SPI_DMA

  ******************** (C) COPYRIGHT 2010 STMicroelectronics *******************
  * @file    SPI/DMA/readme.txt 
  * @author  MCD Application Team
  * @version V3.4.0
  * @date    10/15/2010
  * @brief   Description of the SPI DMA 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.
  ******************************************************************************
   
Example Description

This example provides a description of how to set a communication between the two SPIs in simplex mode and performs a transfer from SPI_MASTER in polling mode to the SPI_SLAVE in DMA receive mode.

SPI_MASTER and SPI_SLAVE can be SPI1 and SPI2 or SPI3 and SPI2, depending on the STMicroelectronics EVAL board you are using.

Both SPIs are configured with 8bit data frame and a 18Mbit/s communication speed. SPI_MASTER is configured in bidirectional mode as transmitter only, while SPI_SLAVE is configured in bidirectional mode but as receiver only. Both master and slave NSS pins are managed by hardware. A dedicated DMA channel is configured for SPI_SLAVE Rx request to store received data in SPI_SLAVE_Buffer_Rx.

SPI_MASTER starts by transferring the first data, once this data is received by the SPI_SLAVE the RxNE request will trigger the DMA to transfer this data and store it into SPI_SLAVE_Buffer_Rx. The same action is done for the rest of the buffer.

Once the transfer is completed a comparison is done and TransferStatus gives the data transfer status where it is PASSED if transmitted and received data are the same otherwise it is FAILED.

Directory contents
Hardware and Software environment
How to use it ?

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

Tip: You can tailor the provided project template to run this example, for more details please refer to "stm32f10x_stdperiph_lib_um.chm" user manual; select "Peripheral Examples" then follow the instructions provided in "How to proceed" section.

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.

© COPYRIGHT 2010 STMicroelectronics

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