view dds.h @ 270:a451d4618dbf

Simplify code moving the update of the DDS frequency display to the wrappers
author Daniele Nicolodi <daniele.nicolodi@obspm.fr>
date Fri, 10 Jul 2015 15:21:15 +0200
parents 5296f3bcd160
children
line wrap: on
line source

#ifndef __FXANALYSE_DDS_H__
#define __FXANALYSE_DDS_H__

typedef long long int64;
typedef unsigned long long uint64;

static inline uint64 ftw(double clock, double freq)
{
	uint64 ftw = freq * ((double)(1ULL << 48) / clock);
	return ftw;
}

static inline double freq(double clock, uint64 ftw)
{
	double freq = (double)ftw * (clock / (double)(1ULL << 48));
	return freq;
}

static inline int strtouint64(const char *str, uint64 *v)
{
	char *end;
	*v = strtoull(str, &end, 0);
	if (*end != '\0')
		return -1;
	return 0;
}

#endif