CoreMatrix スリープとウェイクアップ

#include <M5Unified.h>

static constexpr uint64_t SLEEP_TIME_US = 5000000ULL;

static void drawPattern(uint8_t pattern)
{
  M5.Display.startWrite();
  M5.Display.fillScreen(TFT_BLACK);
  M5.Display.drawRect(0, 0, 16, 16, TFT_WHITE);

  if (pattern == 0) {
    M5.Display.fillRect(7, 7, 2, 2, TFT_WHITE);
  } else if (pattern == 1) {
    M5.Display.fillRect(5, 5, 6, 6, TFT_WHITE);
  } else {
    M5.Display.drawRect(3, 3, 10, 10, TFT_WHITE);
  }

  M5.Display.endWrite();
  M5.Display.display();
}

void setup()
{
  auto cfg = M5.config();
  cfg.serial_baudrate = 115200;
  M5.begin(cfg);

  M5.Display.setColorDepth(8);
  M5.Display.setRotation(1);
  M5.Display.setBrightness(128);

  drawPattern(0);
}

void loop()
{
  M5.update();

  if (M5.BtnA.wasClicked()) {
    Serial.println("KEY1: light sleep for 5 seconds");
    drawPattern(1);
    delay(200);
    M5.Power.lightSleep(SLEEP_TIME_US);
    Serial.println("Light sleep woke up");
    drawPattern(2);
  }

  if (M5.BtnB.wasClicked()) {
    Serial.println("KEY2: deep sleep for 5 seconds");
    drawPattern(1);
    delay(200);
    M5.Power.deepSleep(SLEEP_TIME_US);
  }

  delay(20);
}