STM32F2xx DMA配置例程

				/**
				  @page DMA_EXAMPLES DMA examples List
				  
				  @verbatim
				  ******************** (C) COPYRIGHT 2011 STMicroelectronics *******************
				  * @file    DMA/readme.txt 
				  * @author  MCD Application Team  
				  * @version V1.0.0
				  * @date    18-April-2011
				  * @brief   STM32F2xx Standard Peripherals DMA examples List.
				  ******************************************************************************
				  * THE PRESENT FIRMWARE WHICH IS FOR GUIDANCE ONLY AIMS AT PROVIDING CUSTOMERS
				  * WITH CODING INFORMATION REGARDING THEIR PRODUCTS IN ORDER FOR THEM TO SAVE
				  * TIME. AS A RESULT, STMICROELECTRONICS SHALL NOT BE HELD LIABLE FOR ANY
				  * DIRECT, INDIRECT OR CONSEQUENTIAL DAMAGES WITH RESPECT TO ANY CLAIMS ARISING
				  * FROM THE CONTENT OF SUCH FIRMWARE AND/OR THE USE MADE BY CUSTOMERS OF THE
				  * CODING INFORMATION CONTAINED HEREIN IN CONNECTION WITH THEIR PRODUCTS.
				  ******************************************************************************
				   @endverbatim
				   
				In addition to this example (DMA\FLASH_RAM), other examples uses the DMA:
				
				  * 
				  *   Complet List of DMA Examples 
				  * - @subpage ADC_ADC3_DMA
				  * - @subpage DualADC_Interleaved_DMAmode3
				  * - @subpage DualADC_RegulSimu_DMAmode1
				  * - @subpage TripleADC_Interleaved_DMAmode2
				  * - @subpage ADC_VBAT_Measurement
				  * - @subpage AES_ECBmode_DMA
				  * - @subpage TDES_ECBmode_DMA
				  * - @subpage DAC_SignalsGen
				  * - @subpage DCMI_OV9655_Camera  
				  * - @subpage SHA1_MD5_DMA
				  * - @subpage I2C_DataExchangeDMA
				  * - @subpage NVIC_DMA_WFIMode
				  * - @subpage TIM_DMA
				  * - @subpage TIM1_DMABURST
				  * - @subpage USART_DataExchangeDMA
				  * 
				 
				 * © COPYRIGHT 2011 STMicroelectronics
				 */