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stuce-bot 2025-06-30 20:47:33 +02:00
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libraries/M5Unified/examples/Basic/Microphone/Microphone.ino Normal file
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#include <M5UnitLCD.h>
#include <M5UnitOLED.h>
#include <M5Unified.h>
static constexpr const size_t record_number = 256;
static constexpr const size_t record_length = 200;
static constexpr const size_t record_size = record_number * record_length;
static constexpr const size_t record_samplerate = 16000;
static int16_t prev_y[record_length];
static int16_t prev_h[record_length];
static size_t rec_record_idx = 2;
static size_t draw_record_idx = 0;
static int16_t *rec_data;
void setup(void)
{
auto cfg = M5.config();
// cfg.external_speaker.hat_spk = true; /// use external speaker (HAT SPK)
// cfg.external_speaker.hat_spk2 = true; /// use external speaker (HAT SPK2)
// cfg.external_speaker.atomic_spk = true; /// use external speaker (ATOMIC SPK)
M5.begin(cfg);
M5.Display.startWrite();
if (M5.Display.width() > M5.Display.height())
{
M5.Display.setRotation(M5.Display.getRotation()^1);
}
M5.Display.setCursor(0, 0);
M5.Display.print("REC");
rec_data = (typeof(rec_data))heap_caps_malloc(record_size * sizeof(int16_t), MALLOC_CAP_8BIT);
memset(rec_data, 0 , record_size * sizeof(int16_t));
M5.Speaker.setVolume(255);
/// Since the microphone and speaker cannot be used at the same time, turn off the speaker here.
M5.Speaker.end();
M5.Mic.begin();
}
void loop(void)
{
M5.update();
if (M5.Mic.isEnabled())
{
static constexpr int shift = 6;
auto data = &rec_data[rec_record_idx * record_length];
if (M5.Mic.record(data, record_length, record_samplerate))
{
data = &rec_data[draw_record_idx * record_length];
int32_t w = M5.Display.width();
if (w > record_length - 1) { w = record_length - 1; }
for (int32_t x = 0; x < w; ++x)
{
M5.Display.writeFastVLine(x, prev_y[x], prev_h[x], TFT_BLACK);
int32_t y1 = (data[x ] >> shift);
int32_t y2 = (data[x + 1] >> shift);
if (y1 > y2)
{
int32_t tmp = y1;
y1 = y2;
y2 = tmp;
}
int32_t y = (M5.Display.height() >> 1) + y1;
int32_t h = (M5.Display.height() >> 1) + y2 + 1 - y;
prev_y[x] = y;
prev_h[x] = h;
M5.Display.writeFastVLine(x, y, h, TFT_WHITE);
}
M5.Display.display();
if (++draw_record_idx >= record_number) { draw_record_idx = 0; }
if (++rec_record_idx >= record_number) { rec_record_idx = 0; }
}
}
if (M5.BtnA.wasHold() || M5.BtnB.wasClicked())
{
auto cfg = M5.Mic.config();
cfg.noise_filter_level = (cfg.noise_filter_level + 8) & 255;
M5.Mic.config(cfg);
M5.Display.setCursor(32,0);
M5.Display.printf("nf:%03d", cfg.noise_filter_level);
}
else
if (M5.BtnA.wasClicked() || (M5.Touch.getCount() && M5.Touch.getDetail(0).wasClicked()))
{
if (M5.Speaker.isEnabled())
{
M5.Display.clear();
while (M5.Mic.isRecording()) { M5.delay(1); }
/// Since the microphone and speaker cannot be used at the same time, turn off the microphone here.
M5.Mic.end();
M5.Speaker.begin();
M5.Display.setCursor(0,0);
M5.Display.print("PLAY");
int start_pos = rec_record_idx * record_length;
if (start_pos < record_size)
{
M5.Speaker.playRaw(&rec_data[start_pos], record_size - start_pos, record_samplerate, false, 1, 0);
}
if (start_pos > 0)
{
M5.Speaker.playRaw(rec_data, start_pos, record_samplerate, false, 1, 0);
}
do
{
M5.delay(1);
M5.update();
} while (M5.Speaker.isPlaying());
/// Since the microphone and speaker cannot be used at the same time, turn off the speaker here.
M5.Speaker.end();
M5.Mic.begin();
M5.Display.clear();
M5.Display.setCursor(0,0);
M5.Display.print("REC");
}
}
}
#if !defined ( ARDUINO )
extern "C" {
void loopTask(void*)
{
setup();
for (;;) {
loop();
}
vTaskDelete(NULL);
}
void app_main()
{
xTaskCreatePinnedToCore(loopTask, "loopTask", 8192, NULL, 1, NULL, 1);
}
}
#endif