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標題: 51單片機簡單計算器 [打印本頁]

作者: 2901672092 時間: 2019-7-15 15:33
標題: 51單片機簡單計算器
代碼：
#include <reg51.h>
#include <stdio.h>
#define uchar unsigned char
#define uint unsigned int

unsigned char table[]={0xc0, 0xf9, 0xa4, 0xb0, 0x99, 0x92, 0x82, 0xf8, 0x80, 0x90};
unsigned char pos[]={0x00, 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01};
uint num[10];
uint cnt,flag,num1,num2,op,st;
unsigned long  res;
uint col,row;
/*--------------?óê±10ms×ó3ìDò---------*/
void delay10ms(void)
{
unsigned int TempCyc = 5552*2;
  while(TempCyc--);
}
void update()
{
cnt = 1;
num[cnt] = res % 10;
for (;;)
{
   if (res>10)
   {
  res = res/10;
  cnt++;
  num[cnt] = res % 10;
   }
   else
  break;
}
st = 1;
}
void delay(unsigned int k)
{
unsigned int j;
for (j=0; j<k; j++)
{}
}
void main(void)
{
uchar keyval;
uint i;
cnt = 0;
flag = 0;
num1 = 0;
num2 = 0;
op = 0;
st = 0;
for (;;)
{

   P1 = 0xf0;
   keyval = 0xf0;
   if ((P1&0xf0) != 0xf0)
   {
if (st != 0)
{
   st = 0;
   cnt = 0;
}
keyval = P1^0xf0;
switch (keyval) //col
{
   case (0x10):
  col = 1;
  break;
   case (0x20):
  col = 2;
  break;
   case (0x40):
  col = 3;
  break;
   case (0x80):
  col = 4;
      break;
}
delay10ms();
P1 = 0x0f;
keyval = P1^0x0f;
switch (keyval)
{
   case (0x01):
  row = 1;
  break;
   case (0x02):
  row = 2;
  break;
   case (0x04):
  row = 3;
  break;
   case (0x08):
  row = 4;
      break;
}
if ((col<4 && row<4))  //1~9
{
   cnt++;
   if (flag == 0)
   {
  num1 = num1*10 + 9 - 3*row + col;
  num[cnt] = 9 - 3*row + col;
   }
   else
   {
  num2 = num2*10 + 9 - 3*row + col;
  num[cnt] = 9 - 3*row + col;
   }

}
if (row == 4 && col == 1) //0
{
   if (cnt!=0)
  cnt++;
   if (flag == 0)
   {
  num1 = num1*10;
  if (cnt != 0)
   num[cnt] = 0;
   }

   else
   {
  num2 = num2*10;
  if (cnt != 0)
   num[cnt] = 0;
   }
}
if (row == 4 && col == 2) //C
{
   cnt = 0;
   flag = 0;
   num1 = 0;
   num2 = 0;
   op = 0;
}
if (col == 4)  //option
{
   flag = 1;
   cnt = 0;
   op = row;
}
if (row == 4 && col == 3)    //=
{
   switch (op)
   {
  case (1):
   res = num1+num2;
   update();
   break;
  case (2):
   res = num1-num2;
   update();
   break;
  case (3):
   res = num1*num2;
   update();
   break;
  case (4):
   res = (num1*10/num2+5)/10;
   update();
   break;
   }
   flag = 0;
   num1 = 0;
   num2 = 0;
   op = 0;

  }
  P1 = 0xf0;
  while((P1&0xf0)!=0xf0);
   }
   P2 = 0x00;
   for (i = 1; i <=cnt; i++)
   {
P2 = pos[i];
if (st == 0)
   P0 = table[num[cnt-i+1]];
else
   P0 = table[num[i]];
delay(300);
   }
}

while (1)
   ;
}

2019-07-12_185550.png (174.35 KB, 下載次數: 23)

原理圖

作者: b1gfish 時間: 2019-7-21 11:19
正好需要，謝謝分享

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