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標(biāo)題: 單片機(jī)完整代碼 [打印本頁]

作者: 17861627040 時(shí)間: 2018-12-5 10:54
標(biāo)題: 單片機(jī)完整代碼
#include <reg52.h>
#include <intrins.h>
sbit datacs = P2 ^ 6;
sbit chipcs = P2 ^ 7;
char i = 100;
unsigned char j, k;
sbit row1 = P2 ^ 5;          //行端口定義
sbit row2 = P2 ^ 4;
sbit row3 = P2 ^ 3;
sbit row4 = P2 ^ 2;
sbit col1 = P1 ^ 7;          //列端口定義
sbit col2 = P1 ^ 6;
sbit col3 = P2 ^ 0;
sbit col4 = P2 ^ 1;
long x = 0, y = 0, z = 0; //z=x+y or z=x-y
unsigned char oper;//+-*/
bit flag = 0;
unsigned char code table[] = {0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d,
                           0x07, 0x7f, 0x6f, 0x77, 0x7c, 0x39, 0x5e, 0x79, 0x71
                           }; //共陰數(shù)碼管顯示段碼0~9
void add()
{
z = x + y;
}
void sub()
{
z = x - y;
}
long pw(unsigned char n,unsigned char m)
{
long x=1;
while(m--)
{
      x*=n;
}
return x;
}
void display(long num)
{
unsigned char l = 0x7f;
unsigned char n = 0;
unsigned char temp;
long x = 0;
/*
如何判斷數(shù)字位數(shù)？
*/
if(num == 0)
{
      n = 1;
}
else
{
      x = num;
      while (x)
      {
         x = x / 10;
         n++;
      }
}
for (i = n - 1; i >= 0; i--)
{
  long p = pw(10, i + 1);
  long q = pw(10 , i);
      temp = num %  p / q;
      P0 = table[temp];
      //P1=0xff;
      datacs = 1;
      datacs = 0;
      P0 = _cror_(l, i);
      chipcs = 1;
      chipcs = 0;
}
}
void display_num()
{
if (flag)
{
      display(z);//當(dāng)摁下了等于號，顯示Z值
}
else
{
      if (!oper)
      {
         display(x);//當(dāng)沒有摁下等于號，也沒摁下運(yùn)算符，顯示x
      }
      else
      {
         display(y);//當(dāng)沒摁下等于號，但是摁下了運(yùn)算符，顯示y
      }
}
}
/*數(shù)碼管顯示函數(shù)*/
/*
例：num = 123
bai = num % 1000 / 100 = 1；
shi = num % 100 / 10 = 2；
ge = num % 10 = 3；
例2：num = 1234；
qian = num % 10000/ 1000 = 1；
bai = num % 1000 / 100 = 2;
shi = num % 100 / 10 = 3;
ge = num % 10 / 1= 4；
例3：num = 12345；
wan = num % 100000/ 10000 = 1；
qian = num % 10000 / 1000 = 2；
bai = num % 1000 / 100 = 3;
shi = num % 100 / 10 = 4;
ge = num % 10 / 1= 5；
*/
void fuzhi(unsigned char num)
{
//判斷條件是什么呢？
//是否有操作符，也就是oper是否為0
//如果oper為0，則沒有摁下操作符，則將值賦給x
//如果oper不為0，則摁下操作符，將值賦給x
if (!oper)
{
      //為什么是x*10+7
      //第一次摁7鍵，x=7
      //第二次摁7鍵，x=77，即7*10+7
      //第三次摁7鍵，x=777，即77*10+7
      x = x * 10 + num;//
}
else
{
      y = y * 10 + num;
}
while ((P2 & 0x3c) != 0x3c);
}
/*按鍵掃描函數(shù)*/
void keyScan()
{
unsigned char temp;
//P3=0x00;
col1 = 0; col2 = 1; col3 = 1; col4 = 1;
temp = P2 & 0x3f;
if (col1 == 0)
{
      //假設(shè)第一列有按鍵
      if (temp != 0x3f)
      {
         //沒有按鍵退出這次對第一列鍵盤掃描
         temp = P2 & 0x3C;
         switch (temp)
         {
         case 0x38:
            fuzhi(0);
            break; //’0’鍵被按下時(shí)導(dǎo)通，則對應(yīng)端口變?yōu)榈碗娖?br />          case 0x34:
fuzhi(1);
            return;
            break;
         case 0x2C:
fuzhi(4);
            return;
            break;
         case 0x1C:
fuzhi(7);
            return;
            break;
         }
      }
}
col1 = 1; col2 = 0; col3 = 1; col4 = 1;
temp = P2;
temp = temp & 0x3f;
if (col2 == 0)
{
      if (temp != 0x3f)
      {
         temp = P2 & 0x3C;
         switch (temp)
         {
         case 0x38:
            return;
            break;
         case 0x34:
fuzhi(2);
            return;
            break;
         case 0x2C:
fuzhi(5);
            return;
            break;
         case 0x1C:
fuzhi(8);
            return;
            break;
         }
      }
}
col1 = 1; col2 = 1; col3 = 0; col4 = 1;
temp = P2;
temp = temp & 0x3f;
if (temp != 0x3f)
{
      temp = P2 & 0x3C;
      switch (temp)
      {
      case 0x38:

         //為什么用switch？
         //判斷是加號還是減號
         switch (oper)
         {
            case 1:
                  add();
                  return;
                  break;
            case 2:
                  sub();
                  return;
                  break;
            default:
                  return;
                  break;
         }
         break; //’0’鍵被按下時(shí)導(dǎo)通，則對應(yīng)端口變?yōu)榈碗娖?br />       case 0x34:
         fuzhi(3);
         return;
         break;
      case 0x2C:
         fuzhi(6);
         return;
         break;
      case 0x1C:
         fuzhi(9);
         return;
         break;
      }
}
col1 = 1; col2 = 1; col3 = 1; col4 = 0;
temp = P2;
temp = temp & 0x3f;
if (temp != 0x3f)
{
      temp = P2 & 0x3C;
      switch (temp)
      {
      case 0x38:
         oper = 1;//操作符為+
         return;
         break; //’0’鍵被按下時(shí)導(dǎo)通，則對應(yīng)端口變?yōu)榈碗娖?br />       case 0x34:
         oper = 2;
         return;
         break;
      case 0x2C:
oper = 3;
         return;
         break;
      case 0x1C:
         return;
         break;
      }
}
}

void main()
{
datacs = 0;
chipcs = 0;
// P1=0xff;
while (1)
{
      P3 = 0xff;
      keyScan();
      display_num();
}
}

作者: admin 時(shí)間: 2018-12-5 18:40
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