蓝桥杯单片机学习过程记录(八)时钟芯片
#include<STC15F2K60S2.H>
#include<intrins.h>
sbit sck=P1^7;
sbit io=P2^3;
sbit ce=P1^3;
unsigned char seg[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0xbf,0xff};
unsigned char yi,er,san,si,wu,liu,qi,ba;
unsigned char init_time[]={50,59,23,0,0,0,0};
unsigned char shijian[7];
void delayms(int ms);
void display_12(yi,er);
void display_34(san,si);
void display_56(wu,liu);
void display_78(qi,ba);
void allinit();
void ds1302_init();
void ds1302_get();
unsigned char ds1302_read(unsigned char address);
void ds1302_write(unsigned char address,unsigned char dat);
void write_byte(unsigned char temp);
void main(void){
allinit();
ds1302_init();
while(1){
ds1302_get();
yi=shijian[2]/10;er=shijian[2]%10;san=10;
si=shijian[1]/10;wu=shijian[1]%10;liu=10;
qi=shijian[0]/10;ba=shijian[0]%10;
display_12(yi,er);
display_34(san,si);
display_56(wu,liu);
display_78(qi,ba);
}
}
void ds1302_get(void){
unsigned char i,add;
add=0x81;
ds1302_write(0x8e,0x00);
for(i=0;i<7;i++){
shijian[i]=ds1302_read(add);
add=add+2;
}
ds1302_write(add,0x80);
}
void ds1302_init(void){
unsigned char i,add;
add=0x80;
ds1302_write(0x8e,0x00);
for(i=0;i<7;i++){
ds1302_write(add,init_time[i]);
add=add+2;
}
ds1302_write(0x8e,0x80);
}
void ds1302_write(unsigned char address,unsigned char dat){
unsigned char i;
ce=0;_nop_();
sck=0;_nop_();
ce=1;
for(i=0;i<8;i++){
sck=0;
io=address&0x01;
_nop_();
sck=1;
address>>=1;
}
dat=(((dat/10)<<4)|(dat%10));
for(i=0;i<8;i++){
sck=0;
io=dat&0x01;
sck=1;
dat>>=1;
}
}
unsigned char ds1302_read(unsigned char address){
unsigned int i;
unsigned int temp;
unsigned int dat_1;
unsigned int dat_2;
ce=0;sck=0;ce=1;
write_byte(address);
for(i=0;i<8;i++){
sck=0;
temp>>=1;
if(io)
temp|=0x80;
sck=1;
}
io=0;
dat_1=temp/16;
dat_2=temp%16;
temp=dat_1*10+dat_2;
return temp;
}
void write_byte(unsigned char temp){
unsigned char i;
for(i=0;i<8;i++){
sck=0;
io=temp&0x01;
sck=1;
temp>>=1;
}
}
void allinit(){
P2=0XA0;P0=0X00;
P2=0XC0;P0=0XFF;P2=0XE0;P0=0XFF;
P2=0X80;P0=0XFF;
yi=11;er=11;san=11;si=11;wu=11;liu=11;qi=11;ba=11;
}
void display_12(yi,er){
P2=0XC0;P0=0X01;P2=0XE0;P0=seg[yi];
delayms(1);
P2=0XC0;P0=0X02;P2=0XE0;P0=seg[er];
delayms(1);
}
void display_34(san,si){
P2=0XC0;P0=0X04;P2=0XE0;P0=seg[san];
delayms(1);
P2=0XC0;P0=0X08;P2=0XE0;P0=seg[si];
delayms(1);
}
void display_56(wu,liu){
P2=0XC0;P0=0X10;P2=0XE0;P0=seg[wu];
delayms(1);
P2=0XC0;P0=0X20;P2=0XE0;P0=seg[liu];
delayms(1);
}
void display_78(qi,ba){
P2=0XC0;P0=0X40;P2=0XE0;P0=seg[qi];
delayms(1);
P2=0XC0;P0=0X80;P2=0XE0;P0=seg[ba];
delayms(1);
}
void delayms(int ms){
int q,w;
for(q=0;q<ms;q++)
for(w=0;w<845;w++);
}