STM32F4 Standard Peripheral bibliotheek  1.0
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stm32f4xx_dcmi.c File Reference

This file provides firmware functions to manage the following functionalities of the DCMI peripheral: More...

#include "stm32f4xx_dcmi.h"
#include "stm32f4xx_rcc.h"


void DCMI_DeInit (void)
 Deinitializes the DCMI registers to their default reset values. More...
void DCMI_Init (DCMI_InitTypeDef *DCMI_InitStruct)
 Initializes the DCMI according to the specified parameters in the DCMI_InitStruct. More...
void DCMI_StructInit (DCMI_InitTypeDef *DCMI_InitStruct)
 Fills each DCMI_InitStruct member with its default value. More...
void DCMI_CROPConfig (DCMI_CROPInitTypeDef *DCMI_CROPInitStruct)
 Initializes the DCMI peripheral CROP mode according to the specified parameters in the DCMI_CROPInitStruct. More...
void DCMI_CROPCmd (FunctionalState NewState)
 Enables or disables the DCMI Crop feature. More...
void DCMI_SetEmbeddedSynchroCodes (DCMI_CodesInitTypeDef *DCMI_CodesInitStruct)
 Sets the embedded synchronization codes. More...
void DCMI_JPEGCmd (FunctionalState NewState)
 Enables or disables the DCMI JPEG format. More...
void DCMI_Cmd (FunctionalState NewState)
 Enables or disables the DCMI interface. More...
void DCMI_CaptureCmd (FunctionalState NewState)
 Enables or disables the DCMI Capture. More...
uint32_t DCMI_ReadData (void)
 Reads the data stored in the DR register. More...
void DCMI_ITConfig (uint16_t DCMI_IT, FunctionalState NewState)
 Enables or disables the DCMI interface interrupts. More...
FlagStatus DCMI_GetFlagStatus (uint16_t DCMI_FLAG)
 Checks whether the DCMI interface flag is set or not. More...
void DCMI_ClearFlag (uint16_t DCMI_FLAG)
 Clears the DCMI's pending flags. More...
ITStatus DCMI_GetITStatus (uint16_t DCMI_IT)
 Checks whether the DCMI interrupt has occurred or not. More...
void DCMI_ClearITPendingBit (uint16_t DCMI_IT)
 Clears the DCMI's interrupt pending bits. More...

Detailed Description

This file provides firmware functions to manage the following functionalities of the DCMI peripheral:

MCD Application Team
  • Initialization and Configuration
  • Image capture functions
  • Interrupts and flags management
*          ===================================================================
*                                 How to use this driver
*          ===================================================================  
*         The sequence below describes how to use this driver to capture image
*         from a camera module connected to the DCMI Interface.
*         This sequence does not take into account the configuration of the  
*         camera module, which should be made before to configure and enable
*         the DCMI to capture images.
*          1. Enable the clock for the DCMI and associated GPIOs using the following functions:
*                 RCC_AHB2PeriphClockCmd(RCC_AHB2Periph_DCMI, ENABLE);
*                 RCC_AHB1PeriphClockCmd(RCC_AHB1Periph_GPIOx, ENABLE);
*          2. DCMI pins configuration 
*             - Connect the involved DCMI pins to AF13 using the following function 
*                 GPIO_PinAFConfig(GPIOx, GPIO_PinSourcex, GPIO_AF_DCMI); 
*             - Configure these DCMI pins in alternate function mode by calling the function
*                 GPIO_Init();
*          3. Declare a DCMI_InitTypeDef structure, for example:
*                 DCMI_InitTypeDef  DCMI_InitStructure;
*             and fill the DCMI_InitStructure variable with the allowed values
*             of the structure member.
*          4. Initialize the DCMI interface by calling the function
*                 DCMI_Init(&DCMI_InitStructure); 
*          5. Configure the DMA2_Stream1 channel1 to transfer Data from DCMI DR
*             register to the destination memory buffer.
*          6. Enable DCMI interface using the function
*                 DCMI_Cmd(ENABLE);
*         7. Start the image capture using the function
*                 DCMI_CaptureCmd(ENABLE);
*         8. At this stage the DCMI interface waits for the first start of frame,
*            then a DMA request is generated continuously/once (depending on the
*            mode used, Continuous/Snapshot) to transfer the received data into
*            the destination memory. 
*  @note  If you need to capture only a rectangular window from the received
*         image, you have to use the DCMI_CROPConfig() function to configure 
*         the coordinates and size of the window to be captured, then enable 
*         the Crop feature using DCMI_CROPCmd(ENABLE);  
*         In this case, the Crop configuration should be made before to enable
*         and start the DCMI interface. 

© COPYRIGHT 2012 STMicroelectronics

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