Macros
#define	DDS_PHASE_RATE(frequency)
#define	DDS_PHASE(angle)

Functions
float	dds_phase_to_radians (uint32_t phase)
	Convert a 32 bit phase angle to an angle in radians, between 0 and 2*PI.
int32_t	dds_phase_rate (float frequency)
	Find the phase rate value to achieve a particular frequency.
float	dds_frequency (int32_t phase_rate)
	Find the frequency, in Hz, equivalent to a phase rate.
int16_t	dds_scaling_dbm0 (float level)
	Find the scaling factor needed to achieve a specified level in dBm0.
int16_t	dds_scaling_dbov (float level)
	Find the scaling factor needed to achieve a specified level in dBmov.
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.
void	dds_advance (uint32_t *phase_acc, int32_t phase_rate)
	Advance the phase, without returning any new signal sample.
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, int16_t scale, int32_t phase)
	Generate an integer tone sample, with modulation.
complexi_t	dds_lookup_complexi (uint32_t phase)
	Lookup the complex integer value of a specified phase.
complexi_t	dds_complexi (uint32_t *phase_acc, int32_t phase_rate)
	Generate a complex integer tone sample.
complexi_t	dds_complexi_mod (uint32_t *phase_acc, int32_t phase_rate, int16_t scale, int32_t phase)
	Generate a complex integer tone sample, with modulation.
complexi16_t	dds_lookup_complexi16 (uint32_t phase)
	Generate a complex 16 bit integer tone sample.
complexi16_t	dds_complexi16 (uint32_t *phase_acc, int32_t phase_rate)
	Generate a complex 16 bit integer tone sample.
complexi16_t	dds_complexi16_mod (uint32_t *phase_acc, int32_t phase_rate, int16_t scale, int32_t phase)
	Generate a complex 16bit integer tone sample, with modulation.
complexi32_t	dds_complexi32_mod (uint32_t *phase_acc, int32_t phase_rate, int16_t scale, int32_t phase)
	Generate a complex 32 bit integer tone sample, with modulation.
complexi32_t	dds_lookup_complexi32 (uint32_t phase)
	Generate a complex 32 bit integer tone sample.
complexi32_t	dds_complexi32 (uint32_t *phase_acc, int32_t phase_rate)
	Generate a complex 32 bit integer tone sample.
int32_t	dds_phase_ratef (float frequency)
	Find the phase rate equivalent to a frequency, in Hz.
float	dds_frequencyf (int32_t phase_rate)
	Find the frequency, in Hz, equivalent to a phase rate.
float	dds_scaling_dbm0f (float level)
	Find the scaling factor equivalent to a dBm0 value.
float	dds_scaling_dbovf (float level)
	Find the scaling factor equivalent to a dBmov value.
void	dds_advancef (uint32_t *phase_acc, int32_t phase_rate)
	Advance the phase, without returning any new signal sample.
float	ddsf (uint32_t *phase_acc, int32_t phase_rate)
	Generate a floating point tone sample.
float	dds_lookupf (uint32_t phase)
	Lookup the floating point value of a specified phase.
float	dds_offsetf (uint32_t phase_acc, int32_t phase_offset)
	Lookup the floating point value of a particular phase offset from an accumulated phase.
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_lookup_complexf (uint32_t phase_acc)
	Lookup the complex value of a specified phase.
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.

Macro Definition Documentation

◆ DDS_PHASE

#define DDS_PHASE ( angle )

Value:

(int32_t) ((uint32_t) ((((angle) < 0.0f) ? (360.0f + (angle)) : (angle))*65536.0f*65536.0f/360.0f))

◆ DDS_PHASE_RATE

#define DDS_PHASE_RATE ( frequency )

Value:

(int32_t) ((frequency)*65536.0f*65536.0f/SAMPLE_RATE)

Function Documentation

◆ dds()

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.

References dds(), and dds_lookup().

Referenced by dds().

◆ dds_advance()

void dds_advance	(	uint32_t *	phase_acc,
		int32_t	phase_rate )

Advance the phase, without returning any new signal sample.

Parameters

phase_acc	A pointer to a phase accumulator value.
phase_rate	The phase increment to be applied.

References dds_advance().

Referenced by dds_advance(), fsk_rx_fillin(), v17_rx(), v17_rx_fillin(), v22bis_rx(), v22bis_rx_fillin(), v27ter_rx(), v27ter_rx_fillin(), v29_rx(), v29_rx_fillin(), and v34_rx_fillin().

◆ dds_advancef()

void dds_advancef	(	uint32_t *	phase_acc,
		int32_t	phase_rate )

Advance the phase, without returning any new signal sample.

Parameters

phase_acc	A pointer to a phase accumulator value.
phase_rate	The phase increment to be applied.

References dds_advancef().

Referenced by dds_advancef(), v17_rx(), v17_rx_fillin(), v22bis_rx(), v22bis_rx_fillin(), v27ter_rx(), v27ter_rx_fillin(), v29_rx(), v29_rx_fillin(), and v34_rx_fillin().

◆ dds_complex_modf()

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, between (-1.0, -1.0) and (1.0, 1.0).

References dds_complex_modf().

Referenced by dds_complex_modf().

◆ dds_complexf()

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 (-1.0, -1.0) and (1.0, 1.0).

References dds_complexf().

Referenced by dds_complexf(), v17_tx(), v22bis_tx(), v27ter_tx(), and v29_tx().

◆ dds_complexi()

complexi_t dds_complexi	(	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, -32767) and (32767, 32767).

References dds_complexi(), and dds_lookup().

Referenced by dds_complexi(), and fsk_rx().

◆ dds_complexi16()

complexi16_t dds_complexi16	(	uint32_t *	phase_acc,
		int32_t	phase_rate )

Generate a complex 16 bit 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, -32767) and (32767, 32767).

References dds_complexi16(), and dds_lookup().

Referenced by dds_complexi16().

◆ dds_complexi16_mod()

complexi16_t dds_complexi16_mod	(	uint32_t *	phase_acc,
		int32_t	phase_rate,
		int16_t	scale,
		int32_t	phase )

Generate a complex 16bit 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, between (-32767, -32767) and (32767, 32767).

References dds_complexi16_mod(), and dds_lookup().

Referenced by dds_complexi16_mod().

◆ dds_complexi32()

complexi32_t dds_complexi32	(	uint32_t *	phase_acc,
		int32_t	phase_rate )

Generate a complex 32 bit 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, -32767) and (32767, 32767).

References dds_complexi32(), and dds_lookup().

Referenced by dds_complexi32(), v17_tx(), v22bis_tx(), v27ter_tx(), and v29_tx().

◆ dds_complexi32_mod()

complexi32_t dds_complexi32_mod	(	uint32_t *	phase_acc,
		int32_t	phase_rate,
		int16_t	scale,
		int32_t	phase )

Generate a complex 32 bit 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, between (-32767, -32767) and (32767, 32767).

References dds_complexi32_mod(), and dds_lookup().

Referenced by dds_complexi32_mod().

◆ dds_complexi_mod()

complexi_t dds_complexi_mod	(	uint32_t *	phase_acc,
		int32_t	phase_rate,
		int16_t	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, between (-32767, -32767) and (32767, 32767).

References dds_complexi_mod(), and dds_lookup().

Referenced by dds_complexi_mod().

◆ dds_frequency()

float dds_frequency ( int32_t phase_rate )

Find the frequency, in Hz, equivalent to a phase rate.

Parameters

phase_rate The phase rate.

Returns: The equivalent frequency, in Hz.

References dds_frequency().

Referenced by dds_frequency(), and v34_rx_carrier_frequency().

◆ dds_frequencyf()

float dds_frequencyf ( int32_t phase_rate )

Find the frequency, in Hz, equivalent to a phase rate.

Parameters

phase_rate The phase rate.

Returns: The equivalent frequency, in Hz.

References dds_frequencyf().

Referenced by dds_frequencyf(), v17_rx_carrier_frequency(), v17_rx_restart(), v22bis_rx_carrier_frequency(), v27ter_rx_carrier_frequency(), and v29_rx_carrier_frequency().

◆ dds_lookup()

int16_t dds_lookup ( uint32_t phase )

Find the amplitude for a particular phase.

Lookup the integer value of a specified phase.

Parameters

phase The desired phase 32 bit phase.

Returns: The signal amplitude.

Parameters

phase The phase accumulator value to be looked up.

Returns: The signal amplitude, between -32767 and 32767.

Find the amplitude for a particular phase.

Parameters

phase The phase accumulator value to be looked up.

Returns: The signal amplitude, between -32767 and 32767.

References dds_lookup().

Referenced by dds(), dds_complexi(), dds_complexi16(), dds_complexi16_mod(), dds_complexi32(), dds_complexi32_mod(), dds_complexi_mod(), dds_lookup(), dds_lookup_complexi(), dds_lookup_complexi16(), dds_lookup_complexi32(), dds_mod(), and dds_offset().

◆ dds_lookup_complexf()

complexf_t dds_lookup_complexf ( uint32_t phase_acc )

Lookup the complex value of a specified phase.

Parameters

phase The phase accumulator value to be looked up.

Returns: The complex signal amplitude, between (-1.0, -1.0) and (1.0, 1.0).

References dds_lookup_complexf().

Referenced by dds_lookup_complexf(), v17_rx(), v22bis_rx(), v27ter_rx(), and v29_rx().

◆ dds_lookup_complexi()

complexi_t dds_lookup_complexi ( uint32_t phase )

Lookup the complex integer value of a specified phase.

Parameters

phase The phase accumulator value to be looked up.

Returns: The complex signal amplitude, between (-32767, -32767) and (32767, 32767).

References dds_lookup(), and dds_lookup_complexi().

Referenced by dds_lookup_complexi().

◆ dds_lookup_complexi16()

complexi16_t dds_lookup_complexi16 ( uint32_t phase )

Generate a complex 16 bit 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, -32767) and (32767, 32767).

References dds_lookup(), and dds_lookup_complexi16().

Referenced by dds_lookup_complexi16(), v17_rx(), v22bis_rx(), v27ter_rx(), and v29_rx().

◆ dds_lookup_complexi32()

complexi32_t dds_lookup_complexi32 ( uint32_t phase )

Generate a complex 32 bit 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, -32767) and (32767, 32767).

References dds_lookup(), and dds_lookup_complexi32().

Referenced by dds_lookup_complexi32().

◆ dds_lookupf()

float dds_lookupf ( uint32_t phase )

Lookup the floating point value of a specified phase.

Parameters

phase The phase accumulator value to be looked up.

Returns: The signal amplitude, between -1.0 and 1.0.

References dds_lookupf().

Referenced by dds_lookupf().

◆ dds_mod()

int16_t dds_mod	(	uint32_t *	phase_acc,
		int32_t	phase_rate,
		int16_t	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, between -32767 and 32767.

References dds_lookup(), and dds_mod().

Referenced by dds_mod(), fsk_tx(), modem_connect_tones_tx(), sig_tone_tx(), and v22bis_tx().

◆ dds_modf()

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, between -1.0 and 1.0.

References dds_modf().

Referenced by dds_modf(), super_tone_tx(), and v22bis_tx().

◆ dds_offset()

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.

References dds_lookup(), and dds_offset().

Referenced by dds_offset().

◆ dds_offsetf()

float dds_offsetf	(	uint32_t	phase_acc,
		int32_t	phase_offset )

Lookup the floating point value of a particular phase offset from an accumulated phase.

Parameters

phase_acc	The accumulated phase.
phase_offset	The phase offset.

Returns: The signal amplitude.

References dds_offsetf().

Referenced by dds_offsetf().

◆ dds_phase_rate()

int32_t dds_phase_rate ( float frequency )

Find the phase rate value to achieve a particular frequency.

Parameters

frequency The desired frequency, in Hz.

Returns: The phase rate which while achieve the desired frequency.

References dds_phase_rate().

Referenced by dds_phase_rate(), modem_connect_tones_tx_init(), sig_tone_tx_init(), and tone_gen_descriptor_init().

◆ dds_phase_ratef()

int32_t dds_phase_ratef ( float frequency )

Find the phase rate equivalent to a frequency, in Hz.

Parameters

frequency The frequency, in Hz.

Returns: The equivalent phase rate.

References dds_phase_ratef().

Referenced by dds_phase_ratef(), tone_gen_descriptor_init(), v17_tx_init(), v22bis_init(), v22bis_tx_power(), v27ter_tx_init(), and v29_tx_init().

◆ dds_phase_to_radians()

float dds_phase_to_radians ( uint32_t phase )

Convert a 32 bit phase angle to an angle in radians, between 0 and 2*PI.

Parameters

phase The angle to convert.

Returns: The angle in radians.

References dds_phase_to_radians().

Referenced by dds_phase_to_radians().

◆ dds_scaling_dbm0()

int16_t 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.

References dds_scaling_dbm0().

Referenced by dds_scaling_dbm0(), fsk_tx_power(), modem_connect_tones_tx_init(), sig_tone_tx_init(), and tone_gen_descriptor_init().

◆ dds_scaling_dbm0f()

float dds_scaling_dbm0f ( float level )

Find the scaling factor equivalent to a dBm0 value.

Parameters

level The signal level in dBm0.

Returns: The equivalent scaling factor.

References dds_scaling_dbm0f().

Referenced by dds_scaling_dbm0f(), dtmf_tx_set_level(), and tone_gen_descriptor_init().

◆ dds_scaling_dbov()

int16_t dds_scaling_dbov ( float level )

Find the scaling factor needed to achieve a specified level in dBmov.

Parameters

level The desired signal level, in dBmov.

Returns: The scaling factor.

References dds_scaling_dbov().

Referenced by dds_scaling_dbov().

◆ dds_scaling_dbovf()

float dds_scaling_dbovf ( float level )

Find the scaling factor equivalent to a dBmov value.

Parameters

level The signal level in dBmov.

Returns: The equivalent scaling factor.

References dds_scaling_dbovf().

Referenced by dds_scaling_dbovf().

◆ ddsf()

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 -1.0 and 1.0.

References ddsf().

Referenced by ddsf().

Macros

Functions

Macro Definition Documentation

◆ DDS_PHASE

◆ DDS_PHASE_RATE

Function Documentation

◆ dds()

◆ dds_advance()

◆ dds_advancef()

◆ dds_complex_modf()

◆ dds_complexf()

◆ dds_complexi()

◆ dds_complexi16()

◆ dds_complexi16_mod()

◆ dds_complexi32()

◆ dds_complexi32_mod()

◆ dds_complexi_mod()

◆ dds_frequency()

◆ dds_frequencyf()

◆ dds_lookup()

◆ dds_lookup_complexf()

◆ dds_lookup_complexi()

◆ dds_lookup_complexi16()

◆ dds_lookup_complexi32()

◆ dds_lookupf()

◆ dds_mod()

◆ dds_modf()

◆ dds_offset()

◆ dds_offsetf()

◆ dds_phase_rate()

◆ dds_phase_ratef()

◆ dds_phase_to_radians()

◆ dds_scaling_dbm0()

◆ dds_scaling_dbm0f()

◆ dds_scaling_dbov()

◆ dds_scaling_dbovf()

◆ ddsf()