lesson5_3.lst

键盘的分类 键盘分编码键盘和非编码键盘。键盘上闭合键的识别由专用的硬件编码器实现

C51 COMPILER V6.12  LESSON5_3                                                              07/26/2007 08:41:08 PAGE 1   


C51 COMPILER V6.12, COMPILATION OF MODULE LESSON5_3
OBJECT MODULE PLACED IN .\lesson5_3.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE .\lesson5_3.c DEBUG OBJECTEXTEND

stmt level    source

   1          #include<reg52.h>
   2          #define uint unsigned int
   3          #define uchar unsigned char
   4          sbit dula=P2^6;
   5          sbit wela=P2^7;
   6          sbit key1=P3^4;
   7          uchar code table[]={
   8          0x3f,0x06,0x5b,0x4f,
   9          0x66,0x6d,0x7d,0x07,
  10          0x7f,0x6f,0x77,0x7c,
  11          0x39,0x5e,0x79,0x71,0};
  12          uchar num,temp,num1;
  13          void delay(uint z)
  14          {
  15   1      	uint x,y;
  16   1      	for(x=z;x>0;x--)
  17   1      		for(y=110;y>0;y--);
  18   1      }
  19          uchar keyscan();
  20          void display(uchar aa);
  21          void main()
  22          {
  23   1      	num=17;
  24   1      	dula=1;
  25   1      	P0=0;
  26   1      	dula=0;
  27   1      	wela=1;
  28   1      	P0=0xc0;
  29   1      	wela=0;
  30   1      	
  31   1      	while(1)
  32   1      		{
  33   2      			display(keyscan());
  34   2      		}
  35   1      }
  36          void display(uchar aa)
  37          {
  38   1      			dula=1;
  39   1      			P0=table[aa-1];
  40   1      			dula=0;		
  41   1      }
  42          uchar keyscan()
  43          {
  44   1      			P3=0xfe;
  45   1      			temp=P3;
  46   1      			temp=temp&0xf0;
  47   1      			while(temp!=0xf0)
  48   1      				{
  49   2      					delay(5);
  50   2      					temp=P3;
  51   2      					temp=temp&0xf0;
  52   2      					while(temp!=0xf0)
  53   2      					{
  54   3      						temp=P3;
  55   3      					switch(temp)
C51 COMPILER V6.12  LESSON5_3                                                              07/26/2007 08:41:08 PAGE 2   

  56   3      						{
  57   4      							case 0xee:num=1;
  58   4      								break;
  59   4      							case 0xde:num=2;
  60   4      								break;
  61   4      							case 0xbe:num=3;
  62   4      								break;
  63   4      							case 0x7e:num=4;
  64   4      								break;
  65   4      						}
  66   3      					while(temp!=0xf0)
  67   3      						{
  68   4      							temp=P3;
  69   4      							temp=temp&0xf0;
  70   4      						}
  71   3      					}
  72   2      				}
  73   1      
  74   1      			P3=0xfd;
  75   1      			temp=P3;
  76   1      			temp=temp&0xf0;
  77   1      			while(temp!=0xf0)
  78   1      				{
  79   2      					delay(5);
  80   2      					temp=P3;
  81   2      					temp=temp&0xf0;
  82   2      					while(temp!=0xf0)
  83   2      					{
  84   3      						temp=P3;
  85   3      					switch(temp)
  86   3      						{
  87   4      							case 0xed:num=5;
  88   4      								break;
  89   4      							case 0xdd:num=6;
  90   4      								break;
  91   4      							case 0xbd:num=7;
  92   4      								break;
  93   4      							case 0x7d:num=8;
  94   4      								break;
  95   4      						}
  96   3      					while(temp!=0xf0)
  97   3      						{
  98   4      							temp=P3;
  99   4      							temp=temp&0xf0;
 100   4      						}
 101   3      					}
 102   2      				}
 103   1      
 104   1      
 105   1      			P3=0xfb;
 106   1      			temp=P3;
 107   1      			temp=temp&0xf0;
 108   1      			while(temp!=0xf0)
 109   1      				{
 110   2      					delay(5);
 111   2      					temp=P3;
 112   2      					temp=temp&0xf0;
 113   2      					while(temp!=0xf0)
 114   2      					{
 115   3      						temp=P3;
 116   3      					switch(temp)
 117   3      						{
C51 COMPILER V6.12  LESSON5_3                                                              07/26/2007 08:41:08 PAGE 3   

 118   4      							case 0xeb:num=9;
 119   4      								break;
 120   4      							case 0xdb:num=10;
 121   4      								break;
 122   4      							case 0xbb:num=11;
 123   4      								break;
 124   4      							case 0x7b:num=12;
 125   4      								break;
 126   4      						}
 127   3      					while(temp!=0xf0)
 128   3      						{
 129   4      							temp=P3;
 130   4      							temp=temp&0xf0;
 131   4      						}
 132   3      					}
 133   2      				}
 134   1      
 135   1      
 136   1      			P3=0xf7;
 137   1      			temp=P3;
 138   1      			temp=temp&0xf0;
 139   1      			while(temp!=0xf0)
 140   1      				{
 141   2      					delay(5);
 142   2      					temp=P3;
 143   2      					temp=temp&0xf0;
 144   2      					while(temp!=0xf0)
 145   2      					{
 146   3      						temp=P3;
 147   3      					switch(temp)
 148   3      						{
 149   4      							case 0xe7:num=13;
 150   4      								break;
 151   4      							case 0xd7:num=14;
 152   4      								break;
 153   4      							case 0xb7:num=15;
 154   4      								break;
 155   4      							case 0x77:num=16;
 156   4      								break;
 157   4      						}
 158   3      					while(temp!=0xf0)
 159   3      						{
 160   4      							temp=P3;
 161   4      							temp=temp&0xf0;
 162   4      						}
 163   3      					}
 164   2      				}
 165   1      return num;
 166   1      
 167   1      }
 168          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    406    ----
   CONSTANT SIZE    =     17    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      3    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.

C51 COMPILER V6.12  LESSON5_3                                                              07/26/2007 08:41:08 PAGE 4   


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