readme.txt

STM32 SPI口的应用例程

/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
* File Name          : readme.txt
* Author             : MCD Application Team
* Date First Issued  : 05/21/2007
* Description        : Description of the SPI Example3.
********************************************************************************
* History:
* 05/21/2007: V0.3
********************************************************************************
* THE PRESENT SOFTWARE 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 SOFTWARE 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 two
SPIs in full-duplex mode and performs a transfer from Master to Slave and  
Slave to Master followed by CRC transmission.
SPI1 is configured as master and SPI2 as slave and both are in full-duplex
configuration mode with 16bit data size and a 4.5Mbit/s communication speed.
CRC calculation is enabled for both SPIs.
After enabling both SPIs, the first data from SPI2_Buffer_Tx is transmitted from
slave followed by the first data from SPI1_Buffer_Tx send by the master. A test 
on RxNE flag is done for both master and slave to check the reception of data on
their respective data register. The same procedure is done for the remaining data
to transfer except the last ones. Last data from SPI1_Buffer_Tx and SPI2_Buffer_Tx
are transmitted successively followed by enabling CRC transmission for both SPI1
and SPI2: user must take care to reduce code on this phase for high speed
communication. 
Last transmitted buffer data and CRC value are then received successively on
master and slave data registers. The received CRC value are stored on CRC1_Value
and CRC2_Value respectively for SPI1 and SPI2.
Once the transfer is completed a comparison is done and TransferStatus1 and 
TransferStatus2 gives the data transfer status for each data transfer direction 
where it is PASSED if transmitted and received data are the same otherwise it 
is FAILED.


Directory contents
==================
stm32f10x_conf.h  Library Configuration file
stm32f10x_it.c    Interrupt handlers
stm32f10x_it.h    Interrupt handlers header file
main.c            Main program


Hardware environment
====================
 - Connect SPI1 SCK (PA.05) pin to SPI2 SCK (PB.13) pin
 - Connect SPI1 MISO (PA.06) pin to SPI2 MISO (PB.14) pin
 - Connect SPI1 MOSI (PA.07) pin to SPI2 MOSI (PB.15) pin


How to use it
=============
In order to make the program work, you must do the following :
- Create a project and setup all your toolchain's start-up files
- Compile the directory content files and required Library files :
  + stm32f10x_lib.c
  + stm32f10x_spi.c
  + stm32f10x_rcc.c
  + stm32f10x_gpio.c
  + stm32f10x_nvic.c
  + stm32f10x_flash.c
    
- Link all compiled files and load your image into either RAM or FLASH
- Run the example


******************* (C) COPYRIGHT 2007 STMicroelectronics *****END OF FILE******