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#include <iostream>
#include <stdexcept>
#include <unistd.h>
#include "hlg150h.hpp"
#include "mraa-utils.hpp"
#define PWM_PERIOD 3333
using namespace upm;
HLG150H::HLG150H(int pinRelay, int pinPWM)
{
int dutyPercent = 0;
status = mraa::SUCCESS;
this->pinRelay = pinRelay;
isPoweredShadow = false;
pwmBrightness = new mraa::Pwm(pinPWM);
status = pwmBrightness->enable(true);
status = pwmBrightness->period_us(PWM_PERIOD);
if (status != mraa::SUCCESS)
UPM_THROW("pwm config failed.");
dutyPercent = getBrightness();
isPoweredShadow = dutyPercent > 10;
}
HLG150H::~HLG150H()
{
delete pwmBrightness;
}
void HLG150H::setPowerOn()
{
isPoweredShadow = true;
MraaUtils::setGpio(pinRelay, 0);
}
void HLG150H::setPowerOff()
{
isPoweredShadow = false;
MraaUtils::setGpio(pinRelay, 1);
}
bool HLG150H::isPowered()
{
// Can't read GPIO state as setting in to input mode turns off relay
// Instead we return a shadow variable
/*
int level;
if (MraaUtils::getGpio(pinRelay, &level) == MRAA_SUCCESS)
return level == 1;
else
return false;
*/
return isPoweredShadow;
}
// If duty is less than 10% light will flicker
void HLG150H::setBrightness(int dutyPercent)
{
if (dutyPercent < 10)
dutyPercent = 10;
int dutyUs = (PWM_PERIOD * dutyPercent) / 100;
dutyUs = PWM_PERIOD - dutyUs;
status = pwmBrightness->pulsewidth_us(dutyUs);
// std::cout << "Brightness = " << dutyPercent << "%, duty = " << dutyUs << "us" << std::endl;
if (status != mraa::SUCCESS)
UPM_THROW("setBrightness failed");
}
int HLG150H::getBrightness()
{
float duty = pwmBrightness->read();
int dutyPercent = static_cast<int>(100.0 * (1.0 - duty) + 0.5);
return dutyPercent;
}
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