Crazypedia
55 lines
1.9 KiB
C++
55 lines
1.9 KiB
C++
#pragma once
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#include <Tactility/hal/touch/TouchDevice.h>
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#include <tactility/device.h>
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// Capacitive touch for the LilyGO T-Deck Max's Hynitron CST66xx controller at
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// I2C 0x1A. (The vendor docs label it "CST328", but the vendor HynTouch driver
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// probes cst66xx first and that is what answers here.) This is a minimal,
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// single-touch port of the vendor's hyn_cst66xx.c protocol for LVGL pointer input.
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class Cst66xxTouch final : public tt::hal::touch::TouchDevice {
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public:
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struct Configuration {
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::Device* i2cController;
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uint8_t address;
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uint16_t width;
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uint16_t height;
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bool swapXy;
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bool mirrorX;
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bool mirrorY;
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};
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explicit Cst66xxTouch(const Configuration& configuration) : configuration(configuration) {}
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std::string getName() const override { return "CST66xx"; }
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std::string getDescription() const override { return "CST66xx I2C capacitive touch"; }
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bool start() override;
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bool stop() override;
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bool supportsLvgl() const override { return true; }
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bool startLvgl(lv_display_t* display) override;
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bool stopLvgl() override;
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lv_indev_t* getLvglIndev() override { return indev; }
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bool supportsTouchDriver() override { return false; }
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std::shared_ptr<tt::hal::touch::TouchDriver> getTouchDriver() override { return nullptr; }
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private:
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Configuration configuration;
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lv_indev_t* indev = nullptr;
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int16_t lastX = 0;
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int16_t lastY = 0;
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// The CST66xx also reports the three bezel touch-keys (heart / speech-bubble /
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// paper-airplane). bezelKeyDown latches a press so we act once on the rising
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// edge rather than every poll while the key is held.
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bool bezelKeyDown = false;
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bool readPoint(int16_t& x, int16_t& y);
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void handleBezelKey(uint8_t keyId, bool pressed);
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static void readCallback(lv_indev_t* indev, lv_indev_data_t* data);
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};
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