ad9851.c

高速DDS芯片AD9851的应用程序

#include <iom128.h>
#define set_clk asm("sbi 0x12,0")
#define cl_clk asm("cbi 0x12,0")
#define set_fq asm("sbi 0x12,1")
#define cl_fq asm("cbi 0x12,1")
#define set_re asm("sbi 0x12,2")
#define cl_re asm("cbi 0x12,2")
#define XTAL 20
#define SENDPOT PORTB
void init()
{
DDRB|=0x01;
DDRD|=0x07;
cl_clk;
cl_fq;
set_re;
}
void main()
{
unsigned char i;
unsigned long int dds=10000000;
cl_clk;
cl_fq;
for(i=0;i<40;i++)
{
cl_clk;
if(dds&0x000000001)
      PORTB|=0x01;
else 
      PORTB&=0x00;
set_clk;
dds=dds>>1;
}
set_fq
cl_clk;
;;;
cl_fq;
}