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51單片機(jī)60s動(dòng)態(tài)顯示程序
#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
uchar code table[]={0xc0,0xf9,0xa4, 0xb0,0x99,
0x92,0x82,0xf8,0x80,0x90};
sbit gew=P2^1;
sbit shiw=P2^0;
sbit k2=P1^0;
uchar num,num1=60,num2,shi,ge;
void Init() //初始化子函數(shù)
{
TMOD=0X01; //設(shè)定定時(shí)器0的工作方式為1
TH0=(65536-50000)/256; //定時(shí)器裝初值一個(gè)周期50ms
TL0=(65536-50000)%256;
EA=1; //開(kāi)總中斷
ET0=1; //開(kāi)定時(shí)器0中斷
TR0=1; //啟動(dòng)定時(shí)器0
}
void delay(uint xms) //延時(shí)子函數(shù)
{
uint i,j;
for(i=xms;i>0;i--)
for(j=110;j>0;j--);
}
void scankey() //鍵盤(pán)檢測(cè)子函數(shù)
{
if(k2==0) //檢測(cè)鍵是否被按下
{
delay(5); //延時(shí)消除抖動(dòng)
if(k2==0) //重新讀取k2的值
{
num2++; //num2為按次數(shù)標(biāo)志位
while(!k2); //等待按鍵釋放
if(num2==1) //按鍵一次計(jì)時(shí)停止
TR0=0;
if(num2==2) //按鍵兩次計(jì)時(shí)開(kāi)始
{
TR0=1;
}
}
}
}
void main() //主函數(shù)
{
Init(); //初始化子函數(shù)調(diào)用
while(1)
{
scankey(); //不斷鍵盤(pán)掃描
gew=1; //打開(kāi)數(shù)碼管個(gè)位位選
P0=table[ge]; //數(shù)碼管個(gè)位賦值
delay(1); //延時(shí) 送入數(shù)據(jù)的反應(yīng)時(shí)間
gew=0; //關(guān)閉數(shù)碼管個(gè)位位選
delay(1);
shiw=1; //打開(kāi)數(shù)碼管十位位選
P0=table[shi]; //送入數(shù)據(jù)
delay(1);
shiw=0; //關(guān)閉數(shù)碼管十位位選
delay(1);
}
}
void Timer0()interrupt 1
{
TH0=(65536-50000)/256; //定時(shí)器重裝初值
TL0=(65536-50000)%256;
num++;
if(num==20) //定時(shí)器每進(jìn)行一個(gè)周期num加1，運(yùn)行20個(gè)周期即為1s
{
num=0; //到1秒，num清0重新開(kāi)始
num1--; //倒計(jì)時(shí)1秒
if(num1==0)
num1=60;
shi=num1/10; //兩位數(shù)分離賦給數(shù)碼管十位顯示
ge=num1%10; //兩位數(shù)分離賦給數(shù)碼管個(gè)位顯示
}
}
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仿真圖片
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