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138 lines
6.7 KiB
Plaintext
138 lines
6.7 KiB
Plaintext
/**
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@page LCD_AnimatedPictureFromSDCard LCD animated picture from SD card application
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@verbatim
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******************************************************************************
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* @file Display/LCD_AnimatedPictureFromSDCard/readme.txt
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* @author MCD Application Team
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* @brief Description of the LCD animated picture from SD card 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 describes how to display an animated picture on LCD saved under
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microSD.
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The animated picture is the display of an images sequence with a determined
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frequency to be seen like a animated image.
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The user has to copy the two directories "BACK" and "TOP" available from
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"./Media/" to the root of micro SD card.
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* Background picture display
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----------------------------
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Once the LCD, SD card and file system initialized and configured, a check
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of the existence and the content of the "/BACK" directory is done.
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* Foreground animated pictures display
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-------------------------------------
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A content check of the "/TOP" directory is done and the number of ".BMP" files
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is retained.
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@note : The maximum number of BMP file is fixed at 25. It can be raised
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until reaching the maximum of SD card memory space.
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@note : the system clock (SYSCLK) is configured to run at 180 MHz and 50 MHz is provided
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at the output PLL divided by PLL_Q. This frequency permit to reach 25 MHz clock
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needed for SD operation and in line with microSD specification.
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The following steps are performed to scroll all the images stored in the
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SD Card :
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- The foreground layer is set, the image copied from SD card (from "/TOP" directory)
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to intermediate SDRAM memory space and then copied to LCD frame buffer.
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- The color keying feature is applied to remove the bottom of foreground layer (transparent)
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and then replaced by the background layer.
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- Jump to next image
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@note :
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=> If the "/TOP" directory is empty, a warning message is displayed on the LCD :
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" No Bitmap files... "
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=> If the file type stored in the "/BACK" or "/TOP" directories is not supported,
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a warning message is displayed on the LCD : " file type not supported. "
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=> If the SD card is not inserted, a warning message is displayed on the LCD :
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" Open directory.. fails"
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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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- LED3 is ON when the uSD disk I/O driver is not Linked;
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@par Keywords
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Graphic, Display, LCD, Pictures, SD Card, BMP, Background, Foreground, Layers,
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@par Directory contents
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- Display/LCD_AnimatedPictureFromSDCard/Inc/main.h Main configuration file
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- Display/LCD_AnimatedPictureFromSDCard/Inc/sd_diskio.h FatFS sd diskio driver header file
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- Display/LCD_AnimatedPictureFromSDCard/Inc/stm32f4xx_it.h Interrupt handlers header file
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- Display/LCD_AnimatedPictureFromSDCard/Inc/stm32f4xx_hal_conf.h HAL Configuration file
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- Display/LCD_AnimatedPictureFromSDCard/Inc/ffconf.h FAT file system module configuration file
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- Display/LCD_AnimatedPictureFromSDCard/Inc/fatfs_storage.h Header for fatfs_storage.c
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- Display/LCD_AnimatedPictureFromSDCard/Src/main.c Main program
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- Display/LCD_AnimatedPictureFromSDCard/Src/sd_diskio.c FatFS sd diskio driver implementation
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- Display/LCD_AnimatedPictureFromSDCard/Src/fatfs_storage.c Storage (FatFs) driver
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- Display/LCD_AnimatedPictureFromSDCard/Src/stm32f4xx_it.c Interrupt handlers
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- Display/LCD_AnimatedPictureFromSDCard/Src/system_stm32f4xx.c STM32F4xx system clock configuration file
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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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@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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- The two directories "BACK" and "TOP" from "./Media/Pictures/Animated"
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folder must be copied at the micro SD card root.
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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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