51单片机定时器操控流水灯及定时器制作

定时器操控LED灯

原理其实就是时钟->计数器->中断系统
分别给他赋值即可

#include <REGX52.H>

void Timer0_Init()
{
	//TMOD = 0x01;
	TMOD = TMOD & 0xF0;
	TMOD = TMOD | 0x01;
	TF0 = 0;
	TR0 = 1;
	TH0 = 64535 / 256;//取高八位
	TL0 = 64535 % 256;//取低八位
	ET0 = 1;
	EA = 1;
	PT0 = 0;
}
unsigned int cnt = 0;
void Timer0_Routine() interrupt 1
{
	//这里主要是将数据还原用的
	TH0 = 64535 / 256;
	TL0 = 64535 % 256;
	cnt++;
	if(cnt >= 1000)
	{
		cnt = 0;
		P2_0 = ~P2_0;
	}
	
}

void main()
{
	Timer0_Init();
	while(1)
	{
		
	}
}

定时器实现流水灯操作

main函数部分

#include <REGX52.H>
#include "key.h"
#include "Timer0Init.h"
#include <INTRINS.h>
//unsigned int cnt = 0;
unsigned int LED_MODE;
void Timer0_Routine() interrupt 1
{
	static unsigned int cnt;
	TL0 = 0x18;		
	TH0 = 0xFC;	
	cnt++;
	if(cnt >= 200)
	{
		cnt = 0;
		if(LED_MODE == 0)
		{
			P2 = _crol_(P2,1);
		}
		if(LED_MODE == 1)
		{
			P2 = _cror_(P2,1);
		}
	}
}
void main()
{
	P2 = 0xFE;
	Timer0Init();
	while(1)
	{
		unsigned char key;
		//unsigned int LED_MODE;
		key = KeyNum();
		if(key)
		{
			if(key == 1)
			{
				LED_MODE++;
				if(LED_MODE >= 2)LED_MODE = 0;
			}
		}
	}
}

各个分函数

定时器

#include <REGX52.H>

void Timer0Init()		
{
	TMOD &= 0xF0;		
	TMOD |= 0x01;		
	TL0 = 0x18;		
	TH0 = 0xFC;		
	TF0 = 0;		
	TR0 = 1;		
	ET0 = 1;
	EA = 1;
	PT0 = 0;
}

按键代码

#include <REGX52.H>
#include "delay.h"

unsigned char key = 0;
unsigned char KeyNum()
{
	if(P3_1 == 0){Delay1ms(20);while(P3_1 == 0);Delay1ms(20);key = 1;}
	if(P3_0 == 0){Delay1ms(20);while(P3_0 == 0);Delay1ms(20);key = 2;}
	if(P3_2 == 0){Delay1ms(20);while(P3_2 == 0);Delay1ms(20);key = 3;}
	if(P3_3 == 0){Delay1ms(20);while(P3_3 == 0);Delay1ms(20);key = 4;}
		
		return key;
}

定时器制作

main函数

#include <REGX52.H>
#include "LCD1602.h"
#include "delay.h"
#include "Timer0Init.h"

unsigned int hour1,min1,sec1;
void Timer0_Routine() interrupt 1
{
	static unsigned int cnt;
	TL0 = 0x18;		
	TH0 = 0xFC;	
	cnt++;
	if(cnt >= 1000)
	{
		cnt = 0;
		sec1++;
		if(sec1 >= 60)
		{
			sec1 = 0;
			min1++;
			if(min1 >= 60)
			{
				min1 = 0;
				hour1++;
				if(hour1 >= 24)
				{
					hour1 = 0;
				}
			}
		}
	}
}
void main()
{
	LCD_Init();
	Timer0Init();
	LCD_ShowString(1,1,"Clock:");
	LCD_ShowString(2,1,"  :  :");
	while(1)
	{
		LCD_ShowNum(2,1,hour1,2);
		LCD_ShowNum(2,4,min1,2);
		LCD_ShowNum(2,7,sec1,2);
	}
}

定时器设置

#include <REGX52.H>

void Timer0Init()		
{
	TMOD &= 0xF0;		
	TMOD |= 0x01;		
	TL0 = 0x18;		
	TH0 = 0xFC;		
	TF0 = 0;		
	TR0 = 1;		
	ET0 = 1;
	EA = 1;
	PT0 = 0;
}