Measured fan PWM-to-RPM curve and plausibility helpers. More...

#include <Arduino.h>

Include dependency graph for fan_curve.h:

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Classes
struct	FanCurvePoint
	One measured point in the fan curve. More...

Namespaces
namespace	FanCurve
	Fan characterization table and interpolation helpers.

Functions
size_t	FanCurve::pointCount ()
	Returns the number of measured fan-curve points.

const FanCurvePoint *	FanCurve::points ()
	Returns the measured fan-curve table.

uint16_t	FanCurve::expectedRpmForPwm (uint8_t pwmPercent)
	Interpolates the expected RPM for a PWM command.

uint16_t	FanCurve::rpmToleranceForExpected (uint16_t expectedRpm)
	Calculates the tolerated RPM deviation for an expected speed.

bool	FanCurve::isPlausibilityRegion (uint8_t pwmPercent)
	Checks whether a PWM command is high enough for RPM plausibility checks.

Variables
constexpr uint8_t	FanCurve::kStartPwmPercent = 12
	PWM where the fan reliably starts.

constexpr uint8_t	FanCurve::kMinimumHoldPwmPercent = 10
	Lowest PWM used after the fan is spinning.

constexpr uint8_t	FanCurve::kMinimumPlausibilityPwmPercent = 18
	Minimum PWM where RPM plausibility is checked.

constexpr uint8_t	FanCurve::kPlausibilityTolerancePercent = 12
	RPM tolerance around the expected curve.

Detailed Description

Measured fan PWM-to-RPM curve and plausibility helpers.

The curve represents the production fan used by the controller. It is shared by diagnostics and fault detection so expected RPM values are calculated from the same measured data that is shown over serial output.

Classes

Namespaces

Functions

Variables

Detailed Description