Hat Mini JoyC Arduino 使用教程

#include "M5Unified.h"
#include "M5HatMiniJoyC.h"

// MiniJoyC I2C pins
#define MiniJoyC_SDA 0
#define MiniJoyC_SCL 26

M5HatMiniJoyC joyc;

// Wait until MiniJoyC is ready
static void waitMiniJoyCReady() {
  while (!joyc.begin(&Wire, MiniJoyC_ADDR, MiniJoyC_SDA, MiniJoyC_SCL, 100000UL)) {
    delay(100);
  }
}

void setup() {
  M5.begin();
  waitMiniJoyCReady();

  M5.Display.setRotation(0);
  M5.Display.setFont(&fonts::FreeMonoBold9pt7b);
  M5.Display.fillScreen(BLACK);
}

void loop() {
  M5.update();

  // Read raw ADC values (0~4095)
  int16_t adc_x = joyc.getADCValue(ADC_X);
  int16_t adc_y = joyc.getADCValue(ADC_Y);

  // Read normalized position (-128~127)
  int8_t pos_x = joyc.getPOSValue(POS_X, _8bit);
  int8_t pos_y = joyc.getPOSValue(POS_Y, _8bit);

  // Display values
  M5.Display.fillScreen(BLACK);
  M5.Display.setTextColor(WHITE, BLACK);

  M5.Display.setCursor(0, 20);
  M5.Display.printf("ADC X:%4d", adc_x);
  M5.Display.setCursor(0, 50);
  M5.Display.printf("ADC Y:%4d", adc_y);

  M5.Display.drawLine(0, 80, 135, 80, ORANGE);

  M5.Display.setCursor(0, 100);
  M5.Display.printf("POS X:%4d", pos_x);
  M5.Display.setCursor(0, 130);
  M5.Display.printf("POS Y:%4d", pos_y);

  M5.Display.drawLine(0, 160, 135, 160, ORANGE);

  M5.Display.setCursor(0, 180);
  M5.Display.printf("BtnVal: %d", joyc.getButtonStatus());

  // Map joystick to RGB888
  uint8_t r = constrain(map(-pos_y, -128, 127, 0, 255), 0, 255);
  uint8_t g = constrain(map( pos_y, -128, 127, 0, 255), 0, 255);
  uint8_t b = constrain(map( pos_x, -128, 127, 0, 255), 0, 255);

  // Center dead zone → white
  if (abs(pos_x) < 8 && abs(pos_y) < 8) {
    r = g = b = 255;
  }

  // Combine to RGB888 (0xRRGGBB)
  uint32_t rgb888 = (r << 16) | (g << 8) | b;

  // Set MiniJoyC LED color
  joyc.setLEDColor(rgb888);

  delay(30);
}