disp.lst

keilc关于LM75A温度计的使用例程

C51 COMPILER V7.09   DISP                                                                  11/20/2007 08:45:29 PAGE 1   


C51 COMPILER V7.09, COMPILATION OF MODULE DISP
OBJECT MODULE PLACED IN Disp.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE Disp.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          /*
   2                  Disp.c
   3                  数码管扫描显示驱动程序
   4          */
   5          
   6          
   7          #include <reg51.h>
   8          #include <absacc.h>
   9          
  10          
  11          //定义显示缓冲区（由定时中断程序自动扫描）
  12          unsigned char DispBuf[8];
  13          
  14          
  15          /*
  16          函数：T1INTSVC()
  17          功能：定时器T1的中断服务函数
  18          */
  19          void T1INTSVC() interrupt 3
  20          {
  21   1              code unsigned char com[] = {0x01,0x02,0x04,0x08,0x10,0x20,0x40,0x80};
  22   1              static unsigned char n = 0;
  23   1              TR1 = 0;
  24   1              TH1 = 0xFC;
  25   1              TL1 = 0x66;
  26   1              TR1 = 1;
  27   1              P1 = 0xFF;              //暂停显示
  28   1              XBYTE[0xE800] = ~DispBuf[n];    //更新扫描数据
  29   1              P1 = ~com[n];   //重新显示
  30   1              n++;
  31   1              n &= 0x07;
  32   1      }
  33          
  34          
  35          /*
  36          函数：DispClear()
  37          功能：清除数码管的所有显示
  38          */
  39          void DispClear()
  40          {
  41   1              unsigned char i;
  42   1              for ( i=0; i<8; i++ )
  43   1              {
  44   2                      DispBuf[i] = 0x00;
  45   2              }
  46   1      }
  47          
  48          
  49          /*
  50          函数：DispChar()
  51          功能：在数码管上显示字符
  52          参数：
  53                  x：数码管的坐标位置（0～7）
  54                  c：要显示的字符（仅限十进制数字和减号）
  55          */
C51 COMPILER V7.09   DISP                                                                  11/20/2007 08:45:29 PAGE 2   

  56          void DispChar(unsigned char x, unsigned char c)
  57          {
  58   1              //0123456789的数码管字型数据
  59   1              code unsigned char Tab[] = {0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};
  60   1              x &= 0x07;
  61   1              x = 7 - x;
  62   1              if ( c == '-' )
  63   1              {
  64   2                      DispBuf[x] = 0x40;
  65   2              }
  66   1              else if ( ( c >= '0' ) && ( c <= '9' ) )
  67   1              {
  68   2                      DispBuf[x] = Tab[c-'0'];
  69   2              }
  70   1      }
  71          
  72          
  73          /*
  74          函数：DispStr()
  75          功能：在数码管上显示字符串
  76          参数：
  77                  x：数码管的坐标位置（0～7）
  78                  *s：要显示的字符串（字符仅限十进制数字和减号）
  79          */
  80          void DispStr(unsigned char x, unsigned char *s)
  81          {
  82   1              unsigned char c;
  83   1              for (;;)
  84   1              {
  85   2                      c = *s;
  86   2                      if ( c == '\0' ) break;
  87   2                      s++;
  88   2                      DispChar(x,c);
  89   2                      x++;
  90   2              }
  91   1      }
  92          
  93          
  94          /*
  95          函数：DispDotOn()
  96          功能：显示指定位的小数点
  97          参数：x为数码管坐标
  98          */
  99          void DispDotOn(unsigned char x)
 100          {
 101   1              DispBuf[7-x] |= 0x80;
 102   1      }
 103          
 104          
 105          /*
 106          函数：DispInit()
 107          功能：数码管扫描显示初始化
 108          */
 109          void DispInit()
 110          {
 111   1              DispClear();
 112   1              EA = 0;
 113   1              TMOD &= 0x0F;
 114   1              TMOD |= 0x10;
 115   1              TH1 = 0xFC;
 116   1              TL1 = 0x66;
 117   1              TR1 = 1;
C51 COMPILER V7.09   DISP                                                                  11/20/2007 08:45:29 PAGE 3   

 118   1              ET1 = 1;
 119   1              EA = 1;
 120   1      }
 121          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    177    ----
   CONSTANT SIZE    =     18    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      9       1
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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