nlms_example.c File Reference

32-bit NLMS filtering

Copyright (c) 2011-2018 Microchip Technology Inc. and its subsidiaries.

#include <avr32/io.h>
#include "compiler.h"
#include "board.h"
#include "dsp.h"
#include "dsp_debug.h"
#include "sysclk.h"
#include "cycle_counter.h"

Macros
#define	FIR_COEF_SIZE   12
#define	SIZE   64
	The size of the input signal. More...

Functions
int	main (int argc, char *argv[])
	The main function. More...

Variables
A_ALIGNED dsp32_t	input_d [SIZE]
	Buffer containing filtered input data. More...
A_ALIGNED dsp32_t	input_x [SIZE]
	Buffer containing input data. More...
A_ALIGNED dsp32_t	unknown_coef_filter [FIR_COEF_SIZE]
A_ALIGNED dsp32_t	w [FIR_COEF_SIZE]
	Coefficients of the filter. More...
A_ALIGNED dsp32_t	x [FIR_COEF_SIZE]

#define FIR_COEF_SIZE   12

Referenced by main().

#define SIZE   64

The size of the input signal.

Referenced by main().

int main	(	int	argc,
		char *	argv[]
	)

The main function.

Note

the call to sysclk_init() will disable all non-vital peripheral clocks, except for the peripheral clocks explicitly enabled in conf_clock.h.

References dsp32_debug_sprintf(), dsp32_filt_nlms(), dsp_debug_initialization, FIR_COEF_SIZE, input_d, input_x, SIZE, sysclk_init(), w, and x.

A_ALIGNED dsp32_t input_d[SIZE]

Buffer containing filtered input data.

Referenced by main().

A_ALIGNED dsp32_t input_x[SIZE]

Buffer containing input data.

Referenced by main().

A_ALIGNED dsp32_t unknown_coef_filter[FIR_COEF_SIZE]

Initial value:

= {
    DSP32_Q(0.0132),
    DSP32_Q(0.0254),
    DSP32_Q(0.0579),
    DSP32_Q(0.1006),
    DSP32_Q(0.1398),
    DSP32_Q(0.1632),
    DSP32_Q(0.1632),
    DSP32_Q(0.1398),
    DSP32_Q(0.1006),
    DSP32_Q(0.0579),
    DSP32_Q(0.0254),

}

A_ALIGNED dsp32_t w[FIR_COEF_SIZE]

Coefficients of the filter.

Referenced by main().

A_ALIGNED dsp32_t x[FIR_COEF_SIZE]

Referenced by dsp16_op_exp(), dsp32_op_exp(), dsp32_op_sqrt(), and main().