ds.c

基于51单片机的点阵显示设计源代码加仿真

#include <at89x51.h>
#include "led.h"
sbit rst=P2^5;
sbit sclk=P2^7;
sbit io=P2^6;
unsigned int second[2]={0,0},min[2]={0,0},hour[2]={0,0};

void write_ds1302(unsigned char dat)
{
	 unsigned char i=0;
	 sclk=0;
	 for (i=0;i<8;i++)
	 {
	 	 if (dat&0x01) io=1;
		 else io=0;
		 sclk=1;
		 sclk=0;
		 dat=dat>>1;
	 }
}
void write_data(unsigned char address,unsigned char dat)
{
	 rst=0;
	 sclk=0;
	 rst=1;
	 write_ds1302(address);
	 write_ds1302(dat);
	 sclk=1;
	 rst=0;
}
unsigned char read_ds1302(void)
{
	 unsigned char receive=0,i=0;
	 sclk=0;
	 for (i=0;i<8;i++)
	 {
	 	 receive=receive>>1;
		 if (io==1) receive=receive|0x80;
		 sclk=1;
		 sclk=0;
	 }
	 return (receive);
}
unsigned char read_dat(unsigned char address)
{
	 unsigned char receive1=0,i=0;
	 rst=0;
	 sclk=0;
	 rst=1;
	 write_ds1302(address);
	 io=1;
	 receive1=read_ds1302();
	 sclk=1;
	 rst=0;
	 return (receive1);
}
void ds1302(void)
{
	 rst=0;
	 sclk=0;
	 rst=1;
	 write_ds1302(0x8e);
  	 write_ds1302(0);
	 //sclk=1;
	 rst=0;
	 write_ds1302(0x90);
  	 write_ds1302(0xa5);
	 rst=0;
	 write_data(0x8e,0);
	 write_data(0x80,0);
	 write_data(0x82,9);
	 write_data(0x84,33);
	 write_data(0x86,0x22);
	 write_data(0x88,0x07);
	 write_data(0x8C,0x08);
	 rst=0;
	 sclk=0;
	 rst=1;
	 write_ds1302(0x8e);
     write_ds1302(0x80);
	 //sclk=1;
	 rst=0;
}
void dsplay_ds1302(void)
{
		second[0]=read_dat(0x81);
		second[1]=second[0];
		second[0]=second[0]&0x0f;
		second[1]=second[1]&0x70;
		second[1]=second[1]>>4;

		min[0]=read_dat(0x83);
		min[1]=min[0];
		min[0]=min[0]&0x0f;
		min[1]=min[1]&0x70;
		min[1]=min[1]>>4;
		hour[1]=hour[0];
		hour[0]=hour[0]&0x0f;
		hour[1]=hour[1]&0x3f;
		hour[1]=hour[1]>>4;
}