9851.c

AD9851的驱动程序

#include <mega16.h>
#include <delay.h>
//------------端口操作宏定义------------------//
#define  W_CLK       PORTD.0
#define  FQ_UD       PORTD.1
#define  RSET        PORTD.2
#define  WDATA           PORTC
unsigned long f_freq;
unsigned int  p_phase;
void updatedds()
{
 FQ_UD=0;
 W_CLK=0;
 WDATA=p_phase<<3;
 WDATA|=0x01;
 W_CLK=1;
 W_CLK=0;
 WDATA=(f_freq>>24)&0xff;
 W_CLK=1;
 W_CLK=0;
 WDATA=(f_freq>>16)&0xff;
 W_CLK=1;
 W_CLK=0;
 WDATA=(f_freq>>8)&0xff;
 W_CLK=1;
 W_CLK=0;
 WDATA=f_freq&0xff;
 W_CLK=1;
 FQ_UD=1;
 W_CLK=0;
}

void sendfreq(unsigned long freq)
{
 FQ_UD=0;
 f_freq=freq*29.826162;
 updatedds();
 FQ_UD=1;
 FQ_UD=0;
}

void sendphase(unsigned int phase)
{
 FQ_UD=0;
 p_phase=phase;
 updatedds();
 FQ_UD=1;
 FQ_UD=0;
}

void main()
{
 DDRC=0xff;
 DDRD=0xff;
 while(1)
 {
  sendfreq(1000);
  sendphase(1);
 }
}