AVR单片机制作计算器

包括Proteus模拟电路图C语言程序

Proteus中的模拟电路：

C语言程序：

#include<mega32.h>

#include<delay.h>

unsigned int put[] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f}; unsigned int key;

unsigned int led_1,led_2,led_3,led_4,fuhao,num,num_1;

interrupt [EXT_INT0]void ext_int0_isr() //按键中断 低电平触发 {

PORTD.4=0;

PORTA = 0x01;

if(PINA.4) key = 16; // 清零

if(PINA.5) key = 3;

if(PINA.6) key = 2;

if(PINA.7) key = 1;

PORTA = 0x02;

if(PINA.4) key = 15; // 等于

包括Proteus模拟电路图C语言程序

if(PINA.5) key = 6;

if(PINA.6) key = 5;

if(PINA.7) key = 4;

PORTA = 0x04;

if(PINA.4) key = 0;

if(PINA.5) key = 9;

if(PINA.6) key = 8;

if(PINA.7) key = 7;

PORTA = 0x08;

if(PINA.4) key = 14; //除法

if(PINA.5) key = 13; //乘法

if(PINA.6) key = 12; //减法

if(PINA.7) key = 11; //加法

delay_ms(20);

PORTA = 0x0f;

}

void xianshi() //数码管显示 函数 {

while(~PIND.1)

{

PORTB = 0x0e;

PORTC = put[led_1];

delay_ms(1);

PORTB = 0x0f;

PORTB = 0x0d;

PORTC = put[led_2];

delay_ms(1);

PORTB = 0x0f;

PORTB = 0x0b;

PORTC = put[led_3];

delay_ms(1);

PORTB = 0x0f;

PORTB = 0x07;

PORTC = put[led_4];

delay_ms(1);

包括Proteus模拟电路图C语言程序

}

}

void jisuan() //加减乘除计算函数 {

switch(fuhao)

{

case 11 : num=num_1+num; break; case 12 : num=num_1-num; break; case 13 : num=num_1*num; break; case 14 : num=num_1/num; break; }

}

void main(void) //主函数 {

DDRB=0x0f;

DDRC=0xff;

DDRD=0xf0;

DDRA=0x0f;

GICR|=0x40;

MCUCR = 0x02;

MCUCSR = 0x00;

GIFR = 0x40;

#asm("sei")

while(1)

{

PORTA = 0x0f;

if(key < 10)

{

num=num*10+key;

led_4 = led_3;

led_3 = led_2;

led_2 = led_1;

led_1 = key;

xianshi();

PORTD.4=1;

}

if(key > 10)

{

led_1=0;

led_2=0;

包括Proteus模拟电路图C语言程序

led_3=0; led_4=0; if(key!=15) {

num_1=num; num=0;

}

if(key==11) {

fuhao=11; xianshi(); PORTD.4=1; }

if(key==12) {

fuhao=12; xianshi(); PORTD.4=1; }

if(key==13) {

fuhao=13; xianshi(); PORTD.4=1; }

if(key==14) {

fuhao=14; xianshi(); PORTD.4=1; }

if(key==16) {

num_1=0; num=0; xianshi(); PORTD.4=1; }

if(key==15) {

jisuan();

led_1 = num%10;

包括Proteus模拟电路图C语言程序

num = num/10;

led_2 = num%10; num = num/10;

led_3 = num%10; num = num/10;

led_4 = num%10; xianshi(); PORTD.4=1; led_1=0; led_2=0; led_3=0; led_4=0; }

}

}

}

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