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rp2040-rx : analog mic example

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This commit is contained in:
Georgi Gerganov
2022-07-22 21:59:47 +03:00
parent 4680ff5f5e
commit 84cdf0a0bd
9 changed files with 537 additions and 17 deletions
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24
examples/esp32-rx/esp32-rx.ino
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@@ -14,7 +14,7 @@
// Tested I2S microphones:
// - Adafruit I2S SPH0645
//
// The ESP32 microcontroller has a built-int 12-bit ADC which is used to digitalize the analog signal
// The ESP32 microcontroller has a built-in 12-bit ADC which is used to digitalize the analog signal
// from the external analog microphone. When I2S microphone is used, the ADC is not used.
//
// The sketch optionally supports displaying the received "ggwave" data on an OLED display.
@@ -75,7 +75,7 @@
// Uncoment this line to enable long-range transmission
// These protocols are slower and use more memory to decode, but are much more robust
//#define EXAMPLE_LONG_RANGE 1
//#define LONG_RANGE 1
#include <ggwave.h>
@@ -89,12 +89,13 @@ const int kPinLED0 = 2;
GGWave ggwave;
// Audio capture configuration
using TSample = int16_t;
using TSample = int16_t;
#if defined(MIC_ANALOG)
using TSampleInput = int16_t;
using TSampleInput = int16_t;
#elif defined(MIC_I2S) || defined(MIC_I2S_SPH0645)
using TSampleInput = int32_t;
using TSampleInput = int32_t;
#endif
const size_t kSampleSize_bytes = sizeof(TSample);
// High sample rate - better quality, but more CPU/Memory usage
@@ -193,6 +194,8 @@ void setup() {
#ifdef DISPLAY_OUTPUT
{
Serial.println(F("Initializing display..."));
// SSD1306_SWITCHCAPVCC = generate display voltage from 3.3V internally
if(!display.begin(SSD1306_SWITCHCAPVCC, SCREEN_ADDRESS)) {
Serial.println(F("SSD1306 allocation failed"));
@@ -229,12 +232,15 @@ void setup() {
// Adjust the "ggwave" parameters to your needs.
// Make sure that the "payloadLength" parameter matches the one used on the transmitting side.
#ifdef EXAMPLE_LONG_RANGE
#ifdef LONG_RANGE
// The "FAST" protocols require 2x more memory, so we reduce the payload length to compensate:
p.payloadLength = 8;
#else
p.payloadLength = 16;
#endif
Serial.print(F("Using payload length: "));
Serial.println(p.payloadLength);
p.sampleRateInp = sampleRate;
p.sampleRateOut = sampleRate;
p.sampleRate = sampleRate;
@@ -254,12 +260,12 @@ void setup() {
// Remove the ones that you don't need to reduce memory usage
GGWave::Protocols::rx().disableAll();
//GGWave::Protocols::rx().toggle(GGWAVE_PROTOCOL_DT_NORMAL, true);
#ifdef EXAMPLE_LONG_RANGE
#ifdef LONG_RANGE
GGWave::Protocols::rx().toggle(GGWAVE_PROTOCOL_DT_FAST, true);
#endif
GGWave::Protocols::rx().toggle(GGWAVE_PROTOCOL_DT_FASTEST, true);
//GGWave::Protocols::rx().toggle(GGWAVE_PROTOCOL_MT_NORMAL, true);
#ifdef EXAMPLE_LONG_RANGE
#ifdef LONG_RANGE
GGWave::Protocols::rx().toggle(GGWAVE_PROTOCOL_MT_FAST, true);
#endif
GGWave::Protocols::rx().toggle(GGWAVE_PROTOCOL_MT_FASTEST, true);
@@ -315,7 +321,6 @@ int niter = 0;
int tLastReceive = -10000;
GGWave::TxRxData result;
GGWave::Spectrum rxSpectrum;
void loop() {
// Read from i2s
@@ -391,6 +396,7 @@ void loop() {
#ifdef DISPLAY_OUTPUT
const auto t = millis();
static GGWave::Spectrum rxSpectrum;
if (ggwave.rxTakeSpectrum(rxSpectrum) && t > 2000) {
const bool isNew = t - tLastReceive < 2000;