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118 lines
5.8 KiB
Plaintext
118 lines
5.8 KiB
Plaintext
/**
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@page LibJPEG_Decoding LibJPEG decoding application
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@verbatim
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******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
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* @file LibJPEG/LibJPEG_Decoding/readme.txt
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* @author MCD Application Team
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* @brief Description of the LibJPEG decoding application.
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******************************************************************************
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* @attention
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*
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* <h2><center>© COPYRIGHT(c) 2017 STMicroelectronics</center></h2>
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*
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* Redistribution and use in source and binary forms, with or without modification,
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* are permitted provided that the following conditions are met:
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* 1. Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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* 3. Neither the name of STMicroelectronics nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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******************************************************************************
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@endverbatim
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@par Application Description
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This application demonstrates how to read a jpeg file from SDCard memory, decode it
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and display the final BMP image on the LCD.
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The JPEG images should be copied at the micro SD card's root.
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Image samples can be found in ../../../../../Utilities/Media/Pictures/JPG
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The images must have the following properties:
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- named as "image.jpg"
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- 320*240 size
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The image size can be modified by changing IMAGE_WIDTH and IMAGE_HEIGHT defines
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in "main.h" file to decode other resolution than 320x240.
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@note IMAGE_WIDTH and IMAGE_HEIGHT values must be lower or equal to LCD screen resolution.
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- LCD width = 320
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- LCD height = 240
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@note If the displayed image's colors are inverted, please uncomment "SWAP_RB" define in "main.h" file.
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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, LibJPEG, Flash memory, LCD, DMA2D, SD Card, Decoding, ARGB8888, RGB, BMP, JPG
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@par Directory contents
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- LibJPEG/LibJPEG_Decoding/Inc/main.h Main program header file
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- LibJPEG/LibJPEG_Decoding/Inc/sd_diskio.h FatFS sd diskio driver header file
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- LibJPEG/LibJPEG_Decoding/Inc/stm32f4xx_it.h Interrupt handlers header file
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- LibJPEG/LibJPEG_Decoding/Inc/stm32f4xx_hal_conf.h HAL Configuration file
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- LibJPEG/LibJPEG_Decoding/Inc/ffconf.h FAT file system module configuration file
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- LibJPEG/LibJPEG_Decoding/Inc/decode.h Decoder header file
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- LibJPEG/LibJPEG_Decoding/Inc/jmorecfg.h Lib JPEG configuration file (advanced configuration)
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- LibJPEG/LibJPEG_Decoding/Inc/jconfig.h Lib JPEG configuration file
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- LibJPEG/LibJPEG_Decoding/Inc/jdata_conf.h Write/Read methods definition
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- LibJPEG/LibJPEG_Decoding/Src/main.c Main program
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- LibJPEG/LibJPEG_Decoding/Src/sd_diskio.c FatFS sd diskio driver implementation
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- LibJPEG/LibJPEG_Decoding/Src/stm32f4xx_it.c Interrupt handlers
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- LibJPEG/LibJPEG_Decoding/Src/system_stm32f4xx.c STM32F4xx system clock configuration file
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- LibJPEG/LibJPEG_Decoding/Src/decode.c Decoder file
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- LibJPEG/LibJPEG_Decoding/Src/jdata_conf.c Write/Read methods definition
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@par Hardware and Software environment
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- This application runs on STM32F469xx and STM32F479xx devices.
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- This application has been tested with STMicroelectronics STM32469I-EVAL revC
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evaluation boards and can be easily tailored to any other supported device
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and development board.
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- STM32469I-EVAL Set-up
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- Connect a uSD Card to the Micro SD connector (CN17)
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- LED3 is ON if an error occurs.
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@note When the uSD Card is used; the Camera module must be unplugged, this is due to
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the shared pins between the two devices.
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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 application
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* <h3><center>© COPYRIGHT STMicroelectronics</center></h3>
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*/
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