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#include <intrins.h>
#define uchar unsigned char
#define uint unsigned int
sbit rs=P1^0;//寄存器選擇
sbit rw=P1^1;//讀寫信號線
sbit lcden=P1^2;//led使能端
sbit scl=P1^3;//時鐘線
sbit rst=P1^5;//復位線
sbit io=P1^4;//數據口
sbit key_set_time=P3^4;//設置時間鍵
sbit key_add=P3^5;//加鍵
sbit key_minus=P3^6;//減鍵
sbit key_set_alarm=P3^7;//設置鬧鐘鍵
sbit bee=P1^6;//蜂鳴器接口
sbit dq=P1^7;//ds18b20測溫
uchar getTimebuf[7];//存放時間數據
uchar time[]={" : : "};//時間格式字符串
uchar date[]={"20 - - "};//日期格式字符串
uchar weeklist[]={"SunMonTueWedThuFriSat"};//星期字符列表
uchar week[]={" "};//星期格式字符串
int count;//設定秒分時日月星期年的時候count的值分別為1235647
int alarm;//是否進入鬧鐘設置界面 123分別代表開關分小時的設置
int isOpen;//鬧鐘是否開啟默認不開啟
int fen,shi;//鬧鐘的分鐘小時
int isRing;//鬧鐘是否在響
uchar isInit_1302;//是否初始化時鐘完畢
int num;
int temperature;//溫度
int temp_flag;//溫度正負標志
void delay(uint x){
int y;
while(x--){
for(y=100;y>0;y--);
}
}
void write_1602com(uchar com){
//1602寫指令
rs=0;
lcden=0;
P2=com;
delay(5);
lcden=1;
delay(5);
lcden=0;
}
void write_1602data(uchar dat){
//1602寫數據
rs=1;
lcden=0;
P2=dat;
delay(5);
lcden=1;
delay(5);
lcden=0;
}
void init_1602(){
//初始化1602液晶
rw=0;
lcden=0;
write_1602com(0x38);//設置顯示模式
write_1602com(0x0c);//顯示開關及光標是否顯示和閃動
write_1602com(0x06);//光標移動方向
write_1602com(0x01);//清屏
}
void write_ds1302_byte(uchar temp){
//ds1302寫一個字節數據
uchar i;
for(i=0;i<8;i++){
io=temp&0x01;//將數據放到IO口上
scl=0;//scl為低時準備數據
scl=1;//上升沿寫入
temp>>=1;
}
}
void write_ds1302(uchar add,uchar dat){
//向地址add寫入數據dat
rst=0;
scl=0;
rst=1;
write_ds1302_byte(add);
write_ds1302_byte(dat);
scl=1;
rst=0;
}
uchar read_ds1302(uchar add){
//ds1302讀數據
uchar i,dat;
rst=0;
scl=0;
rst=1;
write_ds1302_byte(add);//首先寫入要讀的數據處的地址
for(i=0;i<8;i++){
if(io==1){
dat|=0x80;
}
scl=1;
scl=0;//下降沿讀取數據
dat>>=1;
}
scl=1;
rst=0;
return dat;
}
void read_time(uchar curr_time[]){
uchar i;
uchar ucAddr = 0x81;
for (i=0;i<7;i++){
curr_time[i] = read_ds1302(ucAddr);//格式為: 秒分時日月星期年
ucAddr += 2;
}
}
void set_time(uchar *pSecDa){
//設定時間
uchar i;
uchar ucAddr = 0x80;
write_ds1302(0x8e,0x00);
for(i =7;i>0;i--){
write_ds1302(ucAddr,*pSecDa); //秒分時日月星期年
pSecDa++;
ucAddr+=2;
}
write_ds1302(0x8e,0x80);
}
void init_ds1302(){
//ds1302初始化
isInit_1302=read_ds1302(0x81);//讀出時鐘狀態
if(isInit_1302&0x80){//說明沒有初始化
write_ds1302(0x8e,0x00);//關閉寫保護以后一直開著
write_ds1302(0x90,0xa5); //輔助電源充電命令一個二極管一個2K電阻
write_ds1302(0x80,0x00);//秒 CH置0 開啟時鐘
write_ds1302(0x82,0x59);//分
write_ds1302(0x84,0x10);//時
write_ds1302(0x86,0x07);//日
write_ds1302(0x88,0x05);//月
write_ds1302(0x8a,0x04);//星期
write_ds1302(0x8c,0x14);//年
write_ds1302(0x8e,0x80);
}
}
char int_to_char(int temp){
//把0到9對應的數字轉為字符
char x='0';
switch(temp){
case 0:x='0';break;
case 1:x='1';break;
case 2:x='2';break;
case 3:x='3';break;
case 4:x='4';break;
case 5:x='5';break;
case 6:x='6';break;
case 7:x='7';break;
case 8:x='8';break;
case 9:x='9';break;
}
return x;
}
int ds18b20_read_temp();
void display(){
uchar bai,shi,ge,point,fuhao;
read_time(getTimebuf);//時時讀取時間
time[6]=(getTimebuf[0])/16+48;//格式化時間秒
time[7]=(getTimebuf[0])%16+48;
time[3]=(getTimebuf[1])/16+48;//格式化時間分
time[4]=(getTimebuf[1])%16+48;
time[0]=(getTimebuf[2])/16+48;//格式化時間小時
time[1]=(getTimebuf[2])%16+48;
date[8]=getTimebuf[3]/16+48;//格式化日期日
date[9]=getTimebuf[3]%16+48;
date[5]=getTimebuf[4]/16+48;//格式化日期月
date[6]=getTimebuf[4]%16+48;
date[2]=getTimebuf[6]/16+48;//格式化日期年
date[3]=getTimebuf[6]%16+48;
week[0]=weeklist[(getTimebuf[5]%10)*3];//格式化星期
week[1]=weeklist[(getTimebuf[5]%10)*3+1];
week[2]=weeklist[(getTimebuf[5]%10)*3+2];
write_1602com(0x80+1);
for(num=0;num<10;num++){
write_1602data(date[num]);
}
write_1602data(' ');
for(num=0;num<3;num++){
write_1602data(week[num]);
}
write_1602com(0x80+0x40);
for(num=0;num<8;num++){
write_1602data(time[num]);
}
//顯示溫度值
write_1602com(0x80+0x40+8);//設置數據指針
temperature=ds18b20_read_temp();
bai=temperature/1000+0x30;
shi=temperature%1000/100+0x30;
ge=temperature%100/10+0x30;
point=temperature%100%10+0x30;
if(temp_flag==1){//說明為正數不顯示符號位 125.6 25.7兩種
fuhao=0x20;//顯示空白
if(bai==0x30){
bai=0x20;//如果百位為0 不顯示
if(shi==0x30){
shi=0x20;//如果百位為0 十位也為0 都不顯示
}
}
write_1602data(fuhao);
write_1602data(bai);
write_1602data(shi);
}else{
fuhao=0x2d;//顯示負號 -2.5 -25.8兩種
write_1602data(0x20);//因為負數最低到55，所以不顯示百位
if(shi==0x30){
write_1602data(0x20);
write_1602data(fuhao);
}else{
write_1602data(fuhao);
write_1602data(shi);
}
}
write_1602data(ge);
write_1602data('.');
write_1602data(point);
write_1602data(0xdf);
write_1602data('C');
}
void display_alarm(uchar add,int dat){
//把設定的時分顯示出來
int x,y;
x=dat/10;
y=dat%10;
write_1602com(add);
write_1602data(int_to_char(x));
write_1602com(add+1);//防止寫后地址自動向后加一光標閃爍看不到
write_1602data(int_to_char(y));
write_1602com(add+1);
}
void init_alarm(){
//鬧鐘設置界面只有首次進入才執行
uchar code x[]="SET ALARM";
uchar i;
if(alarm==0){
write_1602com(0x01);//清屏
write_1602com(0x80+3);//設置數據指針
for(i=0;i<9;i++){
write_1602data(x[i]);
}
display_alarm(0x80+0x40+5,shi);//載入鬧鐘的時分
write_1602com(0x80+0x40+7);
write_1602data(':');
display_alarm(0x80+0x40+8,fen);
if(isOpen){//初始化的時候如果已經設定鬧鐘則顯示ON
write_1602com(0x80+0x40+13);
write_1602data(' ');
write_1602data('O');
write_1602data('N');
}else{
write_1602com(0x80+0x40+13);
write_1602data('O');
write_1602data('F');
write_1602data('F');
}
}
}
void key_scan(){
int i;
uchar code tips1[]="SET SUCCESS";//鬧鐘設置成功的提示
uchar code tips2[]="CANCEL SUCCESS";//取消鬧鐘的提示
if(key_set_time==0){//檢測是否按下
delay(10);//消抖
if(key_set_time==0){//再次檢測是否按下
while(!key_set_time);//檢測是否松開
delay(10);//延時消抖
while(!key_set_time);//再次檢測是否松開
if(alarm==0){//當沒有顯示鬧鐘界面時才顯示時間設定
count++;
write_ds1302(0x80,0x80);//讓時鐘停止
if(count==8){
//繼續走時，說明時間已經設定好了
write_1602com(0x0c);//讓光標消失
write_ds1302(0x80,0);//讓時鐘繼續
set_time(getTimebuf);//寫入新的時間
count=0;
return;
}
switch(count){
case 1:
write_1602com(0x80+0x40+7);//在秒的位置
break;
case 2:
write_1602com(0x80+0x40+4);//在分的位置
break;
case 3:
write_1602com(0x80+0x40+1);//在時的位置
break;
case 4:
write_1602com(0x80+14);//在星期的位置
break;
case 5:
write_1602com(0x80+10);//在日的位置
break;
case 6:
write_1602com(0x80+7);//在月的位置
break;
case 7:
write_1602com(0x80+4);//在年的位置
break;
}
write_1602com(0x0f);//讓光標閃爍
}
}
}
if(key_add==0){//檢測是否按下
delay(10);//消抖
if(key_add==0){//再次檢測是否按下
while(!key_add);//檢測是否松開
delay(10);//延時消抖
while(!key_add);//再次檢測是否松開
if(count!=0){
switch(count){
case 1:
//在秒的位置
getTimebuf[0]++;
if(getTimebuf[0]==0x5a){
getTimebuf[0]=0;
}
if(getTimebuf[0]==0x4a){
getTimebuf[0]=0x50;
}
if(getTimebuf[0]==0x3a){
getTimebuf[0]=0x40;
}
if(getTimebuf[0]==0x2a){
getTimebuf[0]=0x30;
}
if(getTimebuf[0]==0x1a){
getTimebuf[0]=0x20;
}
if(getTimebuf[0]==0x0a){
getTimebuf[0]=0x10;
}
time[6]=(getTimebuf[0])/16+48;//格式化時間秒
time[7]=(getTimebuf[0])%16+48;
write_1602com(0x80+0x40+6);//在秒的位置
write_1602data(time[6]);
write_1602com(0x80+0x40+7);//在秒的位置
write_1602data(time[7]);
write_1602com(0x80+0x40+7);//讓光標在秒的位置閃爍
break;
case 2:
//在分的位置
getTimebuf[1]++;
if(getTimebuf[1]==0x5a){
getTimebuf[1]=0;
}
if(getTimebuf[1]==0x4a){
getTimebuf[1]=0x50;
}
if(getTimebuf[1]==0x3a){
getTimebuf[1]=0x40;
}
if(getTimebuf[1]==0x2a){
getTimebuf[1]=0x30;
}
if(getTimebuf[1]==0x1a){
getTimebuf[1]=0x20;
}
if(getTimebuf[1]==0x0a){
getTimebuf[1]=0x10;
}
time[3]=(getTimebuf[1])/16+48;//格式化時間分
time[4]=(getTimebuf[1])%16+48;
write_1602com(0x80+0x40+3);//在分的位置
write_1602data(time[3]);
write_1602com(0x80+0x40+4);//在分的位置
write_1602data(time[4]);
write_1602com(0x80+0x40+4);//讓光標在分的位置閃爍
break;
case 3:
//在時的位置
getTimebuf[2]++;
if(getTimebuf[2]==0x24){
getTimebuf[2]=0;
}
if(getTimebuf[2]==0x1a){
getTimebuf[2]=0x20;
}
if(getTimebuf[2]==0x0a){
getTimebuf[2]=0x10;
}
time[0]=(getTimebuf[2])/16+48;//格式化時間小時
time[1]=(getTimebuf[2])%16+48;
write_1602com(0x80+0x40+0);//在小時的位置
write_1602data(time[0]);
write_1602com(0x80+0x40+1);
write_1602data(time[1]);
write_1602com(0x80+0x40+1);
break;
case 4:
//在星期的位置
getTimebuf[5]++;
if(getTimebuf[5]==0x08){
getTimebuf[5]=0x01;
}
if((getTimebuf[5]%10)*3==21){//輪完了重新開始
week[0]=weeklist[0];
week[1]=weeklist[1];
week[2]=weeklist[2];
}else{
week[0]=weeklist[(getTimebuf[5]%10)*3];//格式化星期
week[1]=weeklist[(getTimebuf[5]%10)*3+1];
week[2]=weeklist[(getTimebuf[5]%10)*3+2];
}
write_1602com(0x80+12);
write_1602data(week[0]);
write_1602com(0x80+13);
write_1602data(week[1]);
write_1602com(0x80+14);
write_1602data(week[2]);
write_1602com(0x80+14);
break;
case 5:
//在日的位置
getTimebuf[3]++;
if(getTimebuf[3]==0x32){
getTimebuf[3]=0x01;
}
if(getTimebuf[3]==0x2a){
getTimebuf[3]=0x30;
}
if(getTimebuf[3]==0x1a){
getTimebuf[3]=0x20;
}
if(getTimebuf[3]==0x0a){
getTimebuf[3]=0x10;
}
date[8]=(getTimebuf[3])/16+48;
date[9]=(getTimebuf[3])%16+48;
write_1602com(0x80+9);
write_1602data(date[8]);
write_1602com(0x80+10);
write_1602data(date[9]);
write_1602com(0x80+10);
break;
case 6:
//在月的位置
getTimebuf[4]++;
if(getTimebuf[4]==0x13){
getTimebuf[4]=0x01;
}
if(getTimebuf[4]==0x0a){
getTimebuf[4]=0x10;
}
date[5]=(getTimebuf[4])/16+48;
date[6]=(getTimebuf[4])%16+48;
write_1602com(0x80+6);
write_1602data(date[5]);
write_1602com(0x80+7);
write_1602data(date[6]);
write_1602com(0x80+7);
break;
case 7:
//在年的位置
getTimebuf[6]++;
if(getTimebuf[6]==0x9a){
getTimebuf[6]=0x00;
}
if(getTimebuf[6]==0x8a){
getTimebuf[6]=0x90;
}
if(getTimebuf[6]==0x7a){
getTimebuf[6]=0x80;
}
if(getTimebuf[6]==0x6a){
getTimebuf[6]=0x70;
}
if(getTimebuf[6]==0x5a){
getTimebuf[6]=0x60;
}
if(getTimebuf[6]==0x4a){
getTimebuf[6]=0x50;
}
if(getTimebuf[6]==0x3a){
getTimebuf[6]=0x40;
}
if(getTimebuf[6]==0x2a){
getTimebuf[6]=0x30;
}
if(getTimebuf[6]==0x1a){
getTimebuf[6]=0x20;
}
if(getTimebuf[6]==0x0a){
getTimebuf[6]=0x10;
}
date[2]=(getTimebuf[6])/16+48;
date[3]=(getTimebuf[6])%16+48;
write_1602com(0x80+3);
write_1602data(date[2]);
write_1602com(0x80+4);
write_1602data(date[3]);
write_1602com(0x80+4);
break;
}
}
if(alarm!=0){
switch(alarm){
case 1:
//調節鬧鐘的開與關
if(isOpen==0){
isOpen=1;
write_1602com(0x80+0x40+13);
write_1602data(' ');
write_1602data('O');
write_1602data('N');
}else{
isOpen=0;
write_1602com(0x80+0x40+13);
write_1602data('O');
write_1602data('F');
write_1602data('F');
}
//防止寫后地址自動向后加一光標閃爍看不到
write_1602com(0x80+0x40+15);
break;
case 2:
//調節鬧鐘的分
fen++;
if(fen==60){
fen=0;
}
display_alarm(0x80+0x40+8,fen);
break;
case 3:
//調節鬧鐘的小時
shi++;
if(shi==24){
shi=0;
}
display_alarm(0x80+0x40+5,shi);
break;
}
}
}
}
if(key_minus==0){//檢測是否按下
delay(10);//消抖
if(key_minus==0){//再次檢測是否按下
while(!key_minus);//檢測是否松開
delay(10);//延時消抖
while(!key_minus);//再次檢測是否松開
if(count!=0){
switch(count){
case 1:
//在秒的位置
getTimebuf[0]--;
if(getTimebuf[0]==0xff){
getTimebuf[0]=0x59;
}
if(getTimebuf[0]==0x4f){
getTimebuf[0]=0x49;
}
if(getTimebuf[0]==0x3f){
getTimebuf[0]=0x39;
}
if(getTimebuf[0]==0x2f){
getTimebuf[0]=0x29;
}
if(getTimebuf[0]==0x1f){
getTimebuf[0]=0x19;
}
if(getTimebuf[0]==0x0f){
getTimebuf[0]=0x09;
}
time[6]=(getTimebuf[0])/16+48;//格式化時間秒
time[7]=(getTimebuf[0])%16+48;
write_1602com(0x80+0x40+6);//在秒的位置
write_1602data(time[6]);
write_1602com(0x80+0x40+7);//在秒的位置
write_1602data(time[7]);
write_1602com(0x80+0x40+7);//讓光標在秒的位置閃爍
break;
case 2:
//在分的位置
getTimebuf[1]--;
if(getTimebuf[1]==0xff){
getTimebuf[1]=0x59;
}
if(getTimebuf[1]==0x4f){
getTimebuf[1]=0x49;
}
if(getTimebuf[1]==0x3f){
getTimebuf[1]=0x39;
}
if(getTimebuf[1]==0x2f){
getTimebuf[1]=0x29;
}
if(getTimebuf[1]==0x1f){
getTimebuf[1]=0x19;
}
if(getTimebuf[1]==0x0f){
getTimebuf[1]=0x09;
}
time[3]=(getTimebuf[1])/16+48;//格式化時間分
time[4]=(getTimebuf[1])%16+48;
write_1602com(0x80+0x40+3);//在分的位置
write_1602data(time[3]);
write_1602com(0x80+0x40+4);//在分的位置
write_1602data(time[4]);
write_1602com(0x80+0x40+4);//讓光標在分的位置閃爍
break;
case 3:
//在時的位置
getTimebuf[2]--;
if(getTimebuf[2]==0xff){
getTimebuf[2]=0x23;
}
if(getTimebuf[2]==0x1f){
getTimebuf[2]=0x19;
}
if(getTimebuf[2]==0x0f){
getTimebuf[2]=0x09;
}
time[0]=(getTimebuf[2])/16+48;//格式化時間小時
time[1]=(getTimebuf[2])%16+48;
write_1602com(0x80+0x40+0);//在小時的位置
write_1602data(time[0]);
write_1602com(0x80+0x40+1);
write_1602data(time[1]);
write_1602com(0x80+0x40+1);
break;
case 4:
//在星期的位置
getTimebuf[5]--;
if(getTimebuf[5]==0){
getTimebuf[5]=0x07;
}
if((getTimebuf[5]%10)*3==21){//輪完了重新開始
week[0]=weeklist[0];
week[1]=weeklist[1];
week[2]=weeklist[2];
}else{
week[0]=weeklist[(getTimebuf[5]%10)*3];//格式化星期
week[1]=weeklist[(getTimebuf[5]%10)*3+1];
week[2]=weeklist[(getTimebuf[5]%10)*3+2];
}
write_1602com(0x80+12);
write_1602data(week[0]);
write_1602com(0x80+13);
write_1602data(week[1]);
write_1602com(0x80+14);
write_1602data(week[2]);
write_1602com(0x80+14);
break;
case 5:
//在日的位置
getTimebuf[3]--;
if(getTimebuf[3]==0){
getTimebuf[3]=0x31;
}
if(getTimebuf[3]==0x2f){
getTimebuf[3]=0x29;
}
if(getTimebuf[3]==0x1f){
getTimebuf[3]=0x19;
}
if(getTimebuf[3]==0x0f){
getTimebuf[3]=0x09;
}
date[8]=(getTimebuf[3])/16+48;
date[9]=(getTimebuf[3])%16+48;
write_1602com(0x80+9);
write_1602data(date[8]);
write_1602com(0x80+10);
write_1602data(date[9]);
write_1602com(0x80+10);
break;
case 6:
//在月的位置
getTimebuf[4]--;
if(getTimebuf[4]==0){
getTimebuf[4]=0x12;
}
if(getTimebuf[4]==0x0f){
getTimebuf[4]=0x09;
}
date[5]=(getTimebuf[4])/16+48;
date[6]=(getTimebuf[4])%16+48;
write_1602com(0x80+6);
write_1602data(date[5]);
write_1602com(0x80+7);
write_1602data(date[6]);
write_1602com(0x80+7);
break;
case 7:
//在年的位置
getTimebuf[6]--;
if(getTimebuf[6]==0xff){
getTimebuf[6]=0x99;
}
if(getTimebuf[6]==0x8f){
getTimebuf[6]=0x89;
}
if(getTimebuf[6]==0x7f){
getTimebuf[6]=0x79;
}
if(getTimebuf[6]==0x6f){
getTimebuf[6]=0x69;
}
if(getTimebuf[6]==0x5f){
getTimebuf[6]=0x59;
}
if(getTimebuf[6]==0x4f){
getTimebuf[6]=0x49;
}
if(getTimebuf[6]==0x3f){
getTimebuf[6]=0x39;
}
if(getTimebuf[6]==0x2f){
getTimebuf[6]=0x29;
}
if(getTimebuf[6]==0x1f){
getTimebuf[6]=0x19;
}
if(getTimebuf[6]==0x0f){
getTimebuf[6]=0x09;
}
date[2]=(getTimebuf[6])/16+48;
date[3]=(getTimebuf[6])%16+48;
write_1602com(0x80+3);
write_1602data(date[2]);
write_1602com(0x80+4);
write_1602data(date[3]);
write_1602com(0x80+4);
break;
}
}
if(alarm!=0){
switch(alarm){
case 1:
//調節鬧鐘的開與關
if(isOpen==0){
isOpen=1;
write_1602com(0x80+0x40+13);
write_1602data(' ');
write_1602data('O');
write_1602data('N');
}else{
isOpen=0;
write_1602com(0x80+0x40+13);
write_1602data('O');
write_1602data('F');
write_1602data('F');
}
//防止寫后地址自動向后加一光標閃爍看不到
write_1602com(0x80+0x40+15);
break;
case 2:
//調節鬧鐘的分
fen--;
if(fen<0){
fen=59;
}
display_alarm(0x80+0x40+8,fen);
break;
case 3:
//調節鬧鐘的小時
shi--;
if(shi<0){
shi=23;
}
display_alarm(0x80+0x40+5,shi);
break;
}
}
}
}
if(key_set_alarm==0){//檢測是否按下
delay(10);//消抖
if(key_set_alarm==0){//再次檢測是否按下
while(!key_set_alarm);//檢測是否松開
delay(10);//延時消抖
while(!key_set_alarm);//再次檢測是否松開
if(count==0){//時間在正常走動的時候才能設置鬧鐘
init_alarm();
alarm++;//說明進入鬧鐘設置界面
if(alarm==4){
alarm=0;//說明鬧鐘設置完畢
write_1602com(0x01);//清屏以便顯示時間
write_1602com(0x0c);//關閉光標
//顯示設置成功或取消的提示
if(isOpen){
write_1602com(0x80+2);
for(i=0;i<11;i++){
write_1602data(tips1[i]);
}
}else{
write_1602com(0x80+1);
for(i=0;i<14;i++){
write_1602data(tips2[i]);
}
}
//延時2ms后清屏顯示時間
delay(2000);
write_1602com(0x01);
}else{
switch(alarm){
case 1:
write_1602com(0x80+0x40+15);
break;
case 2:
write_1602com(0x80+0x40+9);
break;
case 3:
write_1602com(0x80+0x40+6);
break;
}
write_1602com(0x0f);
}
}
}
}
}
void beep(){
//檢測鬧鐘并且報警
if(time[0]==int_to_char(shi/10)&&time[1]==int_to_char(shi%10)&&time[3]==int_to_char(fen/10)&&time[4]==int_to_char(fen%10)){
isRing=1;//鬧鐘響起，此時如果進入鬧鐘設置界面改變時分，鬧鐘就關閉了
bee=0;
delay(250);
bee=1;
delay(250);
}else{
isRing=0;//關閉鬧鐘或者一分鐘后鬧鐘自動關閉
bee=1;
}
}
void delay1(int i){
while(i--);
}
void ds18b20_init(){
uchar x=0;
dq = 1; //DQ復位
delay1(8); //稍做延時
dq = 0; //單片機將DQ拉低
delay1(80); //精確延時大于 480us
dq = 1; //拉高總線
delay1(14);
x=dq; //稍做延時后如果x=0則初始化成功 x=1則初始化失敗
delay1(20);
}
uchar ds18b20_read(){
//讀一個字節
uchar i=0;
uchar dat = 0;
for (i=8;i>0;i--)
{
dq = 0; // 給脈沖信號
dat>>=1;
dq = 1; // 給脈沖信號
if(dq)
dat|=0x80;
delay1(4);
}
return(dat);
}
void ds18b20_write(char dat){
//寫一個字節
uchar i=0;
for (i=8; i>0; i--)
{
dq = 0;
dq = dat&0x01;
delay1(5);
dq = 1;
dat>>=1;
}
}
int ds18b20_read_temp(){
//讀取溫度
uchar low;
uchar high;
unsigned long tmp;
float value;
int t;//溫度
ds18b20_init();
ds18b20_write(0xCC); //跳過讀序列號的操作
ds18b20_write(0x44); //啟動溫度轉換
ds18b20_init();
ds18b20_write(0xCC); //跳過讀序列號的操作
ds18b20_write(0xBE); //讀取溫度寄存器共九個前兩個代表溫度
low=ds18b20_read();//低八位數據
high=ds18b20_read();//高八位數據
tmp=high;
tmp<<=8;
tmp=tmp|low;
//此處有正負之分
if(tmp>=63488){//ffff f000 0000 0000-->(f800)
temp_flag=0;
//8位全為1時，加1才進位
if((~low)==0xff){//判斷low取反加1之后是否進位
high=(~high)+1;
low=0;
}else{
high=~high;
low=(~low)+1;
}
tmp=high*256+low;
}else{
temp_flag=1;
}
value=tmp*0.0625;
t=value*10+((temp_flag==1)?+0.5:-0.5);//放大十倍輸出并四舍五入
return t;
}
void main(){
init_1602();
init_ds1302();
while(1){
if(isOpen){//只有開啟鬧鐘的時候才檢測
beep();//不斷檢測鬧鐘
}
key_scan();
if(count==0&&alarm==0){//沒有設定時間也沒有在鬧鐘界面的時候時間才顯示
display();
}
}
}

復制代碼

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