m5stick_cplus2_boilerplate.c

#include <M5StickCPlus2.h>
#include <M5Unified.h>

// DISPLAY
// SIZE: 135x240
// -- TEXT SIZE
#define BIG_TEXT 4
#define MEDIUM_TEXT 3
#define SMALL_TEXT 2
#define TINY_TEXT 1

// -- TEXT COLOR
#define TEXT_COLOR_BACK 0x0000
#define TEXT_COLOR_BLACK 0x0000
#define TEXT_COLOR_NAVY 0x000F
#define TEXT_COLOR_DARKGREEN 0x03E0
#define TEXT_COLOR_DARKCYAN 0x03EF
#define TEXT_COLOR_MAROON 0x7800
#define TEXT_COLOR_PURPLE 0x780F
#define TEXT_COLOR_OLIVE 0x7BE0
#define TEXT_COLOR_LIGHTGREY 0xC618
#define TEXT_COLOR_DARKGREY 0x7BEF
#define TEXT_COLOR_BLUE 0x001F
#define TEXT_COLOR_GREEN 0x07E0
#define TEXT_COLOR_CYAN 0x07FF
#define TEXT_COLOR_RED 0xF800
#define TEXT_COLOR_MAGENTA 0xF81F
#define TEXT_COLOR_YELLOW 0xFFE0
#define TEXT_COLOR_WHITE 0xFFFF
#define TEXT_COLOR_ORANGE 0xFDA0
#define TEXT_COLOR_GREENYELLOW 0xB7E0
#define TEXT_COLOR_PINK 0xFC9F

// -- ROTATION
#define DISPLAY_ROTATION_HORIZONTAL_FLIPPED 3
#define DISPLAY_ROTATION_VERTICAL_FLIPPED 2
#define DISPLAY_ROTATION_HORIZONTAL 1
#define DISPLAY_ROTATION_VERTICAL 0

// FEATURES
#define ACTIVE_LOW_IR
#define M5LED 19
#define ROTATION
#define USE_EEPROM
#define RTC      // plus2 has a BM8563 RTC but the class isn't the same, needs work.
#define SDCARD   // Requires a custom-built adapter, but can have one.
#define PWRMGMT
#define SPEAKER M5.Speaker

// BUTTONS
#define BTN_A StickCP2.BtnA
#define BTN_B StickCP2.BtnB
#define BTN_PWR StickCP2.BtnPWR

const uint16_t colors[] = {
  TEXT_COLOR_NAVY, TEXT_COLOR_DARKGREEN, TEXT_COLOR_PINK,
  TEXT_COLOR_DARKCYAN, TEXT_COLOR_MAROON, TEXT_COLOR_PURPLE,
  TEXT_COLOR_OLIVE, TEXT_COLOR_LIGHTGREY, TEXT_COLOR_DARKGREY,
  TEXT_COLOR_BLUE, TEXT_COLOR_GREEN, TEXT_COLOR_CYAN,
  TEXT_COLOR_RED, TEXT_COLOR_MAGENTA, TEXT_COLOR_YELLOW,
  TEXT_COLOR_WHITE, TEXT_COLOR_ORANGE, TEXT_COLOR_GREENYELLOW
};

void initDeviceConfig() {
  auto cfg = M5.config();
  StickCP2.begin(cfg);
}

void initDisplayConfig() {
  StickCP2.Display.setRotation(DISPLAY_ROTATION_HORIZONTAL_FLIPPED);
  StickCP2.Display.setTextColor(TEXT_COLOR_GREEN);
  StickCP2.Display.setTextSize(SMALL_TEXT);
}

void setRandomTextColor() {
  int index = random(0, sizeof(colors) / sizeof(colors[0]));
  uint16_t randomColor = colors[index];

  StickCP2.Display.setTextColor(randomColor);
  StickCP2.Display.clear();
}

void clockText() {
  // This method is to set the RTC module inital date
  // StickCP2.Rtc.setDateTime({{2025, 3, 29}, {12, 48, 0}});
  auto dt = StickCP2.Rtc.getDateTime();
  static constexpr const char* const wd[7] = {"Sun", "Mon", "Tue", "Wed", "Thr", "Fri", "Sat"};
  
  StickCP2.Display.setCursor(0, 20);
  StickCP2.Display.printf("%s, %02d/%02d/%04d\n",  wd[dt.date.weekDay], dt.date.date, dt.date.month, dt.date.year);

  StickCP2.Display.setCursor(M5.Display.width() / 4, M5.Display.height() / 2);
  StickCP2.Display.printf("%02d:%02d:%02d", dt.time.hours, dt.time.minutes, dt.time.seconds);
}

void batteryText() {
  StickCP2.Display.setCursor(M5.Display.width() / 1.7, 115);
  StickCP2.Display.printf("B%%: %d", M5.Power.getBatteryLevel());
}

void setup() {
  initDeviceConfig();
  initDisplayConfig();
}

void loop(void) {
  StickCP2.Display.clear();
  StickCP2.update();

  clockText();
  batteryText();

  if(BTN_A.wasPressed()) {
    setRandomTextColor();
  }

  M5.delay(1000);
}