数码管的显示网上大把,移植一下就可以了.
//--------LCD 1601 clock----------------------------------------
//---modified from a LCD1602 program,2012/11/21-----------------
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
//----P3: key input for modify timer ---------------------------
#define KEY_IO P3
#define LCD_IO P0
sbit LCD_RS = P2^0
sbit LCD_RW = P2^1
sbit LCD_EN = P2^2
//----P1.2: timer speaker output-------------------------------
sbit SPK = P1^2
//----P2.4: timer LED indicator output------------------------
sbit LED = P2^4
bit new_s, modify = 0
char t0, sec = 50, min = 59, hour = 23
//char code LCD_line1[] = "Designed by ZELD"野孝
char code LCD_line2[] = "Timer: 00:00:00 "
char Timer_buf[] = "23:59:50"
//---------------------------------------------------
void delay(uint z)
{
uint x, y
for(x = zx >0x--) for(y = 100y >0y--)
}
//---------------------------------------------------
void W_LCD_Com(uchar com) //写指令
{
LCD_RS = 0 LCD_IO = com// LCD_RS和R/W都为低电平时，写入指令
LCD_EN = 1 delay(5)LCD_EN = 0//用EN输入一个高脉冲
}
//---------------------------------------------------
void W_LCD_Dat(uchar dat) //写数据
{
LCD_RS = 1 LCD_IO = dat// LCD_RS为高、R/W为低时，写入数据
LCD_EN = 1 delay(5)LCD_EN = 0//用EN输入一个旦羡高模脊拍脉冲
}
//---------------------------------------------------
void W_LCD_STR(uchar *s) //写字符串
{
while(*s) W_LCD_Dat(*s++)
}
//---------------------------------------------------
void W_BUFF(void) //填写显示缓冲区
{
Timer_buf[7] = sec % 10 + 48Timer_buf[6] = sec / 10 + 48
Timer_buf[4] = min % 10 + 48Timer_buf[3] = min / 10 + 48
Timer_buf[1] = hour % 10 + 48Timer_buf[0] = hour / 10 + 48
//W_LCD_Com(0xc0 + 7)W_LCD_STR(Timer_buf)
//1602 start from address C0H(second row),1601 start from 40H-------
W_LCD_Com(0x80 + 7)W_LCD_STR(Timer_buf)
}
//---------------------------------------------------
uchar read_key(void)
{
uchar x1, x2
KEY_IO = 255
x1 = KEY_IO
if (x1 != 255) {
delay(100)
x2 = KEY_IO
if (x1 != x2) return 255
while(x2 != 255) x2 = KEY_IO
if (x1 == 0x7f) return 0
else if (x1 == 0xbf) return 1
else if (x1 == 0xdf) return 2
else if (x1 == 0xef) return 3
else if (x1 == 0xf7) return 4
}
return 255
}
//---------------------------------------------------
void Init()
{
LCD_RW = 0
W_LCD_Com(0x38)delay(50)
W_LCD_Com(0x0c)
W_LCD_Com(0x06)
W_LCD_Com(0x01)
// W_LCD_Com(0x80)W_LCD_STR(LCD_line1)
// W_LCD_Com(0xC0)W_LCD_STR(LCD_line2)
W_LCD_Com(0x80)W_LCD_STR(LCD_line2)
TMOD = 0x01 //T0定时方式1
TH0 = 0x4c
TR0 = 1 //启动T0
PT0 = 1 //高优先级, 以保证定时精度
ET0 = 1
EA = 1
}
//---------------------------------------------------
void main()
{
uint i, j
uchar Key
Init()
while(1) {
//-------------------------------
if (new_s) { //如果出现了新的一秒, 修改时间
new_s = 0 sec++ sec %= 60
if(!sec) { min++ min %= 60
if(!min) { hour++hour %= 24}
}
W_BUFF() //写显示
//-------------------------------
if (!sec &&!min) { //整点报时
for (i = 0i <200i++) {
SPK = 0for (j = 0j <100j++)
SPK = 1for (j = 0j <100j++)
} }
}
//-------------------------------
Key = read_key() //读出按键
switch(Key) { //分别处理四个按键
case 0: modify = 1break
case 1: if(modify) {min++ min %= 60 W_BUFF()break}
case 2: if(modify) {hour++hour %= 24W_BUFF()break}
case 3: modify = 0break
} }
}
//---------------------------------------------------
void timer0(void) interrupt 1 //T0中断函数, 50ms执行一次
{
TH0 = 0x4c
t0++t0 %= 20 //20, 一秒钟
if(t0 == 0) {new_s = 1LED = ~LED}
if(modify) LED = 0
}
//===================================================
//12M晶振
//共阴数码管
#include <reg51.h>
sbit red=P1^0
sbit green=P1^1
sbit yellow=P1^2
bit flag=1
unsigned char code duan[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}
unsigned char code wei[ ]={0xfd,0xfe}
unsigned char time=35
void main()
{
void show_time()
void show_light()
EA=1
ET0=1
TMOD=0x01
TH0=(65536-50000)/256
TL0=(65536-50000)%256
TR0=1
red=0
while(1)
{
show_time()
show_light()
}
}
void show_time()
{
void delay()
unsigned char num=time,i
for(i=0i<2++i)
{
P2=wei[i]
P0=duan[num%10]
delay()
P0=0x00
num/=10
}
}
void delay()
{
int i
for(i=1000ii--)
}
void show_light()
{
if(flag)
{
if(!time)
{
flag=0
red=1
green=0
time=35
}
}
else
{
if(time>0&&time<4)
{
green=1
yellow=0
液数轮 }
毕并 if(!time)
{
yellow=1
red=0
flag=1
time=35
}
}
}
void dec_sec() interrupt 1
{
static count=0
TH0=(65536-50000)/256
TL0=(65536-50000)%256
if(++count==20)
{
闹信 count=0
time--
}
}
#include<reg52.h>#define uchar unsigned char
#define duan P0 //共阴数码管的阳极端口
sbit wei1=P2^4 //共阴数码管的阳极端口，我的是四位的，下面语句中把1，2关了，只用到了3，4。
sbit wei2=P2^5
sbit wei3=P2^6
sbit wei4=P2^7
uchar code num[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}；//共阴数码管0~9的十六进制码
void delay(uchar xms)//软件延时
{
int i,j
for(i=xmsi>0i--)
for(j=125j>0j--)
}
void display(int tens,ones) //用来显示数字的函数,显示此时的十位，个亩尘位。
{
int i,j
for(i=2i>0i--)//通过改变i和j的值，可以改段掘变计时时间。
for(j=50j>0j--)
{
wei3=1//扫描原理。
wei4=0
duan=num[tens]
delay(5)
wei3=0
wei4=1
duan=num[ones]
delay(5)
}
}
void main()
{
int onesp=0,tensp=0//定义ones place和tens place。
wei1=0
wei2=0
while(1)
{
for(tensp=9tensp>=0tensp--)
{
for(onesp=9onesp>=0onesp--)
{
display(tensp,onesp)//调用函数握耐核显示此时的数字。
}
}
}
}
这个程序测试可用，从99计数到00。只用了比较简单知识，不涉及定时器和系统中断。不懂可以追问。
欢迎分享，转载请注明来源：内存溢出
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