不韋 呂
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UIT2_ReverbAllpassClass
Reverb system using singlae allpass filter class for ST Nucleo F401RE.
main.cpp@0:ff3a8918b1ad, 2014-10-31 (annotated)
- Committer:
- MikamiUitOpen
- Date:
- Fri Oct 31 08:14:16 2014 +0000
- Revision:
- 0:ff3a8918b1ad
- Child:
- 2:e1227bdb1ba5
1
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
MikamiUitOpen | 0:ff3a8918b1ad | 1 | //-------------------------------------------------------------- |
MikamiUitOpen | 0:ff3a8918b1ad | 2 | // Reverb system using all-pass filter dlass |
MikamiUitOpen | 0:ff3a8918b1ad | 3 | // 2014/10/31, Copyright (c) 2014 MIKAMI, Naoki |
MikamiUitOpen | 0:ff3a8918b1ad | 4 | //-------------------------------------------------------------- |
MikamiUitOpen | 0:ff3a8918b1ad | 5 | |
MikamiUitOpen | 0:ff3a8918b1ad | 6 | #include "mbed.h" |
MikamiUitOpen | 0:ff3a8918b1ad | 7 | |
MikamiUitOpen | 0:ff3a8918b1ad | 8 | #include "ADC_Base.hpp" // for ADC not using interrupt |
MikamiUitOpen | 0:ff3a8918b1ad | 9 | #include "DAC_MCP4922.hpp" // for DAC MCP4922 |
MikamiUitOpen | 0:ff3a8918b1ad | 10 | #include "ScfClockTim3.hpp" // for clock supplied to SCF |
MikamiUitOpen | 0:ff3a8918b1ad | 11 | |
MikamiUitOpen | 0:ff3a8918b1ad | 12 | #include "allpass_filter.hpp" |
MikamiUitOpen | 0:ff3a8918b1ad | 13 | |
MikamiUitOpen | 0:ff3a8918b1ad | 14 | using namespace Mikami; |
MikamiUitOpen | 0:ff3a8918b1ad | 15 | |
MikamiUitOpen | 0:ff3a8918b1ad | 16 | const int FS_ = 12000; // Sampling frequency: 12 kHz |
MikamiUitOpen | 0:ff3a8918b1ad | 17 | ADC_Base adc_(A0, FS_); // for AD |
MikamiUitOpen | 0:ff3a8918b1ad | 18 | DAC_MCP4922 myDac_; // for DA |
MikamiUitOpen | 0:ff3a8918b1ad | 19 | |
MikamiUitOpen | 0:ff3a8918b1ad | 20 | const float G_A_ = 0.6f; |
MikamiUitOpen | 0:ff3a8918b1ad | 21 | AllpassFilter<1153> allpass_(G_A_); |
MikamiUitOpen | 0:ff3a8918b1ad | 22 | |
MikamiUitOpen | 0:ff3a8918b1ad | 23 | DigitalIn sw_(D2, PullDown); |
MikamiUitOpen | 0:ff3a8918b1ad | 24 | |
MikamiUitOpen | 0:ff3a8918b1ad | 25 | int main() |
MikamiUitOpen | 0:ff3a8918b1ad | 26 | { |
MikamiUitOpen | 0:ff3a8918b1ad | 27 | ScfClockTim3(500000); // cutoff frequency: 5 kHz |
MikamiUitOpen | 0:ff3a8918b1ad | 28 | while (true) |
MikamiUitOpen | 0:ff3a8918b1ad | 29 | { |
MikamiUitOpen | 0:ff3a8918b1ad | 30 | float xn = adc_.Read(); // Read from A0 |
MikamiUitOpen | 0:ff3a8918b1ad | 31 | //----------------------------------------------- |
MikamiUitOpen | 0:ff3a8918b1ad | 32 | |
MikamiUitOpen | 0:ff3a8918b1ad | 33 | float yn; |
MikamiUitOpen | 0:ff3a8918b1ad | 34 | if (sw_.read() == 1) yn = allpass_.Execute(xn); |
MikamiUitOpen | 0:ff3a8918b1ad | 35 | else yn = xn; |
MikamiUitOpen | 0:ff3a8918b1ad | 36 | |
MikamiUitOpen | 0:ff3a8918b1ad | 37 | //----------------------------------------------- |
MikamiUitOpen | 0:ff3a8918b1ad | 38 | myDac_.Write(yn); // Write to DAC |
MikamiUitOpen | 0:ff3a8918b1ad | 39 | } |
MikamiUitOpen | 0:ff3a8918b1ad | 40 | } |