M5Stack_ChainDualKey_Muter

sketch.ino

#include <M5Unified.h>
#include <Adafruit_NeoPixel.h>
#include "USB.h"
#include "USBHID.h"

#define LED_PWR_PIN 40      // LED用電源ピン
#define LED_SIG_PIN 21      // LED信号用ピン
#define NUM_LEDS 2          // 搭載されているLEDの数
#define BUTTON_LEFT_PIN 17  // 左ボタンのピン (Mute ON用)
#define BUTTON_RIGHT_PIN 0  // 右ボタンのピン (Mute OFF用)

// HIDレポートの設定
constexpr uint8_t REPORT_ID = 5;

Adafruit_NeoPixel strip(NUM_LEDS, LED_SIG_PIN, NEO_GRB + NEO_KHZ800);
m5::Button_Class ButtonLeft;
m5::Button_Class ButtonRight;
USBHID HID;

const uint8_t report_descriptor[] = {
  0x05, 0x0B,       // Usage Page (Telephony Device)
  0x09, 0x01,       // Usage (Phone)
  0xA1, 0x01,       // Collection (Application)
  0x85, REPORT_ID,  // Report ID

  0x05, 0x0B,  // Usage Page (Telephony Device)
  0x09, 0x2F,  // Usage (Phone Mute)
  0x09, 0x20,  // Usage (Hook Switch)
  0x15, 0x00,  // Logical Minimum (0)
  0x25, 0x01,  // Logical Maximum (1)
  0x75, 0x01,  // Report Size (1)
  0x95, 0x02,  // Report Count (2)
  0x81, 0x02,  // Input (Data, Variable, Absolute)
  0x75, 0x06,  // Padding (6bit)
  0x95, 0x01,  // Report Count (1)
  0x81, 0x03,  // Input (Constant, Variable, Absolute)

  0x05, 0x08,  // Usage Page (LEDs)
  0x09, 0x09,  // Usage (Mute)
  0x09, 0x17,  // Usage (Off-Hook)
  0x15, 0x00,  // Logical Minimum (0)
  0x25, 0x01,  // Logical Maximum (1)
  0x75, 0x01,  // Report Size (1)
  0x95, 0x02,  // Report Count (2)
  0x91, 0x02,  // Output (Data, Variable, Absolute)

  0x75, 0x06,  // Padding (6bit)
  0x95, 0x01,  // Report Count (1)
  0x91, 0x03,  // Output (Constant, Variable, Absolute)

  0xC0  // End Collection
};

class CustomTelephonyDevice : public USBHIDDevice {
public:
  CustomTelephonyDevice() {
    HID.addDevice(this, sizeof(report_descriptor));
  }

  uint16_t _onGetDescriptor(uint8_t* buffer) override {
    memcpy(buffer, report_descriptor, sizeof(report_descriptor));
    return sizeof(report_descriptor);
  }

  void _onOutput(uint8_t report_id, const uint8_t* buffer, uint16_t len) override {
    if (report_id == REPORT_ID && len > 0) {
      const bool pcIsMuted = (buffer[0] & 0x01) != 0;
      const bool pcIsOffHook = (buffer[0] & 0x02) != 0;

      if (!pcIsOffHook) {
        // 通話終了時: 両方のLEDを消灯
        strip.setPixelColor(0, strip.Color(0, 0, 0));
        strip.setPixelColor(1, strip.Color(0, 0, 0));
      } else if (pcIsMuted) {
        // 通話中かつミュートON時: 左側のLEDを赤で点灯
        strip.setPixelColor(0, strip.Color(255, 0, 0));
        strip.setPixelColor(1, strip.Color(0, 0, 0));
      } else {
        // 通話中かつミュートOFF時: 右側のLEDを緑で点灯
        strip.setPixelColor(0, strip.Color(0, 0, 0));
        strip.setPixelColor(1, strip.Color(0, 255, 0));
      }
      strip.show();
    }
  }

  void sendMuteOn() {
    uint8_t p[1] = { 0x03 };  // 11: 通話中, ミュートON
    HID.SendReport(REPORT_ID, p, 1);
  }

  void sendMuteOff() {
    uint8_t p[1] = { 0x02 };  // 10: 通話中, ミュートOFF
    HID.SendReport(REPORT_ID, p, 1);
  }

  void sendCallEnd() {
    uint8_t p[1] = { 0x01 };  // 01: 通話終了, ミュートON
    HID.SendReport(REPORT_ID, p, 1);
  }
};

CustomTelephonyDevice TelephonyDevice;

void setup() {
  pinMode(LED_PWR_PIN, OUTPUT);
  digitalWrite(LED_PWR_PIN, HIGH);

  USB.VID(0x1209);
  USB.PID(0x0040);
  USB.manufacturerName("Moyashipan");
  USB.productName("M5Chain DualKey Muter");

  auto cfg = M5.config();
  M5.begin(cfg);
  ButtonLeft.setHoldThresh(1000);  // 長押し判定時間

  pinMode(BUTTON_LEFT_PIN, INPUT);
  pinMode(BUTTON_RIGHT_PIN, INPUT);

  strip.begin();
  strip.show();

  HID.begin();
  USB.begin();
}

void loop() {
  const uint32_t ms = millis();
  ButtonLeft.setRawState(ms, !digitalRead(BUTTON_LEFT_PIN));
  ButtonRight.setRawState(ms, !digitalRead(BUTTON_RIGHT_PIN));

  if (ButtonLeft.wasHold()) {
    TelephonyDevice.sendCallEnd();
  } else if (ButtonLeft.wasPressed()) {
    TelephonyDevice.sendMuteOn();
  }
  if (ButtonRight.wasPressed()) {
    TelephonyDevice.sendMuteOff();
  }
  delay(10);
}