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84 lines
3.5 KiB
Plaintext
84 lines
3.5 KiB
Plaintext
/**
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@page DCMI_CaptureMode DCMI Capture Mode example
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@verbatim
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******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
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* @file DCMI/DCMI_CaptureMode/readme.txt
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* @author MCD Application Team
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* @brief Description of the DCMI Capture Mode example.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2017 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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@endverbatim
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@par Example Description
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This example provides a short description of how to use the DCMI to interface with
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camera module and display in continuous mode the picture on LCD.
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At the beginning of the main program the HAL_Init() function is called to reset
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all the peripherals, initialize the Flash interface and the systick.
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Then the SystemClock_Config() function is used to configure the system
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clock (SYSCLK) to run at 180 MHz.
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The Digital camera interface is configured to receive the capture from
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the camera module mounted on STM324x9I-EVAL RevB evaluation board.
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DMA2 Stream1 channel1 is configured to transfer the picture from DCMI peripheral
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to an external RAM.
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At each camera line event, the line is converted to ARGB8888 pixel format
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and transferred to LCD_FRAME_BUFFER using DMA2D.
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The camera module is configured to generate (480x272) image resolution
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and the LCD is configured to display (480x272) image resolution
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@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds)
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based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from
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a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower)
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than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
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To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function.
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@note The application needs to ensure that the SysTick time base is always set to 1 millisecond
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to have correct HAL operation.
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@par Keywords
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Display, DCMI, Camera, Capture, Frame Buffer, LCD, ARGB8888, DMA, RGB565, SDRAM, DMA2D, QQVGA
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@par Directory contents
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- DCMI/DCMI_CaptureMode/Inc/stm32f4xx_hal_conf.h HAL configuration file
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- DCMI/DCMI_CaptureMode/Inc/main.h Main program header file
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- DCMI/DCMI_CaptureMode/Inc/stm32f4xx_it.h Interrupt handlers header file
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- DCMI/DCMI_CaptureMode/Src/main.c Main program
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- DCMI/DCMI_CaptureMode/Src/stm32f4xx_it.c Interrupt handlers
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- DCMI/DCMI_CaptureMode/Src/system_stm32f4xx.c STM32F4xx system clock configuration file
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@par Hardware and Software environment
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- This example runs on STM32F429xx/STM32F439xx devices.
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- This example has been tested with STMicroelectronics STM324x9I-EVAL RevB
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evaluation boards, which includes the AMPIRE480272 LCD and OV2640 camera module,
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and can be easily tailored to any other supported device and development board.
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@par How to use it ?
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In order to make the program work, you must do the following :
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- Open your preferred toolchain
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- Rebuild all files and load your image into target memory
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- Run the example
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*/
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