74 lines
2.6 KiB
C++
74 lines
2.6 KiB
C++
#pragma once
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#include <Arduino.h>
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#include <Imu.h>
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// TODO: Move enums into new header and share with CrossPointSettings.h
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namespace CrossPointOrientation {
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enum Value : uint8_t { PORTRAIT = 0, LANDSCAPE_CW = 1, INVERTED = 2, LANDSCAPE_CCW = 3 };
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}
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namespace CrossPointTiltPageTurn {
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enum Value : uint8_t { TILT_OFF = 0, TILT_NORMAL = 1, TILT_INVERTED = 2 };
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}
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class HalTiltSensor;
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extern HalTiltSensor halTiltSensor; // Singleton
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class HalTiltSensor {
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bool _available = false;
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mutable Imu _sdkImu;
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// Tilt gesture state machine
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bool _tiltForwardEvent = false; // Consumed by wasTiltedForward()
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bool _tiltBackEvent = false; // Consumed by wasTiltedBack()
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bool _hadActivity = false; // Non-consuming flag for sleep timer
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bool _inTilt = false; // Currently tilted past threshold
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bool _isAwake = false; // Tracks power state
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unsigned long _initMs = 0; // Timestamp of sensor init
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unsigned long _lastTiltMs = 0; // Debounce / cooldown
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unsigned long _wakeMs = 0; // Timestamp of last wake() for stabilization
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// Tuning constants
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static constexpr float RATE_THRESHOLD_DPS = 270.0f; // Deg/sec speed to trigger flick
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static constexpr float NEUTRAL_RATE_DPS = 50.0f; // Must stop moving below this rate before next trigger
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static constexpr unsigned long COOLDOWN_MS = 600; // Minimum ms between triggers
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static constexpr unsigned long POLL_INTERVAL_MS = 50; // 20 Hz polling
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static constexpr unsigned long WAKE_STABILIZE_MS = 300; // Ignore readings after wake
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mutable unsigned long _lastPollMs = 0;
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bool readGyro(float& gx, float& gy, float& gz) const;
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public:
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// Call after BoardConfig has selected the active device.
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void begin();
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// Enables tilt polling state
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bool wake();
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// Puts tilt polling state to sleep
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bool deepSleep();
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// True if an IMU is present on this device
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bool isAvailable() const { return _available; }
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// Poll the accelerometer and update tilt gesture state.
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void update(const uint8_t mode, const uint8_t orientation, const bool inReader);
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// Returns true once per tilt-forward gesture (next page direction).
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// Consumed on read — subsequent calls return false until next gesture.
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bool wasTiltedForward();
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// Returns true once per tilt-back gesture (previous page direction).
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// Consumed on read.
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bool wasTiltedBack();
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// Non-consuming: true if any tilt activity occurred since last call.
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// Used to reset the auto-sleep inactivity timer.
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bool hadActivity();
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// Discard any pending tilt events (call when leaving reader or disabling tilt).
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void clearPendingEvents();
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};
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