51單片機簡易計算器文件

ID:125235 · 發(fā)表于 2016-6-5 14:08

#include<reg51.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
sbit R=P2^0;
sbit W=P2^1;
sbit E=P2^2;
void show(unsigned long  x );
void delay(unsigned int k);//延時
int keyc();//鍵盤掃描
void init();//LCD初始化
void write_com_1602(unsigned char command);//寫命令
void write_data_1602(unsigned char datum);//寫數(shù)據(jù)
void desplay(unsigned int a);//顯示程序
unsigned int key;
unsigned char anjian(void) ;
void DelayMS(uint x)
{
uchar i;
while(x--)
  for(i=0;i<250;i++);
}
uchar x;
void main()
{
  unsigned  long first,second,c;
  unsigned  long third ;
/// unsigned char flag ;//flag1;
  //first=0;flag=1;
_nop_();
  init();
P1=0x0f;
  while(1)
{
               while(P1==0x0f);
key=anjian();
   if(key<11&&key>=0)
               {

                 first=first*10+key;//key=0;
     desplay(key);//顯示第一位
               // P1=0x0f;
               while(P1!=0x0f);
   delay(130);
   }
                 if(key<17&&key>=13)
            {
            switch (key)
            {
               case 16:  write_data_1602('+'); second=first;  first=0; c=1;
break;
case 15:  write_data_1602('-'); second=first;  first=0; c=2;
break;
case 14:  write_data_1602('*'); second=first;  first=0; c=3;
break;
case 13:  write_data_1602('/'); second=first;  first=0; c=4;
break;
default: break;
               delay(130);
            }
            delay(130);
            }
   if(key==12)
      {
         write_com_1602(0x80+0x40);//給AC送值
         write_data_1602('=');
         // third= first ;
            switch (c)
            {
               case 1: third=second+first;
break;
case 2: third=second-first;
break;
case 3: third =second*first;
break;

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51單片機簡易計算器文件

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