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/**
@page DMA_CopyFromFlashToMemory DMA example
@verbatim
******************************************************************************
* @file Examples_LL/DMA/DMA_CopyFromFlashToMemory/readme.txt
* @author MCD Application Team
* @brief Description of the DMA example.
******************************************************************************
*
* Copyright (c) 2019 STMicroelectronics. All rights reserved.
*
* This software component is licensed by ST under BSD 3-Clause license,
* the "License"; You may not use this file except in compliance with the
* License. You may obtain a copy of the License at:
* opensource.org/licenses/BSD-3-Clause
*
******************************************************************************
@endverbatim
@par Example Description
How to use a DMA channel to transfer a word data buffer
from Flash memory to embedded SRAM. The peripheral initialization uses
LL unitary service functions for optimization purposes (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 64 MHz.
Then the LED_Init() function is used to initialize the LED2.
Then the Configure_DMA() function is used to configure the DMA1_Channel1 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_EnableChannel()). DMA1_Channel1 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 DMA1_Channel1.
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.
P-NUCLEO-WB55's LED2 can be used to monitor the transfer status:
- LED2 is turn on if DMA data transferred consistency.
- 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/stm32wbxx_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/stm32wbxx_it.c Interrupt handlers
- DMA/DMA_CopyFromFlashToMemory/Src/main.c Main program
- DMA/DMA_CopyFromFlashToMemory/Src/system_stm32wbxx.c STM32WBxx system source file
@par Hardware and Software environment
- This example runs on STM32WB55RGVx devices.
- This example has been tested with P-NUCLEO-WB55 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
* <h3><center>© COPYRIGHT STMicroelectronics</center></h3>
*/
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