pcf8563.c

采用51单片机编程用pcf8563实现时钟功能

#include<reg51.h> 
#include <intrins.h> 

#define uchar unsigned char 
#define uint unsigned int 

sbit pcf8563_scl=P0^4; 
sbit pcf8563_sda=P0^3; 


uchar num[10]={0x30,0x31,0x32,0x33,0x34,0x35,0x36,0x37,0x38,0x39}; //数字表 

sbit clk=P2^0; 
sbit dio=P2^1; 
sbit cfd=P2^2; //充放电开关， 
sbit en=P2^3; 
sbit rw=P2^4; 
sbit rs=P2^5; 
sbit deng=P2^6; //测试灯 
sbit adcs=P2^7; 

bit busy=0; 

uchar sg; 
uchar sd; 

uchar fg; 
uchar fd; 

uchar mg; 
uchar md; 

uchar hou=0; 
uchar min=0; 
uchar sec=0; 

uchar subadd; 
uchar dat; 

uchar number; 

void start_pcf8563(); 
void send_pcf8563_byte(); 

void LcdIni(void); 
void WrOp(uchar dat); 
void WrDat(uchar dat); 
void ChkBusy(void); 

void display0(void); 
void display1(void); 

void stop_pcf8563(); 
void receive_pcf8563_byte(); 
void spit_time(); 



void LcdIni()//初始化LCD 
{WrOp(0x01); 
WrOp(0x38); 
WrOp(0x0c); 
WrOp(0x06); 
} 


void WrOp(uchar dat)//写LCD显示地址 
{ 

P1 =dat; 
rs=0; 
rw=0; 
en=0; 
ChkBusy(); 
en=1; 
} 


void WrDat(uchar dat)//写LCD显示数据 
{ P1=dat; 
rs=1; 
rw=0; 
en=0; 
ChkBusy(); 
en=1; 
} 


void ChkBusy() //检查LCD是否忙 
{ 
P1=0xff; 
rs=0; 
rw=1; 
en=0; 
_nop_(); 
en=1; 
while(P1&0x80); 
} 


void display0() //显示必要的背景 
{ 
WrOp(0x80); 
WrDat('T'); 

WrOp(0x81); 
WrDat(':'); 

WrOp(0x84); 
WrDat(':'); 

WrOp(0x87); 
WrDat(':'); 
} 

void spit_time() 
{ 
sg=(int)hou/10; 
sd=(int)hou%10; 

fg=(int)min/10; 
fd=(int)min%10; 

mg=(int)sec/10; 
md=(int)sec%10; 
} 

void display1()//显示时间六位 
{ 
uchar temp6; 
uchar temp5; 
uchar temp4; 
uchar temp3; 
uchar temp2; 
uchar temp1; 

WrOp(0x82); 
temp6=num[sg]; 
WrDat(temp6); 

WrOp(0x83); 
temp5=num[sd]; 
WrDat(temp5); 

WrOp(0x85); 
temp4=num[fg]; 
WrDat(temp4); 

WrOp(0x86); 
temp3=num[fd]; 
WrDat(temp3); 

WrOp(0x88); 
temp2=num[mg]; 
WrDat(temp2); 

WrOp(0x89); 
temp1=num[md]; 
WrDat(temp1); 
} 

void Send_pcf8563_byte(uchar bb) //向PCF8563发送一个字节 
{ 
uchar aa; 
pcf8563_scl=0; 
for(aa=0;aa<8;aa++) 
{ 
if((bb&0x80)==0x80) 
{ 
pcf8563_sda=1; 
} 
else 
{ 
pcf8563_sda=0; 
} 

pcf8563_scl=1; 

pcf8563_scl=0; 
bb=bb<<1; 
} 
_nop_(); 
_nop_(); 
pcf8563_sda=1; 

pcf8563_scl=1; 

busy=0; 
if(pcf8563_sda) 
{ 
busy=1; 
} 
else 
{ 
_nop_(); 
_nop_(); 
pcf8563_scl=0; 
busy=0; 
} 
} 

void write_pcf8563(uchar subadd,uchar dat)// 向PCF8563对应地址写数据 
{ 
start_pcf8563(); 
Send_pcf8563_byte(0xa2); 
if(!busy) 
{ 
Send_pcf8563_byte(subadd); 
if(!busy) 
{ 
Send_pcf8563_byte(dat); 

} 
} 
stop_pcf8563(); 
} 

void read_pcf8563() //读当时的时，分，钞 
{ 
start_pcf8563(); 
Send_pcf8563_byte(0xa2); 

if(!busy) 
{ 
Send_pcf8563_byte(0x02); 
if(!busy) 
{ 
start_pcf8563(); 
Send_pcf8563_byte(0xa3); 
receive_pcf8563_byte(); 
sec=number&0x7f; 


start_pcf8563(); 
Send_pcf8563_byte(0xa3); 
receive_pcf8563_byte(); 
min=number&0x7f; 


start_pcf8563(); 
Send_pcf8563_byte(0xa3); 
receive_pcf8563_byte(); 
hou=number&0x3f; 

} 
} 
stop_pcf8563(); 
} 

void receive_pcf8563_byte() //从PCF8563接受一个字节 
{uchar cc; 
pcf8563_sda=1; 
number=0; 
for(cc=0;cc<8;cc++) 
{ 
number<<=1; 
pcf8563_scl=0; 

pcf8563_scl=1; 
_nop_(); 
_nop_(); 
number= number|pcf8563_sda; 
} 
pcf8563_scl=0; 
_nop_(); 
_nop_(); 

} 



void start_pcf8563() //开启PCF8563IIC 
{ 
pcf8563_sda=1; 
pcf8563_scl=1; 
pcf8563_sda=0;//SCL为低，SDA执行一个上跳 

pcf8563_scl=0;//SCL为低，嵌住数据线 
} 

void stop_pcf8563() //关闭PCF8563IIC 
{ 
pcf8563_sda=0; 
pcf8563_scl=1; 
pcf8563_sda=1;//SCL为高，SDA执行一个上跳 

pcf8563_scl=0;//SCL为低，嵌住数据线 
} 


void main(void) 
{ 
LcdIni(); //初始化屏 
display0(); //显示必要的背影 

write_pcf8563(0x02,sec); //写钞 
write_pcf8563(0x03,min); //写分 
write_pcf8563(0x04,hou); //写时 


while(1) 
{ 
read_pcf8563();//读当前时间 
spit_time(); //切害时间，为显示做准备 
display1(); //显示当前时间 
} 
}