Add 3-pin whistle sound sensor digital H/L detect on GPIO22.

Touch+LVGL UI shows QUIET/SOUND, pin level, hit count; no dB (digital only).

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

include/pins.h

@@ -0,0 +1,21 @@
+#pragma once
+
+// CYD ESP32-2432S028R — 触控/屏脚与 tftest 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
+
+// 三针口哨/声音传感器：OUT 高低电平（常见：有声=HIGH）
+#define SOUND_PIN 22
+// 1 = 高电平表示检测到声音；若模块相反改成 0
+#define SOUND_ACTIVE_HIGH 1
+
+#define SCREEN_WIDTH  240
+#define SCREEN_HEIGHT 320
+#define UI_HOR_RES    320
+#define UI_VER_RES    240

include/sound.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#include <stdint.h>
+
+void sound_init();
+void sound_poll();
+
+/** 当前是否检测到声音（已按 SOUND_ACTIVE_HIGH 解释） */
+bool sound_detected();
+
+/** 原始引脚电平：true=HIGH */
+bool sound_raw_high();
+
+/** 累计触发次数（边沿，带消抖） */
+uint32_t sound_event_count();
+
+/** 最近一次触发后经过的 ms；未触发过为 UINT32_MAX */
+uint32_t sound_ms_since_last();
+
+void sound_reset_count();

include/touch.h

@@ -0,0 +1,12 @@
+#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

@@ -0,0 +1,4 @@
+#pragma once
+
+void ui_create();
+void ui_tick();