_CaptureMode_Continuous;//á¬DøÄ￡ê½
  DCMI_InitStructure.DCMI_CaptureRate=DCMI_CaptureRate_All_Frame;//è«Ö¡2¶»ñ
//DCMI_InitStructure.DCMI_CaptureRate=DCMI_CaptureRate_1of2_Frame;
DCMI_InitStructure.DCMI_ExtendedDataMode= DCMI_ExtendedDataMode_8b;//8Î»êy¾Y¸ñê½
DCMI_InitStructure.DCMI_HSPolarity = DCMI_HSPolarity_Low;//HSYNC μíμçÆ½óDD§
DCMI_InitStructure.DCMI_PCKPolarity= DCMI_PCKPolarity_Rising;//PCLK éÏéyÑØóDD§
DCMI_InitStructure.DCMI_SynchroMode= DCMI_SynchroMode_Hardware;//ó2¼tí¬2½HSYNC,VSYNC
DCMI_InitStructure.DCMI_VSPolarity=DCMI_VSPolarity_High;//VSYNC μíμçÆ½óDD§
DCMI_Init(&DCMI_InitStructure);

DCMI_ITConfig(DCMI_IT_FRAME,ENABLE);//¿aÆôÖ¡ÖD¶Ï
DCMI_ITConfig(DCMI_IT_LINE,ENABLE); //¿aÆôDDÖD¶Ï
DCMI_ITConfig(DCMI_IT_VSYNC,ENABLE); //¿aÆô3¡ÖD¶Ï
DCMI_Cmd(ENABLE); //DCMIê1Äü

  NVIC_InitStructure.NVIC_IRQChannel = DCMI_IRQn;
NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority=1;//ÇàÕ¼óÅÏè¼¶1
NVIC_InitStructure.NVIC_IRQChannelSubPriority =0; //×óóÅÏè¼¶3
NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE; //IRQí¨μàê1Äü
NVIC_Init(&NVIC_InitStructure); //¸ù¾YÖ¸¶¨μÄ2Îêy3õê¼»ˉVIC¼Ä′æÆ÷¡￠
}