usart_tr.c

STM32F103开发板上用的程序

/******************** (C) COPYRIGHT 2008 STMicroelectronics ********************
* File Name          : usart_1_2.c
* Author             : MCD Tools development Team
* Date First Issued  : Oct. 2007
* Description        : This code is used for MB672 board test
********************************************************************************
* History:
* May 19, 2008: V1.1
* April 30, 2008: V1.0
* April 16, 2008: V0.2
* March 19, 2008: V0.1
* Oct. 19, 2007: V0.01
********************************************************************************/

/* Includes ------------------------------------------------------------------*/

#include "usart_tr.h"

u8 TxBuffer1[] = "Buffer Send from USART1 to USART2 using Flags";
u8 TxBuffer2[] = "Buffer Send from USART2 to USART1 using Flags";
u8 RxBuffer1[TxBufferSize];
u8 RxBuffer2[TxBufferSize];
u8 TxCounter = 0, RxCounter = 0;

//-----------------------------------------------------------------
//   USART 1 initialization
//   USART 1 on ev board Corresponds to USART 1(1 of 1~5) of MCU
//-----------------------------------------------------------------
u8 USART_Init_Test(void)
{
  USART_InitTypeDef USART_InitStructure;
  TestStatus status;
  /* USART1 and USART2 configuration ------------------------------------------------------*/
  /* USART and USART2 configured as follow:
        - BaudRate = 230400 baud
        - Word Length = 8 Bits
        - One Stop Bit
        - Even 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
  */
  USART_InitStructure.USART_BaudRate = 230400;
  USART_InitStructure.USART_WordLength = USART_WordLength_8b;
  USART_InitStructure.USART_StopBits = USART_StopBits_1;
  USART_InitStructure.USART_Parity = USART_Parity_Even;
  USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_None;
  USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
  
  //USART_InitStructure.USART_Clock = USART_Clock_Disable;
  //USART_InitStructure.USART_CPOL = USART_CPOL_Low;
  //USART_InitStructure.USART_CPHA = USART_CPHA_2Edge;
  //USART_InitStructure.USART_LastBit = USART_LastBit_Disable;

  USART_Init(USART1, &USART_InitStructure);
  USART_Init(USART2, &USART_InitStructure);


  USART_Cmd(USART1, ENABLE);
  USART_Cmd(USART2, ENABLE);

  while(TxCounter < TxBufferSize)
  {
    // Send one byte from USART1 to USART2
    USART_SendData(USART1, TxBuffer1[TxCounter++]);

    // Loop until the end of transmit 
    while(USART_GetFlagStatus(USART1, USART_FLAG_TC) == RESET);

    // Loop until the USART2 Receive Data Register is not empty 
    while(USART_GetFlagStatus(USART2, USART_FLAG_RXNE) == RESET);
    
    // Store the received byte in RxBuffer
    RxBuffer1[RxCounter++] = (USART_ReceiveData(USART2) & 0x7F);

  }
  // Check the received data with the send ones 
  //TransferStatus = Buffercmp(TxBuffer, RxBuffer, TxBufferSize);
  status = Buffercmp(TxBuffer1, RxBuffer1, TxBufferSize);
  if(status == 0)
    return USART_TEST_FAIL;
	
  else{
		TxCounter = 0, RxCounter = 0;
		while(TxCounter < TxBufferSize)
		{
			// Send one byte from USART2 to USART1
			USART_SendData(USART2, TxBuffer2[TxCounter++]);
			
			// Loop until the end of transmit 
			while(USART_GetFlagStatus(USART2, USART_FLAG_TC) == RESET);

			// Loop until the USART2 Receive Data Register is not empty 
			while(USART_GetFlagStatus(USART1, USART_FLAG_RXNE) == RESET);
			
			// Store the received byte in RxBuffer
			RxBuffer2[RxCounter++] = (USART_ReceiveData(USART1) & 0x7F);
			
		}
		
		// Check the received data with the send ones 
		//TransferStatus = Buffercmp(TxBuffer, RxBuffer, TxBufferSize);
		status = Buffercmp(TxBuffer2, RxBuffer2, TxBufferSize);
		
		if(status == 0)
			return USART_TEST_FAIL;
		
		else
			return USART_TEST_PASS;
	}
}