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/*
* Fan.cpp
*
* Created on: 29 Jun 2016
* Author: David
*/
#include "RepRapFirmware.h"
void Fan::Init(Pin p_pin, bool hwInverted)
{
val = 0.0;
minVal = 0.1; // 10% minimum fan speed
blipTime = 100; // 100ms fan blip
blipStartTime = 0;
freq = DefaultFanPwmFreq;
pin = p_pin;
hardwareInverted = hwInverted;
inverted = false;
heatersMonitored = 0;
triggerTemperature = HOT_END_FAN_TEMPERATURE;
Refresh();
}
void Fan::SetValue(float speed)
{
if (speed > 1.0)
{
speed /= 255.0;
}
const float newVal = (speed > 0.0) ? constrain<float>(speed, minVal, 1.0) : 0.0;
if (val == 0.0 && newVal < 1.0 && blipTime != 0)
{
// Starting the fan from standstill, so blip the fan
blipStartTime = millis();
}
val = newVal;
Refresh();
}
void Fan::SetMinValue(float speed)
{
if (speed > 1.0)
{
speed /= 255.0;
}
minVal = constrain<float>(speed, 0.0, 1.0);
Refresh();
}
void Fan::SetBlipTime(float t)
{
blipTime = (uint32_t)(max<float>(t, 0.0) * SecondsToMillis);
}
void Fan::SetInverted(bool inv)
{
inverted = inv;
Refresh();
}
void Fan::SetHardwarePwm(float pwmVal)
{
if (pin >= 0)
{
bool invert = hardwareInverted;
if (inverted)
{
invert = !invert;
}
AnalogOut(pin, (invert) ? (1.0 - pwmVal) : pwmVal, freq);
}
}
void Fan::SetPwmFrequency(float p_freq)
{
freq = (uint16_t)constrain<float>(p_freq, 1.0, 65535.0);
Refresh();
}
void Fan::SetHeatersMonitored(uint16_t h)
{
heatersMonitored = h;
Refresh();
}
void Fan::Refresh()
{
float reqVal = (heatersMonitored == 0)
? val
: (reprap.GetPlatform()->AnyHeaterHot(heatersMonitored, triggerTemperature))
? max<float>(0.5, val) // make sure that thermostatic fans always run at 50% speed or more
: 0.0;
if (reqVal > 0.0 && millis() - blipStartTime < blipTime)
{
SetHardwarePwm(1.0);
}
else if (reqVal > 0.0 && reqVal < minVal)
{
SetHardwarePwm(minVal);
}
else
{
SetHardwarePwm(reqVal);
}
}
void Fan::Check()
{
if (heatersMonitored != 0 || blipTime != 0)
{
Refresh();
}
}
// End
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