parent
1abb151ffd
commit
8702b04e7b
@ -0,0 +1,62 @@ |
|||||||
|
/*
|
||||||
|
* ToneDetect1.ino Test the undecimated tone detector. |
||||||
|
* |
||||||
|
* Note that there is an alternative AudioAnalyzeCTCSS_F32 |
||||||
|
* tone detector for frequencies below a few hundred Hz. This |
||||||
|
* uses /16 decimation. |
||||||
|
* |
||||||
|
* This detector is suitable for DTMF or similar tones. |
||||||
|
* |
||||||
|
* Bob Larkin 26 March 2021 |
||||||
|
* Rev 10 Mar 2022 to be compatible with CTCSS detector. |
||||||
|
* |
||||||
|
* Public Domain |
||||||
|
*/ |
||||||
|
#include "OpenAudio_ArduinoLibrary.h" |
||||||
|
#include "AudioStream_F32.h" |
||||||
|
|
||||||
|
// T3.x supported sample rates: 2000, 8000, 11025, 16000, 22050, 24000, 32000, 44100, 44117, 48000,
|
||||||
|
// 88200, 88235 (44117*2), 95680, 96000, 176400, 176470, 192000
|
||||||
|
// T4.x supports any sample rate the codec will handle.
|
||||||
|
const float sample_rate_Hz = 44117.0f ; // 24000, 44117, or other frequencies listed above (untested)
|
||||||
|
const int audio_block_samples = 128; // Others untested
|
||||||
|
AudioSettings_F32 audio_settings(sample_rate_Hz, audio_block_samples); // Not used, all at default
|
||||||
|
|
||||||
|
AudioSynthWaveformSine_F32 sine1; |
||||||
|
AudioAnalyzeToneDetect_F32 toneDet1; |
||||||
|
AudioOutputI2S_F32 audioOutI2S1; |
||||||
|
AudioConnection_F32 patchCord3(sine1, toneDet1); |
||||||
|
|
||||||
|
float freq; |
||||||
|
|
||||||
|
void setup() { |
||||||
|
Serial.begin(300); |
||||||
|
delay(1000); |
||||||
|
Serial.println("OpenAudio_ArduinoLibrary - TestTone Detector"); |
||||||
|
|
||||||
|
AudioMemory_F32(20, audio_settings); |
||||||
|
|
||||||
|
toneDet1.frequency(1209.0f, 24); |
||||||
|
sine1.amplitude(1.0f); |
||||||
|
|
||||||
|
// Plot the data from this loop to see the "sin(f)/f" response
|
||||||
|
for(freq=1000.0f; freq<=1400.0f; freq += 2.0f) |
||||||
|
measureDataPoint(); |
||||||
|
} |
||||||
|
|
||||||
|
void loop() { |
||||||
|
} |
||||||
|
|
||||||
|
void measureDataPoint(void) { |
||||||
|
sine1.frequency(freq); |
||||||
|
// The toneDet1 is continuous. But, if we change frequency, we need to
|
||||||
|
// wait at least 20 cycles at the tone detector frequency
|
||||||
|
// for the old measurements to flush through. At 200 Hz toneDet1
|
||||||
|
// frequency, that would be 100 mSec. Thus, 120 msec should be enough.
|
||||||
|
delay(120); |
||||||
|
if( toneDet1.available() ) { |
||||||
|
Serial.print(freq, 2); |
||||||
|
Serial.print(","); |
||||||
|
Serial.println(20.0f*log10f(toneDet1.read()), 6); |
||||||
|
} |
||||||
|
} |
Loading…
Reference in new issue