dsp_process.c File Reference

#include "dsp_process.h"
#include "dsp.h"
#include "tpa6130.h"
#include "abdac.h"
#include "audio.h"
#include "conf_demo.h"

Functions
void	audio_callback (U32 arg)
void	dac_overrun_callback (void)
void	dac_reload_callback (void)
static void	dsp_calculate_fft (dsp16_t *fft, dsp16_t *signal)
void	dsp_process_init (int cpu_hz, int hsb_hz, int pba_hz, int pbb_hz)
void	dsp_process_task (void)
const char *	filter_active_get_description ()
const char *	filter_get_description (unsigned int num)
void	filter_restore_default ()
void	filter_set_active (unsigned int num)
void	generate_signal (dsp16_t *signal, struct signal_source *source)
unsigned int	signal_source_get_freq (struct signal_source *source)
dsp16_t	signal_source_get_volume (struct signal_source *source)
void	signal_source_init (struct signal_source *source, unsigned int frequency, dsp16_t volume)
void	signal_source_restore_defaults (struct signal_source *source)
void	signal_source_set_freq (struct signal_source *source, unsigned int frequency)
void	signal_source_set_volume (struct signal_source *source, dsp16_t volume)

Variables
unsigned int	active_filter
dsp16_t *	current_stereo_out_buf
static A_ALIGNED dsp16_t	fft_window [BUFFER_LENGTH]
A_ALIGNED dsp16_t	filter_coef [NUM_FILTERS-1][FIR_NUM_COEF]
const char *	filter_description [NUM_FILTERS]
A_ALIGNED dsp16_t	signal1_buf [BUFFER_LENGTH]
struct signal_source	signal1_generator
A_ALIGNED dsp16_t	signal2_buf [BUFFER_LENGTH]
struct signal_source	signal2_generator
dsp16_t *	signal_in_buf
A_ALIGNED dsp16_t	signal_in_fft [BUFFER_LENGTH]
A_ALIGNED dsp16_t	signal_out_buf [BUFFER_LENGTH+4]
A_ALIGNED dsp16_t	signal_out_fft [BUFFER_LENGTH]
A_ALIGNED dsp16_t	signal_pre_filter_buf [FIR_NUM_COEF+BUFFER_LENGTH]
bool	signals_are_updated
A_ALIGNED dsp16_t	stereo_out_buf1 [BUFFER_LENGTH *2]
A_ALIGNED dsp16_t	stereo_out_buf2 [BUFFER_LENGTH *2]

void audio_callback

(

U32

arg

)

References AUDIO_ADC_OUT_OF_SAMPLE_CB, AUDIO_ADC_RELOAD_CB, AUDIO_DAC_OUT_OF_SAMPLE_CB, AUDIO_DAC_RELOAD_CB, dac_overrun_callback(), and dac_reload_callback().

Referenced by dsp_process_init().

void dac_overrun_callback

(

void

)

Referenced by audio_callback().

void dac_reload_callback

(

void

)

References active_filter, BUFFER_LENGTH, current_stereo_out_buf, dsp16_filt_fir(), dsp16_vect_add_and_sat(), filter_coef, FIR_NUM_COEF, generate_signal(), signal1_buf, signal1_generator, signal2_buf, signal2_generator, signal_in_buf, signal_out_buf, signal_pre_filter_buf, signals_are_updated, stereo_out_buf1, stereo_out_buf2, and tpa6130_dac_output().

Referenced by audio_callback(), and dsp_process_init().

static void dsp_calculate_fft ( dsp16_t *  fft, dsp16_t *  signal  )

static

References BUFFER_LENGTH, BUFFER_LENGTH_LOG, dsp16_trans_realcomplexfft(), dsp16_vect_complex_abs(), dsp16_vect_dotmul(), dsp16_vect_max(), dsp16_vect_realdiv(), FFT_LENGTH, and fft_window.

Referenced by dsp_process_task().

void dsp_process_init	(	int	cpu_hz,
		int	hsb_hz,
		int	pba_hz,
		int	pbb_hz
	)

References audio_callback(), AUDIO_DAC_RELOAD_CB, BUFFER_LENGTH, current_stereo_out_buf, DAC_BITS_PER_SAMPLE, DAC_NUM_CHANNELS, dac_reload_callback(), DAC_SAMPLING_RATE, DAC_SWAP_CHANNELS, dsp16_gen_step(), DSP16_Q, dsp16_win_hamm(), fft_window, filter_restore_default(), FIR_NUM_COEF, FOSC0, signal1_generator, signal2_generator, signal_in_buf, signal_pre_filter_buf, signal_source_init(), stereo_out_buf1, tpa6130_dac_start(), tpa6130_get_volume(), tpa6130_init(), and tpa6130_set_volume().

Referenced by main().

void dsp_process_task

(

void

)

References dsp_calculate_fft(), signal_in_buf, signal_in_fft, signal_out_buf, and signal_out_fft.

Referenced by main().

const char* filter_active_get_description

(

)

References active_filter, and filter_get_description().

Referenced by main(), state_machine_filter(), and state_machine_task().

const char* filter_get_description

(

unsigned int

num

)

References filter_description, and NUM_FILTERS.

Referenced by filter_active_get_description().

void filter_restore_default

(

)

References active_filter.

Referenced by dsp_process_init().

void filter_set_active

(

unsigned int

num

)

References active_filter, and NUM_FILTERS.

Referenced by state_machine_filter().

void generate_signal	(	dsp16_t *	signal,
		struct signal_source *	source
	)

References BUFFER_LENGTH, DAC_SAMPLING_RATE, dsp16_gen_sin(), dsp16_vect_realmul(), signal_source::frequency, signal_source::phase, and signal_source::volume.

Referenced by dac_reload_callback().

unsigned int signal_source_get_freq

(

struct signal_source *

source

)

References signal_source::frequency.

Referenced by state_machine_source().

dsp16_t signal_source_get_volume

(

struct signal_source *

source

)

References signal_source::volume.

Referenced by state_machine_source().

void signal_source_init	(	struct signal_source *	source,
		unsigned int	frequency,
		dsp16_t	volume
	)

References signal_source::default_freq, signal_source::default_volume, signal_source::frequency, signal_source_restore_defaults(), and signal_source::volume.

Referenced by dsp_process_init().

void signal_source_restore_defaults

(

struct signal_source *

source

)

References signal_source::default_freq, signal_source::default_volume, signal_source::frequency, and signal_source::volume.

Referenced by signal_source_init().

void signal_source_set_freq	(	struct signal_source *	source,
		unsigned int	frequency
	)

References signal_source::frequency.

Referenced by state_machine_source().

void signal_source_set_volume	(	struct signal_source *	source,
		dsp16_t	volume
	)

References signal_source::volume.

Referenced by state_machine_source().

unsigned int active_filter

Referenced by dac_reload_callback(), filter_active_get_description(), filter_restore_default(), and filter_set_active().

dsp16_t* current_stereo_out_buf

Referenced by dac_reload_callback(), and dsp_process_init().

A_ALIGNED dsp16_t fft_window[BUFFER_LENGTH]

static

Referenced by dsp_calculate_fft(), and dsp_process_init().

A_ALIGNED dsp16_t filter_coef[NUM_FILTERS-1][FIR_NUM_COEF]

Referenced by dac_reload_callback().

const char* filter_description[NUM_FILTERS]

Initial value:

= {
    "No filtering",
    "High-pass filter,\n1000Hz cut-off",
    "Low-pass filter,\n1000Hz cut-off",
}

Referenced by filter_get_description().

A_ALIGNED dsp16_t signal1_buf[BUFFER_LENGTH]

Referenced by dac_reload_callback(), and gui_task().

struct signal_source signal1_generator

Referenced by dac_reload_callback(), dsp_process_init(), and state_machine_source().

A_ALIGNED dsp16_t signal2_buf[BUFFER_LENGTH]

Referenced by dac_reload_callback(), and gui_task().

struct signal_source signal2_generator

Referenced by dac_reload_callback(), dsp_process_init(), and state_machine_source().

dsp16_t* signal_in_buf

Referenced by dac_reload_callback(), dsp_process_init(), dsp_process_task(), and gui_task().

A_ALIGNED dsp16_t signal_in_fft[BUFFER_LENGTH]

Referenced by dsp_process_task(), and gui_task().

A_ALIGNED dsp16_t signal_out_buf[BUFFER_LENGTH+4]

Referenced by dac_reload_callback(), dsp_process_task(), and gui_task().

A_ALIGNED dsp16_t signal_out_fft[BUFFER_LENGTH]

Referenced by dsp_process_task(), and gui_task().

A_ALIGNED dsp16_t signal_pre_filter_buf[FIR_NUM_COEF+BUFFER_LENGTH]

Referenced by dac_reload_callback(), and dsp_process_init().

bool signals_are_updated

Referenced by dac_reload_callback(), and gui_print_signal_box().

A_ALIGNED dsp16_t stereo_out_buf1[BUFFER_LENGTH *2]

Referenced by dac_reload_callback(), and dsp_process_init().

A_ALIGNED dsp16_t stereo_out_buf2[BUFFER_LENGTH *2]

Referenced by dac_reload_callback().