24c02.lst

这是一个用于视频切换的控制程序,采用AT89C51芯片,KEIL 51开发

C51 COMPILER V7.01  24C02                                                                  10/15/2004 15:20:38 PAGE 1   


C51 COMPILER V7.01, COMPILATION OF MODULE 24C02
OBJECT MODULE PLACED IN 24C02.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE 24C02.C BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          #define uchar unsigned char
   2          #define uint unsigned int
   3          #include "reg52.h"
   4          #include "stdio.h"
   5          #include "absacc.h"
   6          #include "main.h"
   7          #include "INTRINS.H"
   8          
   9          uchar x24c02_read(uchar address);  //从24c02的地址address中读取一个字节数据
  10          void x24c02_write(uchar address,uchar info);  //向24c02的address地址中写入一字节数据info
  11          void x24c02_init();   //24c02初始化子程序
  12          void delay1(uchar x);
  13          void flash();
  14          void x24c01_init();
  15          void start();
  16          void stop();
  17          void writex(uchar j);
  18          uchar readx();
  19          void clock();
  20          void delay1(uchar x)
  21          {
  22   1         uint i;
  23   1         for(i=0;i<x;i++);
  24   1         DOG=~DOG;
  25   1      }
  26          void flash(void)
  27          {
  28   1         _nop_();
  29   1         _nop_();
  30   1      }
  31          void x24c02_init()
  32          {
  33   1         scl=1; flash(); sda=1; flash();
  34   1      }
  35          void start()
  36          {
  37   1         sda=1; flash(); scl=1; flash(); sda=0; flash(); scl=0; flash();
  38   1      }
  39          void stop()
  40          {
  41   1         sda=0; flash(); scl=1; flash(); sda=1; flash();
  42   1      }
  43          void writex(uchar j)
  44          {
  45   1         uchar i,temp;
  46   1         temp=j;
  47   1         for (i=0;i<8;i++){
  48   2            temp=temp<<1; scl=0; flash(); sda=CY; flash(); scl=1; flash();
  49   2         }
  50   1         scl=0; flash(); sda=1; flash();
  51   1      }
  52          uchar readx()
  53          {
  54   1         uchar i,j,k=0;
  55   1         scl=0; flash(); sda=1;
C51 COMPILER V7.01  24C02                                                                  10/15/2004 15:20:38 PAGE 2   

  56   1         for (i=0;i<8;i++){
  57   2            flash(); scl=1; flash();
  58   2            if (sda==1) j=1;
  59   2            else j=0;
  60   2            k=(k<<1)|j; scl=0;
  61   2         }
  62   1         flash(); return(k);
  63   1      }
  64          void clock()
  65          {
  66   1         uchar i=0;
  67   1         scl=1; flash();
  68   1         while ((sda==1)&&(i<255))i++;
  69   1         scl=0; flash();
  70   1      }
  71          uchar x24c02_read(uchar address)
  72          {
  73   1         uchar i;
  74   1         start(); writex(0xa0);
  75   1         clock(); writex(address);
  76   1         clock(); start();
  77   1         writex(0xa1); clock();
  78   1         i=readx(); stop();
  79   1         delay1(10);
  80   1         return(i);
  81   1      }
  82          void x24c02_write(uchar address,uchar info)
  83          {
  84   1         EA=0;
  85   1         start(); writex(0xa0);
  86   1         clock(); writex(address);
  87   1         clock(); writex(info);
  88   1         clock(); stop();
  89   1         EA=1;
  90   1         delay1(50);
  91   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    237    ----
   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)