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