dportram.lst

DSP通过双口RAM和ISP1581实现下位机的USB固件程序

C51 COMPILER V7.06   DPORTRAM                                                              09/09/2005 13:57:32 PAGE 1   


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

stmt level    source

   1          #include <AT89X52.H>
   2          
   3          sbit ramcs=P1^2;
   4          sbit rambusy=P1^3;
   5          
   6          
   7          void WriteRamChar(unsigned int addr,unsigned char wdata)
   8          {
   9   1      unsigned char xdata *exAddress;
  10   1              exAddress = addr;
  11   1              //while(rambusy==0);    
  12   1              *exAddress = wdata;
  13   1              
  14   1      }
  15          
  16          unsigned char ReadRamChar(unsigned int addr)
  17          {
  18   1      unsigned char xdata *exAddress;
  19   1      unsigned char ret;
  20   1              exAddress = addr;
  21   1              //while(rambusy==0);
  22   1              //while(rambusy==0);
  23   1              ret=*(exAddress);
  24   1      return ret;
  25   1              
  26   1      }
  27          
  28          
  29          void init_ram()
  30          {
  31   1      unsigned int i;
  32   1      EA=0;
  33   1      ramcs=0;
  34   1      for(i=0;i<16;i++)
  35   1      WriteRamChar(i,0);
  36   1      ramcs=1;
  37   1      EA=1;
  38   1      }
  39          
  40          unsigned char WriteRam(unsigned char num,unsigned char * buf)
  41          {
  42   1      unsigned char j,i;
  43   1      unsigned char endaddr;
  44   1      if(num<65)
  45   1      {
  46   2      
  47   2      endaddr=num;
  48   2      EA=0;
  49   2      ramcs=0;
  50   2      //WriteRamChar(1,0x55);
  51   2      //WriteRamChar(6,0);
  52   2      
  53   2      for(i=0;i<endaddr;i++)
  54   2      WriteRamChar(i,buf[i]);
  55   2      
C51 COMPILER V7.06   DPORTRAM                                                              09/09/2005 13:57:32 PAGE 2   

  56   2      //WriteRamChar(6,num);
  57   2      ramcs=1;
  58   2      EA=1;
  59   2      j=1;
  60   2      }
  61   1      else
  62   1      j=0;
  63   1      return j;
  64   1      }
  65          
  66          void ReadRam(unsigned char num,unsigned char * buf)
  67          {
  68   1      unsigned char i;
  69   1      unsigned char endaddr;
  70   1      if(num<65)
  71   1      {
  72   2      endaddr=num;
  73   2      EA=0;
  74   2      ramcs=0;
  75   2      for(i=0;i<endaddr;i++)
  76   2      buf[i]=ReadRamChar(i);
  77   2      WriteRamChar(0,0xAA);
  78   2      ramcs=1;
  79   2      EA=1;
  80   2      
  81   2      }
  82   1      }
  83          
  84          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    175    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       8
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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