不韋 呂 / Mbed 2 deprecated UIT2_ReverbCombClass

Reverb system using single comb filter class for ST Nucleo F401RE.

Dependencies:   UIT_ADDA mbed

main.cpp@0:47e72130375e, 2014-10-31 (annotated)

Committer:
MikamiUitOpen
Date:
Fri Oct 31 07:37:36 2014 +0000
Revision:
0:47e72130375e
Child:
1:b3a60a05da72
1

Who changed what in which revision?

UserRevisionLine numberNew contents of line
MikamiUitOpen 0:47e72130375e 1 //--------------------------------------------------------------
MikamiUitOpen 0:47e72130375e 2 // Reverb system using comb filter
MikamiUitOpen 0:47e72130375e 3 // 2014/10/31, Copyright (c) 2014 MIKAMI, Naoki
MikamiUitOpen 0:47e72130375e 4 //--------------------------------------------------------------
MikamiUitOpen 0:47e72130375e 5
MikamiUitOpen 0:47e72130375e 6 #include "mbed.h"
MikamiUitOpen 0:47e72130375e 7
MikamiUitOpen 0:47e72130375e 8 #include "ADC_Base.hpp" // for ADC not using interrupt
MikamiUitOpen 0:47e72130375e 9 #include "DAC_MCP4922.hpp" // for DAC MCP4922
MikamiUitOpen 0:47e72130375e 10 #include "ScfClockTim3.hpp" // for clock supplied to SCF
MikamiUitOpen 0:47e72130375e 11
MikamiUitOpen 0:47e72130375e 12 #include "comb_filter.hpp"
MikamiUitOpen 0:47e72130375e 13
MikamiUitOpen 0:47e72130375e 14 using namespace Mikami;
MikamiUitOpen 0:47e72130375e 15
MikamiUitOpen 0:47e72130375e 16 const int FS_ = 12000; // Sampling frequency: 12 kHz
MikamiUitOpen 0:47e72130375e 17 ADC_Base adc_(A0, FS_); // for AD
MikamiUitOpen 0:47e72130375e 18 DAC_MCP4922 myDac_; // for DA
MikamiUitOpen 0:47e72130375e 19
MikamiUitOpen 0:47e72130375e 20 const float G_C_ = 0.8f;
MikamiUitOpen 0:47e72130375e 21 const float G0_ = 1.0f - G_C_;
MikamiUitOpen 0:47e72130375e 22 CombFilter<1153> comb_(G_C_);
MikamiUitOpen 0:47e72130375e 23
MikamiUitOpen 0:47e72130375e 24 DigitalIn sw_(D2, PullDown);
MikamiUitOpen 0:47e72130375e 25
MikamiUitOpen 0:47e72130375e 26 int main()
MikamiUitOpen 0:47e72130375e 27 {
MikamiUitOpen 0:47e72130375e 28
MikamiUitOpen 0:47e72130375e 29
MikamiUitOpen 0:47e72130375e 30 ScfClockTim3(500000); // cutoff frequency: 5 kHz
MikamiUitOpen 0:47e72130375e 31 while (true)
MikamiUitOpen 0:47e72130375e 32 {
MikamiUitOpen 0:47e72130375e 33 float xn = adc_.Read(); // Read from A0
MikamiUitOpen 0:47e72130375e 34 //-----------------------------------------------
MikamiUitOpen 0:47e72130375e 35
MikamiUitOpen 0:47e72130375e 36 float yn;
MikamiUitOpen 0:47e72130375e 37 if (sw_.read() == 1) yn = comb_.Execute(G0_*xn);
MikamiUitOpen 0:47e72130375e 38 else yn = xn;
MikamiUitOpen 0:47e72130375e 39
MikamiUitOpen 0:47e72130375e 40 //-----------------------------------------------
MikamiUitOpen 0:47e72130375e 41 myDac_.Write(yn); // Write to DAC
MikamiUitOpen 0:47e72130375e 42 }
MikamiUitOpen 0:47e72130375e 43 }
MikamiUitOpen 0:47e72130375e 44