wdac2.lst

C8051F系列单片机外围电路功能模块程序

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          //参考程序 E :正弦波发生器程序:WDAC2.c DAC输出正弦波,DAC输出更新发生在写DAC0H时
   2          #include <c8051f020.h>                    /*SFR定义*/
   3          #include<math.h>
   4          sfr16 DAC0     = 0xd2;                    /*DAC0数据*/
   5          void DAC_Init(void);
   6          void main (void) {
   7   1      unsigned int i;
   8   1      float     y,x;
   9   1         WDTCN = 0xde;                        /*关看门狗*/
  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的数字容量为4K(0--0FFFH)y的最大值为4096*/
  16   3      DAC0=y;              /*设置待转换的值并启动D/A转换*/
  17   3         //   DAC0H=DAC0H ;    
  18   3         for(i=0;i<=1;i++);   //延时可改变正弦波周期
  19   3      }
  20   2              }
  21   1      }
  22          void DAC_Init(void)
  23          {
  24   1          REF0CN =0x03;/*内部偏压发生器和电压基准缓冲器工作，基准从VREF引脚输出*/
  25   1              DAC0CN |=0x80;/*DAC0允许，DAC输出更新发生在写DAC0H时*/
  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)