ST32 A版的批次为713的是不是串口有问题??谢谢

1万 · 2008-1-26 13:14

我拿到的板是A版的IC,ST的EVAL,

测试的是串口2,用的代码是  ,用的是IAR开发环境,4.42A (4.42.1.501)  **版,    (可以正常演示下载DEMO工程,)
FWLib\examples\USART\Example1

{
    /* USART2 configuration ------------------------------------------------------*/
      /* USART2 configured as follow:
            - BaudRate = 115200 baud
            - Word Length = 8 Bits
            - One Stop Bit
            - No parity
            - Hardware flow control enabled (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 = 115200;
      USART_InitStructure.USART_WordLength = USART_WordLength_8b;
      USART_InitStructure.USART_StopBits = USART_StopBits_1;
      USART_InitStructure.USART_Parity = USART_Parity_No ;
      USART_InitStructure.USART_HardwareFlowControl = USART_HardwareFlowControl_RTS_CTS;
      USART_InitStructure.USART_Mode = USART_Mode_Rx | USART_Mode_Tx;
      USART_InitStructure.USART_Clock = USART_Clock_Disable;
      USART_InitStructure.USART_CPOL = USART_CPOL_High;//USART_CPOL_Low;
      USART_InitStructure.USART_CPHA = USART_CPHA_2Edge;
      USART_InitStructure.USART_LastBit = USART_LastBit_Disable;

      USART_Init(USART2, &USART_InitStructure);//////这个地方参数可以传入,但发现写到寄存器,写完了没看到反应,还是显示为000,所以我怀疑是不是A版的IC有些问题,因为当前的IC听香主说也没有ISP功能,
      /* Enable the USART2 */
      USART_Cmd(USART2, ENABLE);

    /* Communication hyperterminal-USART2 using hardware flow control -------------*/
      /* Send a buffer from USART to hyperterminal */
      while(NbrOfDataToTransfer--)
      {
        USART_SendData(USART2, TxBuffer[TxCounter++]);
        while(USART_GetFlagStatus(USART2, USART_FLAG_TXE) == RESET);   /////走到这就再也走不下去了,因为寄存器一直为0
      }

      /* Receive a string (Max RxBufferSize bytes) from the Hyperterminal ended by '\r' (Enter key) */
      do
      {
        if((USART_GetFlagStatus(USART2, USART_FLAG_RXNE) != RESET)&&(RxCounter < RxBufferSize))
        {
           RxBuffer[RxCounter] = USART_ReceiveData(USART2);
           USART_SendData(USART2, RxBuffer[RxCounter++]);
        }
    }while((RxBuffer[RxCounter - 1] != '\r')&&(RxCounter != RxBufferSize));

}