#include "main.h"
#include "LED.H"
#include "keyboard.h"
#include "timer.h"
   extern unsigned int sig=0x01;
   extern unsigned int s=1;



void system_initial(void)   //系統初始化
{
 TMOD=0x11;                 //定時器工作在模式1
 ET0=1;                     //開定時器0中斷
 //TR0=1;                     //啟動定時器0
 EA=1;                      //開總中斷
}



void main(void)            //主函數
{


 system_initial();         //系統開機初始化
 while(1)
  {

   scan_keyboard();        //鍵盤掃描
   timer();                //計時功能


  }
}