中断与数码管显示

发表于 2022-1-23 19:29:13

一，数组
从概念上讲，数组是具有相同数据类型的有序数据的组合，一般来讲，数组定义后满足
以下三个条件。
1、具有相同的数据类型；
2、具有相同的名字；
3、在存储器中是被连续存放的。

一维数组的声明格式如下：
数据类型数组名 [数组长度];
例如： unsigned char LedChar[16] = {
         0xC0, 0xF9, 0xA4, 0xB0, 0x99, 0x92, 0x82, 0xF8,
         0x80, 0x90, 0x88, 0x83, 0xC6, 0xA1, 0x86, 0x8E
      };   QQ截图20220123191703.png

二，数码管动态显示
999999的倒计时

#include <reg52.h>
sbit P20=P2^0;
sbit P21=P2^1;
sbit P22=P2^2;
sbit ENLED=P1^1;
unsigned char code LedChar[]={
0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,
0x80,0x90,0x88,0x83,0xC6,0xA1,0x86,0x8E
};
unsigned char LedBuff[6]={
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF
};
unsigned char i = 0;
unsigned int cnt = 0;
unsigned char flagls = 0;
signed long sec = 999999;
void main()
{
ENLED = 0;
EA = 1; //打开中断总开关
TMOD = 0x01;
TH0 = 0xF5;
TL0 = 0x56;
ET0 = 1; //设置T0中断
TR0 = 1; //打开T0
while(1)
{
if(flagls==1)
{
flagls=0;
LedBuff[0] = LedChar[sec%10];
LedBuff[1] = LedChar[sec/10%10];
LedBuff[2] = LedChar[sec/100%10];
LedBuff[3] = LedChar[sec/1000%10];
LedBuff[4] = LedChar[sec/10000%10];
LedBuff[5] = LedChar[sec/100000%10];
sec--;
}
}
}
void InterruptTimer0() interrupt 1 //定时器溢出自动进入中断
{
TH0=0xF5;
TL0=0x56; //硬件清零无需TF0=0
cnt++;
if(cnt>=1000)
{
cnt = 0;
flagls=1;
}
P0=0xFF; //显示消隐
switch(i) //加入if else语句使数码管只显示有效位
{
case 0:P22=1;P21=0;P20=1;i++;P0=LedBuff[0];break;
case 1:P22=1;P21=0;P20=0;i++;P0=LedBuff[1];break;
case 2:P22=0;P21=1;P20=1;i++;P0=LedBuff[2];break;
case 3:P22=0;P21=1;P20=0;i++;P0=LedBuff[3];break;
case 4:P22=0;P21=0;P20=1;i++;P0=LedBuff[4];break;
case 5:P22=0;P21=0;P20=0;i=0;P0=LedBuff[5];break;
default:break;
}
}

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高位不显示的计时（定时器T1和中断）

#include <reg52.h>
sbit P20=P2^0;
sbit P21=P2^1;
sbit P22=P2^2;
sbit ENLED=P1^1;
unsigned char code LedChar[]={
0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,
0x80,0x90,0x88,0x83,0xC6,0xA1,0x86,0x8E
};
unsigned char LedBuff[6]={
0xFF,0xFF,0xFF,0xFF,0xFF,0xFF
};
unsigned char i = 0;
unsigned int cnt = 0;
unsigned char flagls = 0;
unsigned long sec = 0;
void main()
{
ENLED = 0;
EA = 1; //打开中断总开关
TMOD = 0x10; //定时器T1
TH1 = 0xF5;
TL1 = 0x56;
ET1 = 1; //设置T1中断
TR1 = 1; //打开T1
while(1)
{
if(flagls==1)
{
flagls=0;
sec++;
LedBuff[0] = LedChar[sec%10];
LedBuff[1] = LedChar[sec/10%10];
LedBuff[2] = LedChar[sec/100%10];
LedBuff[3] = LedChar[sec/1000%10];
LedBuff[4] = LedChar[sec/10000%10];
LedBuff[5] = LedChar[sec/100000%10];
}
}
}
void InterruptTimer0() interrupt 3 //定时器溢出自动进入中断
{
TH1=0xF5;
TL1=0x56; //硬件清零无需TF1=0
cnt++;
if(cnt>=1000)
{
cnt = 0;
flagls=1;
}
P0=0xFF;
switch(i) //加入if else语句使数码管只显示有效位
{
case 0:P22=1;P21=0;P20=1;i++;P0=LedBuff[0];break;
case 1:P22=1;P21=0;P20=0;i++;if(sec>9){P0=LedBuff[1];}else{P0=0xFF;}break;
case 2:P22=0;P21=1;P20=1;i++;if(sec>99){P0=LedBuff[2];}else{P0=0xFF;}break;
case 3:P22=0;P21=1;P20=0;i++;if(sec>999){P0=LedBuff[3];}else{P0=0xFF;}break;
case 4:P22=0;P21=0;P20=1;i++;if(sec>99999){P0=LedBuff[4];}else{P0=0xFF;}break;
case 5:P22=0;P21=0;P20=0;i=0;if(sec>999999){P0=LedBuff[5];}else{P0=0xFF;}break;
default:break;
}
}

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[寒假笔记] 中断与数码管显示