Single chip microcomputer drives DS1302 time DS18B20 temperature 12864 LCD display complete program design

Program description: This is a complete program design example using 51 single-chip microcomputer to drive DS1302 time module + DS18B20 temperature sensor module + 12864 LCD display. There are four keyboards KEY0 to KEY3. Key0 is used to modify the time. First, it is from second to minute to hour to year to month to day to week. Key1 is to add 1 and key2 is to subtract 1. When in the time modification state, press key3 again to exit and modify the time and date. In the normal state, press key3 and then key2 to turn on the LCD light. Pressing key3 alone will turn off the light.

File 1: DS1302 driver.c

#include

//ds1302
sbit sclk=P0^3;
sbit io=P0^4;
sbit rst=P0^5;
sbit acc0=ACC^0;
sbit acc1=ACC^1;
sbit acc2=ACC^2;
sbit acc3=ACC^ 3;
sbit acc4=ACC^4;
sbit acc5=ACC^5;
sbit acc6=ACC^6;
sbit acc7=ACC^7;

delay()
{
unsigned char i;
i=10;
i=
10;
i=10;
i=10;
i=10;
i=10;}
w_1302(unsigned char dat,unsigned char shu){//write an eight-bit number to DS1302 //rising efficiency ;;;select the write address and then write the data

ACC=dat;//address
sclk=0;
rst=1;//
io=acc0;///
sclk=0;
delay();
sclk=1;
io=acc1;
sclk=0;
delay();
sclk= 1;
io=acc2;
sclk=0;
delay(); sclk
=1
; io=acc3; sclk
=0;
delay();
sclk=1;
io=acc4;
sclk=0;
delay();
sclk=1;
io=acc5;
sclk=0;
delay(); sclk
=1;
io=acc6; sclk
=0;
delay(); sclk
=1;
io=acc7;
sclk=0;
delay();
sclk=1;// /

//sclk=0;
ACC=shu; //data
io=acc0;///
sclk=0;
delay(); sclk
=1
; io=acc1;
sclk=0;
delay();
sclk=1;
io= acc2;
sclk=0;
delay();
sclk=1;
io=acc3; sclk
=0;
delay()
; sclk=1;
io=acc4; sclk
=0
; delay();
sclk=1;
io=acc5;
sclk=0;
delay();
sclk=1;
io=acc6; sclk
=0;
delay()
; sclk=1;
io=acc7;
sclk=0;
delay();
sclk=1;///

rst=0 ;
sclk=0;
} ///Complete writing
unsigned char r_1302(unsigned char ADD){

sclk=0;
rst=1;
ACC=ADD; //Address
io=acc0;///
sclk=0;
delay();
sclk=1;
io=acc1; sclk
=0;
delay();
sclk=1;
io=acc2;
sclk=0;
delay();
sclk=1;
io=acc3;
sclk=0;
delay();
sclk=1;
io=acc4; sclk
=0;
delay(); sclk=1 ; io=acc5; sclk=0; delay(); sclk= 1; io=acc6; sclk=0; delay(); sclk =1; io=acc7; sclk =0;///// delay(); sclk=1; delay(); sclk=0; acc0=io ; delay(); sclk=1; delay (); sclk=0 ; acc1 =io; delay(); sclk=1; delay(); sclk=0; acc2=io; delay(); sclk=1; delay(); sclk=0; acc3=io; delay() ; sclk =1; delay(); sclk=0; acc4=io; delay(); sclk=1; delay(); sclk= 0; acc5=io; delay(); sclk=1; delay (); sclk =0; acc6=io ; delay (); sclk=1; delay(); sclk=0; acc7=io; delay();

rst=0;
sclk=0;
return(ACC);
}
ds1302_c()
{
w_1302(0x80,0x80);
w_1302(0x8e,0x00);

w_1302(0x80,0x50); //;Secondsw_1302
(0x82,0x06); //Minutes=0
w_1302(0x84,0x01); //Hours=0
w_1302(0x86,0x22); //
w_1302(0x88,0x11);//
w_1302(0x8a,0x04);//
w_1302(0x8b,0x07);//

w_1302(0x8e,0x80);
w_1302(0x90,0xa6);
w_1302(0x80,0x00);
}
main(){
rst=0;
ds1302_c();

for(;;){
P2=r_1302(0x81);
}
}

---------------------------------------------------------------------------------------------------------------
File 2: Full version of the light key.c

#include
sbit di = P2^7; ////////Define pin
sbit rw = P2^6;
sbit e = P2^5;
sbit cs1 = P2^4;
sbit cs2 = P2 ^1;
sbit lcd_d = P2^0;
sbit key0 = P2^3;
sbit key1 = P2^2;
sbit key2 = P1^0;
sbit key3 = P1^1;
sbit P07 = P0^7;
sbit P06 = P0^ 6;
sbit P05 = P0^5;
sbit P04 = P0^4;
sbit P03 = P0^3;
//ds1302
sbit sclk=P1^4;
sbit io=P1^3;
sbit rst=P1^2;
sbit acc0= ACC^0;
sbit acc1=ACC^1;
sbit acc2=ACC^2;
sbit acc3=ACC^3;
sbit acc4=ACC^4;
sbit acc5=ACC^5;
sbit acc6=ACC^6;
sbit acc7=ACC^7;
typedef unsigned char byte;
typedef unsigned int word;
sbit KEY=P3^7; //Define port ds1820 according to actual situation
unsigned char key_time=0; //Global variable

//////////////////////////////////////Temperature
//ds18b20 digital temperature sensor module program

void delay1(word useconds)
{
for(;useconds>0;useconds--);
}

//Reset
byte ow_reset(void)
{
byte presence;
KEY = 0; //pull DQ line low
delay1(29); // leave it low for 480us
KEY = 1; // allow line to return high
delay1(3); // wait for presence
presence = KEY; // get presence signal
delay1(25); // wait for end of timeslot
return(presence); // presence signal returned
} // 0=presence, 1 = no part[page]

//Read a byte from the 1-wire bus
read_byte(void)
{
byte i;
byte value = 0;
for (i=8;i>0;i--)
{
value>>=1;
KEY = 0; // pull DQ low to start timeslot
KEY = 1; // then return high
delay1(1); //for (i=0; i<3; i++);
if(KEY)value|=0x80;
delay1( 6); // wait for rest of timeslot
}
return(value);
}

//Write a byte to the 1-WIRE bus
void write_byte(char val)
{
byte i;
for (i=8; i>0; i--) // writes byte, one bit at a time
{
KEY = 0 ; // pull DQ low to start timeslot
KEY = val&0x01;
delay1(5); // hold value for remainder of timeslot
KEY = 1;
val=val/2;
}
delay1(5);
}

//Read temperature
float wendu(void)
{
float tem;
union{
byte c[2];
int x;
}temp;

ow_reset();
write_byte(0xCC); // Skip ROM
write_byte(0xBE); // Read Scratch Pad
temp.c[1]=read_byte(); //lsd
temp.c[0]=read_byte(); // msd
ow_reset();
write_byte(0xCC); //Skip ROM
write_byte(0x44); // Start Conversion

tem=0.0;
if(temp.x & 0x01) tem+=0.0625;temp.x>>=1;
if(temp.x & 0x01) tem+=0.125;temp.x>>=1;
if(temp.x & 0x01) tem+=0.25;temp.x>>=1;
if(temp.x & 0x01) tem+=0.5;temp.x>>=1;
tem+=temp.x;

return term;
}

void cs1_lcd(){ ////////Select the left
bit a=1;
cs1=a;
cs2=!a;
}
void cs2_lcd(){ ////////Select the right
bit a=1;
cs1=!a;
cs2=a;
}
void busy_lcd(){//////Judge busy
bit a=1;
di=!a;
rw=a;
e=a;
while(P07==a);
}
w_lcd(unsigned b){ ///Write a to 12864
bit a=1;
busy_lcd();
rw =!a;
di =a;
P0=b;
e=a;
e=!a;
}
void dis_lcd(){//Open the display and select the first line to display
bit a=1;
busy_lcd();
rw=!a;
di=!a;
P0=0x3f;
e=a;
e=!a;
P0=0xc0;
e=a;
e=!a;
}
y_lcd(unsigned a){///The y-axis is determined by A,
bit b=1;
busy_lcd();
rw=!b;
di=!b;
P0=a;
P07=b;
P06=!b;
P05=b;
P04=b;
P03=b;
e=b;
e=!b;
}
x_lcd(unsigned a){//The x-axis is determined by a,
bit b=1;
busy_lcd();
rw=!b;
di=!b;
P0=a;
P07=!b;
P06=b;
e=b;
e=!b;
}

void clr_lcd(){///Clear screen
bit a=0;
unsigned x,y,date,i;
cs1_lcd();
date=0x00;
for(i=0;i<2;i++){
for(y=0 ;y<8;y++)
for(x=0;x<64;x++){
x_lcd(x);
y_lcd(y);
w_lcd(date);
}
cs2_lcd();}
}

unsigned char code shu[18][16]={///0 to 9 numbers
{0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x00,0x00,0x0F,0x10,0x20,0x20,0x10,0x0F,0x00},//0
{0x00,0x10,0x10,0xF8,0x00,0x00,0x00,0x00,0x00,0x20,0x20,0x3F,0x20,0x20,0x00,0x00},//1
{0x00,0x70,0x08,0x08,0x08,0x88,0x70,0x00,0x00,0x30,0x28,0x24,0x22,0x21,0x30,0x00},//2
{0x00,0x30,0x08,0x88,0x88,0x48,0x30,0x 00,0x00,0x18,0x20,0x20,0x20,0x11,0x0E,0x00},//3
{0x00,0x00,0xC0,0x20,0x10,0xF8,0x00,0x00,0x00,0x07,0x04,0x24,0x24,0x3F,0x24,0x00},///4
{0x00,0xF8,0x08,0x88,0x88,0x08,0x08,0 x00,0x00,0x19,0x21,0x20,0x20,0x11,0x0E,0x00},//5
{0x00,0xE0,0x10,0x88,0x88,0x18,0x00,0x00,0x00,0x0F,0x11,0x20,0x20,0x11,0x0E,0x00},//6
{0x00,0x38,0x08,0x08,0xC8,0x38,0x08,0x 00,0x00,0x00,0x00,0x3F,0x00,0x00,0x00,0x00},//7
{0x00,0x70,0x88,0x08,0x08,0x88,0x70,0x00,0x00,0x1C,0x22,0x21,0x21,0x22,0x1C,0x00},//8
{0x00,0xE0,0x10,0x08,0x08,0x10,0xE0,0x 00,0x00,0x00,0x31,0x22,0x22,0x11,0x0F,0x00},//9
{0x00,0x00,0x00,0xC0,0xC0,0x00,0x00,0x00,0x00,0x00,0x00,0x30,0x30,0x00,0x00,0x00},//:
{0x00,0x00,0x00,0x00,0x80,0x60,0x18,0x 04,0x00,0x60,0x18,0x06,0x01,0x00,0x00,0x00},// /
};
unsigned char code shu1[9][32]={///
{0x02,0x42,0x42,0xFE,0x42,0x42,0xFE,0x02,0x02,0xFA,0x02,0x02,0xFE,0x00,0x00,0x00,0x08,0x08,0x08,0x07,0x84,0x44,0x23,0x18,0x06,0x01,0x3E,0x40,0x43,0x40,0x78,0x00}, // Current 12
{0x00,0x04,0x04,0xC4,0x64,0x9C,0x87,0x84,0x84,0xE4,0x84,0x84,0x84,0x84,0x04,0x00,0x04,0x02,0x01,0x7F,0x00,0x20,0x20,0x20,0x20,0x3F,0x20,0x20,0x20,0x20,0x20,0x00,0x00}, // at 13
{0x00,0xFC,0x44,0x44,0x44,0xFC,0x10,0x90,0x10,0x10,0x10,0xFF,0x10,0x10,0x10,0x00,0x00,0x07,0x04,0x04,0x04,0x07,0x00,0x00,0x03,0x40,0x80,0x7F,0x00,0x00,0x00,0x00,0x00}, //Time 14
{0x00,0xF8,0x01,0x06,0x00,0xF0,0x92,0x92,0x92,0x92,0xF2,0x02,0x02,0xFE,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,0x07,0x04,0x04,0x04,0x04,0x07,0x40,0x80,0x7F,0x00,0x00}, // 15
{0x00,0x00,0x00,0xBE,0x2A,0x2A,0x2A,0xEA,0x2A,0x2A,0x2A,0x2A,0x3E,0x00,0x00,0x00,0x00,0x48,0x46,0x41,0x49,0x49,0x49,0x7F,0x49 ,0x49,0x49,0x49,0x49,0x41,0x40,0x00},//star 16
{0x00,0x04,0xFF,0x54,0x54,0x54,0xFF,0x04,0x00,0xFE,0x22,0x22,0x22,0xFE,0x00,0x00,0x42,0x22,0x1B,0x02,0x02,0x0A,0x33,0x62,0x18,0 x07,0x02,0x22,0x42,0x3F,0x00,0x00},//Issue 17
{0x10,0x21,0x86,0x70,0x00,0x7E,0x4A,0x4A,0x4A,0x4A,0x4A,0x7E,0x00,0x00,0x00,0x00,0x02,0xFE,0x01,0x40,0x7F,0x41,0x41,0x7F,0x 41,0x41,0x7F,0x41,0x41,0x7F,0x40,0x00},//Wen 18
{0x00,0x00,0xFC,0x04,0x24,0x24,0xFC,0xA5,0xA6,0xA4,0xFC,0x24,0x24,0x24,0x04,0x00,0x80,0x60,0x1F,0x80,0x80,0x42,0x46,0x2A,0x12 ,0x12,0x2A,0x26,0x42,0xC0,0x40,0x00},//degree 19
};

unsigned char time1[7]={0x30,0x00,0x16,8,7,2,8};//Seconds, minutes, hours, days, months, weeks, and years respectively. The subroutine is from http://www.51hei.com hkcd moderator and has passed the test.
delay()
{
unsigned char i;
i=10;
i=10;
i=10;
i=10;
i=10;
i=10;
i=10;}
w_1302(unsigned char dat,unsigned char shu){//Write an eight-bit number to DS1302 //Rising efficiency ;;;Select the write address and then write the data

ACC=dat;//address
sclk=0;
rst=1;//
io=acc0;///
sclk=0;
delay();
sclk=1;
io=acc1;
sclk=0;
delay();
sclk= 1;
io=acc2;
sclk=0;
delay(); sclk
=1
; io=acc3; sclk
=0;
delay();
sclk=1;
io=acc4;
sclk=0;
delay();
sclk=1;
io=acc5;
sclk=0;
delay(); sclk
=1;
io=acc6; sclk
=0;
delay(); sclk
=1;
io=acc7;
sclk=0;
delay();
sclk=1;// /

//sclk=0;
ACC=shu; //data
io=acc0;///
sclk=0;
delay(); sclk
=1
; io=acc1;
sclk=0;
delay();
sclk=1;
io= acc2;
sclk=0;
delay();
sclk=1;
io=acc3; sclk
=0;
delay()
; sclk=1;
io=acc4; sclk
=0
; delay();
sclk=1;
io=acc5;
sclk=0;
delay();
sclk=1;
io=acc6; sclk
=0;
delay()
; sclk=1;
io=acc7;
sclk=0;
delay();
sclk=1;///

rst=0 ;
sclk=0;
} ///Complete writing
unsigned char r_1302(unsigned char ADD){

sclk=0;
rst=1;
ACC=ADD; //Address
io=acc0;///
sclk=0;
delay();
sclk=1;
io=acc1; sclk
=0;
delay();
sclk=1;
io=acc2;
sclk=0;
delay();
sclk=1;
io=acc3;
sclk=0;
delay();
sclk=1;
io=acc4; sclk
=0;
delay(); sclk=1 ; io=acc5; sclk=0; delay(); sclk= 1; io=acc6; sclk=0; delay(); sclk=1; io=acc7; sclk=0;///// delay(); sclk=1;

delay();
sclk=0;
acc0=io; delay
(); sclk
= 1; delay(); sclk=0; acc1=io; delay(); sclk=1; delay(); sclk=0; acc2= io; delay(); sclk=1; delay(); sclk =0; acc3=io; delay () ; sclk=1; delay(); sclk=0; acc4=io; delay(); sclk=1; delay(); sclk=0; acc5=io; delay (); sclk = 1; delay(); sclk=0; acc6=io; delay(); sclk=1; delay(); sclk=0; acc7= io; delay();

rst=0;
sclk=0;
return(ACC);
}
ds1302_c()
{
w_1302(0x80,0x80);
w_1302(0x8e,0x00);
w_1302(0x80,time1[0]); //;
Secondsw_1302(0x82,time1[1]); //Minute=0
w_1302(0x84,time1[2]); //Hour=0
w_1302(0x86,
time1[3]); //
Dayw_1302(0x88,time1[4]);//Monthw_1302(0x8a,time1[5]);//Weekw_1302
(0x8c,time1[6]);//Yearw_1302
(0x8e,0x80);
w_1302(0x90,0xb8);
w_1302(0x80,0x00);
}

//x_lcd(unsigned a){//X axis is determined by a //y_lcd(unsigned a){///Y axis is determined by A
//void dis_lcd(){//Open the display and select the first line to display//w_lcd(unsigned b){ ///Write a to 12864
//void busy_lcd(){//////Judge busy //void cs1_lcd(){ ////////Select the left side
//void cs2_lcd(){ ////////Select the right
sided12864_lcd(unsigned char x,y,k){
unsigned char ix,iy,i;
dis_lcd();//Open the displayif
(x>63){
x=x-64;
cs2_lcd();
}
else cs1_lcd();
i=0;
if(k<12){
for(iy=0;iy<2;iy++) for(ix =
0;ix<8;ix++){ y_lcd (
iy+y)
; (
shu1[k][i]); i ++
; }
}
} [ page ]

time_lcd(){
unsigned char y,k,time,add,i,we1,we2;
add=128;///////must be less than 64-8 and greater than 64
d12864_lcd(0,0,12);//: North
d12864_lcd(16,0,13);//: Beijing
d12864_lcd(31,0,14);//: Time
d12864_lcd(47,0,15);//: Time
k=0x81;
y=0; //On which line to display
for(i=0;i<3;i++){
time=r_1302(k);
time1[i]=time;
add=add-8;;
time=time&0x0f;
d12864_lcd(add,y,time);///Seconds
add=add-8;
time=r_1302(k);
time&=0xf0;
time>>=4;
d12864_lcd(add,y,time);//second ten
digitadd=add-8;;
k+=2;
}
d12864_lcd(40+64,y,10);//:
d12864_lcd(16+64,y,10);//: display two points
//
time1[5]=r_1302(0x8b);
d12864_lcd(64,4,16);//:
stard12864_lcd(64+16,4,17);//:
dater_1302(0x8b);//read day of
the weekd12864_lcd(64+32,4,r_1302(0x8b));//: read day of the week and display
////
y=2;//Display in the fourth lineadd
=56+16;
time=r_1302(0x87);
time1[3]=time;
d12864_lcd(add,y,time&0x0f);//: Display daytime
=r_1302(0x87);
time&=0xf0;
time>>=4;
add-=8;
d12864_lcd(add,y,time); //Display the tens digit of the dayadd-
=8;
add-=8;
time1[4]=time=r_1302(0x89);
d12864_lcd(add,y,time&0x0f);//: Display monthtime
=r_1302(0x89);
time&=0xf0;
time>>=4;
add-=8;
d12864_lcd(add,y,time); //Display the tens digit of the monthadd-
=8;
add-=8;
time1[6]=time=r_1302(0x8d);
d12864_lcd(add,y,time&0x0f);//: display yeartime
=r_1302(0x8d);
time&=0xf0;
time>>=4;
add-=8;
d12864_lcd(add,y,time); //display the tenth digit of the year
//////Read

d12864_lcd(40+16,y,11);//:
d12864_lcd(16+16,y,11);//: display two digits
add-=8;
d12864_lcd(add,y,0);//: 0
add-=8;
d12864_lcd(add,y,2);//: 2

d12864_lcd(0,4,18);//:
d12864_lcd(16,4,19);//: temperature
we1=wendu();
we2=we1/10;
d12864_lcd(32,4,we2);//:
we2=we1-we2*10;
d12864_lcd(40,4,we2);//: display temperature value cs1_lcd
();
y_lcd(4);
x_lcd(50);
w_lcd(0x18);
x_lcd(51);
w_lcd(0x18);
}
//////////////////////////Display time completed

hei_lcd(unsigned char x,y){ //All black is used for flash mark
char iy,ix,di,i;
di=0x00;
if(x>63){
x=x-64;
cs2_lcd();
}
else cs1_lcd();
i=0;
for(iy=0;iy<2;iy++){
for(ix=0;ix<16;ix++){
y_lcd(iy+y);
x_lcd(ix+x);
w_lcd(di);
}
}
}
key_t(){ //Keyboard key1 plus 1 key2 minus 1

if(!key1){
key_time++;
delay1(20000);
while(!key1);
}
if(!key2){
key_time--;
delay1(20000);
while(!key2);
}
}

void delay11(word useconds)
{
for(;useconds>0;useconds--)
key_t();
}

time_key(){
unsigned char keyd,ktime;
unsigned int year;
word kk;
keyd=0;
kk=10000;///Flash speedif
(!key0){
for(;;){
if(!key0){
keyd=keyd+1;
delay1(500);
if(keyd>8)keyd=1;
key_time=0;//////Clear the stored time every time a setting is changed
key0=1;
while(!key0);
key0=1;
}
/////////////////////////Flash programif
(keyd==1){//=1 enter the second flash and set the second timekey_time
=(time1[0]&0x0f)+((time1[0]&0xf0)>>4)*10; //Transfer the number in the number to key_time decimal
hei_lcd(112,0);//x y
delay11(kk);////// flashing speedif
(key_time>=60)key_time=0;
d12864_lcd(112,0,key_time/10);
d12864_lcd(120,0,key_time-(key_time/10)*10);
time1[0]=(((key_time/10)<<4)&0xf0)+(key_time-(key_time/10)*10); //Convert to BCD code and store in array
delay1(10000);
}
if(keyd==2){//=1 enters the flash and sets the second time at the same time
key_time=(time1[1]&0x0f)+((time1[1]&0xf0)>>4)*10; //Convert the number in the number sister to key_time decimal
hei_lcd(88,0);//x y
delay11(kk);//////Flashing speedif
(key_time>=60)key_time=0;
d12864_lcd(88,0,key_time/10);
d12864_lcd(96,0,key_time-(key_time/10)*10);
delay1(10000);
time1[1]=(((key_time/10)<<4)&0xf0)+(key_time-(key_time/10)*10); //Convert to BCD code and store in array
}
if(keyd==3){//=1 when entering, flash and set the second time
key_time=(time1[2]&0x0f)+((time1[2]&0xf0)>>4)*10; //Convert the number in the number sister to key_time decimal
hei_lcd(64,0);//x y
delay11(kk);//////Flashing speedif
(key_time>=24)key_time=0;
d12864_lcd(64,0,key_time/10);
d12864_lcd(72,0,key_time-(key_time/10)*10);
time1[2]=(key_time/10)<<4+(key_time-key_time/10);
delay1(10000);
time1[2]=(((key_time/10)<<4)&0xf0)+(key_time-(key_time/10)*10); //Convert to BCD code and store in array
}
if(keyd==4){//=1 enter year flash and set second time
key_time=(time1[6]&0x0f)+((time1[6]&0xf0)>>4)*10; //Convert the number in number sister to key_time in decimal
hei_lcd(16,2);//x y
delay11(kk);//////Flashing speed
if(key_time>99)key_time=0;
d12864_lcd(16,2,key_time/10);
d12864_lcd(24,2,key_time-(key_time/10)*10);
time1[6]=(key_time/10)<<4+(key_time-key_time/10);
delay1(10000);
time1[6]=(((key_time/10)<<4)&0xf0)+(key_time-(key_time/10)*10); //Convert to BCD code and store in array
}

if(keyd==5){//=1 enter the month flash and set the second time
key_time=(time1[4]&0x0f)+((time1[4]&0xf0)>>4)*10; //Convert the number in the number sister to key_time in decimal
hei_lcd(40,2);//x y
delay11(kk);//////Flashing speed
if(key_time>=13)key_time=0;
d12864_lcd(40,2,key_time/10);
d12864_lcd(48,2,key_time-(key_time/10)*10);
time1[4]=(key_time/10)<<4+(key_time-key_time/10);
delay1(10000);
time1[4]=(((key_time/10)<<4)&0xf0)+(key_time-(key_time/10)*10); //Convert to BCD code and store in array
}

if(keyd==6){//=1 to enter day flash and set second time at the same time
key_time=(time1[3]&0x0f)+((time1[3]&0xf0)>>4)*10; //Convert the number in number sister to key_time decimal
year=(time1[4]&0x0f)+(((time1[4]&0xf0)>>4)*10)+2000;
switch(time1[4]){ //Calculate leap month
case 1: ktime=31;break;
case 3: ktime=31;break;
case 5: ktime=31;break;
case 7: ktime=31;break;
case 8: ktime=31;break;
case 10: ktime=31;break;
case 12: ktime=31
;break ;
case 6: ktime=30; break; case
9: ktime=30;break ;
case 11: ktime=30;break;
case 2: if(year%4==0&&year%100!=0||year%400==0) ktime=29;
else ktime=29;break;
}
hei_lcd(64,2);//x y
delay11(kk);//////Flashing speed
if(key_time>ktime)key_time=0;
d12864_lcd(64,2,key_time/10);
d12864_lcd(72,2,key_time-(key_time/10)*10);
time1[3]=(key_time/10)<<4+(key_time-key_time/10);
delay1(10000);
time1[3]=(((key_time/10)<<4)&0xf0)+(key_time-(key_time/10)*10); //Convert to BCD code and store in array
}

if(keyd==7){//=1 enters week flash and sets second time
char iy,ix,di,i;
key_time=time1[5];
di=0x00;
cs2_lcd();
i=0;
for(iy=0;iy<2;iy++){
for(ix=0;ix<8;ix++){
y_lcd(iy+4);
x_lcd(ix+96);
w_lcd(di);
}
di=00;
}
delay11(kk);//////Flashing speedif
(key_time>7)key_time=0;
d12864_lcd(96,4,key_time);
time1[5]=key_time;
delay1(10000);
time1[5]=key_time; //Convert to BCD code and store in array
}
/////////////////////
if(!key3)break;
}
ds1302_c(); ///Change time
}
}

////////////////
lcd_key(){
if(!key3){
if(!key2)lcd_d=1;
else lcd_d=0;
}
}
main(){
ds1302_c();
clr_lcd ();
for(;;){
time_lcd();
time_key();
lcd_key();
}
}