关于OV7670+STM32F4+DCMI 新人发帖

wohejiangyuxian · 发表于 2016-3-27 23:37:56

本帖最后由 wohejiangyuxian 于 2016-3-28 00:02 编辑

最近买了20几块的ov7670,调了两天就是出不来，已经熬了两天夜

，作业都没写，但还是出不来。。。。。。。。。。。
我输出YUV格式，去掉UV分量，结果上位机就是黑屏。。。。。。。。，下面是我的程序，额我是改写的ov2640的代码，数组名就没改
2
u16 jpeg_buf[200][240];

wohejiangyuxian · 发表于 2016-3-27 23:38:32

不知道怎么了，后面的没了。。。。。。。。。。。

wohejiangyuxian · 发表于 2016-3-27 23:39:26

本帖最后由 wohejiangyuxian 于 2016-3-27 23:52 编辑

int main(void)
{

      NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);
      delay_init(168);
      uart_init(115200);
      XCLK_Init();//为摄像头提供时钟
      OV7670_Init();
rgb565_test();
      while(1);}

wohejiangyuxian · 发表于 2016-3-27 23:42:00

本帖最后由 wohejiangyuxian 于 2016-3-28 00:03 编辑

void rgb565_test(void)
{

      My_DCMI_Init();
      DCMI_DMA_Init((u16)&jpeg_buf[0],240,DMA_MemoryDataSize_HalfWord,DMA_MemoryInc_Enable);//将DCMI->DR的内容发给jpeg_buf【0】
      OV7670_Window_Set(176,10,240,200);
      DCMI_Start();
            while(1)
      {
            SendOV7620();  //发图像到上位机
            delay_ms(100);
   }
}

wohejiangyuxian · 发表于 2016-3-27 23:44:52

void SendOV7620(void)
{
    uint32_t i,j;
   uint8_t d;
uart_putchar(USART1,0xFF);
  uart_putchar(USART1,0xFE);
uart_putchar(USART1,0xFF);
uart_putchar(USART1,0xFE);
for(i = 0; i < 200; i++)
{
for(j = 0; j < 240; j++)
{
   d=jpeg_buf[i][j]&0x00ff;
if(d > 0xFD) d = 0xFD;
uart_putchar(USART1,d);
}
uart_putchar(USART1,0xFF);
uart_putchar(USART1,0xFE);
}
//  i=0;
  j=0;
}
这里我去掉UV，不知道对不对

wohejiangyuxian · 发表于 2016-3-27 23:46:19

  DCMI_InitStructure.DCMI_CaptureMode = DCMI_CaptureMode_Continuous;//DCMI_CaptureMode_SnapShot;
  DCMI_InitStructure.DCMI_SynchroMode = DCMI_SynchroMode_Hardware;
  DCMI_InitStructure.DCMI_PCKPolarity = DCMI_PCKPolarity_Rising;
  DCMI_InitStructure.DCMI_VSPolarity = DCMI_VSPolarity_Low;
  DCMI_InitStructure.DCMI_HSPolarity = DCMI_HSPolarity_Low;:

这里不知道怎么配置
  //×￥Ö¡ÆμÂê¸ÄÎa4Ö¡ÖD×￥ò»Ö¡
  DCMI_InitStructure.DCMI_CaptureRate = DCMI_CaptureRate_All_Frame;//DCMI_CaptureRate_1of4_Frame;
  DCMI_InitStructure.DCMI_ExtendedDataMode = DCMI_ExtendedDataMode_8b;

DCMI_Init(&DCMI_InitStructure);
  DCMI_ITConfig(DCMI_IT_LINE,ENABLE);//行中断

wohejiangyuxian · 发表于 2016-3-27 23:48:27

本帖最后由 wohejiangyuxian 于 2016-3-28 00:06 编辑

void DCMI_DMA_Init(u32 DMA_Memory0BaseAddr,u16 DMA_BufferSize,u32 DMA_MemoryDataSize,u32 DMA_MemoryInc)
{
      DMA_InitTypeDef  DMA_InitStructure;

  RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_DMA2,ENABLE);
      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;
  DMA_InitStructure.DMA_Memory0BaseAddr = DMA_Memory0BaseAddr;//这里是(u16)&jpeg_buf[0]·
  DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;
  DMA_InitStructure.DMA_BufferSize = DMA_BufferSize;//大小是240及图像宽度
  DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;
  DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc;
  DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;
  DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize;
  DMA_InitStructure.DMA_Mode = DMA_Mode_Circular;
  DMA_InitStructure.DMA_Priority = DMA_Priority_High;
  DMA_InitStructure.DMA_FIFOMode = DMA_FIFOMode_Disable;
  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);

wohejiangyuxian · 发表于 2016-3-27 23:50:08

void DCMI_IRQHandler(void)
{
if(DCMI_GetITStatus(DCMI_IT_LINE)==SET)//行中断
{

if(a<=200)
{

DCMI_ClearITPendingBit(DCMI_IT_LINE)；

      DMA2_Stream1->CR  &= (uint32_t)~DMA_SxCR_EN;
            DMA2_Stream1->M0AR = (uint16_t)&(jpeg_buf[a++]);    //·改变地址必须先失能DMA
            DMA2_Stream1->CR  |=  DMA_SxCR_EN;    //DMA2_Stream1 enable
            DCMI->CR |=  DCMI_CR_CAPTURE;    //capture enable

}

if(a==200)
{
   delay_ms(20);
a=0;
}
  }

wohejiangyuxian · 发表于 2016-3-27 23:50:49

各位大神帮帮忙啊

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