M5Stack PaperS3 implementation (#478)

Selectively imported code from @juicecultus [fork](https://github.com/juicecultus/Tactility) with some changes/additions from me.
2026-02-03 21:22:40 +01:00
parent a935410f82
commit 9cc96fd32b
18 changed files with 541 additions and 87 deletions
@@ -0,0 +1,65 @@
+#pragma once
+
+#include <Tactility/Lock.h>
+#include <Tactility/hal/display/DisplayDevice.h>
+#include <Tactility/hal/touch/TouchDevice.h>
+
+#include <atomic>
+#include <FastEPD.h>
+#include <lvgl.h>
+
+class FastEpdDisplay final : public tt::hal::display::DisplayDevice {
+public:
+    struct Configuration final {
+        int horizontalResolution;
+        int verticalResolution;
+        std::shared_ptr<tt::hal::touch::TouchDevice> touch;
+        uint32_t busSpeedHz = 20000000;
+        int rotationDegrees = 90;
+        bool use4bppGrayscale = false;
+        uint32_t fullRefreshEveryNFlushes = 0;
+    };
+
+private:
+    Configuration configuration;
+    std::shared_ptr<tt::Lock> lock;
+
+    lv_display_t* lvglDisplay = nullptr;
+    void* lvglBuf1 = nullptr;
+    void* lvglBuf2 = nullptr;
+    uint32_t lvglBufSize = 0;
+
+    FASTEPD epd;
+    bool initialized = false;
+    uint32_t flushCount = 0;
+    std::atomic_bool forceNextFullRefresh{false};
+
+    static void flush_cb(lv_display_t* disp, const lv_area_t* area, uint8_t* px_map);
+
+public:
+    FastEpdDisplay(Configuration configuration, std::shared_ptr<tt::Lock> lock)
+        : configuration(std::move(configuration)), lock(std::move(lock)) {}
+
+    ~FastEpdDisplay() override;
+
+    void requestFullRefresh() override { forceNextFullRefresh.store(true); }
+
+    std::string getName() const override { return "FastEpdDisplay"; }
+    std::string getDescription() const override { return "FastEPD (bitbank2) E-Ink display driver"; }
+
+    bool start() override;
+    bool stop() override;
+
+    bool supportsLvgl() const override { return true; }
+    bool startLvgl() override;
+    bool stopLvgl() override;
+
+    lv_display_t* getLvglDisplay() const override { return lvglDisplay; }
+
+    bool supportsDisplayDriver() const override { return false; }
+    std::shared_ptr<tt::hal::display::DisplayDriver> getDisplayDriver() override { return nullptr; }
+
+    std::shared_ptr<tt::hal::touch::TouchDevice> getTouchDevice() override {
+        return configuration.touch;
+    }
+};