seiichi horie / Mbed 2 deprecated synthesizer_f746

Synthesizer based on the Unzen / Nucleo F746ZG

Dependencies:   amakusa mbed-dsp mbed shimabara ukifune unzen_nucleo_f746

Fork of skeleton_unzen_nucleo_f746 by seiichi horie

雲仙フレームワークのテストとして作っているプロジェクトです。中身はどんどん変っていきます。 説明はDSP空挺団の「シンセサイザー」カテゴリーを参照してください。初回は「ドッグフードを食べる」です。

signal_processing.h@16:d4ea3e6a0bce, 2017-01-31 (annotated)

Committer:
shorie
Date:
Tue Jan 31 12:52:59 2017 +0000
Revision:
16:d4ea3e6a0bce
Parent:
15:de22b9d147e0
Child:
18:b9b1116f8768
update the VFO.

Who changed what in which revision?

UserRevisionLine numberNew contents of line
shorie 6:486b1cb03e61 1 #ifndef _SIGNAL_PROCESSING_H_
shorie 6:486b1cb03e61 2 #define _SIGNAL_PROCESSING_H_
shorie 6:486b1cb03e61 3
shorie 6:486b1cb03e61 4 #include "amakusa.h"
shorie 6:486b1cb03e61 5
shorie 14:cec63d8da48c 6 enum wave_style { triangle, square };
shorie 14:cec63d8da48c 7
shorie 14:cec63d8da48c 8 // User Signal processing Class
shorie 14:cec63d8da48c 9 class VFO {
shorie 14:cec63d8da48c 10 public:
shorie 14:cec63d8da48c 11 // essential members. Do not touch
shorie 14:cec63d8da48c 12 VFO( void );
shorie 14:cec63d8da48c 13 void run(
shorie 14:cec63d8da48c 14 float out_buffer[], // place to write the right output samples
shorie 14:cec63d8da48c 15 unsigned int block_size // block size [sample]
shorie 14:cec63d8da48c 16 );
shorie 14:cec63d8da48c 17
shorie 14:cec63d8da48c 18 // parameter settings
shorie 14:cec63d8da48c 19 void set_frequency( int freq ); // unit is Hz.
shorie 14:cec63d8da48c 20 void set_Fs( int Fs ); // unit is Hz.
shorie 14:cec63d8da48c 21 void set_duty_cycle( float duty ); // 0 ... 0.5
shorie 14:cec63d8da48c 22 void set_wave_style( wave_style style );
shorie 14:cec63d8da48c 23 private:
shorie 14:cec63d8da48c 24
shorie 16:d4ea3e6a0bce 25 // control variables.
shorie 14:cec63d8da48c 26 int frequency; // VFO frequency [Hz]
shorie 14:cec63d8da48c 27 int Fs; // sampling Frequency [Hz]
shorie 14:cec63d8da48c 28 float duty_cycle; // VFO duty cycle. 0 ... 0.5
shorie 14:cec63d8da48c 29 wave_style style; // style of the wave form.
shorie 15:de22b9d147e0 30 int current_phase; // internal variable of VFO.
shorie 15:de22b9d147e0 31
shorie 16:d4ea3e6a0bce 32 // internal variable.
shorie 16:d4ea3e6a0bce 33 int half_way; // change point by duty cycle. ( period * duty_cycle ).
shorie 16:d4ea3e6a0bce 34 float rising_rate;
shorie 16:d4ea3e6a0bce 35 float falling_rate;
shorie 16:d4ea3e6a0bce 36
shorie 16:d4ea3e6a0bce 37 void update_parameters(void); // call one of the parameter is changed.
shorie 14:cec63d8da48c 38 };
shorie 14:cec63d8da48c 39
shorie 14:cec63d8da48c 40
shorie 6:486b1cb03e61 41 // User Signal processing Class
shorie 6:486b1cb03e61 42 class SignalProcessing {
shorie 6:486b1cb03e61 43 public:
shorie 6:486b1cb03e61 44 // essential members. Do not touch
shorie 6:486b1cb03e61 45 SignalProcessing( unsigned int block_size );
shorie 6:486b1cb03e61 46 void run(
shorie 6:486b1cb03e61 47 float rx_left_buffer[], // array of the left input samples
shorie 6:486b1cb03e61 48 float rx_right_buffer[], // array of the right input samples
shorie 6:486b1cb03e61 49 float tx_left_buffer[], // place to write the left output samples
shorie 13:b33cb5925113 50 float tx_right_buffer[], // place to write the right output samples
shorie 6:486b1cb03e61 51 unsigned int block_size // block size [sample]
shorie 6:486b1cb03e61 52 );
shorie 6:486b1cb03e61 53
shorie 6:486b1cb03e61 54 // project depenedent members.
shorie 6:486b1cb03e61 55 void set_volume( float vol );
shorie 14:cec63d8da48c 56 void set_Fs( int Fs ); // unit is Hz.
shorie 15:de22b9d147e0 57 void set_vfo_frequency( int freq ); // unit is Hz.
shorie 15:de22b9d147e0 58 void set_vfo_duty_cycle( float duty ); // 0 ... 0.5
shorie 15:de22b9d147e0 59 void set_vfo_wave_style( wave_style style );
shorie 6:486b1cb03e61 60 private:
shorie 6:486b1cb03e61 61 // essential members. Do not touch.
shorie 6:486b1cb03e61 62 void enter_critical_section(void);
shorie 6:486b1cb03e61 63 void leave_critical_section(void);
shorie 6:486b1cb03e61 64
shorie 6:486b1cb03e61 65 // project dependent members.
shorie 14:cec63d8da48c 66 float volume_level; // 0 ... 1.0
shorie 14:cec63d8da48c 67 VFO *vfo;
shorie 6:486b1cb03e61 68 };
shorie 6:486b1cb03e61 69
shorie 6:486b1cb03e61 70 #endif