学校的一个课设
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2 LCD定时闹钟设计
1、 分别显示时钟/定时时间，格式“时时：分分：秒秒”；
2、 两屏显示区分：均分两行显示，第一行分别为“时钟”，“计时”；
3、 计时结束报警，由蜂鸣器实现；
4、 时钟/闹钟时间设置功能键如下：
（1） 模式键K1，实现时钟/计时显示切换；
（2） 时分秒时间设置键:K2,K3,K4，按相应键实现相应时间加一；
（3） 计时开始/停止键K5，实现计时开始/停止切换
#include "reg52.h"
#include "intrins.h"
#include "string.h"
sbit RS = P1^0;
sbit RW = P1^1;
sbit E = P1^2;
sbit BEEP = P1^3;
char count;
long second = 0;
void T0_init(void)
{
TMOD = 0x01;
TH0 = 0x3C;
TL0 = 0x0B0;
EA = 1;
ET0 = 1;
TR0 = 0;
TR1 = 0;
}
void T1_init(void)
{
TMOD = 0x10;
TH1 = 0x3C;
TL1 = 0x0B0;
EA = 1;
ET1 = 1;
TR1 = 0;
TR0 = 0;
}
void delay(int x)
{
unsigned int i,j;
for(i=x;i>0;i--)
for(j=120;j>0;j--);
}
void write_command(char dat)
{
E = 0;
RS = 0;
_nop_();
RW = 0;
P2 = dat;
delay(5);
E = 1;
}
void write_char(char dat)
{
E = 0;
RS = 1;
_nop_();
RW = 0;
P2 = dat;
delay(5);
E = 1;
}
void init(void)
{
char i = 0;
write_command(0x38);
i = 0;
while(P2^7 == 0&&i>5)
{
delay(1);
i++;
}
write_command(0x08);
i = 0;
while(P2^7 == 0&&i>5)
{
delay(1);
i++;
}
write_command(0x01);
i = 0;
while(P2^7 == 0&&i>5)
{
delay(1);
i++;
}
write_command(0x06);
i = 0;
while(P2^7 == 0&&i>5)
{
delay(1);
i++;
}
write_command(0x0c);
i = 0;
while(P2^7 == 0&&i>5)
{
delay(1);
i++;
}
}
void display(char add,char c)
{
write_command(0x80+add);
switch(c)
{
case(0):write_char('0');break;
case(1):write_char('1');break;
case(2):write_char('2');break;
case(3):write_char('3');break;
case(4):write_char('4');break;
case(5):write_char('5');break;
case(6):write_char('6');break;
case(7):write_char('7');break;
case(8):write_char('8');break;
case(9):write_char('9');break;
}
}
void time_display(void)
{
char temp;
temp = second/36000;
display(0x04,temp);
temp = (second/3600)%10;
display(0x05,temp);
write_command(0x80+0x06);write_char(':');
temp = (second%3600)/600;
display(0x07,temp);
temp = ((second%3600)/60)%10;
display(0x08,temp);
write_command(0x80+0x09);write_char(':');
temp = (second%60)/10;
display(0x0a,temp);
temp = (second%60)%10;
display(0x0b,temp);
}
void count_down_display(void)
{
char temp;
temp = second/36000;
display(0x44,temp);
temp = (second/3600)%10;
display(0x45,temp);
write_command(0x80+0x46);write_char(':');
temp = (second%3600)/600;
display(0x47,temp);
temp = ((second%3600)/60)%10;
display(0x48,temp);
write_command(0x80+0x49);write_char(':');
temp = (second%60)/10;
display(0x4a,temp);
temp = (second%60)%10;
display(0x4b,temp);
}
char scan_key(void)
{
char key = 6,a = 0;
P3 = 0x07;
if(P3 != 0x07)
{
delay(5);
if(P3 != 0x07)
{
switch(P3)
{
case(0x06):key = 1;break;
case(0x05):key = 2;break;
case(0x03):key = 3;break;
}
P3 = 0x18;
switch(P3)
{
case(0x10):key += 0;break;
case(0x08):key += 3;break;
}
}
while((a<130)&&(P3 != 0x18))
{
delay(1);
a++;
}
}
return key;
}
void alarm(void)
{
char i;
for(i=0;i<8;i++)
{
BEEP = ~BEEP;
delay(400);
}
}
void main(void)
{
char k;
BEEP = 0;
init();
flag1:
T0_init();
while(1)
{
k = scan_key();
if(k != 6)
{
switch(k)
{
case(1):second += 1;break;
case(2):second += 60;break;
case(3):second += 3600;break;
case(4):TR0 = ~TR0;goto flag3;break;
case(5):write_command(0x01);second = 0;goto flag2;break;
}
}
if(second >= 86400)
{
second = 0;
}
time_display();
}
flag2:
T1_init();
while(1)
{
k = scan_key();
if(k != 6)
{
switch(k)
{
case(1):second += 1;break;
case(2):second += 60;break;
case(3):second += 3600;break;
case(4):TR1 = ~TR1;goto flag4;break;
case(5):write_command(0x01);second = 0;count = 0;goto flag1;break;
}
}
if(second >= 86400)
{
second = 0;
}
count_down_display();
}
flag3:
while(1)
{
k = scan_key();
switch(k)
{
case(4):TR0 = ~TR0;break;
case(5):write_command(0x01);second = 0;count = 0;goto flag2;break;
}
if(second >= 86400)
{
second = 0;
}
time_display();
}
flag4:
while(1)
{
k = scan_key();
switch(k)
{
case(4):TR0 = ~TR0;break;
case(5):write_command(0x01);second = 0;count = 0;goto flag1;break;
}
count_down_display();
if(second < 0)
{
second = 0;
count = 0;
TR1 = 0;
alarm();
goto flag2;
}
}
}
void Timer0Interrupt(void) interrupt 1
{
TH0 = 0x3C;
TL0 = 0x0B0;
count++;
if(count >= 20)
{
second++;
count = 0;
if(second>=86400)
{
second = 0;
count = 0;
}
}
#include <REGX51.H>
}
void Timer1Interrupt(void) interrupt 3
{
TH1 = 0x3C;
TL1 = 0x0B0;
count++;
if(count >= 20)
{
second--;
count = 0;
}
}