STC8H用串口2实现的收发通讯协议

#include <STC8H.H> //8H头文件


#include <UART2.H>


#include <UART1.H>


bit busy2;


char Uart2_RecvBuf[30] = {0}; //串口数据缓存


char uart2Index = 0;          //绶存指针


char uart2RXEnd = 0;


char Uart2RXLength = 0;








/*-------------------------------------------屏幕通信初始化----------------------------------------------*/


void Uart2Init(void) //9600bps@11.0592MHz


{


    S2CON = 0x50;        //8位数据,可变波特率


    AUXR |= 0x04;        //定时器2时钟为Fosc,即1T


    T2L = 0xE8;        //设定定时初值


    T2H = 0xFF;        //设定定时初值


    AUXR |= 0x10;        //启动定时器2





    S2CON |= 0x10; //使能接收 S2REN=1


    IE2 |= 0x01;   //使能串口2中断


    EA = 1;


}








/*-------------------------------------------接收信息----------------------------------------------*/


void Uart2() interrupt 8{


    if ((S2CON & S2RI) && uart2RXEnd == 0) {


        S2CON &= ~S2RI; //清除S2RI位


        P47 = ~P47;


        Uart2_RecvBuf[uart2Index] =


                S2BUF;


        if (Uart2_RecvBuf[0] == 0xFE) //Uart2_RecvBuf协议第一个字节是0x5a


        {


            uart2Index++;


        }


        if (uart2Index > 5) {


            uart2Index = 0;


            uart2RXEnd = 1;


        }


    }


    if (S2CON & S2TI) {


        S2CON &= ~S2TI; //清除S2TI位


        busy2 = 0;       //清忙标志


    }


}





char aaa[5] = {0xfe, 0xbb, 0x01, 0x00, 0x16};





void UartRx2(void) {


    if (uart2RXEnd) {


        uart2RXEnd = 0;


        UART1_SendStr(Uart2_RecvBuf);


        SendString2(aaa, 5);


    }





}








/*-------------------------------------------发送----------------------------------------------*/


void SendData2(char dat) {


    while (busy2); //等待前面的数据发送完成


    //ACC = dat;                  //获取校验位P (PSW.0)


    busy2 = 1;


    S2BUF = dat; //写数据到UART2数据寄存器


}








void SendString2(char *s, char length) //发送字符串


{


    while (length != 0) //检测字符串结束标志


    {


        SendData2(*s++); //发送当前字符


        length--;


    }


}