readme changes

 # BlueSea_OPTEK_LINK_SDK
 
 #### Description
-sdk with optek link,Initial versions include GAME, Wireless Subwoofer, and Classic Bluetooth.
+sdk with optek link,Initial versions include GAME,Wireless Subwoofer,and Classic Bluetooth.
 
 #### Software Architecture
 1. OS:freertos
 2. tasks:
+    0. app_timer_handler:   25ms loop
     1. taskStream_Rcv:      recieve stream processing for spdif source
     2. taskDec:             deocde and dsp processing
     3. task_bt_controller:  controller stack of bt processing
@@ -24,7 +25,13 @@ sdk with optek link,Initial versions include GAME, Wireless Subwoofer, and Class
 
 #### Instructions
 
-1.  xxxx
+1.  optek link:
+    1. enable macro:   OPTEK_LINK_ENABLE
+    2. Project selection: Select one of the following
+        1. OPL_MODE_SINGLE_WAY:     use optek link lib:optek_link_5ms.a
+        2. OPL_MODE_TWO_WAY:        use optek link lib:optek_link_5ms.a
+        3. OPL_MODE_SWF:            use optek link lib:optek_link_5ms_for_swf.a
+        4. OPL_MODE_WIRELESS_MIC:   use optek link lib:optek_link_5ms_for_mic.a 
 2.  xxxx
 3.  xxxx