数码管代码部分
数码管真值表#include <reg52.h>
sbit ADDR0 = P1 ^ 0;
sbit ADDR1 = P1 ^ 1;
sbit ADDR2 = P1 ^ 2;
sbit ADDR3 = P1 ^ 3;
sbit ENLED = P1 ^ 4;
void main(void)
{
ENLED = 0;
ADDR3 = 1; // U3 74HC138芯片使能
ADDR2 = 0;
ADDR1 = 0;
ADDR0 = 0; // 三极管导通
P0 = 0xf9; //数字1
while (1);
}单个数码管倒计时
#include <reg52.h>
sbit ADDR0 = P1 ^ 0;
sbit ADDR1 = P1 ^ 1;
sbit ADDR2 = P1 ^ 2;
sbit ADDR3 = P1 ^ 3;
sbit ENLED = P1 ^ 4;
unsigned char code LedChar[] =
{
0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8,
0x80, 0x90, 0x88, 0x83, 0xC6, 0xA1, 0x86, 0x8E
};//真值表
void main(void)
{
char i = 15; // 真值表下标
char cnt = 0;// 定时器溢出次数
ENLED = 0;
ADDR3 = 1; // U3 74HC138芯片使能
ADDR2 = 0;
ADDR1 = 0;
ADDR0 = 0; // 三极管导通
TMOD = 1; // 设置定时器0为模式1
TH0 = 0xB8;
TL0 = 0x00; // 设置定时器0的初始值
TR0 = 1; // 定时器0开始工作
P0= LedChar;
while (1) {
if (1 == TF0) // 定时器溢出
{
TF0 = 0;//将溢出标志恢复初值，再次定时
TH0 = 0xB8;
TL0 = 0x00; // 设置定时器0的初始值
cnt++;
if (cnt >= 50)
{
cnt = 0;
if (i < 0)
i = 15;
P0 = LedChar;
}
}
}
}6段数码管动态显示
#include <reg52.h>
sbit ADDR0 = P1 ^ 0;
sbit ADDR1 = P1 ^ 1;
sbit ADDR2 = P1 ^ 2;
sbit ADDR3 = P1 ^ 3;
sbit ENLED = P1 ^ 4;
unsigned char code LedChar[] =
{
0xC0, 0xF9, 0xA4, 0xB0, 0x99,
0x92, 0x82, 0xF8, 0x80, 0x90
};
unsigned char LedBuff[] =
{
0xFF, 0XFF, 0XFF, 0XFF, 0XFF, 0XFF
};
void main(void)
{
unsigned char i = 0;//当前工作的数码管下标
unsigned int cnt = 0;//溢出次数
unsigned long sec = 0; // 秒
ENLED = 0;
ADDR3 = 1; // U3 74HC138芯片使能
ADDR2 = 0;
ADDR1 = 0;
ADDR0 = 0; // 三极管导通
TMOD = 1; // 设置定时器0为模式1
TH0 = 0xFC;
TL0 = 0x67; // 设置定时器0的初始值
TR0 = 1; // 定时器0开始工作
while (1)
{
if (1 == TF0) // 定时器溢出
{
TF0 = 0; // 将溢出标志恢复初值，再次定时
TH0 = 0xFC;
TL0 = 0x67; // 设置定时器0的初始值
cnt++;
if (cnt >= 1000) //1s
{
cnt = 0;
sec++;
if (sec >= 999999)
sec = 0;
LedBuff = LedChar;
LedBuff = LedChar[(sec / 10) % 10];
LedBuff = LedChar[(sec / 100) % 10];
LedBuff = LedChar[(sec / 1000) % 10];
LedBuff = LedChar[(sec / 10000) % 10];
LedBuff = LedChar[(sec / 100000) % 10];
}
switch (i)
{
case 0:
ADDR2 = 0;
ADDR1 = 0;
ADDR0 = 0; // 三极管导通
P0 = LedBuff;
i++;
break;
case 1:
ADDR2 = 0;
ADDR1 = 0;
ADDR0 = 1; // 三极管导通
P0 = LedBuff;
i++;
break;
case 2:
ADDR2 = 0;
ADDR1 = 1;
ADDR0 = 0; // 三极管导通
P0 = LedBuff;
i++;
break;
case 3:
ADDR2 = 0;
ADDR1 = 1;
ADDR0 = 1; // 三极管导通
P0 = LedBuff;
i++;
break;
case 4:
ADDR2 = 1;
ADDR1 = 0;
ADDR0 = 0; // 三极管导通
P0 = LedBuff;
i++;
break;
case 5:
ADDR2 = 1;
ADDR1 = 0;
ADDR0 = 1; // 三极管导通
P0 = LedBuff;
i = 0;
break;
}
}
}
}动态显示的数码管显示消隐
#include <reg52.h>
sbit ADDR0 = P1 ^ 0;
sbit ADDR1 = P1 ^ 1;
sbit ADDR2 = P1 ^ 2;
sbit ADDR3 = P1 ^ 3;
sbit ENLED = P1 ^ 4;
unsigned char code LedChar[] =
{
0xC0, 0xF9, 0xA4, 0xB0, 0x99,
0x92, 0x82, 0xF8, 0x80, 0x90
};
unsigned char LedBuff[] =
{
0xFF, 0XFF, 0XFF, 0XFF, 0XFF, 0XFF
};
void main(void)
{
unsigned char i = 0;//当前工作的数码管下标
unsigned int cnt = 0;//溢出次数
unsigned long sec = 0; // 秒
ENLED = 0;
ADDR3 = 1; // U3 74HC138芯片使能
ADDR2 = 0;
ADDR1 = 0;
ADDR0 = 0; // 三极管导通
TMOD = 1; // 设置定时器0为模式1
TH0 = 0xFC;
TL0 = 0x67; // 设置定时器0的初始值
TR0 = 1; // 定时器0开始工作
while (1)
{
if (1 == TF0) // 定时器溢出
{
TF0 = 0; // 将溢出标志恢复初值，再次定时
TH0 = 0xFC;
TL0 = 0x67; // 设置定时器0的初始值
cnt++;
if (cnt >= 1000) //1s
{
cnt = 0;
sec++;
if (sec >= 999999)
sec = 0;
LedBuff = LedChar;
LedBuff = LedChar[(sec / 10) % 10];
LedBuff = LedChar[(sec / 100) % 10];
LedBuff = LedChar[(sec / 1000) % 10];
LedBuff = LedChar[(sec / 10000) % 10];
LedBuff = LedChar[(sec / 100000) % 10];
}
P0 = 0xFF;//显示消隐处理
switch (i)
{
case 0:
ADDR2 = 0;
ADDR1 = 0;
ADDR0 = 0; // 三极管导通
P0 = LedBuff;
i++;
break;
case 1:
ADDR2 = 0;
ADDR1 = 0;
ADDR0 = 1; // 三极管导通
P0 = LedBuff;
i++;
break;
case 2:
ADDR2 = 0;
ADDR1 = 1;
ADDR0 = 0; // 三极管导通
P0 = LedBuff;
i++;
break;
case 3:
ADDR2 = 0;
ADDR1 = 1;
ADDR0 = 1; // 三极管导通
P0 = LedBuff;
i++;
break;
case 4:
ADDR2 = 1;
ADDR1 = 0;
ADDR0 = 0; // 三极管导通
P0 = LedBuff;
i++;
break;
case 5:
ADDR2 = 1;
ADDR1 = 0;
ADDR0 = 1; // 三极管导通
P0 = LedBuff;
i = 0;
break;
}
}
}
}采用中断的动态显示
#include <reg52.h>
sbit ADDR0 = P1 ^ 0;
sbit ADDR1 = P1 ^ 1;
sbit ADDR2 = P1 ^ 2;
sbit ADDR3 = P1 ^ 3;
sbit ENLED = P1 ^ 4;
unsigned char code LedChar[] =
{
0xC0, 0xF9, 0xA4, 0xB0, 0x99,
0x92, 0x82, 0xF8, 0x80, 0x90
};//数码管真值表
unsigned char LedBuff[] =
{
0xff, 0xff, 0xff, 0xff, 0xff, 0xff
};//数码管显示缓冲区
unsigned char i = 0;//动态扫描的索引
unsigned int cnt = 0;//记录T0中断次数
unsigned char flag1s = 0;//1s定时标志
void main(void)
{
unsigned long sec = 0;//记录经过的秒数
EA = 1;//使能总中断
ENLED = 0;
ADDR3 = 1;//U3 74HC138芯片使能
TMOD = 0x01;//设置定时器T0模式1
TH0 = 0xFC;
TL0 = 0x67;//设置定时器T0的初值
ET0 = 1;//使能定时器T0中断
TR0 = 1;//启动定时器T0
while (1)
{
if (1 == flag1s)//判断1s定时标志
{
flag1s = 0;//1s定时标志清零
sec++;//秒数加1
//设置数码管的值
LedBuff = LedChar;
LedBuff = LedChar[(sec / 10) % 10];
LedBuff = LedChar[(sec / 100) % 10];
LedBuff = LedChar[(sec / 1000) % 10];
LedBuff = LedChar[(sec / 10000) % 10];
LedBuff = LedChar[(sec / 100000) % 10];
}
}
}
void InterruptTimer0() interrupt 1
{
TH0 = 0xFC;
TL0 = 0x67;//设置定时器T0的初值
cnt++;//中断次数+1
if (cnt >= 1000)//中断1000次即1秒
{
cnt = 0;//中断次数清零
flag1s = 1;//设置1s定时标志为1
}
P0 = 0xff;//显示消隐
switch (i)
{
case 0:
ADDR2 = 0;
ADDR1 = 0;
ADDR0 = 0; // 三极管导通
P0 = LedBuff;
i++;
break;
case 1:
ADDR2 = 0;
ADDR1 = 0;
ADDR0 = 1; // 三极管导通
P0 = LedBuff;
i++;
break;
case 2:
ADDR2 = 0;
ADDR1 = 1;
ADDR0 = 0; // 三极管导通
P0 = LedBuff;
i++;
break;
case 3:
ADDR2 = 0;
ADDR1 = 1;
ADDR0 = 1; // 三极管导通
P0 = LedBuff;
i++;
break;
case 4:
ADDR2 = 1;
ADDR1 = 0;
ADDR0 = 0; // 三极管导通
P0 = LedBuff;
i++;
break;
case 5:
ADDR2 = 1;
ADDR1 = 0;
ADDR0 = 1; // 三极管导通
P0 = LedBuff;
i = 0;
break;
default:
break;
}
}动态显示时不显示高位0-采用中断
#include <reg52.h>
sbit ADDR0 = P1 ^ 0;
sbit ADDR1 = P1 ^ 1;
sbit ADDR2 = P1 ^ 2;
sbit ADDR3 = P1 ^ 3;
sbit ENLED = P1 ^ 4;
unsigned char code LedChar[] =
{
0xC0, 0xF9, 0xA4, 0xB0, 0x99,
0x92, 0x82, 0xF8, 0x80, 0x90
};//数码管真值表
unsigned char LedBuff[] =
{
0xff, 0xff, 0xff, 0xff, 0xff, 0xff
};//数码管显示缓冲区
unsigned char i = 0;//动态扫描的索引
unsigned int cnt = 0;//记录T0中断次数
unsigned char flag1s = 0;//1s定时标志
unsigned long sec = 0;//记录经过的秒数
void main(void)
{
//unsigned long sec = 0;//记录经过的秒数
EA = 1;//使能总中断
ENLED = 0;
ADDR3 = 1;//U3 74HC138芯片使能
TMOD = 0x01;//设置定时器T0模式1
TH0 = 0xFC;
TL0 = 0x67;//设置定时器T0的初值
ET0 = 1;//使能定时器T0中断
TR0 = 1;//启动定时器T0
while (1)
{
if (1 == flag1s)//判断1s定时标志
{
flag1s = 0;//1s定时标志清零
sec++;//秒数加1
//设置数码管的值
LedBuff = LedChar;
LedBuff = LedChar[(sec / 10) % 10];
LedBuff = LedChar[(sec / 100) % 10];
LedBuff = LedChar[(sec / 1000) % 10];
LedBuff = LedChar[(sec / 10000) % 10];
LedBuff = LedChar[(sec / 100000) % 10];
}
}
}
void InterruptTimer0() interrupt 1
{
TH0 = 0xFC;
TL0 = 0x67;//设置定时器T0的初值
cnt++;//中断次数+1
if (cnt >= 1000)//中断1000次即1秒
{
cnt = 0;//中断次数清零
flag1s = 1;//设置1s定时标志为1
}
P0 = 0xff;//显示消隐
switch (i)
{
case 0:
ADDR2 = 0;
ADDR1 = 0;
ADDR0 = 0; // 三极管导通
P0 = LedBuff;
i++;
break;
case 1:
i++;
if (sec < 10)
break;
ADDR2 = 0;
ADDR1 = 0;
ADDR0 = 1; // 三极管导通
P0 = LedBuff;
break;
case 2:
i++;
if (sec < 100)
break;
ADDR2 = 0;
ADDR1 = 1;
ADDR0 = 0; // 三极管导通
P0 = LedBuff;
break;
case 3:
i++;
if (sec < 1000)
break;
ADDR2 = 0;
ADDR1 = 1;
ADDR0 = 1; // 三极管导通
P0 = LedBuff;
break;
case 4:
i++;
if (sec < 10000)
break;
ADDR2 = 1;
ADDR1 = 0;
ADDR0 = 0; // 三极管导通
P0 = LedBuff;
break;
case 5:
i = 0;
if (sec < 100000)
break;
ADDR2 = 1;
ADDR1 = 0;
ADDR0 = 1; // 三极管导通
P0 = LedBuff;
break;
default:
break;
}
}
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