C51 program for adjustable time alarm clock

/*
Program effect: clock, including adjustable time, alarm rings when time is up, buzzer, this program has been debugged You can download the code of this program
from http://www.51hei.com/ziliao/file/naozhong.rar . The speaker is connected to p2.0. The port can be changed by yourself. */ #include //Header file #include #define uchar unsigned char //Macro definition #define uint unsigned int sbit key1=P3^5; //Bit declaration sbit key2=P3^6; sbit key3=P3^7; sbit fmq=P2^0; uchar code table[]={0x3f,0x06,0x5b, //Number displayed by digital tube 0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77, 0xbf,0x86,0xdb,//values ​​with decimal points 0xcf,0xe6,0xed,0xfd,0x87,0xff,0xef}; void jia(); //function declaration void jian(); uchar table_1[6]; //define an array containing 6 values ​​uchar table_2[6]; uchar shi=23,fen=59,miao=50; //display initial value uchar shi1,fen1,miao1,shi2,fen2,miao2,shi3,fen3,miao3;//define global variables uchar flag,flag1,cnt,count;//define global variables void delay(uchar i) //delay function for dynamic scanning of digital tubes { uchar x,y; for(x=i;x>0;x--) for(y=110;y>0;y--); } void init() //initialization function { TMOD=0X01; //Working mode 1 TH0=(65536-50000)/256; //Timing time: 50ms TL0=(65536-50000)%256; ET0=1; //Open timer EA=1; //Open total interrupt TR0=1; //Start timer } void display() //Display sub-function, used to display time value { uchar i,j; table_1[0]=miao%10; //Separate the seconds and tens digitstable_1[1]=miao/10; table_1[2]=fen%10+11; //Separate the minutes and tens digitstable_1[3]=fen/10; table_1[4]=shi%10+11; //Separate the hours and tens digitstable_1[5]=shi/10; j=0x7f; //Scan from seconds to hoursfor (i=0;i<6;i++) { P2=j; P0=table[table_1[i]];//display value delay(10); j=_cror_(j,1);//circular right shift } } void display_1() //display sub-function, used to display timing time { uchar i,j; table_2[0]=miao2%10; //the following meanings are the same as abovetable_2[1]=miao2/10; table_2[2]=fen2%10+11; table_2[3]=fen2/10; table_2[4]=shi2%10+11; table_2[5]=shi2/10; j=0x7f; for(i=0;i<6;i++) { P2=j; P0=table[table_2[i]]; delay(10); j=_cror_(j,1); } } void shijian() //time sub-function { if(flag>=20) //judge whether it is one second { flag=0; //When it reaches 60s, the flag is cleared miao++; //Increase the seconds by 1 if(miao>=60) //Judge whether the seconds have reached 60s {
















































































miao=0;//When reached, clear
fen++; //add 1
if(fen>=59) //The following meanings are the same as above
{
fen=0;
shi++;
if(shi>23)
shi=0;
}
}
}
}
void key_scan() //Keyboard scanning subfunction
{
uchar i; //Define local variablesif
(key1==0)
{
while(!key1) //Prevent display loss
{
if(cnt==0||cnt==1||cnt==2||cnt==3||cnt==4||cnt==8)
{
display();
}
if(cnt==5||cnt==6||cnt==7)
{
display_1();
}
}
cnt++; //Record the number of times key1 is pressedif
(cnt==1) //First press, stop countingTR0
=0;
if(cnt==2) //Second press
{
miao1=miao; //Save the value of seconds
miao=99; //Display 99, indicating that the value of seconds can be adjusted
for(i=0;i<100;i++)
display(); //Display 99
miao=miao1; //Restore the value of seconds from the previous moment
}
if(cnt==3) //The following meanings are the same as above
{
fen1=fen;
fen=99;
for(i=0;i<100;i++)
display();
fen=fen1;
}
if(cnt==4)
{
shi1=shi;
shi=99;
for(i=0;i<100;i++)
display();
shi=shi1;
}
if(cnt==5)
{
miao1=miao2;
miao2=88;
for(i=0;i<100;i++)
display_1();
miao2=miao1;
}
if(cnt==6)
{
fen1=fen2;
fen2=88;
for(i=0;i<100;i++)
display_1();
fen2=fen1;
}
if(cnt==7)
{
shi1=shi2;
shi2=88;
for(i=0;i<100;i++)
display_1();
shi2=shi1;
}
if(cnt==8) //Eighth press
{
TR0=1; //Start counting
cnt=0; //Reset the number of presses
}
}
if(key2==0) //Judge whether key2 is pressed
{
while(!key2) //Prevent display from dropping
{
if(cnt==0||cnt==1||cnt==2||cnt==3||cnt==4||cnt==8)
{
display();
}
if(cnt==5||cnt==6||cnt==7)
{
display_1();
}
}
jia();//Call the sub-function of adding 1
}
if(key3==0) //Judge whether key3 is pressed
{
while(!key3) //Prevent display from dropping
{
if(cnt==0||cnt==1||cnt==2||cnt==3||cnt==4||cnt==8)
{
display();
}
if(cnt==5||cnt==6||cnt==7)
{
display_1();
}
}
jian(); //Call the subtraction subfunction
}
}[page]
void jia() //addition subfunction
{
if(cnt==2) //Judge whether the number of times key1 is pressed is 2
{
miao++; //If yes, add 1 to the second
if(miao>59) //Judge whether the second is greater than 59, if yes, clear the second
miao=0;
}
if(cnt==3) //The following meaning is the same as above
{
fen++;
if(fen>59)
fen=0;
}
if(cnt==4)
{
shi++;
if(shi>23)
shi=0;
}
if(cnt==5)
{
miao2++;
if(miao2>59)
miao2=0;
}
if(cnt==6)
{
fen2++;
if(fen2>59)
fen2=0;
}
if(cnt==7)
{
shi2++;
if(shi2>23)
shi2=0;
}
}
void jian() //Subtract 1 subfunction
{
if(cnt==2) //Judge whether the number of times key1 is pressed is 2, if so, subtract 1 from the second
{
miao--;
if(miao==255) //Judge whether the second is reduced to 255, if so, clear the second
miao=59;
}
if(cnt==3)
{
fen--;
if(fen==255)
fen=59;
}
if(cnt==4)
{
shi--;
if(shi==255)
shi=23;
}
if(cnt==5)
{
miao2--;
if(miao2==255)
miao2=59;
}
if(cnt==6)
{
fen2--;
if(fen2==255)
fen2=59;
}
if(cnt==7)
{
shi2--;
if(shi2==255)
shi2=23;
}
}
void clock() //Alarm sub-function
{
if(miao2==miao) //Display whether the values ​​of seconds are equalif
(fen2==fen) //Yes, then judge whether the minutes are equalif
(shi2==shi) //Yes, then judge whether they are equal
{
flag1=0; //Yes, then clear the flag1while
(!(flag1==100)) //Judge whether flag1 reaches 100
{
fmq=0; //No, then continue to drive the buzzer to sound, the time is about: 5s
shijian(); //Call the time sub-function
display(); //Call the display sub-function
}
fmq=1;//Turn off the buzzer
}
}
void main()
{
init();//Call the initialization sub-functionwhile
(1)
{
key_scan(); //Call the keyboard scan sub-function
shijian(); //Time sub-function
clock(); //Alarm sub-function
//Display sub-function
if(cnt==0||cnt==1||cnt==2||cnt==3||cnt==4||cnt==8)
{
display();
}
if(cnt==5||cnt==6||cnt==7)
{
display_1();
}
}
}
void time0() interrupt 1 //Timer 0
{
TH0=(65536-50000)/256; //Initial value 50ms
TL0=(65536-50000)%256;
flag++; //Flag
flag1++;
}