Implemented LilyGO T-Lora Pager (#295)

Boards/LilygoTLoraPager/Source/hal/TpagerKeyboard.h

@@ -0,0 +1,54 @@
+#pragma once
+
+#include <Tactility/TactilityCore.h>
+#include <Tactility/hal/keyboard/KeyboardDevice.h>
+
+#include <Tca8418.h>
+#include <driver/gpio.h>
+#include <driver/ledc.h>
+#include <driver/pulse_cnt.h>
+
+#include <Tactility/Timer.h>
+
+
+class TpagerKeyboard : public tt::hal::keyboard::KeyboardDevice {
+
+private:
+
+    lv_indev_t* _Nullable kbHandle = nullptr;
+    lv_indev_t* _Nullable encHandle = nullptr;
+    pcnt_unit_handle_t encPcntUnit = nullptr;
+    gpio_num_t backlightPin = GPIO_NUM_NC;
+    ledc_timer_t backlightTimer;
+    ledc_channel_t backlightChannel;
+    bool backlightOkay = false;
+    int backlightImpulseDuty = 0;
+
+    std::shared_ptr<Tca8418> keypad;
+    std::unique_ptr<tt::Timer> inputTimer;
+    std::unique_ptr<tt::Timer> backlightImpulseTimer;
+
+    void initEncoder(void);
+    bool initBacklight(gpio_num_t pin, uint32_t frequencyHz, ledc_timer_t timer, ledc_channel_t channel);
+    void processKeyboard();
+    void processBacklightImpuse();
+
+public:
+
+    TpagerKeyboard(std::shared_ptr<Tca8418> tca) : keypad(std::move(tca)) {}
+    ~TpagerKeyboard() {}
+
+    std::string getName() const final { return "T-Lora Pager Keyboard"; }
+    std::string getDescription() const final { return "I2C keyboard with encoder"; }
+
+    bool start(lv_display_t* display) override;
+    bool stop() override;
+    bool isAttached() const override;
+    lv_indev_t* _Nullable getLvglIndev() override { return kbHandle; }
+
+    int getEncoderPulses();
+    bool setBacklightDuty(uint8_t duty);
+    void makeBacklightImpulse();
+};
+
+std::shared_ptr<tt::hal::keyboard::KeyboardDevice> createKeyboard();