C51 COMPILER V7.05   WDAC2                                                                 02/14/2006 10:39:08 PAGE 1   


C51 COMPILER V7.05, COMPILATION OF MODULE WDAC2
OBJECT MODULE PLACED IN WDAC2.OBJ
COMPILER INVOKED BY: C:\SiLabs\MCU\IDEfiles\C51\BIN\C51.exe WDAC2.c DB OE

stmt level    source

   1          //參考程序 E :正弦波發(fā)生器程序:WDAC2.c DAC輸出正弦波,DAC輸出更新發(fā)生在寫DAC0H時(shí)
   2          #include <c8051f020.h>                    /*SFR定義*/
   3          #include<math.h>
   4          sfr16 DAC0     = 0xd2;                    /*DAC0數(shù)據(jù)*/
   5          void DAC_Init(void);
   6          void main (void) {
   7   1      unsigned int i;
   8   1      float     y,x;
   9   1         WDTCN = 0xde;                        /*關(guān)看門狗*/
  10   1         WDTCN = 0xad;
  11   1          DAC_Init();                         /*D/A初始化*/
  12   1         while (1) 
  13   1         {                   
  14   2         for(x=0;x<(2*3.14159);x+=0.1)
  15   2      {y=2048*(sin(x)+1);   /*12位ADC的數(shù)字容量為4K(0--0FFFH)y的最大值為4096*/
  16   3      DAC0=y;              /*設(shè)置待轉(zhuǎn)換的值并啟動D/A轉(zhuǎn)換*/
  17   3         //   DAC0H=DAC0H ;    
  18   3         for(i=0;i<=1;i++);   //延時(shí)可改變正弦波周期
  19   3      }
  20   2              }
  21   1      }
  22          void DAC_Init(void)
  23          {
  24   1          REF0CN =0x03;/*內(nèi)部偏壓發(fā)生器和電壓基準(zhǔn)緩沖器工作，基準(zhǔn)從VREF引腳輸出*/
  25   1              DAC0CN |=0x80;/*DAC0允許，DAC輸出更新發(fā)生在寫DAC0H時(shí)*/
  26   1      }


MODULE INFORMATION:   STATIC OVERLAYABLE
   CODE SIZE        =    126    ----
   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)