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#include "atmelat89x51.h"
#include "intrins.h"
unsigned char hour,min,sec,year,month,day,weekday; //當前時間、日期、星期
unsigned int count_down; //1秒鐘計時用
bit led_on; //數(shù)碼管是否點亮的標志
unsigned char display[8]; //8位數(shù)碼管要顯示的數(shù)據(jù)
unsigned char attr; //八個數(shù)碼管的閃爍控制字節(jié)，當為0時，對應數(shù)碼管閃
bit flash; //LED 閃爍開關，與attr共同決定數(shù)碼管是否閃爍
unsigned char show_status; //LED 顯示狀態(tài)標志
// 0：設置鬧鐘數(shù)據(jù)
// 1：顯示當前日期及星期
// 2：顯示當前時間
// 3：設置當前日期
// 4：設置當前時間
bit km; //按鍵已去抖動標志
bit kp; //按鍵已處理標志
bit sound; //蜂鳴器響標志
bit alarm_stop; //蜂鳴器響后用戶手工按停標志
struct { unsigned char h; //小時
unsigned char m; //分鐘
} alarm[8]; //8個鬧鐘項
unsigned char alarm_en; //鬧鐘項啟用標志
unsigned char alarm_wk; //鬧鐘項周末啟用標志
unsigned char cur_alarm_set; //當前設置的鬧鐘項
unsigned char cur_alarm_active; //當前到點的鬧鐘項
bit new_alarm_info; //鬧鐘項內(nèi)容已修改標志
sbit sound_output = P1^5; //蜂鳴器驅(qū)動端口，輸出0時蜂鳴器響
sbit SDA_PIN = P1^6; //EEPROM數(shù)據(jù)線端口
sbit SCL_PIN = P1^7; //EEPROM時鐘線端口
void I2cDelay() //EEPROM操作時需要的延時函數(shù)
{ _nop_(); _nop_(); _nop_();
_nop_(); _nop_(); _nop_();
}
void DelayX1ms(unsigned char count) //延遲函數(shù)，參數(shù)為毫秒數(shù)
{unsigned char i,j;
for(i=0;i<count;i++)
for(j=0;j<240;j++) ;
}
void Start() //I2C啟動，24C08使用I2C方式
{ SDA_PIN=1; I2cDelay();
SCL_PIN=1; I2cDelay();
SDA_PIN=0; I2cDelay();
SCL_PIN=0;
}
void Stop() //I2C停止
{ I2cDelay(); SDA_PIN=0;
I2cDelay(); SCL_PIN=1;
I2cDelay(); SDA_PIN=1;
I2cDelay();
}
bit SendByte(unsigned char value) //發(fā)送1字節(jié)數(shù)據(jù)給EEPROM
{unsigned char i;
bit no_ack=0;
for(i=0;i<8;i++) //發(fā)送8位數(shù)據(jù)
{ I2cDelay();
if(value&0x80) SDA_PIN=1;
else SDA_PIN=0;
value=value<<1;
I2cDelay(); SCL_PIN=1;
I2cDelay();
I2cDelay(); SCL_PIN=0;
}
I2cDelay(); SDA_PIN=1; //確認脈沖周期，等待EEPROM的確認
I2cDelay(); SCL_PIN=1;
I2cDelay();
if(SDA_PIN==1) no_ack=1;
I2cDelay(); SCL_PIN=0;
return no_ack;
}
void mywrite(unsigned char address,unsigned char value) //向EEPROM寫1字節(jié)
{ Start(); SendByte(0xa0); SendByte(address);
SendByte(value); Stop(); DelayX1ms(10);
}
unsigned char ReadByte() //從EEPROM接收1字節(jié)
{unsigned char i,bval;
bval=0;
for(i=0;i<8;i++) //接收8位數(shù)據(jù)
{ I2cDelay();
SDA_PIN=1; //從P1輸入數(shù)據(jù)時，先往P1輸入“1”
I2cDelay(); SCL_PIN=1;
I2cDelay(); bval=bval<<1; if(SDA_PIN) bval=bval|0x01;
I2cDelay(); SCL_PIN=0;
}
I2cDelay(); SDA_PIN=1; //確認脈沖周期，不送出確認
I2cDelay(); SCL_PIN=1;
I2cDelay();
I2cDelay();
return(bval);
}
unsigned char myread(unsigned char address) //從EEPROM讀入1字節(jié)數(shù)據(jù)
{unsigned char tmp;
Start(); SendByte(0xa0); SendByte(address);
Start(); SendByte(0xa1); tmp=ReadByte();
Stop(); DelayX1ms(2);
return(tmp);
}
void Timer0ISR(void) interrupt 1 using 3 //定時器0中斷程序，用于走時，1/8000秒一次
{unsigned char tmp,tmp_days;
count_down--;
if(count_down==1 || count_down==2001 || count_down==4001 || count_down==6001)
{ flash=~flash; //數(shù)碼管閃爍的開關量
if(sound && flash) sound_output=0; //驅(qū)動蜂鳴器
else sound_output=1; //關閉蜂鳴器
return;
}
/*** 計算當前日期為星期幾***/
if(count_down==3000)
{ if(year==0) weekday=5; //2000年1月1日為星期六
else { tmp=(year-1)/4+1; tmp=(year-tmp)+tmp*2;
weekday=(tmp+5)%7; //計算出當前年的1月1日為星期幾
}
tmp_days=0;
for(tmp=1;tmp<month;tmp++)
if(tmp==1 || tmp==3 || tmp==5 || tmp==7 || tmp==8 || tmp==10)
tmp_days=tmp_days+31;
else if(tmp==4 || tmp==6 || tmp==9 || tmp==11)
tmp_days=tmp_days+30;
else if(tmp==2)
{ if(year%4==0) tmp_days=tmp_days+29;
else tmp_days=tmp_days+28;
}
tmp_days=tmp_days+day-1; weekday=(weekday+tmp_days%7)%7+1;
return;
}
/*** 查詢是否有鬧鐘時間項符合觸發(fā)條件 ***/
if(count_down==5000)
{ if((alarm_stop || sound) && alarm[cur_alarm_active].m!=min) //觸發(fā)后1分鐘
{ alarm_stop=0; sound=0; } //自動關蜂鳴器
if(sound==0 && alarm_stop==0) //沒有已觸發(fā)的鬧鐘項
for(tmp=0;tmp<8;tmp++) //則查詢8個鬧鐘項內(nèi)是否有符合條件的
{ if(((alarm_en>>tmp)&1)==0) continue; //該鬧鐘項不啟用
if(((alarm_wk>>tmp)&1)==1) //該鬧鐘項周末有效
{ if(weekday!=6 && weekday!=7) continue; } //當前不是星期六或星期天
else
{ if(weekday==6 || weekday==7) continue; }
if(alarm[tmp].h==hour && alarm[tmp].m==min) //比較當前時間與該
{ sound=1; cur_alarm_active=tmp; break; } //鬧鐘項的時間
}
return;
}
if(count_down==0) //過了一秒鐘
{ count_down=8000;
sec++;
if(sec==60)
{ sec=0;
min++;
if(min==60)
{ min=0;
hour++;
if(hour==24)
{ hour=0; day++;
switch(day)
{ case 29: if(month==2 && year%4) { day=1; month=3; }
break;
case 30: if(month==2 && year%4==0) { day=1; month=3; }
break;
case 31: if(month==4 || month==6 || month==9 || month==11)
{ day=1; month++; }
break;
case 32: day=1; month++;
if(month==13) { month=1; year++; }
}
}
}
}
}
}
void Timer1ISR(void) interrupt 3 using 2 //定時器2中斷，用于按鍵掃描
{unsigned char keytmp;
char tmp;
TH1=0x15; TL1=0xa0; // 每30ms中斷一次
/*** 當前顯示的內(nèi)容 ***/
if(show_status==0) //當前正在設置鬧鐘項
{ display[0]=cur_alarm_set; display[1]=0xf;
display[2]=alarm[cur_alarm_set].h/10; display[3]=alarm[cur_alarm_set].h%10;
display[4]=alarm[cur_alarm_set].m/10; display[5]=alarm[cur_alarm_set].m%10;
display[6]=(alarm_wk>>cur_alarm_set)&1; display[7]=(alarm_en>>cur_alarm_set)&1;
}
if(show_status==1 || show_status==3) //當前顯示或設置日期
{ display[0]=year/10; display[1]=year%10; display[2]=month/10;
display[3]=month%10; display[4]=day/10; display[5]=day%10;
display[6]=0xf; display[7]=weekday;
}
if(show_status==2 || show_status==4) //當前顯示或設置時間
{ display[0]=hour/10; display[1]=hour%10; display[2]=min/10;
display[3]=min%10; display[4]=sec/10; display[5]=sec%10;
display[6]=0xf; display[7]=0xf; //最后兩后無顯示
}
/*** 按鍵掃描及處理 ***/
keytmp=~(P1) & 0x0f;
if(keytmp==0) { km=0; kp=0; }
else
{ if(km==0) km=1;
else
{ if(kp==0)
{ kp=1;
if(keytmp==1) //第一個按鈕
{ if(sound) { alarm_stop=1; sound=0; } //如果鬧鐘正響，按此鍵停止
else if((show_status==1 || show_status==2) && led_on) //正顯示日期或時間
{ show_status=0; cur_alarm_set=0; attr=0x3f; } //進入鬧鐘設置
else if(show_status==0) //如正在設置鬧鐘時間項
{ show_status=2; new_alarm_info=1; attr=0xff; } //返回當前時間顯示
return;
}
if(keytmp==2 && led_on) //第二個按鈕，僅當數(shù)碼管打開時有效
{ switch(attr)
{ case 0xff: if(show_status==1) show_status=2; //在顯示時間與日期間切換
else if(show_status==2) show_status=1;
break;
case 0x3f: if(show_status==0) cur_alarm_set=(cur_alarm_set+1)%8;
else if(show_status==3)
year=(year+1)%50; //當前日期的“年”加1
else if(show_status==4)
hour=(hour+1)%24; //當前時間的“時”加1
break;
case 0xcf: if(show_status==0) //鬧鐘設置的“時”加1
alarm[cur_alarm_set].h=(alarm[cur_alarm_set].h+1)%24;
else if(show_status==3)
{ month++; //當前日期的“月”加1
if(month==13) month=1; }
else if(show_status==4)
min=(min+1)%60; //當前時間的“分”加1
break;
case 0xf3: if(show_status==0)
alarm[cur_alarm_set].m=(alarm[cur_alarm_set].m+1)%60;
else if(show_status==3)
{day++; //當前日期的“日”加1
if(day==32) day=1; }
else if(show_status==4)
{count_down=8000;
sec=(sec+1)%60; } //當前時間的“秒”加1
break;
case 0xfd: if(show_status==0)
alarm_wk^=0x1<<cur_alarm_set; 周末標志位切換
break;
case 0xfe: if(show_status==0)
alarm_en^=0x1<<cur_alarm_set; 啟用標志位切換
} //end of switch(attr)
return;
} //end of if(keytmp==1)
if(keytmp==4) //第三個按鈕
{ switch(attr)
{ case 0xff: if(show_status==1 || show_status==2)
led_on=~led_on; //打開或關閉數(shù)碼管顯示
break;
case 0x3f: if(show_status==0) //如果正在設置鬧鐘
{ if(cur_alarm_set==0) cur_alarm_set=7;
else cur_alarm_set--;}
else if(show_status==3) //當前日期的“年”減1
{ if(year==0) year=49; else year--; }
else if(show_status==4) //當前時間的“時”減1
{ tmp=hour-1; if(tmp<0) hour=23; else hour=tmp; }
break;
case 0xcf: if(show_status==0) //鬧鐘設置的“時”減1
{ tmp=alarm[cur_alarm_set].h-1;
if(tmp<0) alarm[cur_alarm_set].h=23;
else alarm[cur_alarm_set].h=tmp;
}
else if(show_status==3)
{ month--; //當前日期的“月”減1
if(month==0) month=12; }
else if(show_status==4)
{ tmp=min-1; //當前時間的“分”減1
if(tmp<0) min=59; else min=tmp; }
break;
case 0xf3: if(show_status==0) //鬧鐘設置的“分鐘”減1
{ tmp=alarm[cur_alarm_set].m-1;
if(tmp<0) alarm[cur_alarm_set].m=59;
else alarm[cur_alarm_set].m=tmp;
}
else if(show_status==3)
{ day--; //當前日期的“日”減1
if(day==0) day=31; }
else if(show_status==4)
{ tmp=sec-1; //當前時間的“秒”減1
count_down=8000;
if(tmp<0) sec=59; else sec=tmp; }
break;
case 0xfd: if(show_status==0) //切換周末標志
alarm_wk^=0x1<<cur_alarm_set;
break;
case 0xfe: if(show_status==0) //切換啟用標志
alarm_en^=0x1<<cur_alarm_set;
} //end of switch(attr)
return;
} //end of if(keytmp==2)
if(keytmp==8 & led_on) //第四個按鈕，僅當數(shù)碼管打開時有效
{ switch(attr)
{ case 0xff: if(show_status==1) //如果當前顯示日期
show_status=3; //切換到調(diào)準日期狀態(tài)
else if(show_status==2) //如果當前顯示時間
show_status=4; //切換到調(diào)準時間狀態(tài)
attr=0x3f; break; //第一、二個數(shù)碼管閃爍
case 0x3f: attr=0xcf; break; //第三、四個數(shù)碼管閃爍
case 0xcf: attr=0xf3; break; //第五、六個數(shù)碼管閃爍
case 0xf3: if(show_status==0) attr=0xfd; //第七個數(shù)碼管閃爍
else if(show_status==3)
{ show_status=1; attr=0xff; } //恢復正常顯示日期
else if(show_status==4)
{ show_status=2; attr=0xff; } //恢復正常顯示時間
break;
case 0xfd: if(show_status==0) attr=0xfe; //第八個數(shù)碼管閃爍
break;
case 0xfe: if(show_status==0) attr=0x3f; //第一、二個數(shù)碼管閃爍
}
} // end of if(keytmp==4)
} // end of if(kp==0)
} // end of if(km==0)
} // end of if(keytmp!=0)
}
main()
{unsigned char i;
hour=23; min=58; sec=30; year=2; month=4; day=25;
count_down=8000;
flash=0; attr=0xff; led_on=1;
km=0; kp=0; show_status=2; //加電后顯示當前時間
new_alarm_info=0; sound=0; alarm_stop=0;
for(i=0;i<8;i++) //從EEPROM中讀入8個鬧鐘設置
{ alarm[i].h=myread(i*2); alarm[i].m=myread(i*2+1); }
alarm_en=myread(i*2); alarm_wk=myread(i*2+1);
IE=0; IP=0; //disable all interrupt and lower priority
TMOD=0x12; //timer 0 is set to mode 2,auto_reloading,timer1,mode 1
TH0=6; TL0=6; //timer0 parameters for 0.125ms
TH1=0x15; TL1=0xa0; //timer1 parameters for 30ms
TR0=1; TR1=1; //timer0 interrupt most important
ET0=1; ET1=1; EA=1; //enable interrupt function
while(1)
{ if(led_on)
for(i=0;i<8;i++)
{ P2=0;
if(flash || attr&(0x80>>i))
{ P0=display[i]; P2=0x80>>i; DelayX1ms(1); }
}
else P2=0;
if(new_alarm_info)
{ P2=0; //暫時關閉數(shù)碼管
new_alarm_info=0; //寫入EEPROM
for(i=0;i<8;i++) { mywrite(i*2,alarm[i].h); mywrite(i*2+1,alarm[i].m); }
mywrite(i*2,alarm_en); mywrite(i*2+1,alarm_wk);
}
}
}

復制代碼

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