sram_cpld3.lst

单片机与cpld总线方式通信

C51 COMPILER V7.06   SRAM_CPLD3                                                            08/18/2005 18:42:03 PAGE 1   


C51 COMPILER V7.06, COMPILATION OF MODULE SRAM_CPLD3
OBJECT MODULE PLACED IN Sram_cpld3.OBJ
COMPILER INVOKED BY: d:\Keil\C51\BIN\C51.EXE Sram_cpld3.c BROWSE DEBUG OBJECTEXTEND

stmt level    source

   1          /*mcu向通过fpga控制ram，写入时候，给地址a0ff分两次先后送如1和0，fpga向ram写入一定数据
   2          单片机从读数据时候，先向a0fe送入ram读取首地址，接着可以从此口读出数据 
   3          //*7218在硬件译码的时候，低四位数据进行译码，最高位控制小数点，其余三位无效*/
   4          // distab保存要显示的8位数据（每一位为一个字节）
   5          // ledtab为7218软件译码字型表 /dp,a,b,c,e,g,f,d
   6          #include<reg52.h>
   7          //#include<intrins.h>
   8          #include<absacc.h>
   9          #define DisCmd XBYTE [0xC100]                     //7218控制字地址
  10          #define DisData XBYTE [0xC000]                    //7218数据口地址
  11          #define scode 0xb0                                //7218软件译码方式命令字
  12          #define bcode 0x90                                //B码译码方式命令字
  13          #define hexcode 0xd0                              //软件译码方式命令字
  14          #define unchar  unsigned char 
  15          #define unint  unsigned int
  16          sbit P3_0=P3^0;
  17          sbit P1_0=P1^0;
  18          bit  enter=0;
  19          unchar keynum;                                       //按键号 
  20          unchar ledcursor=7;                                  //保存光标当前位置
  21          unchar distab[8]={0x10,0x10,0x10,0x10,0x10,0x10,0x10,0x10} ; // 要显示的内容 hello-pp
  22          unchar temp[8];
  23          unchar code ledtab[]={ 0xfb,0xb0,0xed,0xf5,0xb6,0xd7,0xdf,0xf0,
  24                               //0,  1,   2,   3,   4,   5,   6,  7 
  25                               0xff,0xf7,0xfe,0x9f,0xcb,0xbd,0xcf,0xce,
  26                               //8    9   ,a   ,b    c    d    e    f  
  27                               0x80,0xbe,0x8b,0xee,0x84,0xca,0xf6,0x00, 
  28                              //灭   H    L    P    -   r     q    .
  29                                                   0xb7,0xbb,0xfa};
  30                                                  //y,   u   n
  31          unchar xdata * cpld;                                           // ram读取首地址
  32          //***************************************************************************************    
  33           //void KeyprgF1(void){}
  34          // void KeyprgF2(void ){}
  35           //void KeyprgClear(void){}
  36           //void KeyprgEnter(void){} 
  37           //***************************************************************************************  
  38                  
  39          void display()
  40          {
  41   1         unchar i;   
  42   1         DisCmd=scode;             //采用软件译码
  43   1         for(i=0;i<8;i++)         //将distab中的数据送如7218
  44   1         {
  45   2           DisData =ledtab[distab[i]]; //查表转化并将字型送入7218
  46   2              
  47   2         }
  48   1         
  49   1      }
  50          void main()
  51          {  
  52   1         unint i;
  53   1         //EX0=1;
  54   1         //EA=1;
  55   1        // display();
C51 COMPILER V7.06   SRAM_CPLD3                                                            08/18/2005 18:42:03 PAGE 2   

  56   1         while(1)
  57   1      {
  58   2          i=30000;
  59   2          cpld=0x4000;
  60   2          distab[2]=(*cpld)/100;
  61   2          distab[1]=((*cpld)%100)/10;
  62   2          distab[0]=((*cpld)%100)%10;
  63   2          display();
  64   2          while(--i);
  65   2      }
  66   1        
  67   1       }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =     86    ----
   CONSTANT SIZE    =     27    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =     20    ----
   IDATA SIZE       =   ----    ----
   BIT SIZE         =      1    ----
END OF MODULE INFORMATION.


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