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#include <AT89X52.h>
#define DSbus P0
#define LCDbus P1
//定義DS12C887和LCD的控制線
sbit DS_CS = P2^7; //引腳13,片選信號輸入,低電平有效。
sbit DS_AS = P2^4; //引腳14,地址選通輸入。
sbit DS_RW = P2^5; //引腳15,讀/寫輸入。
sbit DS_DS = P2^6; //引腳17,數據選通或讀輸入。
sbit LCD_RS=P2^0;
sbit LCD_EN=P2^2;
//時間變量定義
unsigned char Counter;
unsigned char Hour,Min,Sec,Year,Month,Date,Week;
/*DS12CR887驅動程序---------------------------------------------------------------------------*/
//往DS12CR887寫數據函數
void DS12887write(unsigned char add,unsigned char Date)
{
DS_CS=0;
DS_DS=1;
DS_RW=1;
DS_AS=1;
DSbus=add;
DS_AS=0;
DS_RW=0;
DSbus=Date;
DS_RW=1;
DS_AS=1;
DS_CS=1;
}
//讀取DS12CR887數據函數
unsigned char DS12887read(unsigned char add)
{
unsigned char z;
DS_CS=0;
DS_RW=1;
DS_DS=1;
DS_AS=1;
DSbus=add;
DS_AS=0;
DS_DS=0;
DSbus=0xff;
z=DSbus;
DS_DS=1;
DS_AS=1;
DS_CS=1;
return z;
}
//DS12CR887初始化函數
void DS12887LCDinit()
{
DS_AS=0; DS_DS=0; DS_RW=0;
DS12887write(0x0a,0x20);//DS12CR887寄存器A功能設置，開啟時鐘振蕩器
DS12887write(0x0b,0x06);//寄存器B功能設置，不開啟鬧鐘中斷使能，數據模式為二進制，24小時模式。
//DS12887write(4,0x8);DS12887write(2,0x00);DS12887write(0,0x00); //給DS12CR887的時分秒賦值，開機后顯示8:00:00
}
void Delay(unsigned int z)
{
unsigned int x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void LCDwritecom(unsigned char com)
{
LCD_RS=0;
LCDbus=com;
Delay(5);
LCD_EN=1;
Delay(5);
LCD_EN=0;
}
void LCDwritecomdata(unsigned char dat)
{
LCD_RS=1;
LCDbus=dat;
Delay(5);
LCD_EN=1;
Delay(5);
LCD_EN=0;
}
void LCDinit()
{
LCD_EN=0;
LCDwritecom(0x38);
LCDwritecom(0x0c);
LCDwritecom(0x06);
LCDwritecom(0x01);
LCDwritecom(0x80);
}
void Timedisplay(void)
{
//LCDwritecom(1);
LCDwritecom(0x80);
//往液晶屏填寫"小時"數據-----------------------------------------------
Hour=DS12887read(4); //讀取DS12CR887的小時數據
if((Hour/10)==0)LCDwritecomdata(0);
else LCDwritecomdata(Hour/10+0x30);//小時十位
LCDwritecomdata(Hour%10+0x30); //小時個位
LCDwritecomdata(':'); //時鐘分隔符":"
//往液晶屏填寫"分鐘"數據-----------------------------------------------
Min=DS12887read(2); //讀取DS12CR887的分數據
LCDwritecomdata(Min/10+0x30);
LCDwritecomdata(Min%10+0x30);
LCDwritecomdata(':'); //時鐘分隔符":"
//往液晶屏填寫"秒"數據-------------------------------------------------
Sec=DS12887read(0); //讀取DS12CR887的秒數據
LCDwritecomdata(Sec/10+0x30);
LCDwritecomdata(Sec%10+0x30);
Delay(100);
}
void Datedisplay(void)
{
//LCDwritecom(1);
LCDwritecom(0xc0);
//往液晶屏填寫"年"數據-----------------------------------------------
LCDwritecomdata('2');
LCDwritecomdata('0');
Year=DS12887read(9); //讀取DS12CR887的年數據
LCDwritecomdata(Year/10+0x30);//年十位
LCDwritecomdata(Year%10+0x30); //年個位
LCDwritecomdata('/'); //時鐘分隔符":"
//往液晶屏填寫"月"數據-----------------------------------------------
Month=DS12887read(8); //讀取DS12CR887的月數據
LCDwritecomdata(Month/10+0x30);
LCDwritecomdata(Month%10+0x30);
LCDwritecomdata('/'); //時鐘分隔符":"
//往液晶屏填寫"日"數據-------------------------------------------------
Date=DS12887read(7); //讀取DS12CR887的日數據
LCDwritecomdata(Date/10+0x30);
LCDwritecomdata(Date%10+0x30);
//往液晶屏填寫"星期"數據-------------------------------------------------
Week=DS12887read(6); //讀取DS12CR887的日數據
LCDwritecomdata(0);
LCDwritecomdata(Week-1+0x30);
Delay(100);
}
void main()
{
// unsigned char i;
LCDinit();
DS12887LCDinit();
DS12887write(0x0a,0x00); //開始調時，DS12CR887關閉時鐘振蕩器
DS12887write(0,55); //秒
DS12887write(2,59);
DS12887write(4,23);
DS12887write(6,5); //星期
DS12887write(7,22); //日
DS12887write(8,9); //
DS12887write(9,12); //
//display_Date();
while(1)
{
Timedisplay();
Datedisplay();
Delay(100);
}
}

復制代碼

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