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
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。
Diff: signal_processing.cpp
- Revision:
- 6:486b1cb03e61
- Child:
- 10:a00c73efc6c3
--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/signal_processing.cpp Fri Jan 27 01:53:43 2017 +0000 @@ -0,0 +1,46 @@ +#include "signal_processing.h" + +SignalProcessing::SignalProcessing( unsigned int block_size ) +{ + // place the signal processing initializing code here. + this->volume_level = 0.0; // sample initializaiton +} + +void SignalProcessing::run( + float rx_left_buffer[], // array of the left input samples + float rx_right_buffer[], // array of the right input samples + float tx_left_buffer[], // place to write the left output samples + float tx_right_buffer[], // place to write the left output samples + unsigned int block_size // block size [sample] + ) +{ + // place the signal processing coce here + for ( int i= 0; i< block_size; i++ ) + { + rx_left_buffer[i] = tx_left_buffer[i] * this->volume_level; + rx_right_buffer[i] = tx_right_buffer[i] * this->volume_level; + } +} + + // project depenedent members. +void SignalProcessing::set_volume( float vol ) +{ + this->enter_critical_section(); // forbidden interrrupt. + this->volume_level = vol; + this->leave_critical_section(); // now, ok to accept interrupt. +} + + + + + // essential members. Do not touch. +void SignalProcessing::enter_critical_section(void) +{ + __disable_irq(); // globaly forbid all interrupt +} + +void SignalProcessing::leave_critical_section(void) +{ + __enable_irq(); // globaly allow all interrupts +} +