数码管的驱动-EDA365

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数码管的驱动

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#include //包含单片机内部资源预定义

#include "DelayMs.h"

__CONFIG(0x3B31);

//定义常数0-9的数据表格

const unsigned char TABLE[] = {0x3f,0x6,0x5b,0x4f,0x66,0x6d,0x7c,0x7,0x7f,0x6f};

void Display(unsigned char num,unsigned char data)

{

PORTD = TABLE[data]; //取出数据，送D口显示

PORTC = 0x01;

switch(num)

{

case 0:

PORTA = 0x01;

break;

case 1:

PORTA = 0x02;

break;

case 2:

PORTA = 0x04;

break;

case 3:

PORTA = 0x06;

break;

case 4:

PORTA = 0x08;

break;

case 5:

PORTA = 0x0A;

break;

case 6:

PORTA = 0x0C;

break;

case 7:

PORTA = 0x0E;

break;

default:

PORTA = 0x00;

}

DelayMs(1);

}

/*void main()

{

unsigned char i;

TRISD = 0; //portd 输出

TRISA = 0; //porta 输出

TRISC = 0; //porta 输出

PORTC = 0x01; //74HC138控制端口

while (1) //死循环，让数码管持续点亮

{

for(i=0;i<8;i++)

{

Display(i,i+1);

DelayMs(3);

}

关键字：数码管驱动内部资源

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