STC8H8k64U——定时器T0（60s倒计时）

60s倒计时

#include 
#include "delay.h"

/*74HC245*/
#define OUTPUT P0

/*3——8译码器*/
sbit A0 = P2^2;
sbit A1 = P2^3;
sbit A2 = P2^4;

unsigned char second = 60; //秒计数
unsigned char count = 200; //中断200次为1秒 

unsigned char code LED_7SEG_AN[10] = {0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};     //共阳极数码管0~9
unsigned char code LED_7SEG_CAT[10] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};    //共阴极数码管0~9

void Timer0Init(void)		//5毫秒@24.000MHz
{
	AUXR &= 0x7F;	 //定时器时钟12T模式
	TMOD &= 0xF0;	 //设置定时器模式
	TL0 = 0xF0;		 //设置定时初始值
	TH0 = 0xD8;		 //设置定时初始值
	TF0 = 0;		 //清除TF0标志
	TR0 = 1;		 //定时器0开始计时
}

void main(void)
{
/*准双向口模式*/
	P0M0 = 0x00;
	P0M1 = 0x00;
	P2M0 = 0x00;
	P2M1 = 0xe3;
	EA = 1;          //总中断允许
	ET0 = 1;	       //定时器T0中断允许
/*定时器初始化*/
	Timer0Init();	
	while(1)
	{
		A0 = 1;
		A1 = 0;
		A2 = 0;
		OUTPUT = LED_7SEG_CAT[second/10]; 
		delay_ms(5);
		
		A0 = 0;
		A1 = 0;
		A2 = 0;
		OUTPUT = LED_7SEG_CAT[second%10]; 
		delay_ms(5);	
	}	
}

void Timer0() interrupt 1  
{
	count--;
	if(count == 0)
	{
		count = 200;
		second--;
		if(second == 0)
		{
			second = 60;
		}
	}
}

60s倒计时