keyboard.lst

单片机开发板配套52个程序(c语言源代码)

C51 COMPILER V7.06   KEYBOARD                                                              08/05/2010 18:45:35 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE KEYBOARD
OBJECT MODULE PLACED IN keyboard.OBJ
COMPILER INVOKED BY: D:\Program Files\keil\C51\BIN\C51.EXE keyboard.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          /*-----------------------------------------------
   2            名称：矩阵键盘
   3            日期：2009.5
   4            修改：无
   5            内容：通过反转法循环扫描矩阵键盘，并通过数码管显示数据
   6          ------------------------------------------------*/
   7          #include<reg52.h> //包含头文件，一般情况不需要改动，头文件包含特殊功能寄存器的定义
   8          
   9          #define uchar unsigned char
  10          #define uint  unsigned int
  11          
  12          unsigned char const dofly[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,
  13                                                   0x77,0x7c,0x39,0x5e,0x79,0x71};//0-F
  14          /*------------------------------------------------
  15                             函数声明
  16          ------------------------------------------------*/ 
  17          uchar keyscan(void);//键盘扫描
  18          void delay(uint i); //演示程序
  19          /*------------------------------------------------
  20                             主函数
  21          ------------------------------------------------*/
  22          void main()
  23          {
  24   1       uchar key;
  25   1       P2=0x00;        //1数码管亮 按相应的按键，会显示按键上的字符
  26   1       while(1)
  27   1      {
  28   2       key=keyscan();  //调用键盘扫描，
  29   2       switch(key)
  30   2       {
  31   3        case 0x7e:P0=dofly[0];break;//0 按下相应的键显示相对应的码值
  32   3        case 0x7d:P0=dofly[1];break;//1
  33   3        case 0x7b:P0=dofly[2];break;//2
  34   3        case 0x77:P0=dofly[3];break;//3
  35   3        case 0xbe:P0=dofly[4];break;//4
  36   3        case 0xbd:P0=dofly[5];break;//5
  37   3        case 0xbb:P0=dofly[6];break;//6
  38   3        case 0xb7:P0=dofly[7];break;//7
  39   3        case 0xde:P0=dofly[8];break;//8
  40   3        case 0xdd:P0=dofly[9];break;//9
  41   3        case 0xdb:P0=dofly[10];break;//a
  42   3        case 0xd7:P0=dofly[11];break;//b
  43   3        case 0xee:P0=dofly[12];break;//c
  44   3        case 0xed:P0=dofly[13];break;//d
  45   3        case 0xeb:P0=dofly[14];break;//e
  46   3        case 0xe7:P0=dofly[15];break;//f
  47   3       }
  48   2       }
  49   1      }
  50          /*------------------------------------------------
  51                        键盘扫描程序
  52          ------------------------------------------------*/
  53          uchar keyscan(void)  //键盘扫描函数，使用行列反转扫描法
  54          {
  55   1       uchar cord_h,cord_l;//行列值中间变量
C51 COMPILER V7.06   KEYBOARD                                                              08/05/2010 18:45:35 PAGE 2   

  56   1       P3=0x0f;            //行线输出全为0
  57   1       cord_h=P3&0x0f;     //读入列线值
  58   1       if(cord_h!=0x0f)    //先检测有无按键按下
  59   1       {
  60   2        delay(100);        //去抖
  61   2        if(cord_h!=0x0f)
  62   2        {
  63   3          cord_h=P3&0x0f;  //读入列线值
  64   3          P3=cord_h|0xf0;  //输出当前列线值
  65   3          cord_l=P3&0xf0;  //读入行线值
  66   3          return(cord_h+cord_l);//键盘最后组合码值
  67   3         }
  68   2        }return(0xff);     //返回该值
  69   1      }
  70          /*------------------------------------------------
  71                           延时程序
  72          ------------------------------------------------*/
  73          void delay(uint i)  //延时函数
  74          {
  75   1      while(i--);
  76   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    203    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =     16       1
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


C51 COMPILATION COMPLETE.  0 WARNING(S),  0 ERROR(S)