51單片機(jī)程序——數(shù)碼管顯示0~99

#define DataPort P0 //定義數(shù)據(jù)端口 程序中遇到DataPort 則用P0 替換

#define CtrlPort P1 //定義控制端口

unsigned char code DuanMa[10]={0xc0,0xf9,0xa4,0xb0, 0x99,0x92,0x82,0xf8,0x80,0x90};// 顯示段碼值0~9

unsigned char code WeiMa[]={0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};//分別對(duì)應(yīng)相應(yīng)的數(shù)碼管點(diǎn)亮,即位碼

unsigned char TempData[8]; //存儲(chǔ)顯示值的全局變量

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

void Display(unsigned char FirstBit,unsigned char Num);

main()

{

unsigned char num;

unsigned int j;

while(1)

{

j++;

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==100) //用于顯示0~99

num=0;

}

TempData[0]=DuanMa[num]; //分解顯示信息，

//如要顯示68，則68/10=6 68=8

TempData[1]=DuanMa[num/10];

Display(0,2);

}

}

void Delay(unsigned int t)

{

while(--t);

}

void Display(unsigned char FirstBit,unsigned char Num)

{

unsigned char i;

for(i=0;i

{

DataPort=0; //清空數(shù)據(jù)，防止有交替重影

CtrlPort=WeiMa[i+FirstBit]; //取位碼

DataPort=TempData[i]; //取顯示數(shù)據(jù)，段碼

Delay(100); // 掃描間隙延時(shí)，時(shí)間太長(zhǎng)會(huì)閃爍，

//太短會(huì)造成重影

}

}