Can you help me about getting good picture in the STM32

[muhammet]

Posted on August 27, 2013 at 11:23

I can get this Picture.But I don't know how I can correct this mistake!

My code:

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

  DCMI_InitStructure.DCMI_CaptureMode = DCMI_CaptureMode_Continuous;   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_All_Frame;   DCMI_InitStructure.DCMI_ExtendedDataMode = DCMI_ExtendedDataMode_10b;     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);                 NVIC_PriorityGroupConfig(NVIC_PriorityGroup_1);   NVIC_InitStructure.NVIC_IRQChannel = DCMI_IRQn;   NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 15;   NVIC_InitStructure.NVIC_IRQChannelSubPriority = 15;   NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;    NVIC_Init(&NVIC_InitStructure);

  /* Configures the DMA2 to transfer Data from DCMI to the LCD ****************/

  /* 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 = DCMI_DR_ADDRESS;    DMA_InitStructure.DMA_PeripheralBaseAddr = (uint32_t)(DCMI_BASE + 0x28);   DMA_InitStructure.DMA_Memory0BaseAddr =(uint32_t)&buffer_A ;   DMA_InitStructure.DMA_DIR = DMA_DIR_PeripheralToMemory;   DMA_InitStructure.DMA_BufferSize = 0xffff;   DMA_InitStructure.DMA_PeripheralInc = DMA_PeripheralInc_Disable;   DMA_InitStructure.DMA_MemoryInc = DMA_MemoryInc_Enable;   DMA_InitStructure.DMA_PeripheralDataSize = DMA_PeripheralDataSize_Word;   DMA_InitStructure.DMA_MemoryDataSize = DMA_MemoryDataSize_Word;   DMA_InitStructure.DMA_Mode = DMA_Mode_Normal;   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);   }

/**

  * @brief  Set PA8 Output SYSCLK/2.   * @param  None   * @retval None   */ void MCO1_Init(void) {  GPIO_InitTypeDef GPIO_InitStructure;

 RCC_ClockSecuritySystemCmd(ENABLE);

 /* Enable GPIOs clocks */

 RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);    GPIO_PinAFConfig(GPIOA, GPIO_PinSource8, GPIO_AF_MCO);     /* Configure MCO (PA8) */  GPIO_InitStructure.GPIO_Pin = GPIO_Pin_8;  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_100MHz;  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_AF;  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;   GPIO_Init(GPIOA, &GPIO_InitStructure);

 RCC_MCO1Config(RCC_MCO1Source_PLLCLK, RCC_MCO1Div_3);

}

void DCMI_0V7670_PWDN_Init(void)

{  GPIO_InitTypeDef GPIO_InitStructure;

 /* Enable GPIOs clocks */

 RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOA, ENABLE);     GPIO_InitStructure.GPIO_Pin = GPIO_Pin_2;  GPIO_InitStructure.GPIO_Speed = GPIO_Speed_50MHz;  GPIO_InitStructure.GPIO_Mode = GPIO_Mode_OUT;  GPIO_InitStructure.GPIO_OType = GPIO_OType_PP;  GPIO_InitStructure.GPIO_PuPd = GPIO_PuPd_UP;   GPIO_Init(GPIOB, &GPIO_InitStructure);  /*PWDN*/  GPIO_ResetBits(GPIOA, GPIO_Pin_2);  Delay_ms(10);  GPIO_SetBits(GPIOA, GPIO_Pin_2);  }

/**

  * @brief  Set the VGA size(640*320).   * @param  None   * @retval None   */ uint8_t DCMI_OV7670_Init(void) {  uint8_t i;  SCCB_GPIO_Config();  DCMI_Config();  MCO1_Init();  //DCMI_0V7670_RST_PWDN_Init();        Delay_ms(0xfff);  if(DCMI_SingleRandomWrite(OV7670_COM7, SCCB_REG_RESET)!=0)   return 0xff;  Delay_ms(0xfff);    for(i=0;i<CHANGE_REG_NUM;i++)  {   if(DCMI_SingleRandomWrite(change_reg[i][0],change_reg[i][1])!=0)   {    return 0xff;   }  }  //OV7670_config_window(272,16,320,240);// set 240*320  Delay_ms(0xfff);  return 0;//Init ok }

/**

  * @brief  Read the OV7670 Manufacturer identifier.   * @param  OV7670ID: pointer to the OV7670 Manufacturer identifier.   * @retval None   */ uint8_t DCMI_OV7670_ReadID(OV7670_IDTypeDef* OV7670ID) {  uint8_t temp;  if(DCMI_SingleRandomRead(OV7670_MIDH,&temp)!=0)   return 0xff;  OV7670ID->Manufacturer_ID1 = temp;  if(DCMI_SingleRandomRead(OV7670_MIDL,&temp)!=0)   return 0xff;  OV7670ID->Manufacturer_ID2 = temp;  if(DCMI_SingleRandomRead(OV7670_VER,&temp)!=0)   return 0xff;  OV7670ID->Version = temp;  if(DCMI_SingleRandomRead(OV7670_PID,&temp)!=0)   return 0xff;  OV7670ID->PID = temp;

 return 0;

}

[muhammet]

Posted on August 27, 2013 at 13:14

And main code:

int main(void)

{  // OV7670_IDTypeDef OV7670ID;  RCC_ClocksTypeDef SYS_Clocks;

  /*!< At this stage the microcontroller clock setting is already configured,

       this is done through SystemInit() function which is called from startup        file (startup_stm32f2xx.s) before to branch to application main.        To reconfigure the default setting of SystemInit() function, refer to         system_stm32f2xx.c file   */  if (SysTick_Config(SystemCoreClock / 1000))    {      /* Capture error */      while (1);    }  RCC_GetClocksFreq(&SYS_Clocks);

 USART_Configuration();

 USART_NVIC_Config();

 DCMI_OV7670_Init();

     /* Enable DMA transfer */     DMA_Cmd(DMA2_Stream1, ENABLE);     /* Enable DCMI interface */     DCMI_Cmd(ENABLE);     /* Start Image capture */     DCMI_CaptureCmd(ENABLE);      SendPicture();   while(1); }

void Delay(__IO uint32_t nTime)

{   TimingDelay = nTime;

  while(TimingDelay != 0)

  {} }

void TimingDelay_Decrement(void)

{   if (TimingDelay != 0x00)   {     TimingDelay--;   } }

void SendPicture(void)

{  uint16_t deger;  uint16_t value;  int ji=0;    for(ji=0; ji<=38400; ji++)  {    if(ji%2==0)    {      while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET);      value = buffer_A[ji];      deger = (((value>>4)&0x0f)>0x09) ? (((value>>4)&0x0f)+0x37) : (((value>>4)&0x0f)+0x30);      USART_SendData(USART2, deger);      while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET);      deger = ((value)&0x0f)>0x09 ? ((value)&0x0f)+0x37 : ((value)&0x0f)+0x30;      USART_SendData(USART2, deger);               }    else    {      while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET);      value = buffer_A[ji];      deger = (((value>>4)&0x0f)>0x09) ? (((value>>4)&0x0f)+0x37) : (((value>>4)&0x0f)+0x30);      USART_SendData(USART2, deger);      while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET);      deger = ((value)&0x0f)>0x09 ? ((value)&0x0f)+0x37 : ((value)&0x0f)+0x30;      USART_SendData(USART2, deger);              }  }

[armindavatgaran]

Posted on July 03, 2015 at 15:09

Hello

How do you visualize your image?

[Tesla DeLorean]

Posted on July 03, 2015 at 16:06

Don't most people just create a .BMP or .TIF file, using the documented formats for said, and copy in the video rasters, and then load that into Paint or Photoshop type applications?

This requires you to understand the format and structure of the data involved, and fill in header information so the decoding program can process it correctly. This might also require that you handle the colour space/format of the image, building a palette table, or organize the rasters in a specific way/order. There are many image formats, pick one that most closely matches your source data.