dds.h File Reference

#include "complex.h"

Go to the source code of this file.

Functions
int32_t	dds_phase_rate (float frequency)
	Find the phase rate value to achieve a particular frequency.
float	dds_frequency (int32_t phase_rate)
int	dds_scaling_dbm0 (float level)
	Find the scaling factor needed to achieve a specified level in dBm0.
int	dds_scaling_dbov (float level)
int16_t	dds_lookup (uint32_t phase)
	Find the amplitude for a particular phase.
int16_t	dds_offset (uint32_t phase_acc, int32_t phase_offset)
	Find the amplitude for a particular phase offset from an accumulated phase.
int16_t	dds (uint32_t *phase_acc, int32_t phase_rate)
	Generate an integer tone sample.
int16_t	dds_mod (uint32_t *phase_acc, int32_t phase_rate, int scale, int32_t phase)
	Generate an integer tone sample, with modulation.
icomplex_t	dds_complex (uint32_t *phase_acc, int32_t phase_rate)
	Generate a complex integer tone sample.
icomplex_t	dds_complex_mod (uint32_t *phase_acc, int32_t phase_rate, int scale, int32_t phase)
	Generate a complex integer tone sample, with modulation.
int32_t	dds_phase_ratef (float frequency)
float	dds_frequencyf (int32_t phase_rate)
float	dds_scaling_dbm0f (float level)
float	dds_scaling_dbovf (float level)
float	ddsf (uint32_t *phase_acc, int32_t phase_rate)
	Generate a floating point tone sample.
float	dds_modf (uint32_t *phase_acc, int32_t phase_rate, float scale, int32_t phase)
	Generate a floating point tone sample, with modulation.
complexf_t	dds_complexf (uint32_t *phase_acc, int32_t phase_rate)
	Generate a complex floating point tone sample.
complexf_t	dds_complex_modf (uint32_t *phase_acc, int32_t phase_rate, float scale, int32_t phase)
	Generate a complex floating point tone sample, with modulation.

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Detailed Description

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Function Documentation

int16_t dds (  uint32_t *  phase_acc, int32_t  phase_rate )

Generate an integer tone sample. Parameters: phase_acc  A pointer to a phase accumulator value. phase_rate  The phase increment to be applied. Returns: The signal amplitude, between -32767 and 32767.

icomplex_t dds_complex (  uint32_t *  phase_acc, int32_t  phase_rate )

Generate a complex integer tone sample. Parameters: phase_acc  A pointer to a phase accumulator value. phase_rate  The phase increment to be applied. Returns: The complex signal amplitude, between -32767 and 32767.

icomplex_t dds_complex_mod (  uint32_t *  phase_acc, int32_t  phase_rate, int  scale, int32_t  phase )

Generate a complex integer tone sample, with modulation. Parameters: phase_acc  A pointer to a phase accumulator value. phase_rate  The phase increment to be applied. scale  The scaling factor. phase  The phase offset. Returns: The complex signal amplitude.

complexf_t dds_complex_modf (  uint32_t *  phase_acc, int32_t  phase_rate, float  scale, int32_t  phase )

Generate a complex floating point tone sample, with modulation. Parameters: phase_acc  A pointer to a phase accumulator value. phase_rate  The phase increment to be applied. scale  The scaling factor. phase  The phase offset. Returns: The complex signal amplitude.

complexf_t dds_complexf (  uint32_t *  phase_acc, int32_t  phase_rate )

Generate a complex floating point tone sample. Parameters: phase_acc  A pointer to a phase accumulator value. phase_rate  The phase increment to be applied. Returns: The complex signal amplitude, between -32767 and 32767.

int16_t dds_lookup (  uint32_t  phase  )

Find the amplitude for a particular phase. Parameters: phase  The desired phase 32 bit phase. Returns: The signal amplitude.

int16_t dds_mod (  uint32_t *  phase_acc, int32_t  phase_rate, int  scale, int32_t  phase )

Generate an integer tone sample, with modulation. Parameters: phase_acc  A pointer to a phase accumulator value. phase_rate  The phase increment to be applied. scale  The scaling factor. phase  The phase offset. Returns: The signal amplitude.

float dds_modf (  uint32_t *  phase_acc, int32_t  phase_rate, float  scale, int32_t  phase )

Generate a floating point tone sample, with modulation. Parameters: phase_acc  A pointer to a phase accumulator value. phase_rate  The phase increment to be applied. scale  The scaling factor. phase  The phase offset. Returns: The signal amplitude.

int16_t dds_offset (  uint32_t  phase_acc, int32_t  phase_offset )

Find the amplitude for a particular phase offset from an accumulated phase. Parameters: phase_acc  The accumulated phase. phase_offset  The phase offset. Returns: The signal amplitude.

int32_t dds_phase_rate (  float  frequency  )

Find the phase rate value to achieve a particular frequency. Parameters: frequency  The desired frequency, in Hertz. Returns: The phase rate which while achieve the desired frequency.

int dds_scaling_dbm0 (  float  level  )

Find the scaling factor needed to achieve a specified level in dBm0. Parameters: level  The desired signal level, in dBm0. Returns: The scaling factor.

float ddsf (  uint32_t *  phase_acc, int32_t  phase_rate )

Generate a floating point tone sample. Parameters: phase_acc  A pointer to a phase accumulator value. phase_rate  The phase increment to be applied. Returns: The signal amplitude, between -32767 and 32767.

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