Restore TF card UI and speaker at 20% volume.

Keep calibrated SoftSPI touch mapping unchanged.

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

src/main.cpp

@@ -1,7 +1,9 @@
 #include <Arduino.h>
 #include <lvgl.h>
 
+#include "audio_test.h"
 #include "pins.h"
+#include "sd_info.h"
 #include "touch.h"
 #include "ui.h"
 
@@ -9,19 +11,38 @@ static constexpr uint32_t DRAW_BUF_SIZE =
     (SCREEN_WIDTH * SCREEN_HEIGHT / 10 * (LV_COLOR_DEPTH / 8));
 static uint32_t draw_buf[DRAW_BUF_SIZE / 4];
 
-static uint32_t last_dbg_ms = 0;
+static uint32_t last_refresh_ms = 0;
+static uint32_t last_btn_ui_ms = 0;
+static constexpr uint32_t REFRESH_MS = 3000;
+
+static void refresh_sd_ui() {
+  SdCardInfo info = sd_read_info();
+
+  Serial.println("---- TF Card ----");
+  if (!info.mounted) {
+    Serial.printf("Error: %s\n", info.error.c_str());
+  } else {
+    Serial.printf("Type: %s  FS: %s  Cap: %s\n", info.type, info.filesystem,
+                  format_bytes(info.card_bytes).c_str());
+  }
+
+  ui_update(info);
+}
 
 void setup() {
   Serial.begin(115200);
   delay(200);
   Serial.println();
-  Serial.printf("LVGL %d.%d.%d | touch test only\n", lv_version_major(),
+  Serial.printf("LVGL %d.%d.%d | CYD TF + Speaker\n", lv_version_major(),
                 lv_version_minor(), lv_version_patch());
 
   pinMode(TFT_BL_PIN, OUTPUT);
   digitalWrite(TFT_BL_PIN, HIGH);
 
+  // 先触摸再 SD：触控 SoftSPI 与 SD VSPI 分脚，映射勿改 touch.cpp
   touch_init();
+  audio_init();
+
   lv_init();
 
   lv_display_t *disp =
@@ -34,15 +55,30 @@ void setup() {
   lv_indev_set_display(indev, disp);
 
   ui_create();
+
+  if (!sd_init()) {
+    Serial.println("SD mount failed at boot");
+  }
+
+  refresh_sd_ui();
+  last_refresh_ms = millis();
+  last_btn_ui_ms = millis();
 }
 
 void loop() {
   lv_timer_handler();
   lv_tick_inc(5);
+  audio_tick();
 
   const uint32_t now = millis();
-  if (now - last_dbg_ms >= 50) {
-    last_dbg_ms = now;
+  if (now - last_refresh_ms >= REFRESH_MS) {
+    last_refresh_ms = now;
+    refresh_sd_ui();
+  }
+
+  if (now - last_btn_ui_ms >= 200) {
+    last_btn_ui_ms = now;
+    ui_refresh_audio_buttons();
     ui_set_touch_debug(g_dbg_logic_x, g_dbg_logic_y, g_dbg_touch_down);
   }