main.c

基于51系列单片机的介绍IIC的原理与应用的软件设计

/* 
程序功能：  Bank3 PCF8563时钟程序，k1修改小时，k2修改分钟
完成时间：  2007-12-24
*/
#include<at89x52.h>
/*************************************************
	引用外部函数
**************************************************/
extern WRBYTES(unsigned masteraddr,unsigned char Ramaddr,unsigned char buf[],unsigned char num,bit wr);
unsigned char code DisCode[] = {0x0C0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0xFF,0xbf};
                                //共阳极数码管码表，定位在ROM中
unsigned char Disbuf[] = {1,2,0x0b,4,5,0x0b,7,8};	//显示初始化
unsigned char Time[3] ;          //时间信息   
sbit LED_DIG = P1^3;
sbit LED_COM = P1^2;
sbit k1      = P3^2;
sbit k2      = P3^3;
/************************************************
	显示延时
*************************************************/
void Delay(unsigned char j)
{
	unsigned char i;
	for (i=0;i<j;i++ );
}
/************************************************
	带参数传递的显示程序
*************************************************/
void Display(unsigned char Dat[8])
{
	static unsigned char i = 0;
	unsigned LED_Posit = 0x01;
	for(i = 0;i<8;i++)
	{
		P0 = DisCode[Dat[i]];	//送段选
		P0 = DisCode[Dat[i]];	//送段选
		LED_DIG = 1;
		LED_DIG = 0;
		P0 = LED_Posit;				//选通一个数码管
		LED_COM = 1;
		LED_COM = 0;
		Delay(200);
		P0 = 0;				//消隐
		LED_COM = 1;
		LED_COM = 0;
		LED_Posit<<=1;
	}
}
/*************************************
	读入8583计时时间
**************************************/
void Read8583Time()
{
	WRBYTES(0xa2,0x02,Time,3,1);   
	Disbuf[1] = (Time[0]>>4)&0x07;
	Disbuf[0] =  Time[0]&0x0f;		//秒
	Disbuf[4] = (Time[1]>>4)&0x07;
	Disbuf[3] =  Time[1]&0x0f;		//分
	Disbuf[7] = (Time[2]>>4)&0x03;
	Disbuf[6] =  Time[2]&0x0f;		//时
}
/*************************************************
	修改时间
**************************************************/
void KeyInt() 
{
	unsigned char HourGw,HourSw,MinGw,MinSw;
	/////////////加小时/////////////////////
	if(k1 == 0)
	{
		Delay(50);
		if(k1 == 0)
		{	
			while(!k1)  Display(Disbuf);
			HourGw    =  Time[2] & 0x0f ;
			HourSw    = (Time[2] >> 4) & 0x03 ;
			HourGw++;
			if (HourSw < 2)
			{
				if (HourGw == 10)   
				{
					HourSw ++;
					HourGw = 0;
				}
			} 
			else 
			{
				if (HourGw == 4)
				{
					HourSw = 0;
					HourGw = 0;
				}
			}
			Time[2] = ((HourSw<<4) & 0xf0) | (HourGw & 0x0f);       //修改小时
			WRBYTES(0xa2,0x02,Time,3,0);
		}
	}
//////////////加分钟///////////////////
	if(k2 == 0)
	{
		Delay(50);
		if(k2 == 0)
		{	
			while(!k2)  Display(Disbuf);
			MinGw     =  Time[1] & 0x0f ;
			MinSw     = (Time[1] >> 4) & 0x07 ;
	 		MinGw++;
			if(MinGw == 10)
			{
				if(MinSw < 5)		
				{
					MinGw = 0;
					MinSw++;
				}
				else 
				{
					MinGw = 0;
					MinSw  = 0;
				}
			}
			Time[1] = ((MinSw<<4) & 0xf0) | (MinGw & 0x0f);       //修改分钟
			WRBYTES(0xa2,0x02,Time,3,0);
		}
	}
}

/**********************************************************************************
	主函数
***********************************************************************************/
main()
{	           //  ↑----------------------------------------↓
	WRBYTES(0xa2,0x02,Time,3,1);   //读入8583初始时间，//I2C函数中已进行读写判断
	while(1)
	{		
		Read8583Time();
		Display(Disbuf);
		KeyInt(); 
	}
}