key_scan.lst

这是一个我以前用AT89S52单片机做的128-64液晶屏的驱动显示程序

C51 COMPILER V7.50   KEY_SCAN                                                              12/28/2007 10:53:50 PAGE 1   


C51 COMPILER V7.50, COMPILATION OF MODULE KEY_SCAN
OBJECT MODULE PLACED IN key_scan.OBJ
COMPILER INVOKED BY: D:\C51\BIN\C51.EXE key_scan.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include <reg52.h>
   2          #include <intrins.h>
   3          
   4          #define TIMER0_COUNT 1000
   5          #define uchar unsigned char
   6          
   7          
   8          extern void delay(unsigned int ms);
   9          
  10          code uchar key_code[]={0xee,0xed,0xeb,0xe7,      //0.1.2.3.
  11                                                          0xde,0xdd,0xdb,0xd7, //4.5.6.7.
  12                                                          0xbe,0xbd,0xbb,0xb7,  //8.9.a.b.
  13                                                          0x7e,0x7d,0x7b,0x77}; //c.d.e.f.
  14          
  15          code ksp[4]={0xfe,0xfd,0xfb,0xf7};
  16          
  17          
  18          uchar keypad_scan()
  19          {
  20   1              uchar key,i;
  21   1              P1=0xf0;
  22   1              while(P1!=0xf0);
  23   1              do
  24   1              {
  25   2                      for(i=0;i<4;i++)
  26   2                      {
  27   3                              P1=ksp[i];
  28   3                              if(P1!=ksp[i])
  29   3                              {
  30   4                                      delay(20);
  31   4                                      key=P1;
  32   4                                      if(key!=ksp[i])
  33   4                                      {
  34   5                                              P1=0xff;                        //              P1归1
  35   5                                              return(key);
  36   5                                      }
  37   4                              }
  38   3                      }
  39   2              }while(1);
  40   1      }
  41          
  42          
  43          uchar gotkey()
  44          {
  45   1              uchar temp,i;
  46   1              temp=keypad_scan();
  47   1              for(i=0;i<=15;i++)
  48   1              {
  49   2                      if(temp==key_code[i]) return(i);
  50   2              }
  51   1              return(16);
  52   1      }
  53          
  54          
  55          
C51 COMPILER V7.50   KEY_SCAN                                                              12/28/2007 10:53:50 PAGE 2   

  56          
  57          
  58          
  59          
  60          
  61          
  62          /* 
  63                          
  64          void Timer0(void) interrupt 1 using 1
  65          {
  66                  TL0=0x00;
  67          //      TH0=0x25;                                        //     25ms
  68                   TH0=0x01;
  69          //      if(p14==0) {p14_sign=1; EA=0;}
  70          //      else  p14_sign=0;
  71                  if(p15==0) {p15_sign=1; EA=0;}
  72                  if(p16==0) {p16_sign=1; EA=0;}
  73          //      if(p17==0) {p17_sign=1; EA=0;}
  74          //      else  p17_sign=0;
  75          }
  76          
  77          void Timer0_star()
  78          {
  79                  TMOD=0x01;
  80                  TH0=0x4c;
  81                  TL0=0x00;
  82                  EA=1;
  83                  ET0=1;
  84                  TR0=1;
  85          }
  86          
  87          */
  88          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    112    ----
   CONSTANT SIZE    =     24    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       1
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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