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+/**
+  @page DMA_SPI_RAM DMA SPI to RAM example
+  
+  @verbatim
+  ******************** (C) COPYRIGHT 2011 STMicroelectronics *******************
+  * @file    DMA/SPI_RAM/readme.txt 
+  * @author  MCD Application Team
+  * @version V3.5.0
+  * @date    08-April-2011
+  * @brief   Description of the DMA SPI to RAM example.
+  ******************************************************************************
+  * 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
+
+@par Example Description 
+
+This example provides a description of how to use four DMA channels to transfer
+a data buffer from memory to SPI_SLAVE through SPI_MASTER and a second data buffer
+from memory to SPI_MASTER through SPI_SLAVE in full-duplex mode.
+SPI_MASTER and SPI_SLAVE can be SPI1 and SPI2 or SPI3 and SPI2, depending on the
+STMicroelectronics EVAL board you are using.
+
+For each SPI the NSS pin is configured by software (thus NSS pin is free for GPIO use)
+and DMA Tx/Rx requests are enabled. 
+
+In this example both transmission and reception are managed through DMA and the
+received data are stored into buffers declared in the SRAM. The DMA channels 
+involved in this transfer depend on the used SPIs (for more details please refer
+to platform_config.h file).
+
+A polling on all Transfer complete flags are done for all used DMA channels to
+check the end of all DMA channels transfers. The last received data on SPI_MASTER
+and SPI_SLAVE are the CRC values sent by each SPI to the other.
+The transmitted and received buffers are compared to check that all data have
+been correctly transferred.
+
+
+@par Directory contents 
+
+  - DMA/SPI_RAM/platform_config.h   Evaluation board specific configuration file
+  - DMA/SPI_RAM/stm32f10x_conf.h    Library Configuration file
+  - DMA/SPI_RAM/stm32f10x_it.c      Interrupt handlers
+  - DMA/SPI_RAM/stm32f10x_it.h      Interrupt handlers header file
+  - DMA/SPI_RAM/main.c              Main program
+  - DMA/SPI_RAM/system_stm32f10x.c  STM32F10x system source file
+
+@par Hardware and Software environment 
+
+  - This example runs on STM32F10x Connectivity line, High-Density, Medium-Density, 
+    XL-Density, High-Density Value line, Medium-Density Value line, Low-Density 
+    and Low-Density Value line Devices.
+  
+  - This example has been tested with STMicroelectronics STM32100E-EVAL (High-Density Value line)
+    STM32100B-EVAL (Medium-Density Value line), STM32100E-EVAL (High-Density Value line), STM3210C-EVAL 
+    (Connectivity line), STM3210E-EVAL (High-Density and XL-Density) and STM3210B-EVAL 
+    (Medium-Density) evaluation boards and can be easily tailored to any other 
+    supported device and development board.
+	
+  - STM32100E-EVAL Set-up 
+    - Connect SPI1 SCK pin (PA.05) to SPI2 SCK pin	(PB.13)
+    - Connect SPI1 MISO pin (PA.06) to SPI2 MISO pin (PB.14)
+    - Connect SPI1 MOSI pin (PA.07) to SPI2 MOSI pin (PB.15)  
+    
+  - STM32100B-EVAL Set-up  
+    - Connect SPI1 SCK pin  (PA.05) to SPI2 SCK  pin (PB.13)
+    - Connect SPI1 MISO pin (PA.06) to SPI2 MISO pin (PB.14)
+    - Connect SPI1 MOSI pin (PA.07) to SPI2 MOSI pin (PB.15)
+      
+  - STM3210C-EVAL Set-up 
+    - Connect SPI3 SCK pin (PC.10) to SPI2 SCK pin	(PB.13)
+    - Connect SPI3 MISO pin (PC.11) to SPI2 MISO pin (PB.14)
+    - Connect SPI3 MOSI pin (PC.12) to SPI2 MOSI pin (PB.15)
+    @note In this case SPI3 pins are remapped by software.
+
+  - STM3210E-EVAL Set-up 
+    - Connect SPI1 SCK pin (PA.05) to SPI2 SCK pin	(PB.13)
+    - Connect SPI1 MISO pin (PA.06) to SPI2 MISO pin (PB.14)
+    - Connect SPI1 MOSI pin (PA.07) to SPI2 MOSI pin (PB.15)
+    @note The jumper 14 (USB Disconnect) must be set in position 1<->2 in order
+          to not interfer with SPI2 MISO pin PB14.
+      
+  - STM3210B-EVAL Set-up 
+    - Connect SPI1 SCK pin (PA.05) to SPI2 SCK pin	(PB.13)
+    - Connect SPI1 MISO pin (PA.06) to SPI2 MISO pin (PB.14)
+    - Connect SPI1 MOSI pin (PA.07) to SPI2 MOSI pin (PB.15)    
+ 
+
+@par 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\STM32F10x_StdPeriph_Template
+ - Open your preferred toolchain 
+ - Rebuild all files and load your image into target memory
+ - Run the example 
+
+@note
+ - Low-density Value line devices are STM32F100xx microcontrollers where the 
+   Flash memory density ranges between 16 and 32 Kbytes.
+ - Low-density devices are STM32F101xx, STM32F102xx and STM32F103xx 
+   microcontrollers where the Flash memory density ranges between 16 and 32 Kbytes.
+ - Medium-density Value line devices are STM32F100xx microcontrollers where
+   the Flash memory density ranges between 64 and 128 Kbytes.  
+ - Medium-density devices are STM32F101xx, STM32F102xx and STM32F103xx 
+   microcontrollers where the Flash memory density ranges between 64 and 128 Kbytes.
+ - High-density Value line devices are STM32F100xx microcontrollers where
+   the Flash memory density ranges between 256 and 512 Kbytes.
+ - High-density devices are STM32F101xx and STM32F103xx microcontrollers where
+   the Flash memory density ranges between 256 and 512 Kbytes.
+ - XL-density devices are STM32F101xx and STM32F103xx microcontrollers where
+   the Flash memory density ranges between 512 and 1024 Kbytes.
+ - Connectivity line devices are STM32F105xx and STM32F107xx microcontrollers.
+   
+ * <h3><center>&copy; COPYRIGHT 2011 STMicroelectronics</center></h3>
+ */