usrp2_types.h File Reference

#include <usrp2_cdefs.h>
#include <stdint.h>

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Defines
#define	U2_FPF_RP   20
#define	U2_DOUBLE_TO_FXPT_FREQ(f)   (int64_t)((f) * (1LL << U2_FPF_RP))
#define	U2_FPG_RP   7
#define	U2_DOUBLE_TO_FXPT_GAIN(g)   (int16_t)((g) * (1 << U2_FPG_RP))
Typedefs
typedef int16_t	u2_fxpt_gain_t
	Fixed point representation of a gain in dB (VITA-49 compatible)
Functions
static u2_fxpt_freq_t	u2_double_to_fxpt_freq (double f)
static int	u2_fxpt_freq_round_to_int (u2_fxpt_freq_t fx)
static unsigned int	u2_fxpt_freq_round_to_uint (u2_fxpt_freq_t fx)
static double	u2_fxpt_freq_to_double (u2_fxpt_freq_t fx)
static uint32_t	u2_fxpt_freq_hi (u2_fxpt_freq_t f)
static uint32_t	u2_fxpt_freq_lo (u2_fxpt_freq_t f)
static u2_fxpt_freq_t	u2_fxpt_freq_from_hilo (uint32_t hi, uint32_t lo)
static u2_fxpt_gain_t	u2_double_to_fxpt_gain (double g)
static float	u2_fxpt_gain_to_double (u2_fxpt_gain_t fx)
static int	u2_fxpt_gain_round_to_int (u2_fxpt_gain_t fx)
Variables
__U2_BEGIN_DECLS typedef int64_t	u2_fxpt_freq_t
	Fixed point representation of a frequency in Hertz (VITA-49 compatible)

---

Define Documentation

#define U2_DOUBLE_TO_FXPT_FREQ

(

f

)

(int64_t)((f) * (1LL << U2_FPF_RP))

Referenced by u2_double_to_fxpt_freq().

#define U2_DOUBLE_TO_FXPT_GAIN

(

g

)

(int16_t)((g) * (1 << U2_FPG_RP))

Referenced by u2_double_to_fxpt_gain().

#define U2_FPF_RP   20

Referenced by u2_fxpt_freq_round_to_int(), u2_fxpt_freq_round_to_uint(), and u2_fxpt_freq_to_double().

#define U2_FPG_RP   7

Referenced by u2_fxpt_gain_round_to_int(), and u2_fxpt_gain_to_double().

---

Typedef Documentation

typedef int16_t u2_fxpt_gain_t

Fixed point representation of a gain in dB (VITA-49 compatible)

16-bit two's complement, with the radix point 7 bits up from the bottom. Q9.7 format (7 bits to the right of the radix point)

---

Function Documentation

static u2_fxpt_freq_t u2_double_to_fxpt_freq

(

double

f

)

[inline, static]

References U2_DOUBLE_TO_FXPT_FREQ.

static u2_fxpt_gain_t u2_double_to_fxpt_gain

(

double

g

)

[inline, static]

References U2_DOUBLE_TO_FXPT_GAIN.

static u2_fxpt_freq_t u2_fxpt_freq_from_hilo	(	uint32_t	hi,
		uint32_t	lo
	)		[inline, static]

References u2_fxpt_freq_t.

static uint32_t u2_fxpt_freq_hi

(

u2_fxpt_freq_t

f

)

[inline, static]

static uint32_t u2_fxpt_freq_lo

(

u2_fxpt_freq_t

f

)

[inline, static]

static int u2_fxpt_freq_round_to_int

(

u2_fxpt_freq_t

fx

)

[inline, static]

References U2_FPF_RP.

static unsigned int u2_fxpt_freq_round_to_uint

(

u2_fxpt_freq_t

fx

)

[inline, static]

References U2_FPF_RP.

static double u2_fxpt_freq_to_double

(

u2_fxpt_freq_t

fx

)

[inline, static]

References U2_FPF_RP.

static int u2_fxpt_gain_round_to_int

(

u2_fxpt_gain_t

fx

)

[inline, static]

References U2_FPG_RP.

static float u2_fxpt_gain_to_double

(

u2_fxpt_gain_t

fx

)

[inline, static]

References U2_FPG_RP.

---

Variable Documentation

__U2_BEGIN_DECLS typedef int64_t u2_fxpt_freq_t

Fixed point representation of a frequency in Hertz (VITA-49 compatible)

64-bit two's complement, with the radix point 20 bits up from the bottom. Q44.20 format (20 bits to the right of the radix point)

Values range from +/- 8.79 terahertz with a resolution of 0.95 microhertz.

Referenced by u2_fxpt_freq_from_hilo().