dds.h

单片机键盘以及LCD和AD控制程序

#define CMD XBYTE[0xb000]
#define FQUD XBYTE[0xb000]

void Set_freq(unsigned long f)
{
	unsigned char w[5]={0};
	T0 = 0;	//复位AD9851
	T0 = 1;
	T0 = 0;
	f=23.86092492*f;
	w[0] = 0x01;
	w[1] = f>>24;
	w[2] = f>>16;
	w[3] = f>>8;
	w[4] = f;
	CMD = w[0];
	CMD = w[1];
	CMD = w[2];
	CMD = w[3];
	CMD = w[4];
	w[0] = FQUD;
}