ad9850-1.lst

脉冲发生测试.此程序为AD9850（DDS）直接数字频率合成器C语言源码。用125M的有源晶振

C51 COMPILER V7.10   AD9850_1                                                              08/21/2008 15:14:43 PAGE 1   


C51 COMPILER V7.10, COMPILATION OF MODULE AD9850_1
OBJECT MODULE PLACED IN ad9850-1.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE ad9850-1.c BROWSE DEBUG OBJECTEXTEND

line level    source

   1          //-----------------------函数声明，变量定义--------------------------------------------------------
   2          #include <reg52.h>
   3          #include <intrins.h>
   4          #include <ABSACC.H>             
   5          //-----------------------定义管脚--------------------------------------------------------
   6          #define  data_OUT P1
   7          #define uchar unsigned char
   8          sbit FQ_UD=P2^7;          //AD9850信号更新申请 
   9          sbit W_CLK=P2^6;          //写控制字时钟
  10          sbit WD=P3^3;
  11          uchar CON_word[5]; 
  12          //--------------------------------------------------------------------------------------------------
  13          // 函数名称： init_dds()
  14          // 函数功能： DDS初始化
  15          //--------------------------------------------------------------------------------------------------
  16          void init_dds(void)
  17          {
  18   1         W_CLK=0;
  19   1         FQ_UD=0;
  20   1         W_CLK=1;
  21   1         W_CLK=0;
  22   1         FQ_UD=1;
  23   1         FQ_UD=0;
  24   1      }
  25          
  26          //--------------------------------------------------------------------------------------------------
  27          // 函数名称： WRITE_AD9850
  28          // 函数功能： 将控制字写入AD9850
  29          //--------------------------------------------------------------------------------------------------
  30          void Freq_Adjust(unsigned long value_Freq)
  31           {  
  32   1          uchar i; 
  33   1          unsigned long f;
  34   1          uchar L4,L3,L2,L1,L0; 
  35   1          FQ_UD=0; 
  36   1          f=value_Freq*34.359738368;
  37   1          L0=0x00;
  38   1          L4= f&0x000000ff;
  39   1          L3=(f>>8)&0x000000ff;
  40   1          L2=(f>>16)&0x000000ff;
  41   1          L1=(f>>24)&0x000000ff;
  42   1         CON_word[0]=L0;
  43   1         CON_word[4]=L4;
  44   1         CON_word[3]=L3;
  45   1         CON_word[2]=L2;
  46   1         CON_word[1]=L1;
  47   1           FQ_UD=0;
  48   1           W_CLK=0;
  49   1         for(i=0;i<5;i++)
  50   1       {  
  51   2          data_OUT=CON_word[i];      //送控制字 
  52   2          W_CLK=0;
  53   2              W_CLK=1;                   //上升延
  54   2        }
  55   1       W_CLK=0;
C51 COMPILER V7.10   AD9850_1                                                              08/21/2008 15:14:43 PAGE 2   

  56   1       FQ_UD=1;
  57   1       FQ_UD=0;
  58   1      
  59   1      }
  60          //--------------------------------------------------------------------------------------------------
  61          // 函数名称：main
  62          // 用户主函数
  63          // 函数功能：主函数
  64          //--------------------------------------------------------------------------------------------------
  65          void main()
  66          {   
  67   1              init_dds();
  68   1              FQ_UD=0;
  69   1              Freq_Adjust(15);//输出频率为15Hz
  70   1              TMOD=0x00;
  71   1              TH0=0xC1;TL0=0x10;
  72   1              TR0=1;
  73   1          while(1)
  74   1              {
  75   2                      do{}while(!TF0);
  76   2                      WD=!WD;
  77   2              }
  78   1          while(1);
  79   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    157    ----
   CONSTANT SIZE    =   ----    ----
   XDATA SIZE       =   ----    ----
   PDATA SIZE       =   ----    ----
   DATA SIZE        =      5       5
   IDATA SIZE       =   ----    ----
   BIT SIZE         =   ----    ----
END OF MODULE INFORMATION.


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