fix(led): keep app chord lights when strumming during sing-along

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

Global/Global.c

@@ -113,6 +113,23 @@ uint8_t TOUCH_AREA_NUM = (sizeof(Touch_Areas)/sizeof(Touch_AreaTypeDef));
 
 const uint8_t Version[3] = {0,2,52}; /* major.minor.patch — 0.2.52: 开机 Logo 保持到彩灯结束再进模式选择 */
 uint8_t Led = 8;
+/* App 已下发琴颈引导灯：拨片勿再全绿盖掉 */
+static uint8_t s_app_neck_led = 0;
+
+void AppNeckLed_NoteGuide(void)
+{
+  s_app_neck_led = 1;
+}
+
+void AppNeckLed_ClearGuide(void)
+{
+  s_app_neck_led = 0;
+}
+
+uint8_t AppNeckLed_IsGuide(void)
+{
+  return s_app_neck_led;
+}
 bool PressFlag = 0;
 
 void Return_Light_buff(uint8_t key_id_1629);
@@ -1836,8 +1853,9 @@ void Pick_Handle()
           {
           uint8_t session_was_on = StartFlag ? 1u : 0u;
           StartFlag = 1;
-          /* 普通：播放中指板 LED 全绿，关闭走向灯刷新 */
-          app_tm1629_all_on(LED_COLOR_G);
+          /* 普通：播放中指板 LED 全绿。App 弹唱正在引导时不要盖成全绿。 */
+          if (!AppNeckLed_IsGuide())
+            app_tm1629_all_on(LED_COLOR_G);
           if (mGuiData[GUI_AUTOBAND_SW].Current)
           {
               /* 播放中再拨：Stop+Start 重启段落；冷启动前也先 Stop 清残留 */
@@ -1959,6 +1977,7 @@ void BL_Set_led(uint8_t led, uint8_t chord_type)
    * 导致 UI 与 MIDI 发声不一致；和弦品质仅由映射页 02 03/02 04 维护。 */
   (void)chord_type;
   Led = led;
+  AppNeckLed_NoteGuide();
   tm1629_set_identity_led((LedNum_TypeDef)led);
 }
 

Global/Global.h

@@ -270,6 +270,10 @@ void Band_EndStartFollowup(void);     /* 兼容空操作 */
 
 
 void BL_Set_led(uint8_t Led, uint8_t chord_type);
+/* App 曲目引导灯有效时，拨片不要把琴颈打成全绿 */
+void AppNeckLed_NoteGuide(void);
+void AppNeckLed_ClearGuide(void);
+uint8_t AppNeckLed_IsGuide(void);
 
 uint8_t GetChordNotesByType(uint8_t MIDI_Index,uint8_t type,uint8_t *buff);
 /* 伴奏已在播时仅更新和弦音，不 Restart（快转调） */

protocol/bl_uart_parse.c

@@ -615,6 +615,7 @@ static void handleDevDisconnect(uint8_t *data)
 {
     uint8_t resp[6] = {0xF0, 0x60, 0x01, 0x00, 0x01, 0xF7};
     (void)data;
+    AppNeckLed_ClearGuide();
     USART4_SendData(resp, sizeof(resp));
 }