7279.lst

单片机控制按键显示芯片HD7279A

C51 COMPILER V7.50   7279                                                                  07/03/2008 13:28:28 PAGE 1   


C51 COMPILER V7.50, COMPILATION OF MODULE 7279
OBJECT MODULE PLACED IN 7279.OBJ
COMPILER INVOKED BY: D:\Program Files\KeilC\C51\BIN\C51.EXE 7279.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include "7279.h"
   2          //#include <intrins.h>
   3          
   4          //////短延时//////
   5          void shortdelay()//8us
   6          {
   7   1              //_nop_();_nop_();_nop_();_nop_();
   8   1              //_nop_();_nop_();
   9   1              uchar i;
  10   1              for(i=0;i<8;i++);
  11   1      }
  12          //////长延时//////
  13          void longdelay()//48us//50us
  14          {
  15   1              //shortdelay();shortdelay();shortdelay();shortdelay();
  16   1              //shortdelay();shortdelay();
  17   1              //_nop_();_nop_();
  18   1              uchar i;
  19   1              for(i=0;i<0x30;i++);
  20   1      }
  21          //////发送一个字节到HD7279A，高位在前//////
  22          void send7279(uchar ch)
  23          {
  24   1              uchar i=8;
  25   1              CS=0;
  26   1              longdelay();
  27   1              while(i--)
  28   1              {       
  29   2                      DAT=(bit)(ch & 0x80);
  30   2                      ch<<=1;
  31   2                      CLK=1;
  32   2                      shortdelay();
  33   2                      CLK=0;
  34   2                      shortdelay();
  35   2              }
  36   1              DAT=0;
  37   1      }
  38          //////从HD7279A接收一个字节，高位在前//////
  39          uchar receive7279()
  40          {
  41   1              uchar i=8;
  42   1              uchar rect=0;
  43   1              DAT=1;
  44   1              longdelay();
  45   1              while(i--)
  46   1              {
  47   2                      CLK=1;
  48   2                      shortdelay();
  49   2                      rect<<=1;
  50   2                      if(DAT==1)
  51   2                              rect=rect+1;
  52   2                      CLK=0;//注意
  53   2                      shortdelay();
  54   2              }
  55   1              DAT=0;  
C51 COMPILER V7.50   7279                                                                  07/03/2008 13:28:28 PAGE 2   

  56   1              return rect;
  57   1      }
  58          //////写入命令和数据//////
  59          void write7279(uchar cmd,uchar dta)
  60          {
  61   1              send7279(cmd);
  62   1              send7279(dta);
  63   1      }
  64          //////写入命令，读出数据//////
  65          uchar read7279(uchar cmd)
  66          {
  67   1              send7279(cmd);
  68   1              return(receive7279());
  69   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    109    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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