DMA FLASH to RAM example

  ******************** (C) COPYRIGHT 2014 STMicroelectronics *******************
  * @file    DMA/DMA_FLASHRAMTransfer/readme.txt 
  * @author  MCD Application Team
  * @version V1.4.0
  * @date    24-July-2014
  * @brief   Description of the DMA FLASH to RAM example.
  ******************************************************************************
  *
  * Licensed under MCD-ST Liberty SW License Agreement V2, (the "License");
  * You may not use this file except in compliance with the License.
  * You may obtain a copy of the License at:
  *
  *        http://www.st.com/software_license_agreement_liberty_v2
  *
  * Unless required by applicable law or agreed to in writing, software 
  * distributed under the License is distributed on an "AS IS" BASIS, 
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  *
  ******************************************************************************
   

Example Description

This example provides a description of how to use a DMA channel to transfer a word data buffer from FLASH memory to embedded SRAM memory.

DMA1 Channel1 is configured 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. 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. Once interrupt is generated, the remaining data to be transferred is read which must be equal to 0. The Transfer Complete Interrupt pending bit is then cleared. A comparison between the source and destination buffers is done to check that all data have been correctly transferred.

Directory contents

• DMA/DMA_FLASHRAMTransfer/stm32f0xx_conf.h Library Configuration file
• DMA/DMA_FLASHRAMTransfer/stm32f0xx_it.c Interrupt handlers
• DMA/DMA_FLASHRAMTransfer/stm32f0xx_it.h Interrupt handlers header file
• DMA/DMA_FLASHRAMTransfer/main.c Main program
• DMA/DMA_FLASHRAMTransfer/main.h Header for main.c module
• DMA/DMA_FLASHRAMTransfer/system_stm32f0xx.c STM32F0xx system source file

Note:

The "system_stm32f0xx.c" is generated by an automatic clock configuration tool and can be easily customized to meet user application requirements. To select different clock setup, use the "STM32F0xx_Clock_Configuration_VX.Y.Z.xls" provided with the AN4055 package available on ST Microcontrollers

Hardware and Software environment

• This example runs on STM32F0xx devices.

• This example has been tested with STMicroelectronics STM320518-EVAL and STM32072B-EVAL including respectively STM32F051R8T6 and STM32F072VBT6 devices and can be easily tailored to any other supported device and development board

How to use it ?

In order to make the program work, you must do the following :

• Copy all source files from this example folder to the template folder under Project
• Open your preferred toolchain
• Select the appropriate workspace
• Rebuild all files and load your image into target memory
• Run the example

© COPYRIGHT STMicroelectronics