76 lines
3.1 KiB
Plaintext
76 lines
3.1 KiB
Plaintext
/**
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@page DMA_CopyFromFlashToMemory DMA example
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@verbatim
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******************** (C) COPYRIGHT 2016 STMicroelectronics *******************
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* @file Examples_LL/DMA/DMA_CopyFromFlashToMemory/readme.txt
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* @author MCD Application Team
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* @brief Description of the DMA example.
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******************************************************************************
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* @attention
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*
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* Copyright (c) 2016 STMicroelectronics.
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* All rights reserved.
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*
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* This software is licensed under terms that can be found in the LICENSE file
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* in the root directory of this software component.
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* If no LICENSE file comes with this software, it is provided AS-IS.
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*
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******************************************************************************
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@endverbatim
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@par Example Description
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This example describes how to use a DMA channel to transfer a word data buffer
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from Flash memory to embedded SRAM. Peripheral initialization done using
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LL unitary services functions for optimization purpose (performance and size).
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At the beginning of the main program the SystemClock_Config() function is used to configure the system
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clock (SYSCLK) to run at 72 MHz.
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Then the LED_Init() function is used to initialize the LED2.
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Then the Configure_DMA() function is used to configure the DMA1_Channel1 to transfer the contents of a 32-word data
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buffer stored in Flash memory to the reception buffer declared in RAM.
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The start of transfer is triggered by software(LL_DMA_EnableChannel()). DMA1_Channel1 memory-to-memory
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transfer is enabled. Source and destination addresses incrementing is also enabled.
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The transfer is started by setting the channel enable bit for DMA1_Channel1.
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At the end of the transfer a Transfer Complete interrupt is generated since it
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is enabled and the callback function (customized by user) is called.
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Finally, aSRC_Const_Buffer and aDST_Buffer are compared through Buffercmp() in order to
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check buffers correctness.
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STM32F103RB-Nucleo's LED2 can be used to monitor the transfer status:
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- LED2 is turn on if DMA data transferred consistency.
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- LED2 is blinking every 1 sec in case of error.
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@par Directory contents
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- DMA/DMA_CopyFromFlashToMemory/Inc/stm32f1xx_it.h Interrupt handlers header file
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- DMA/DMA_CopyFromFlashToMemory/Inc/main.h Header for main.c module
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- DMA/DMA_CopyFromFlashToMemory/Inc/stm32_assert.h Template file to include assert_failed function
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- DMA/DMA_CopyFromFlashToMemory/Src/stm32f1xx_it.c Interrupt handlers
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- DMA/DMA_CopyFromFlashToMemory/Src/main.c Main program
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- DMA/DMA_CopyFromFlashToMemory/Src/system_stm32f1xx.c STM32F1xx system source file
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@par Hardware and Software environment
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- This example runs on STM32F103xB devices.
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- This example has been tested with STM32F103RB-Nucleo board and can be
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easily tailored to any other supported device 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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- Open your preferred toolchain
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- Rebuild all files and load your image into target memory
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- Run the example
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*/
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