93 lines
3.8 KiB
Plaintext
93 lines
3.8 KiB
Plaintext
/**
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@page DMA2D_MemToMemWithLCD DMA2D : DMA2D Memory to Memory with LCD example (HAL/LL mixed usage example)
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@verbatim
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******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
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* @file Examples_MIX/DMA2D/DMA2D_MemToMemWithLCD/readme.txt
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* @author MCD Application Team
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* @brief Description of the DMA2D_MemToMemWithLCD 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 description of how to configure the DMA2D peripheral in
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Memory_to_Memory transfer mode and display the result on LCD, in resorting to
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DMA2D LL APIs for performance improvement.
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The source buffer in format RGB565 and size 128x160 located in Flash is copied
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in Memory to Memory mode by the DMA2D to the LCD.
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In this basic example, the goal is to show how to set some of the DMA2D IP
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parameters thru DMAD LL APIs:
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- input and output image format, alpha value
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- origin and destination buffers addresses
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- transfer size
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- DMA2D interruptions enabling
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- DMA2D transfer start
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STM32F429ZI-Nucleo Rev B boards LEDs can be used to monitor the transfer status:
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- LED1 is ON when the DMA2D transfer is complete.
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- LED2 is ON when there is a DMA2D transfer error.
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- LED3 is ON if the adafruit shield is not detected.
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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, Graphic, DMA2D, Memory to memory, LCD, RGB565
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@par Directory contents
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- DMA2D/DMA2D_MemToMemWithLCD/Inc/stm32f4xx_hal_conf.h HAL configuration file
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- DMA2D/DMA2D_MemToMemWithLCD/Inc/stm32f4xx_it.h Interrupt handlers header file
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- DMA2D/DMA2D_MemToMemWithLCD/Inc/main.h Header for main.c module
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- DMA2D/DMA2D_MemToMemWithLCD/Inc/RGB565_128x160.h RGB565 Image binary
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- DMA2D/DMA2D_MemToMemWithLCD/Src/stm32f4xx_it.c Interrupt handlers
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- DMA2D/DMA2D_MemToMemWithLCD/Src/main.c Main program
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- DMA2D/DMA2D_MemToMemWithLCD/Src/stm32f4xx_hal_msp.c HAL MSP module
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- DMA2D/DMA2D_MemToMemWithLCD/Src/system_stm32f4xx.c STM32F4xx system source file
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@par Hardware and Software environment
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- This example runs on STM32F429xx devices.
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- This example has been tested with STMicroelectronics STM32F429ZI-Nucleo Rev B
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board and can be easily tailored to any other supported device
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and development board.
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- Adafruit 1.8" TFT shield must be connected on CN7, CN8, CN9 and CN10 Arduino connectors,
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for more details please refer to UM1726.
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For more details about the adafruit 1.8" TFT shield, please visit:
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http://www.adafruit.com/blog/2012/04/26/new-product-adafruit-1-8-18-bit-color-tft-shield-wmicrosd-and-joystick/
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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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