readme.txt

新型M3核ARM STM32的串口通信例程

/******************** (C) COPYRIGHT 2007 STMicroelectronics ********************
* File Name          : readme.txt
* Author             : MCD Application Team
* Date First Issued  : 05/21/2007
* Description        : Description of the USART Example 7.
********************************************************************************
* 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 shows how to retarget the C library printf function to the USART. 
This implementation output the printf message on the Hyperterminal using USARTx.
USARTx can be USART1, USART2 or USART3; to select the USART interface to be used
uncomment the '#define USE_USARTx' line in 'main.h' file.

The USARTx is configured as follow:
    - BaudRate = 115200 baud  
    - Word Length = 8 Bits
    - One Stop Bit
    - No parity
    - Hardware flow control disabled (RTS and CTS signals)
    - Receive and transmit enabled
    - USART Clock disabled
    - USART CPOL: Clock is active low
    - USART CPHA: Data is captured on the second edge 
    - USART LastBit: The clock pulse of the last data bit is not output to 
                     the SCLK pin


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


Hardware environment
====================
 - The USARTx signals (Rx, Tx) must be connected to a DB9 connector using a RS232
   transceiver.

 - Connect a null-modem female/female RS232 cable between the DB9 connector 
   (CN6 for USART1, CN5 for USART2 in the STM32F10x-EVAL board) 
   and PC serial port.  

 - Hyperterminal configuration:
    - Word Length = 8 Bits
    - One Stop Bit
    - No parity
    - BaudRate = 115200 baud
    - flow control: None 


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_usart.c
  + stm32f10x_gpio.c
  + stm32f10x_rcc.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******