/**
@page DMA_CopyFromFlashToMemory DMA example
@verbatim
******************** (C) COPYRIGHT 2017 STMicroelectronics *******************
* @file Examples_LL/DMA/DMA_CopyFromFlashToMemory/readme.txt
* @author MCD Application Team
* @brief Description of the DMA example.
******************************************************************************
* @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 Example Description
This example describes how to use a DMA to transfer a word data buffer
from Flash memory to embedded SRAM. Peripheral initialization done using
LL unitary services functions for optimization purpose (performance and size).
At the beginning of the main program the SystemClock_Config() function is used to configure the system
clock (SYSCLK) to run at 100 MHz.
Then the LED_Init() function is used to initialize the LED2.
Then the Configure_DMA() function is used to configure the DMA2_Stream0 to transfer the contents of a 32-word data
buffer stored in Flash memory to the reception buffer declared in RAM.
The start of transfer is triggered by software(LL_DMA_EnableStream()). DMA2_Stream0 memory-to-memory
transfer is enabled. Source and destination addresses incrementing is also enabled.
The transfer is started by setting the channel enable bit for DMA2_Stream0.
At the end of the transfer a Transfer Complete interrupt is generated since it
is enabled and the callback function (customized by user) is called.
Finally, aSRC_Const_Buffer and aDST_Buffer are compared through Buffercmp() in order to
check buffers correctness.
NUCLEO-F411RE's LED2 can be used to monitor the transfer status:
- LED2 is turned ON if the DMA data transfer is successfully completed.
- LED2 is blinking every 1 sec in case of error.
@par Keywords
System, DMA, Data Transfer, Memory to memory, Stream, Flash, SRAM
@par Directory contents
- DMA/DMA_CopyFromFlashToMemory/Inc/stm32f4xx_it.h Interrupt handlers header file
- DMA/DMA_CopyFromFlashToMemory/Inc/main.h Header for main.c module
- DMA/DMA_CopyFromFlashToMemory/Inc/stm32_assert.h Template file to include assert_failed function
- DMA/DMA_CopyFromFlashToMemory/Src/stm32f4xx_it.c Interrupt handlers
- DMA/DMA_CopyFromFlashToMemory/Src/main.c Main program
- DMA/DMA_CopyFromFlashToMemory/Src/system_stm32f4xx.c STM32F4xx system source file
@par Hardware and Software environment
- This example runs on STM32F411xE devices.
- This example has been tested with NUCLEO-F411RE board and can be
easily tailored to any other supported device and development board.
@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 example
*/
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