51单片机DS1302数字时钟

 51单片机DS1302数字时钟

#include 
#define uchar unsigned char
#define uint unsigned int
	
sbit RST = P1^0;
sbit IO = P1^1;
sbit SCLK = P1^2;

sbit HC595_SER = P2^7;      //b     8    d    c    e    e    f    8    f    e
sbit HC595_RCLK = P2^5;     //11    8    13   12   14   14   16   8    16   14
sbit HC595_SRCLK = P2^6;    //1011  1000 1101 1100 1110 1110 1111 1000 1111 1110
//unsigned char code led_dian[]={0xbF,0x86,0xdB,0xcF,0xe6,0xeD,0xfD,0x87,0xfF,0xeF};
unsigned char code led_duan[]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};

unsigned char hour,hour1,hour2;
unsigned char min,min1,min2;
unsigned char sec,sec1,sec2;


void Delay_Ms(uchar q)
{
	uchar p;
	while(q--)
	{
		for(p=0;p<113;p++);
	}
}
//数据发送子程序
 void send_595(unsigned char dat)
{
	unsigned char i;
  for(i=0;i<8;i++)
  {
		if(dat&0x80)
			HC595_SER = 1;
		else
			HC595_SER = 0;
		
		HC595_SRCLK = 0;
		HC595_SRCLK = 1;
		dat = dat<<1;
	}	
}
//
void write_byte(uchar date)
{
	uchar i;
	SCLK = 0;
	for(i=0;i<8;i++)
	{
		SCLK = 0;
		IO = date & 0x01;
		SCLK = 1;
		date >>= 1;
	}
}
//
void write_ds1302(uchar addr,uchar date)
{
	uchar num;
	RST = 0;
	SCLK = 0;
	RST = 1;
	write_byte(addr);
	num = (date/10<<4)|(date%10);
	write_byte(num);
	RST = 0;
	SCLK = 1;
}
//
uchar read_byte()
{
	uchar i;
	uchar dat = 0x00;
	for(i=0;i<8;i++)
	{
		SCLK = 0;
		dat >>= 1;
		if(IO)
		{
			dat |= 0X80;
		}
		
		SCLK = 1;
		SCLK = 0;
	}
	return dat;
}
//
uchar read_ds1302(uchar addr)
{
	uchar dat;
	uchar dat1;
	uchar dat2;
	
	RST = 0;
	SCLK = 0;
	RST = 1;
	write_byte(addr);
	dat = read_byte();
  RST = 0;
	SCLK = 1;
	
	dat1 = dat/16;
	dat2 = dat%16;
	dat = dat1*10+dat2;  //转换为10进制
	
	return dat;
}
//
void init_ds1302()   //偶数
{
	write_ds1302(0x8e,0x00);
	                          //未写入年月日和星期
	write_ds1302(0x84,23);  //时
	write_ds1302(0x82,59);  //分
	write_ds1302(0x80,50);  //秒
	
	write_ds1302(0x8e,0x80);
}
//
void get_time()       //奇数
{
	write_ds1302(0x8e,0x00); 
	                          //未读取年月日和星期
	hour = read_ds1302(0x85); //时
	min = read_ds1302(0x83);  //分
	sec = read_ds1302(0x81);  //秒
	
	write_ds1302(0x8e,0x80);
}


void main()
{
	init_ds1302();
	Delay_Ms(5);
	while(1)
	{
		get_time();
		
		hour1 = hour/10;
		hour2 = hour%10;
		min1 = min/10;
		min2 = min%10;
		sec1 = sec/10;
		sec2 = sec%10;
		
		send_595(0xfe);
		send_595(led_duan[hour1]);
		HC595_RCLK = 0;     //0->1 上升沿发送。
    HC595_RCLK = 1;		
		
		send_595(0xfd);
		send_595(led_duan[hour2]);
		HC595_RCLK = 0;
    HC595_RCLK = 1;
		
		send_595(0xfb);
		send_595(0x40);
		HC595_RCLK = 0;
    HC595_RCLK = 1;
		
		send_595(0xf7);
		send_595(led_duan[min1]);
		HC595_RCLK = 0;
    HC595_RCLK = 1;
		
		send_595(0xef);
		send_595(led_duan[min2]);
		HC595_RCLK = 0;
    HC595_RCLK = 1;
		
		send_595(0xdf);
		send_595(0x40);
		HC595_RCLK = 0;
    HC595_RCLK = 1;
		
		send_595(0xbf);
		send_595(led_duan[sec1]);
		HC595_RCLK = 0;
    HC595_RCLK = 1;
		
		send_595(0x7f);
		send_595(led_duan[sec2]);
		HC595_RCLK = 0;
    HC595_RCLK = 1;
	}
}

个人见解，感谢阅读。