/**
@page LibJPEG_Decoding LibJPEG decoding application
@verbatim
******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
* @file LibJPEG/LibJPEG_Decoding/readme.txt
* @author MCD Application Team
* @brief Description of the LibJPEG decoding application.
******************************************************************************
* @attention
*
* Copyright (c) 2017 STMicroelectronics.
* All rights reserved.
*
* This software is licensed under terms that can be found in the LICENSE file
* in the root directory of this software component.
* If no LICENSE file comes with this software, it is provided AS-IS.
*
******************************************************************************
@endverbatim
@par Application Description
This application demonstrates how to read jpeg file from SDCard memory, decode it
and display the final BMP image on the LCD.
The JPEG images should be copied at the micro SD card root.
The images must have the following properties:
- named as "image.jpg"
- 320*240 size
The image size can be modified by changing IMAGE_WIDTH and IMAGE_HEIGHT defines
in "main.h" file to decode other resolution than 320x240.
@note IMAGE_WIDTH and IMAGE_HEIGHT values must be lower or equal to LCD screen resolution.
- LCD width = 320
- LCD height = 240
Uncomment "SWAP_RB" define in "main.h" file if the displayed image color
are inverted
The image transferring to the LCD_FRAME_BUFFER can be done with two ways;
with CPU or with DMA2D. Uncomment "USE_DMA2D" define for DMA2D transfer and
"DONT_USE_DMA2D" for CPU transfer in main.h file.
@note Care must be taken when using HAL_Delay(), this function provides accurate delay (in milliseconds)
based on variable incremented in SysTick ISR. This implies that if HAL_Delay() is called from
a peripheral ISR process, then the SysTick interrupt must have higher priority (numerically lower)
than the peripheral interrupt. Otherwise the caller ISR process will be blocked.
To change the SysTick interrupt priority you have to use HAL_NVIC_SetPriority() function.
@note The application needs to ensure that the SysTick time base is always set to 1 millisecond
to have correct HAL operation.
@par Keywords
Display, Graphic, LibJPEG, Flash memory, LCD, DMA2D, SD Card, Decoding, ARGB8888, RGB, BMP, JPG
@par Directory contents
- LibJPEG/LibJPEG_Decoding/Inc/main.h Main program header file
- LibJPEG/LibJPEG_Decoding/Inc/sd_diskio.h FatFS sd diskio driver header file
- LibJPEG/LibJPEG_Decoding/Inc/stm32f4xx_it.h Interrupt handlers header file
- LibJPEG/LibJPEG_Decoding/Inc/stm32f4xx_hal_conf.h HAL Configuration file
- LibJPEG/LibJPEG_Decoding/Inc/ffconf.h FAT file system module configuration file
- LibJPEG/LibJPEG_Decoding/Inc/decode.h decoder header file
- LibJPEG/LibJPEG_Decoding/Inc/jmorecfg.h Lib JPEG configuration file (advanced configuration).
- LibJPEG/LibJPEG_Decoding/Inc/jconfig.h Lib JPEG configuration file.
- LibJPEG/LibJPEG_Decoding/Inc/jdata_conf.h Write/Read methods definition
- LibJPEG/LibJPEG_Decoding/Src/main.c Main program
- LibJPEG/LibJPEG_Decoding/Src/sd_diskio.c FatFS sd diskio driver implementation
- LibJPEG/LibJPEG_Decoding/Src/stm32f4xx_it.c Interrupt handlers
- LibJPEG/LibJPEG_Decoding/Src/system_stm32f4xx.c STM32F4xx system clock configuration file
- LibJPEG/LibJPEG_Decoding/Src/decode.c decoder file
- LibJPEG/LibJPEG_Decoding/Src/jdata_conf.c Write/Read methods definition
@par Hardware and Software environment
- This application runs on STM32F427x/STM32F437x/STM32F429x/STM32F439x Devices.
- This application has been tested with STM324x9I-EVAL RevB evaluation board
and can be easily tailored to any other supported device and development board.
- STM324x9I-EVAL Set-up
- Connect a uSD Card to the MSD connector (CN17).
@note When the uSD Card is used; the Camera module must be unplugged, this is due to
the shared pins between the two devices.
@par How to use it ?
In order to make the program work, you must do the following :
- Open your preferred toolchain
- Rebuild all files and load your image into target memory
- Run the application
*/
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