blob: d0a77ab63f180086ef5e8567f7119382b780bcc3 [file] [log] [blame]
/*
*
* Copyright (c) 2020 Project CHIP Authors
* 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 "PWMDevice.h"
#include "AppConfig.h"
#include <lib/support/CodeUtils.h>
#include <zephyr/drivers/pwm.h>
#include <zephyr/kernel.h>
#include <zephyr/logging/log.h>
LOG_MODULE_DECLARE(app, CONFIG_CHIP_APP_LOG_LEVEL);
int PWMDevice::Init(const pwm_dt_spec * aPWMDevice, uint8_t aMinLevel, uint8_t aMaxLevel, uint8_t aDefaultLevel)
{
mState = kState_On;
mMinLevel = aMinLevel;
mMaxLevel = aMaxLevel;
mLevel = aDefaultLevel;
mPwmDevice = aPWMDevice;
if (!device_is_ready(mPwmDevice->dev))
{
LOG_ERR("PWM device %s is not ready", mPwmDevice->dev->name);
return -ENODEV;
}
Set(false);
return 0;
}
void PWMDevice::SetCallbacks(PWMCallback aActionInitiatedClb, PWMCallback aActionCompletedClb)
{
mActionInitiatedClb = aActionInitiatedClb;
mActionCompletedClb = aActionCompletedClb;
}
bool PWMDevice::InitiateAction(Action_t aAction, int32_t aActor, uint8_t * aValue)
{
// TODO: this function is called InitiateAction because we want to implement some features such as ramping up here.
bool action_initiated = false;
State_t new_state;
// Initiate On/Off Action only when the previous one is complete.
if (mState == kState_Off && aAction == ON_ACTION)
{
action_initiated = true;
new_state = kState_On;
}
else if (mState == kState_On && aAction == OFF_ACTION)
{
action_initiated = true;
new_state = kState_Off;
}
else if (aAction == LEVEL_ACTION && *aValue != mLevel)
{
action_initiated = true;
if (*aValue == 0)
{
new_state = kState_Off;
}
else
{
new_state = kState_On;
}
}
if (action_initiated)
{
if (mActionInitiatedClb)
{
mActionInitiatedClb(aAction, aActor);
}
if (aAction == ON_ACTION || aAction == OFF_ACTION)
{
Set(new_state == kState_On);
}
else if (aAction == LEVEL_ACTION)
{
mState = new_state;
SetLevel(*aValue);
}
if (mActionCompletedClb)
{
mActionCompletedClb(aAction, aActor);
}
}
return action_initiated;
}
void PWMDevice::SetLevel(uint8_t aLevel)
{
LOG_INF("Setting brightness level to %u", aLevel);
mLevel = aLevel;
ApplyLevel();
}
void PWMDevice::Set(bool aOn)
{
mState = aOn ? kState_On : kState_Off;
ApplyLevel();
}
void PWMDevice::SuppressOutput()
{
pwm_set_pulse_dt(mPwmDevice, 0);
}
void PWMDevice::ApplyLevel()
{
const uint8_t maxEffectiveLevel = mMaxLevel - mMinLevel;
const uint8_t effectiveLevel = mState == kState_On ? chip::min<uint8_t>(mLevel - mMinLevel, maxEffectiveLevel) : 0;
pwm_set_pulse_dt(mPwmDevice,
static_cast<uint32_t>(static_cast<const uint64_t>(mPwmDevice->period) * effectiveLevel / maxEffectiveLevel));
}