Add KY-009 RGB LED test with SoftSPI touch and LVGL.

R/G/B color switch (GPIO22/27/4), PWM brightness, and flashable firmware/cyd package.

Co-authored-by: Cursor <cursoragent@cursor.com>

include/lamp.h

@@ -0,0 +1,17 @@
+#pragma once
+
+#include <stdint.h>
+
+enum lamp_color_t : uint8_t {
+  LAMP_COLOR_R = 0,
+  LAMP_COLOR_G = 1,
+  LAMP_COLOR_B = 2,
+};
+
+void lamp_init();
+void lamp_set_on(bool on);
+bool lamp_is_on();
+void lamp_set_color(lamp_color_t c);
+lamp_color_t lamp_color();
+void lamp_set_brightness(uint8_t percent); // 0..100，只作用于当前颜色
+uint8_t lamp_brightness();

include/pins.h

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+#pragma once
+
+// CYD ESP32-2432S028R — 触控/屏脚与 tftest / hw269test 一致
+
+#define TFT_BL_PIN 21
+
+#define CYD_TOUCH_IRQ  36
+#define CYD_TOUCH_MOSI 32
+#define CYD_TOUCH_MISO 39
+#define CYD_TOUCH_CLK  25
+#define CYD_TOUCH_CS   33
+
+// KY-009 SMD RGB LED（26 留给喇叭，B 用 4）
+#define KY009_R_PIN 22  // R -> GPIO22
+#define KY009_G_PIN 27  // G -> GPIO27
+#define KY009_B_PIN 4   // B -> GPIO4
+
+#define SCREEN_WIDTH  240
+#define SCREEN_HEIGHT 320
+#define UI_HOR_RES    320
+#define UI_VER_RES    240

include/touch.h

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+#pragma once
+
+#include <lvgl.h>
+#include <stdint.h>
+
+void touch_init();
+void touch_read_cb(lv_indev_t *indev, lv_indev_data_t *data);
+
+// 调试：最近一次触点（物理 / LVGL 旋转后逻辑）
+extern int16_t g_dbg_phys_x, g_dbg_phys_y;
+extern int16_t g_dbg_logic_x, g_dbg_logic_y;
+extern bool g_dbg_touch_down;

include/ui.h

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+#pragma once
+
+void ui_create();
+void ui_refresh_lamp();