數(shù)碼管顯示部分電路圖
51單片機(jī)程序代碼：
#include<reg51.h>
#define UCHAR unsigned char
#define UINT unsigned int
sbit KEY=P3^2;
UCHAR table[16] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
UINT conter;
void inittime(void)
{
KEY=1;
conter=0;
TMOD=0x09;
TH0=0X00;
TL0=0X00;
EA=1;
ET0=1;
TR0=0;
}
void Delay_1ms(UCHAR i)//1ms延時
{
UCHAR x,j;
for(j=0;j<i;j++)
for(x=0;x<=148;x++);
}
void segdisplay(void)
{
P0 = 0; //消隱
P2 = 4; //第7位數(shù)碼管顯示
P0 = table[(conter / 10000)%10]; //在這里取 i 的十位數(shù)
Delay_1ms(5); //延時0.5秒后顯示下一個數(shù)
P0 = 0; //消隱
P2 = 5; //第8位數(shù)碼管顯示
P0 = table[conter /100% 10]; //在這里取 i 的個位數(shù)
Delay_1ms(5);
P0 = 0; //消隱
P2 = 6; //第7位數(shù)碼管顯示
P0 = table[(conter / 10)%10]; //在這里取 i 的十位數(shù)
Delay_1ms(5); //延時0.5秒后顯示下一個數(shù)
P0 = 0; //消隱
P2 = 7; //第8位數(shù)碼管顯示
P0 = table[conter % 10]; //在這里取 i 的個位數(shù)
Delay_1ms(5);
P0=0;
}
void main()
{
inittime();
while(1)
{
segdisplay();
if(KEY==1)
TR0=0;
if(KEY==0)
TR0=1;
conter=TH0*256+TL0;
}
}