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esp32-rx : RX example for the ESP32 microcontroller

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This commit is contained in:
Georgi Gerganov
2022-06-12 14:53:41 +03:00
parent 745be065bd
commit 8bd6159fed
5 changed files with 183 additions and 10 deletions
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20
examples/arduino-rx/arduino-rx.ino
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@@ -10,8 +10,8 @@ const size_t kSampleSize_bytes = sizeof(TSample);
// default number of output channels
const char channels = 1;
// default PCM output frequency
const int frequency = 6000;
// default PCM output sampleRate
const int sampleRate = 6000;
const int samplesPerFrame = 128;
const int qpow = 9;
@@ -63,9 +63,9 @@ void setup() {
auto p = GGWave::getDefaultParameters();
p.payloadLength = 16;
p.sampleRateInp = frequency;
p.sampleRateOut = frequency;
p.sampleRate = frequency;
p.sampleRateInp = sampleRate;
p.sampleRateOut = sampleRate;
p.sampleRate = sampleRate;
p.samplesPerFrame = samplesPerFrame;
p.sampleFormatInp = GGWAVE_SAMPLE_FORMAT_I16;
p.sampleFormatOut = GGWAVE_SAMPLE_FORMAT_I16;
@@ -106,7 +106,7 @@ void setup() {
// - one channel (mono mode)
// - a 16 kHz sample rate for the Arduino Nano 33 BLE Sense
// - a 32 kHz or 64 kHz sample rate for the Arduino Portenta Vision Shields
if (!PDM.begin(channels, frequency)) {
if (!PDM.begin(channels, sampleRate)) {
Serial.println(F("Failed to start PDM!"));
while (1);
}
@@ -131,10 +131,10 @@ void loop() {
auto tEnd = millis();
if (++niter % 10 == 0) {
// print the time it took the last decode() call to complete
// should be smaller than samplesPerFrame/frequency seconds
// for example: samplesPerFrame = 128, frequency = 6000 => not more than 20 ms
// should be smaller than samplesPerFrame/sampleRate seconds
// for example: samplesPerFrame = 128, sampleRate = 6000 => not more than 20 ms
Serial.println(tEnd - tStart);
if (tEnd - tStart > 1000*(float(samplesPerFrame)/frequency)) {
if (tEnd - tStart > 1000*(float(samplesPerFrame)/sampleRate)) {
Serial.println(F("Warning: decode() took too long to execute!"));
}
}
@@ -156,7 +156,7 @@ void loop() {
send_text(ggwave, kPinSpeaker, "hello", GGWAVE_PROTOCOL_MT_FASTEST);
// resume microphone capture
if (!PDM.begin(channels, frequency)) {
if (!PDM.begin(channels, sampleRate)) {
Serial.println(F("Failed to start PDM!"));
while (1);
}