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/*
*
* Copyright (c) 2020 Project CHIP Authors
* Copyright (c) 2019 Google LLC.
* All rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "LEDWidget.h"
#include <dk_buttons_and_leds.h>
#include <zephyr/kernel.h>
static LEDWidget::LEDWidgetStateUpdateHandler sStateUpdateCallback;
void LEDWidget::InitGpio()
{
dk_leds_init();
}
void LEDWidget::SetStateUpdateCallback(LEDWidgetStateUpdateHandler stateUpdateCb)
{
if (stateUpdateCb)
sStateUpdateCallback = stateUpdateCb;
}
void LEDWidget::Init(uint32_t gpioNum)
{
mBlinkOnTimeMS = 0;
mBlinkOffTimeMS = 0;
mGPIONum = gpioNum;
mState = false;
k_timer_init(&mLedTimer, &LEDWidget::LedStateTimerHandler, nullptr);
k_timer_user_data_set(&mLedTimer, this);
Set(false);
}
void LEDWidget::Invert(void)
{
Set(!mState);
}
void LEDWidget::Set(bool state)
{
k_timer_stop(&mLedTimer);
mBlinkOnTimeMS = mBlinkOffTimeMS = 0;
DoSet(state);
}
void LEDWidget::Blink(uint32_t changeRateMS)
{
Blink(changeRateMS, changeRateMS);
}
void LEDWidget::Blink(uint32_t onTimeMS, uint32_t offTimeMS)
{
k_timer_stop(&mLedTimer);
mBlinkOnTimeMS = onTimeMS;
mBlinkOffTimeMS = offTimeMS;
if (mBlinkOnTimeMS != 0 && mBlinkOffTimeMS != 0)
{
DoSet(!mState);
ScheduleStateChange();
}
}
void LEDWidget::ScheduleStateChange()
{
k_timer_start(&mLedTimer, K_MSEC(mState ? mBlinkOnTimeMS : mBlinkOffTimeMS), K_NO_WAIT);
}
void LEDWidget::DoSet(bool state)
{
mState = state;
dk_set_led(mGPIONum, state);
}
void LEDWidget::UpdateState()
{
/* Prevent from keep updating the state if LED was set to solid On/Off value */
if (mBlinkOnTimeMS != 0 && mBlinkOffTimeMS != 0)
{
DoSet(!mState);
ScheduleStateChange();
}
}
void LEDWidget::LedStateTimerHandler(k_timer * timer)
{
if (sStateUpdateCallback)
sStateUpdateCallback(*reinterpret_cast<LEDWidget *>(timer->user_data));
}