STC12C5A60S2 串口2通讯

/*串口2接收和发送字节*/ #include"STC12C5A60S2.H" #define uchar unsigned char #define uint unsigned int uchar a,temp; bit flag; void Uart2_Init(void) //115200bps@11.0592MHz { S2CON = 0x50; //8位数据,可变波特率 AUXR &= 0xF7; //波特率不倍速 AUXR |= 0x04; //独立波特率发生器时钟为Fosc,即1T AUXR |= 0x10; //启动独立波特率发生器 AUXR1|= 0X10; // P1TO P4 BRT = 0xFD; //设定独立波特率发生器重装值 IE2=0X01; // ES2=1; EA=1; } void uart2_send( uchar rectemp) { unsigned char temp=0; IE2 = 0X00; //ES2=0; S2CON = S2CON&0XFD; //Clear TI flag S2BUF =rectemp; do{ temp = S2CON; temp = temp&0x02; }while(temp == 0); //Send data until temp`s value is true; S2CON=S2CON&0XFD; //Clear TI flag after send is over.. IE2=0X01; //Enable uart 2 interrupt. } uchar Uart2_receive(void) { uchar k,h; uint i; for(i=0;i<65500;i++) { h=S2CON; h&=0x01; //S2RI=1 if(h==1) { S2CON = S2CON & 0xFE; //清接收标志位 S2RI=0; k=S2BUF; break; } } return k; } void main() { Uart2_Init(); while(1) { if(flag==1) { flag=0; uart2_send( a ); } } } void uartReceive_2(void) interrupt 8 //receive { unsigned char k = 0; k = S2CON; k = k&0X01; if(k == 1) { S2CON = S2CON&0XFE; //清 S2RI //Add code here! a=Uart2_receive; flag=1; } else { S2CON=S2CON&0XFD; //S2TI=0 } }