Restore TF card UI and speaker at 20% volume.

Keep calibrated SoftSPI touch mapping unchanged.

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

include/audio_test.h

@@ -0,0 +1,20 @@
+#pragma once
+
+#include <Arduino.h>
+
+void audio_init();
+
+void audio_set_enabled(bool on);
+bool audio_is_enabled();
+
+// 音量 0–100，默认 20
+void audio_set_volume(uint8_t percent);
+uint8_t audio_get_volume();
+
+void audio_play_music();
+void audio_stop();
+bool audio_is_playing();
+
+void audio_tick();
+
+const char *audio_last_status();

include/pins.h

@@ -1,16 +1,23 @@
 #pragma once
 
-// CYD ESP32-2432S028R — 仅屏幕 + 触摸
+// CYD ESP32-2432S028R
 
 #define TFT_BL_PIN 21
 
+// TF / microSD (VSPI；触摸用 SoftSPI，不抢总线)
+#define SD_MISO 19
+#define SD_MOSI 23
+#define SD_SCK  18
+#define SD_CS   5
+
+#define SPEAKER_PIN 26
+
 #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
 
-// 物理竖屏；LVGL ROTATION_270 → 横屏 UI
 #define SCREEN_WIDTH  240
 #define SCREEN_HEIGHT 320
 #define UI_HOR_RES    320

include/sd_info.h

@@ -0,0 +1,21 @@
+#pragma once
+
+#include <Arduino.h>
+
+struct SdCardInfo {
+  bool mounted;
+  bool present;
+  const char *type;
+  const char *filesystem;
+  uint64_t card_bytes;
+  uint64_t total_bytes;
+  uint64_t used_bytes;
+  uint64_t free_bytes;
+  uint32_t root_files;
+  String error;
+};
+
+bool sd_init();
+void sd_deinit();
+SdCardInfo sd_read_info();
+String format_bytes(uint64_t bytes);

include/ui.h

@@ -1,6 +1,9 @@
 #pragma once
 
+#include "sd_info.h"
 #include <stdint.h>
 
 void ui_create();
+void ui_update(const SdCardInfo &info);
+void ui_refresh_audio_buttons();
 void ui_set_touch_debug(int16_t lx, int16_t ly, bool down);