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/** | ||
@page FatFs_uSD FatFs with uSD card drive application | ||
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@verbatim | ||
******************** (C) COPYRIGHT 2016 STMicroelectronics ******************* | ||
* @file FatFs/FatFs_uSD/readme.txt | ||
* @author MCD Application Team | ||
* @brief Description of the FatFs with uSD card drive application. | ||
****************************************************************************** | ||
* @attention | ||
* | ||
* Copyright (c) 2016 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 | ||
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@par Application Description | ||
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This application provides a description on how to use STM32Cube firmware with FatFs | ||
middleware component as a generic FAT file system module, in order to develop an | ||
application exploiting FatFs offered features with microSD drive configuration. | ||
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At the beginning of the main program the HAL_Init() function is called to reset | ||
all the peripherals, initialize the Flash interface and the systick. | ||
Then the SystemClock_Config() function is used to configure the system | ||
clock (SYSCLK) to run at 216 MHz. | ||
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- Link the uSD disk I/O driver; | ||
- Register the file system object (mount) to the FatFs module for the uSD drive; | ||
- Create a FAT file system (format) on the uSD drive; | ||
- Create and Open new text file object with write access; | ||
- Write data to the text file; | ||
- Close the open text file; | ||
- Open text file object with read access; | ||
- Read back data from the text file; | ||
- Close the open text file; | ||
- Check on read data from text file; | ||
- Unlink the uSD disk I/O driver. | ||
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It is worth noting that the application manages any error occurred during the | ||
access to FAT volume, when using FatFs APIs. Otherwise, user can check if the | ||
written text file is available on the uSD card. | ||
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It is possible to fine tune needed FatFs features by modifying defines values | ||
in FatFs configuration file �ffconf.h� available under the project includes | ||
directory, in a way to fit the application requirements. | ||
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STM32 Discovery board's LEDs can be used to monitor the application status: | ||
- LED1 is ON when the application runs successfully. | ||
- LED1 toggles when any error occurs. | ||
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For more details about FatFs implementation on STM32Cube, please refer to UM1721 "Developing Applications | ||
on STM32Cube with FatFs". | ||
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@par Keywords | ||
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FatFS, SDMMC, SD Card, File system, FAT Volume, Format, Mount, Read, Write, | ||
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@Note�If the user code size exceeds the DTCM-RAM size or starts from internal cacheable memories (SRAM1 and SRAM2),that is shared between several processors, | ||
�����then it is highly recommended to enable the CPU cache and maintain its coherence at application level. | ||
������The address and the size of cacheable buffers (shared between CPU and other masters) must be properly updated to be aligned to cache line size (32 bytes). | ||
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@Note It is recommended to enable the cache and maintain its coherence, but depending on the use case | ||
����� It is also possible to configure the MPU as "Write through", to guarantee the write access coherence. | ||
������In that case, the MPU must be configured as Cacheable/Bufferable/Not Shareable. | ||
������Even though the user must manage the cache coherence for read accesses. | ||
������Please refer to the AN4838 �Managing memory protection unit (MPU) in STM32 MCUs� | ||
������Please refer to the AN4839 �Level 1 cache on STM32F7 Series� | ||
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@par Directory contents | ||
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- FatFs/FatFs_uSD/Inc/stm32f7xx_hal_conf.h HAL configuration file | ||
- FatFs/FatFs_uSD/Inc/stm32f7xx_it.h Interrupt handlers header file | ||
- FatFs/FatFs_uSD/Inc/main.h Main program header file | ||
- FatFs/FatFs_uSD/Inc/ffconf.h FAT file system module configuration file | ||
- FatFs/FatFs_uSD/Src/sd_diskio.h SD diskio header file | ||
- FatFs/FatFs_uSD/Src/stm32f7xx_it.c Interrupt handlers | ||
- FatFs/FatFs_uSD/Src/main.c Main program | ||
- FatFs/FatFs_uSD/Src/system_stm32f7xx.c STM32F7xx system clock configuration file | ||
- FatFs/FatFs_uSD/Src/sd_diskio.c SD diskio source file | ||
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@par Hardware and Software environment | ||
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- This application runs on STM32F746xx devices. | ||
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- This example has been tested with STMicroelectronics STM32746G-DISCOVERY | ||
boards RevB and can be easily tailored to any other supported device. | ||
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- STM32746G-DISCOVERY Set-up | ||
- Connect a uSD Card to the MSD connector (CN3). | ||
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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 : | ||
- Open your preferred toolchain | ||
- Rebuild all files and load your image into target memory | ||
- Run the example | ||
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*/ |