ad9851.c

通过按键控制波形

//////////////////////////////////////////////////////////////////

#include <reg52.h>

#define 	data_io		P3
sbit	w_clk	=	P2^2;
sbit	fq_ud	=	P2^1;
sbit	reset	=	P2^0;


unsigned char	word_buf[5]	= {0x01,0x00,0x00,0x5d,0x34};  //1000hz
							  //{0x01,0x00,0x00,0x0b,0x2f};//120hz

void   ad9851_init(void)			 //DDS 初始化
{
	w_clk	=	0;
	fq_ud	=	0;
	reset	=	0;
	reset	=	1;
	reset	=	0;
}


void   send_word(unsigned char *fq_word)	   //频率字送入	DDS 
{
	unsigned char cnt;
	
	reset	=	0;
	reset	=	1;
	reset	=	0;
	fq_ud	=	0;
	for(cnt=0;cnt<5;cnt++)
	{
		w_clk	=	0;
		data_io	=	fq_word[cnt];
		w_clk	=	1;
	}
	w_clk	=	0;
	fq_ud	=	1;
	fq_ud	=	0; 
}