fix(change mode):increase delay to wait bt ativity stop

@@ -590,7 +590,7 @@ U8 app_nav_media_finish(void)
 
 			if (hci_A2DP_conn_present() == TRUE)
 			{
-				app_main_data.media = MEDIA_UNKNOWN;		//when finish, not BtHCI_disconn() discover and page on
+				//app_main_data.media = MEDIA_UNKNOWN;		//when finish, not BtHCI_disconn() discover and page on
 				
 				bt_hci_flush();
 				delayms(200);

@@ -121,7 +121,7 @@
 #define BT_PA_ENABLE
 
 /***********************OPTEK LINK 2.0******************************/
-//#define OPTEK_LINK_ENABLE
+#define OPTEK_LINK_ENABLE
 
 #ifdef OPTEK_LINK_ENABLE
 

@@ -589,6 +589,8 @@ void csbm_put_tx_unencoded_data(short *ptr,U16 len)
 #endif
 }
 
+
+/* note that this function only run in keyfunction task */
 void app_optek_link_role_sw(void)
 {
 	if (app_main_data.share_link_role == SL_ROLE_SLAVE)
@@ -597,17 +599,31 @@ void app_optek_link_role_sw(void)
 		app_dac_receive_pcm_enable(FALSE);
 		app_nav_bt_codec_reinit();
 		optek_link_role_stop();	
-		//app_bt_conn_code_text_copy();
 
-		bt_flash_set_multi_room_role(SL_ROLE_MASTER);
+		bt_flash_set_multi_room_role(SL_ROLE_BT);
 	}
 	else if (app_main_data.share_link_role == SL_ROLE_MASTER)
 	{
 		optek_link_role_stop();			
 		bt_flash_set_multi_room_role(SL_ROLE_SLAVE);
 	}
-	else 
+	else if (app_main_data.share_link_role == SL_ROLE_BT)
+	{
+		if (hci_A2DP_conn_present() == TRUE)
+		{
+			bt_hci_flush();
+			delayms(200);
+		}
+
+		app_bt_set_scan_enable_mode(enBT_BOTH_SCAN_DISABLE);
+		delayms(100);
+		
+		bt_flash_set_multi_room_role(SL_ROLE_SLAVE);
+	}
+	else
+	{
 		bt_flash_set_multi_room_role(SL_ROLE_SLAVE);
+	}
 
 	//watchdog reset
 	TX_DISABLE;
@@ -1477,7 +1493,7 @@ void optek_link_role_stop(void)
 		DBG_Printf("optek_link_role_stop\n\r");
 		kBtHCI_optek_link_enable(0, OPTEK_LINK_H1);
 		optek_link_enable = FALSE;
-		delayms(50);
+		delayms(100);//wait stop complete
 	}
 }