Kaleidoscope/plugins/Kaleidoscope-HostPowerManagement/src/kaleidoscope/plugin/HostPowerManagement.cpp

/* -*- mode: c++ -*-
 * Kaleidoscope-HostPowerManagement -- Host power management support plugin.
 * Copyright (C) 2017, 2018  Keyboard.io, Inc.
 *
 * This program is free software: you can redistribute it and/or modify it under
 * the terms of the GNU General Public License as published by the Free Software
 * Foundation, version 3.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
 * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
 * details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program. If not, see <http://www.gnu.org/licenses/>.
 */

#include "kaleidoscope/Runtime.h"
#include <Kaleidoscope-HostPowerManagement.h>
#include <Kaleidoscope-LEDControl.h>

// This is a terrible hack until Arduino#6964 gets implemented.
// It makes the `_usbSuspendState` symbol available to us.
extern uint8_t _usbSuspendState;

namespace kaleidoscope {
namespace plugin {

bool HostPowerManagement::was_suspended_ = false;
bool HostPowerManagement::initial_suspend_ = true;

EventHandlerResult HostPowerManagement::beforeEachCycle() {

#ifdef __AVR__
  if ((_usbSuspendState & (1 << SUSPI))) {
    if (!initial_suspend_) {
      if (!was_suspended_) {
        was_suspended_ = true;
        hostPowerManagementEventHandler(Suspend);
      } else {
        hostPowerManagementEventHandler(Sleep);
      }
    }
  } else {
    if (initial_suspend_)
      initial_suspend_ = false;
    if (was_suspended_) {
      was_suspended_ = false;
      hostPowerManagementEventHandler(Resume);
    }
  }
#endif

  return EventHandlerResult::OK;
}

}
}

__attribute__((weak)) void hostPowerManagementEventHandler(kaleidoscope::plugin::HostPowerManagement::Event event) {
}

kaleidoscope::plugin::HostPowerManagement HostPowerManagement;