關于stc15w4k16s4單片機串口通信的問題,波形不對

ID:478127 · 發表于 2019-3-14 17:16

單片機型號是stc15w4k16s4
用的串口1 P1.6 P1.7即RXD_3 TXD_3引腳做串口通信
程序是：
初始化部分：
      AUXR1 &=0x3F;
      AUXR1 |=0x80;
      SCON = 0x40;
      AUXR |= 0x05;
      T2L = (65536 - (FOSC/4/UART_BAUD));
  T2H = (65536 - (FOSC/4/UART_BAUD))>>8;
      AUXR |= 0x10;
      ES=1; EA=1;
中斷部分：
void Uart() interrupt 4 using 1{
      uint8 rxBuf;

if (RI){
   SCON &= ~RI;
                     rxBuf = SBUF;
}
if (TI){
                     SCON &= ~TI;
                     UartBusy = FALSE;
}
}
void UartSendData(UINT8 dat){
SBUF = dat;
      UartBusy = TRUE;
      while (UartBusy);
}