PIC PCF8563T时钟

2019-04-15 14:26发布

#include      __CONFIG(1,XT) ;         //晶振为外部4M __CONFIG(2,WDTDIS) ;      //看门狗关闭 __CONFIG(4,LVPDIS) ;     //禁止低电压编程 #define uint unsigned int #define uchar unsigned char #define nop NOP() #define en RB3 #define rw RB4 #define rs RB5 #define scl   RC5 #define sda   RC6 
uchar p[]="TIME:"; uchar q[]="week";
void delayms(uint z) { uint i,j; for(i=0;i<=110;i++) for(j=0;j<=z;j++); }
void write_com(uchar com) { rs=0; rw=0; delayms(5); en=1; delayms(5); PORTD=com; en=0; delayms(5); }
void write_dat(uchar dat) { rs=1; rw=0; delayms(5); en=1; delayms(5); PORTD=dat; en=0; delayms(5); }
void init_1602() { write_com(0x38); write_com(0x0c); write_com(0x06); write_com(0x01); }
void usdelay() { nop; }
void init_24c() //初始化24C,就是把两根线拉高 { TRISC6=0; scl=1; sda=1; usdelay(); }
void start() //开始信号,根据时序图(sx) { TRISC6=0; scl=1; usdelay(); sda=1; usdelay(); sda=0; }
void stop() //结束信号 sx { TRISC6=0; scl=1; usdelay(); sda=0; usdelay(); sda=1; }
void ack() //不知道为什么,在PIC中不能用ack,好像一用就会出错= =? { uchar i; TRISC6=0; sda=1; nop; TRISC6=1; scl=1; nop; while(sda==1&&i<10)i++; scl=0; }
void write_byte(uchar dat) //写字节 sx 由于不仅要写数据,还要写地址,所以只能先写字节的最高位R7,最后写最低位R0 { uchar i; TRISC6=0; sda=0; scl=0; nop; for(i=0;i<=8;i++) { sda=(dat&0x80)>>7; nop; scl=1; nop; scl=0; dat<<=1; nop; } }
uchar read_byte() //读字节 sx 先读高位R7,最后读地位R0 { uchar i,dat=0; TRISC6=1; sda=0; usdelay(); scl=1; usdelay(); for(i=0;i<8;i++) { dat<<=1; usdelay(); scl=1; nop; dat=dat|sda; nop; scl=0; usdelay(); } return dat; }
void write_add(uchar add,uchar dat) //写数据到地址 sx 注意不要用ack { start(); write_byte(0xa2);
write_byte(add);
write_byte(dat);
stop(); }
uchar read_add(uchar add) //从地址读数据 sx 注意不要用ack { uchar dat; start(); write_byte(0xa2);
write_byte(add);
start(); write_byte(0xa3);
dat=read_byte();
stop(); return dat; }
void main() { uchar temp=0; uchar ii; ADCON1=0x06; TRISC5=0; TRISB=0B11000111; TRISD=0x00; init_1602(); init_24c(); write_com(0x80+0x40+2); write_dat(':'); write_com(0x80+0x40+5); write_dat(':'); write_com(0x80); for(ii=1;ii<=5;ii++) write_dat(*(p+ii-1)); write_com(0x80+0x40+9); for(ii=1;ii<=4;ii++) write_dat(*(q+ii-1)); write_com(0x80+6); write_dat('2'); write_dat('0'); write_com(0x80+10); write_dat('.'); write_com(0x80+13); write_dat('.');

 


while(1) { temp=read_add(0x08);//年 write_com(0x80+8); write_dat(0x30+((temp>>4)&0x07)); write_dat(0x30+(temp&0x0f));
temp=read_add(0x07);//月 write_com(0x80+11); write_dat(0x30+((temp>>4)&0x01)); write_dat(0x30+(temp&0x0f));
temp=read_add(0x06);//星期 write_com(0x80+0x40+14); write_dat(0x30+temp);
temp=read_add(0x05);// 日 write_com(0x80+14); write_dat(0x30+((temp>>4)&0x03)); write_dat(0x30+(temp&0x0f));

temp=read_add(0x04);//时 write_com(0x80+0x40); write_dat(0x30+((temp>>4)&0x03)); write_dat(0x30+(temp&0x0f)); temp=read_add(0x03);//分 write_com(0x80+0x40+3); write_dat(0x30+((temp>>4)&0x07)); write_dat(0x30+(temp&0x0f));
temp=read_add(0x02);//秒 write_com(0x80+0x40+6); write_dat(0x30+((temp>>4)&0x07)); write_dat(0x30+(temp&0x0f)); } }