main.c

实现51单片机的日历功能 用T2定时器作为基本时钟中断

#include <regx52.h>
#include "KeyBoardService.h"
#include "seg.h"

unsigned char press_flag=0;
unsigned char key_value;

#define uchar	unsigned char
uchar deta, sec, min, hour;
uchar display[4];
uchar i,xint_flag;
extern uchar modal;
unsigned int k,j;
unsigned int count_pt;

void T2Init()
{
	T2MOD=0x01;		//自动重装方式2
	T2CON=0x00;
	TH2=0x4c;
	TL2=0x00;
	RCAP2H=0x4c;		//50ms定时0x4c00	修改至54ms 10%
	RCAP2L=0x00;
	ET2=1;
}

void Int0Init()
{
	EX0=1;
	IT0=1;
	PX0=1;
}

void TInit()
{
	TMOD=0x31;		//T0方式1 60ms键盘扫描		T1方式2控制EX0
	TH0=0x28;
	TL0=0x00;
	ET0=1;
	TR0=1;
//	TH1=
}

void Init()
{
	T2Init();
	TInit();
	Int0Init();
}

void T0_Int() interrupt 1
{
	TH0=0x28;
	TL0=0x00;
	key_value = P1|0x1f;
	if(key_value != 0xff)	
	{
		if(press_flag == 0)
			press_flag=1;
		else if(press_flag == 1)
			press_flag = 2;
	}
	else press_flag = 0;
}

void T2_Int() interrupt 5 
{
	EA=0;
	TF2=0;
	deta++;
	if(deta >= 20)
	{
		sec++;
		deta = 0;
	}
	if(sec >= 60)
	{
		sec = 0;
		min++;			
	}
	if(min >= 60)
	{
		min = 0;
		hour++;
	}
	if(hour >= 24)
	{
		hour = 0;
	}
	if(modal == 0)
	{
		if(xint_flag != 1)
		{
			display[3] = min%10;
			display[2] = min/10;
			display[1] = hour%10;
			display[0] = hour/10;
		}
	}
	EA = 1;
}

void Int0() interrupt 0
{
	EA = 0;
	xint_flag = 1;

	EA = 1;
}


void LCDdisplay()
{
	count_pt++;
	for(i=0; i<4; i++)
	{
		WriteCsData(4);
		WriteSegData(display[i]);
		WriteCsData(i);
	}
	if(modal == 1)
	{
		WriteCsData(4);
		WritePoint(1);
		WriteCsData(1);
	}
	else if(modal == 0)
	{
		if(count_pt > 2000)		//display[3]会再次被点亮
		{
			count_pt = 0;	
		}
		else if(count_pt < 1000)
		{
			WriteCsData(4);
			WritePoint(1);
			WriteCsData(1);
		}
		else
		{

		}
	}
}

void delay(unsigned int k)
{
	while(--k)
		for(j = 255; j>0; j--);
}

void main()
{
	Init();
	TR2=1;
	EA=1;
	while(1)
	{
		if(hour > 8 && hour < 22)
		{
			EX0=0;
		}
		else	EX1=1;

		if(xint_flag == 1)
		{
			P1_0=~P1_0;
			delay(10);
		}
		KeyBoardService();
		LCDdisplay();
	}
}