Add GPIO26 speaker beep and melody test.

Play audio on boot and every 12s via the onboard amp; show status on the LVGL UI and document pins.

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

src/main.cpp

@@ -2,6 +2,7 @@
 #include <TFT_eSPI.h>
 #include <lvgl.h>
 
+#include "audio_test.h"
 #include "pins.h"
 #include "sd_info.h"
 #include "ui.h"
@@ -11,7 +12,9 @@ static constexpr uint32_t DRAW_BUF_SIZE =
 static uint32_t draw_buf[DRAW_BUF_SIZE / 4];
 
 static uint32_t last_refresh_ms = 0;
+static uint32_t last_audio_ms = 0;
 static constexpr uint32_t REFRESH_MS = 3000;
+static constexpr uint32_t AUDIO_INTERVAL_MS = 12000;
 
 static void refresh_sd_ui() {
   SdCardInfo info = sd_read_info();
@@ -31,26 +34,29 @@ static void refresh_sd_ui() {
   }
 
   ui_update(info);
+  ui_set_audio_status(audio_last_status());
 }
 
 void setup() {
   Serial.begin(115200);
   delay(200);
   Serial.println();
-  Serial.printf("LVGL %d.%d.%d | CYD TF info\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);
 
+  audio_init();
+
   lv_init();
 
   lv_display_t *disp =
       lv_tft_espi_create(SCREEN_WIDTH, SCREEN_HEIGHT, draw_buf, sizeof(draw_buf));
-  // 横屏：320x240
   lv_display_set_rotation(disp, LV_DISPLAY_ROTATION_270);
 
   ui_create();
+  ui_set_audio_status(audio_last_status());
 
   if (!sd_init()) {
     Serial.println("SD mount failed at boot");
@@ -58,6 +64,13 @@ void setup() {
 
   refresh_sd_ui();
   last_refresh_ms = millis();
+
+  // 开机立刻测喇叭
+  audio_play_beep_sequence();
+  delay(200);
+  audio_play_melody();
+  ui_set_audio_status(audio_last_status());
+  last_audio_ms = millis();
 }
 
 void loop() {
@@ -70,5 +83,11 @@ void loop() {
     refresh_sd_ui();
   }
 
+  if (now - last_audio_ms >= AUDIO_INTERVAL_MS) {
+    last_audio_ms = now;
+    audio_play_beep_sequence();
+    ui_set_audio_status(audio_last_status());
+  }
+
   delay(5);
 }