以下代碼在8個(gè)數(shù)碼管上同時(shí)依次顯示從0～F，利用i，j，m三個(gè)變量來(lái)實(shí)現(xiàn)顯示的控制。

#include

sbit LATCH1=P2^2;
sbit LATCH2=P2^3;

unsigned char code DuanMa[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};// 顯示段碼值0~F
unsigned char code WeiMa[]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};//分別對(duì)應(yīng)相應(yīng)的數(shù)碼管點(diǎn)亮,即位碼

void Delay(unsigned int t); //函數(shù)聲明

main()
{
unsigned char i=0,num;
unsigned int j;
while(1)
{
P1=WeiMa[i]; //取位碼
LATCH2=1; //位鎖存
LATCH2=0;

P1=DuanMa[num+i]; //取顯示數(shù)據(jù)，段碼
LATCH1=1; //段鎖存
LATCH1=0;

Delay(200); // 掃描間隙延時(shí)
i++;
j++;
if(i==8) //檢測(cè)8位掃描完全結(jié)束？如掃描完成則從第一個(gè)開(kāi)始再次掃描8位
i=0;
if(j==500) //檢測(cè)當(dāng)前數(shù)值顯示了一小段時(shí)間后，需要顯示的數(shù)值加1，實(shí)現(xiàn)數(shù)據(jù)顯示的變化
{
j=0;
num++;
if(num==9)
num=0;
}
}
}

void Delay(unsigned int t)
{
while(--t);
}