STC15W201S 串口调试

knight

#include "reg51.h"
#include "intrins.h"

sfr S2CON = 0x9A;
sfr AUXR = 0x8E;
sfr T2L = 0xD7;
sfr T2H = 0xD6;

sfr S2BUF = 0x9B;
sfr IE2 = 0xAF;
//sfr IP2 = 0xB5;
sfr P_SW2 = 0xBA;

#define S2RI  0x01
#define S2TI  0x02 

unsigned char tmp;

//发送一个字符
void send_char(unsigned char dat)
{
ACC = dat;
    S2BUF = ACC;
}

void delay(unsigned char ms)
{
while(ms--);
}


void UartInit(void)         //19200bps@11.2592MHZ
{
S2CON = 0x50;    //8位数据，可变波特率
AUXR |= 0x40;    //定时器2时钟为Fosc，即1T
T2L = 0x70;      //设置定时初值
T2H = 0xFF;      //设置定时初值
AUXR |= 0x10;    //启动定时器2
}

void main()
{
P_SW2 = 0x01;     //串口2切换到P3.6/P3.7
IE = 0x80;           //总中断使能
IE2 = 0x01;          //串口2中断使能

UartInit();

while(1)
{

}
}

void Uart2() interrupt 8 using 1
{
  if(S2CON & S2RI)
{
//S2RI = 0;
S2CON &= ~S2RI;        //清除S2RI位
tmp = S2BUF;
delay(10);
// send_char(tmp);
} 

if(S2CON & S2TI)
{
S2CON &= ~S2TI;         //清除S2TI位
delay(10);
send_char(tmp);
}
}


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