// Timer 0 take as interrupt 
// Timer 1 take as delay

#include <reg51.h>

// 宣告延時函式
void delay10ms(void);

unsigned int timer0_counter = 150;

void main(void){
	
	//開啟 Timer0 和 Timer1
	TMOD = 0x11;

	//interrupt control 
	TL0 = (65536 - 9216) % 256;
	TH0 = (65536 - 9216) / 256;
	TF0 = 0;
	TR0 = 1;	//開啟計時器 timer0
	ET0 = 1;	//開啟 TF0 的中斷模組開關
	EA = 1;		//開啟中斷模組總開關

  delay10ms();

	while(1){
	  // do LED move up to down per 1.5 sec
    // using Timer 1 Mode 1 to generate 10ms delay
	}
}


void delay10ms(void){
	//設定初始值
	TF1 = 0;
  TR1 = 0;
	TL1 = (65536-9216) % 256;
	TH1 = (65536-9216) / 256;
	
  //開啟計時器 timer1
	TR1 = 1;
	
  //當 TF1 沒有溢位
  while(TF1 == 0);
	
	//關閉計時器
	TR1 = 0;
	
	//將 TF1 歸零
	TF1 = 0;
}


// timer0 在計時到的時候(TF0 = 1)會呼叫的中斷副函式
void my_timer0(void) interrupt 1 {
	
	//設定初始值
	TL0 = (65536 - 9216) % 256;
	TH0 = (65536 - 9216) / 256;
  TF0 = 0;
	
  // timer0_counter 一直遞減
	timer0_counter--;
	
	
	//當 timer0_counter 為 0 時，實作七段顯示器
  if (timer0_counter == 0){
    // 實作七段顯示器
		
		
		//將 timer0_counter 的值設回 150
    timer0_counter = 150;
		
  }
}