seiichi horie / Mbed 2 deprecated ifmag_noise_canceller

Experimental implementation of the adaptive filter of "Interface" magazine in 2016-2017

Dependencies:   amakusa mbed-dsp mbed shimabara ukifune unzen_nucleo_f746

Fork of skeleton_unzen_nucleo_f746 by seiichi horie

ハードウェアおよびソフトウェアはskelton_unzen_nucleo_f746を基本にしています。

signal_processing.cpp@15:de22b9d147e0, 2017-01-30 (annotated)

Committer:
shorie
Date:
Mon Jan 30 15:01:29 2017 +0000
Revision:
15:de22b9d147e0
Parent:
14:cec63d8da48c
Child:
18:b9b1116f8768
Update VFO.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shorie 6:486b1cb03e61 1 #include "signal_processing.h"
shorie 6:486b1cb03e61 2
shorie 10:a00c73efc6c3 3 /*========================= Project Dependent Method =========================*/
shorie 10:a00c73efc6c3 4 // Modify this constructor to initialize your audio algorithm.
shorie 6:486b1cb03e61 5 SignalProcessing::SignalProcessing( unsigned int block_size )
shorie 6:486b1cb03e61 6 {
shorie 6:486b1cb03e61 7 // place the signal processing initializing code here.
shorie 6:486b1cb03e61 8 this->volume_level = 0.0; // sample initializaiton
shorie 14:cec63d8da48c 9 this->vfo = new VFO(); // allocate VFO
shorie 10:a00c73efc6c3 10 } // End of constructor()
shorie 6:486b1cb03e61 11
shorie 10:a00c73efc6c3 12
shorie 10:a00c73efc6c3 13 // Modify this method to implement your audio algorithm.
shorie 6:486b1cb03e61 14 void SignalProcessing::run(
shorie 6:486b1cb03e61 15 float rx_left_buffer[], // array of the left input samples
shorie 6:486b1cb03e61 16 float rx_right_buffer[], // array of the right input samples
shorie 6:486b1cb03e61 17 float tx_left_buffer[], // place to write the left output samples
shorie 13:b33cb5925113 18 float tx_right_buffer[], // place to write the right output samples
shorie 6:486b1cb03e61 19 unsigned int block_size // block size [sample]
shorie 6:486b1cb03e61 20 )
shorie 6:486b1cb03e61 21 {
shorie 6:486b1cb03e61 22 // place the signal processing coce here
shorie 14:cec63d8da48c 23
shorie 14:cec63d8da48c 24 // VFO
shorie 14:cec63d8da48c 25 this->vfo->run( tx_left_buffer, block_size);
shorie 14:cec63d8da48c 26
shorie 14:cec63d8da48c 27 // apply gain and copy to right ch.
shorie 6:486b1cb03e61 28 for ( int i= 0; i< block_size; i++ )
shorie 6:486b1cb03e61 29 {
shorie 14:cec63d8da48c 30 tx_right_buffer[i] = tx_left_buffer[i] *= this->volume_level;
shorie 6:486b1cb03e61 31 }
shorie 10:a00c73efc6c3 32 } // End of run()
shorie 10:a00c73efc6c3 33
shorie 14:cec63d8da48c 34
shorie 15:de22b9d147e0 35 // Sampling Frequency
shorie 14:cec63d8da48c 36 void SignalProcessing::set_Fs( int Fs )
shorie 14:cec63d8da48c 37 {
shorie 15:de22b9d147e0 38 this->enter_critical_section(); // forbidden interrrupt.
shorie 14:cec63d8da48c 39 this->vfo->set_Fs( Fs );
shorie 15:de22b9d147e0 40 this->leave_critical_section(); // now, ok to accept interrupt.
shorie 14:cec63d8da48c 41 }
shorie 14:cec63d8da48c 42
shorie 15:de22b9d147e0 43 // Oscillation Frequency
shorie 15:de22b9d147e0 44 void SignalProcessing::set_vfo_frequency( int freq )
shorie 14:cec63d8da48c 45 {
shorie 15:de22b9d147e0 46 this->enter_critical_section(); // forbidden interrrupt.
shorie 14:cec63d8da48c 47 this->vfo->set_frequency( freq );
shorie 15:de22b9d147e0 48 this->leave_critical_section(); // now, ok to accept interrupt.
shorie 14:cec63d8da48c 49 }
shorie 14:cec63d8da48c 50
shorie 15:de22b9d147e0 51 // Duty Cycle of VFO
shorie 15:de22b9d147e0 52 void SignalProcessing::set_vfo_duty_cycle( float duty )
shorie 14:cec63d8da48c 53 {
shorie 15:de22b9d147e0 54 this->enter_critical_section(); // forbidden interrrupt.
shorie 14:cec63d8da48c 55 this->vfo->set_duty_cycle( duty );
shorie 15:de22b9d147e0 56 this->leave_critical_section(); // now, ok to accept interrupt.
shorie 14:cec63d8da48c 57 }
shorie 14:cec63d8da48c 58
shorie 15:de22b9d147e0 59 // VFO wave style
shorie 15:de22b9d147e0 60 void SignalProcessing::set_vfo_wave_style( wave_style style )
shorie 14:cec63d8da48c 61 {
shorie 15:de22b9d147e0 62 this->enter_critical_section(); // forbidden interrrupt.
shorie 14:cec63d8da48c 63 this->vfo->set_wave_style( style );
shorie 15:de22b9d147e0 64 this->leave_critical_section(); // now, ok to accept interrupt.
shorie 14:cec63d8da48c 65 }
shorie 14:cec63d8da48c 66
shorie 6:486b1cb03e61 67
shorie 15:de22b9d147e0 68 // Set the volume level to the object.
shorie 6:486b1cb03e61 69 void SignalProcessing::set_volume( float vol )
shorie 6:486b1cb03e61 70 {
shorie 6:486b1cb03e61 71 this->enter_critical_section(); // forbidden interrrupt.
shorie 6:486b1cb03e61 72 this->volume_level = vol;
shorie 6:486b1cb03e61 73 this->leave_critical_section(); // now, ok to accept interrupt.
shorie 6:486b1cb03e61 74 }
shorie 6:486b1cb03e61 75
shorie 6:486b1cb03e61 76
shorie 6:486b1cb03e61 77
shorie 10:a00c73efc6c3 78 /************************** skeleton dependent methond. ***********************/
shorie 6:486b1cb03e61 79 // essential members. Do not touch.
shorie 6:486b1cb03e61 80 void SignalProcessing::enter_critical_section(void)
shorie 6:486b1cb03e61 81 {
shorie 6:486b1cb03e61 82 __disable_irq(); // globaly forbid all interrupt
shorie 6:486b1cb03e61 83 }
shorie 6:486b1cb03e61 84
shorie 6:486b1cb03e61 85 void SignalProcessing::leave_critical_section(void)
shorie 6:486b1cb03e61 86 {
shorie 6:486b1cb03e61 87 __enable_irq(); // globaly allow all interrupts
shorie 6:486b1cb03e61 88 }
shorie 6:486b1cb03e61 89