dds.lst

AD9850串行驱动程序,使用51单片机,通过修改宏,能方便地对DDS进行配置!

C51 COMPILER V8.08   DDS                                                                   06/06/2008 15:29:29 PAGE 1   


C51 COMPILER V8.08, COMPILATION OF MODULE DDS
OBJECT MODULE PLACED IN dds.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE dds.C BROWSE DEBUG OBJECTEXTEND

line level    source

   1          #include"reg52.h"
   2          #define uchar unsigned char
   3          sbit clk  = P1^3;
   4          sbit load = P1^4;
   5          sbit dat  = P1^5;
   6          
   7          void init_dds(void)
   8          {
   9   1              clk=0;
  10   1              load=0;
  11   1              clk=1;
  12   1              clk=0;
  13   1              load=1;
  14   1              load=0;
  15   1      }
  16          
  17          void write_dds(unsigned long dds)
  18          {
  19   1              uchar i;
  20   1              load=0;
  21   1              clk=0;
  22   1              for(i=0;i<40;i++)
  23   1              {
  24   2                      clk=0;
  25   2                      if(dds & 0x00000001)
  26   2                      dat=1;
  27   2                      else dat=0;
  28   2                      clk=1;
  29   2                      dds=dds>>1;
  30   2              }
  31   1              load=1;
  32   1              clk=0;
  33   1              load=0;
  34   1      }
  35          
  36          void write_freq(unsigned long freq)
  37          {
  38   1              unsigned long dds;
  39   1              dds=34.35943*freq;
  40   1              write_dds(dds);
  41   1      }
  42          
  43          
  44          
  45          void main()
  46          {
  47   1              init_dds();
  48   1              write_freq(500000);
  49   1              write_freq(500000); 
  50   1              while(1)
  51   1              {
  52   2              }
  53   1              
  54   1      }
  55          
C51 COMPILER V8.08   DDS                                                                   06/06/2008 15:29:29 PAGE 2   

  56          
  57          


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    117    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =   ----       4
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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