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/*
* Fan.cpp
*
* Created on: 29 Jun 2016
* Author: David
*/
#include "Fan.h"
#include "Platform.h"
#include "RepRap.h"
void Fan::Init(Pin p_pin, bool hwInverted)
{
val = 0.0;
minVal = 0.1; // 10% minimum fan speed
blipTime = 100; // 100ms fan blip
freq = DefaultFanPwmFreq;
pin = p_pin;
hardwareInverted = hwInverted;
inverted = blipping = false;
heatersMonitored = 0;
triggerTemperature = HOT_END_FAN_TEMPERATURE;
lastPwm = -1.0; // force a refresh
Refresh();
}
void Fan::SetValue(float speed)
{
if (speed > 1.0)
{
speed /= 255.0;
}
const float newVal = constrain<float>(speed, 0.0, 1.0);
if (val == 0.0 && newVal > 0.0 && newVal < 1.0 && blipTime != 0)
{
// Starting the fan from standstill, so blip the fan
blipping = true;
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();
}
// Set the hardware PWM
// If you want make sure that the PWM is definitely updated, set lastPWM negative before calling this
void Fan::SetHardwarePwm(float pwmVal)
{
if (pin != NoPin)
{
bool invert = hardwareInverted;
if (inverted)
{
invert = !invert;
}
if (invert)
{
pwmVal = 1.0 - pwmVal;
}
// Only set the PWM if it has changed, to avoid a lot of I2C traffic when we have a DueX5 connected
if (pwmVal != lastPwm)
{
lastPwm = pwmVal;
Platform::WriteAnalog(pin, pwmVal, freq);
}
}
}
void Fan::SetPwmFrequency(float p_freq)
{
freq = (uint16_t)constrain<float>(p_freq, 1.0, 65535.0);
lastPwm = -1.0; // force the PWM to be updated
Refresh();
}
void Fan::SetHeatersMonitored(uint16_t h)
{
heatersMonitored = h;
Refresh();
}
// Refresh the fan PWM
// If you want make sure that the PWM is definitely updated, set lastPWM negative before calling this
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)
{
if (reqVal < minVal)
{
reqVal = minVal;
}
if (blipping)
{
if (millis() - blipStartTime < blipTime)
{
reqVal = 1.0;
}
else
{
blipping = false;
}
}
}
SetHardwarePwm(reqVal);
}
void Fan::Check()
{
if (heatersMonitored != 0 || blipping)
{
Refresh();
}
}
void Fan::Disable()
{
if (pin != NoPin)
{
inverted = false;
lastPwm = -1;
SetHardwarePwm(0.0);
}
pin = NoPin;
}
// End
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