max531.lst

这是自己编的4*4键盘+1602的程序~验证过

C51 COMPILER V8.02   MAX531                                                                12/01/2008 21:36:30 PAGE 1   


C51 COMPILER V8.02, COMPILATION OF MODULE MAX531
OBJECT MODULE PLACED IN MAX531.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE MAX531.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include<reg52.h>
   2          #define uint unsigned int
   3          #define uchar unsigned char
   4          
   5          void delay1ms(uint);
   6          //uchar keyscan(void);
   7          //void getscan();
   8          /****max531引脚定义***/
   9          sbit din531=P1^0;
  10          sbit clk531=P1^1;
  11          sbit cs531=P1^2;
  12          /***4乘4引脚定义***/
  13          uchar keyascan[2];
  14          uchar wordbuf[6];                               // 字型码缓冲区
  15          uchar count,key;                                        // 位计数
  16          
  17          /*****1602引脚定义***/
  18          sbit RS=P3^7;
  19          sbit RW=P3^6;
  20          sbit EN=P3^5;
  21          //uchar JS[5]={0X30,0X30,':',0X30,0X30};
  22          unsigned char code str1[]={"setdy:"};
  23          unsigned char code str2[]={"nowgl:"};
  24          //unsigned char code str3[]={"OK"};
  25          //unsigned char code str4[]={"HOT"};
  26          //unsigned char code str5[]={"COOL"};
  27          //uchar data disdata[5];
  28          
  29          
  30          
  31          /************MAX531D/A转换************/
  32          void da_out531(uint out_value)
  33          {
  34   1              uchar da_h8,da_l4,i;
  35   1              uint a;
  36   1              a=out_value;
  37   1              da_h8=(uchar)(a>>4)&0x00ff;
  38   1              a=out_value;
  39   1              da_l4=(char)(a<<4)&0x00ff;     
  40   1              cs531=0;
  41   1              for(i=0;i<8;i++)
  42   1              {
  43   2                      clk531=0;
  44   2                      delay1ms(1);
  45   2                      if(da_h8&0x80)din531=1;  
  46   2              else din531=0; 
  47   2                      clk531=1;  
  48   2                      da_h8<<=1;
  49   2              }
  50   1              for(i=0;i<4;i++)
  51   1              {
  52   2                      clk531=0; 
  53   2                      delay1ms(1);
  54   2                      if(da_l4&0x80)
  55   2                              din531=1;  
C51 COMPILER V8.02   MAX531                                                                12/01/2008 21:36:30 PAGE 2   

  56   2              else 
  57   2                              din531=0; 
  58   2                      clk531=1; 
  59   2                      da_l4<<=1;
  60   2              }
  61   1              cs531=1;  
  62   1      }
  63          
  64          /******************延时**********************/
  65          void delay1ms(uint t) //延时1MS
  66          {
  67   1              uchar j;
  68   1              while(t--)
  69   1              {
  70   2                      for(j=0;j<125;j++)
  71   2                      {;}
  72   2              }
  73   1      }
  74          
  75          /*****************4乘4键盘**************/
  76          /* 键扫描函数 */
  77          uchar keyscan(void)
  78          {
  79   1              uchar scancode,tmpcode;
  80   1              P2 = 0xf0;                                                              // 发全0行扫描码
  81   1              if ((P2&0xf0)!=0xf0)                                    // 若有键按下
  82   1              {
  83   2                      delay1ms(2);                                                    // 延时去抖动
  84   2                      if ((P2&0xf0)!=0xf0)                            // 延时后再判断一次，去除抖动影响
  85   2                      {
  86   3                              scancode = 0xfe;
  87   3                              while((scancode&0x10)!=0)               // 逐行扫描
  88   3                              {
  89   4                                      P2 = scancode;                          // 输出行扫描码
  90   4                                      if ((P2&0xf0)!=0xf0)            // 本行有键按下
  91   4                                      {
  92   5                                              tmpcode = (P2&0xf0)|0x0f;
  93   5      
  94   5                                              /* 返回特征字节码，为1的位即对应于行和列 */
  95   5                                              return((~scancode)+(~tmpcode));
  96   5                                      }
  97   4                                      else scancode = (scancode<<1)|0x01;             // 行扫描码左移一位
  98   4                              }
  99   3                      }
 100   2              }
 101   1              return(0);                                                              // 无键按下，返回值为0  
 102   1      }
 103          /* 键盘取值函数*/
 104          void getscan()
 105                {  uchar j,enterflag=0;                   // 确认键按下与否标志
 106   1                    
 107   1                 key = keyscan();                                     // 调用键盘扫描函数
 108   1                      switch(key)
 109   1                      {
 110   2                      case 0x11:                                              // 1行1列，数字0
 111   2                                      if (count<2)
 112   2                                      {
 113   3                                              wordbuf[count] = '0';
 114   3                                              count++;
 115   3      
 116   3                      }
 117   2                              break;
C51 COMPILER V8.02   MAX531                                                                12/01/2008 21:36:30 PAGE 3   

 118   2                              case 0x21:                                              // 1行2列，数字1
 119   2                                      if (count<2)
 120   2                                      {
 121   3                                              wordbuf[count] = '1';
 122   3                                              count++;
 123   3                                      }
 124   2                                      break;                  
 125   2                              case 0x41:                                              // 1行3列，数字2
 126   2                                      if (count<2)
 127   2                                      {
 128   3                                              wordbuf[count] = '2';
 129   3                                              count++;
 130   3                                      }
 131   2                                      break;
 132   2                      case 0x81:                                              // 1行4列，数字3
 133   2                                      if (count<2)
 134   2                                      {
 135   3                                              wordbuf[count]= '3';
 136   3                                              count++;
 137   3                                      }
 138   2                                      break;
 139   2                              case 0x12:                                              // 2行1列，数字4
 140   2                                      if (count<2)
 141   2                                      {
 142   3                                          wordbuf[count] = '4';
 143   3                                              count++;
 144   3                                      }
 145   2                                      break;
 146   2                              case 0x22:                                              // 2行2列，数字5
 147   2                                      if (count<2)
 148   2                                      {
 149   3                                              wordbuf[count]= '5';
 150   3                                              count++;
 151   3                                      }
 152   2                                      break;
 153   2                              case 0x42:                                              // 2行3列，数字6
 154   2                                      if (count<2)
 155   2                                      {
 156   3                                              wordbuf[count]= '6';
 157   3                                              count++;
 158   3                                      }