最簡但功能齊全之c51框架源代碼（） 
  


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//說明：晶振為12M

#include "reg51.h"

//timer init
void initTimer(void)
{
 TMOD=0x0;
 TH0=0xff;
 TL0=0xff;
}

//UART init
void initUart(void)
{
 TMOD|=0x20;
 SCON=0x50;
 TH1=0xfd;
 TL1=0xfd;
 TR1=1;
 ES=1;
}

//uart interrupt
void uart(void) interrupt 4
{
if(RI)
{
    RI=0;
//add your code here.

}
else
    TI=0;
}
//timer0/counter0 interrupt
void timer0(void) interrupt 1
{
 TH0=0xff;
 TL0=0xff;
 //add your code here.

}

//int0 interrupt
void int0(void) interrupt 0
{
 //add your code here


}

//int1 interrupt
void int1(void) interrupt 2
{
 //add your code here


}

//the main fun
void main(void)
{
IT0=1;     //INT0下降沿中斷
EX0=1;     //允許INT1中斷
IT1=1;     //INT1下降沿中斷
EX1=1;     //允許INT1中斷
initTimer();
initUart();
TR0=1;
ET0=1;
//EA=1;
}