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   源码介绍

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#include <c8051f300.h>                 // SFR declarations

sbit   clk_4002      =    P0^5;
sbit   data_4002     =    P0^4;
sbit   le_4002       =    P0^3;
sbit   LD            =    P0^2;

void OSCILLATOR_Init (void);           
void PORT_Init (void);


void DelayNS(unsigned int  dly)
{  unsigned int  i; 

   for(; dly>0; dly--) 
      for(i=0; i<5; i  );
}

void OSCILLATOR_Init (void)
{
   OSCICN |= 0x03;                     // Configure internal oscillator for
                                       // its maximum frequency (24.5 Mhz)
}

void PORT_Init (void)
{
   P0MDIN |= 0x04;                     // P0.2  are digital

   P0MDOUT = 0x38;                     // P0.2 is open-drain; others are push-pull

   XBR2    = 0x40;                     // Enable crossbar and enable
                                       // weak pull-ups
}


void Write_Data2(long data1) 
{ 
  unsigned char k;
	
  le_4002=0;
	DelayNS(1);
  for(k=0;k<24;k  )
     {
       if(data1&0x800000)
          data_4002=1;
       else
          data_4002=0;
       
       DelayNS(1);
       clk_4002=1;       
       DelayNS(1);
       clk_4002=0;
       
       data1<<=1;
     }
 
  le_4002=1;
  DelayNS(1);
  le_4002=0; 
}

void ADF4002_Ini()
{
    Write_Data2(0x1f8093);
    Write_Data2(0x1f8092);
    Write_Data2(0x000004); // R=1  fpd=10MHz
    Write_Data2(0x000c01); // N=12 RF=120MHz
}

void main (void)
{
   PCA0MD &= ~0x40;                    // WDTE = 0 (clear watchdog timer
                                       // enable)

   PORT_Init();                        // Initialize Port I/O
   OSCILLATOR_Init ();                 // Initialize Oscillator
  
	 DelayNS(50000);
	 ADF4002_Ini();
		
   while (1)
   {
       ;
   }                                   
}