backlight control on Luna: switch PWL instead of LEDB This change is preliminary toward upcoming rework of backlight control logic in our UI firmware. LEDB does not exist on Tango-based platforms (it is not brought out on Tango modules), thus turning it on and off produces absolutely no effect beyond making L1 disable deep sleep when LEDB is turned on. However, both iWOW DSK and our upcoming FC Caramel2 boards have a PWL LED, so let's switch that LED on and off to indicate the state of the UI firmware's backlight control. Note that we are NOT switching the actual Luna LCD backlight here, even though it is trivially controlled with a GPIO. The reason for this seemingly strange choice is that we don't want to turn this development board LCD backlight off until we bring the higher-level backlight control logic up to par, including new logic to "swallow" the first keypress that turns on the darkened LCD.

/************* Revision Controle System Header *************
 *                  GSM Layer 1 software
 * L1AUDIO_PROTO.H
 *
 *        Filename l1audio_proto.h
 *  Copyright 2004 (C) Texas Instruments
 *
 ************* Revision Controle System Header *************/

#if (AUDIO_TASK == 1)

#ifndef _L1AUDIO_PROTO_H_
#define _L1AUDIO_PROTO_H_

// Functions declared in l1audio_afunc.c
void l1a_audio_send_confirmation(UWORD32 SignalCode);

void l1a_audio_send_result      (UWORD32 SignalCode, xSignalHeaderRec *msg, UWORD8 queue);
#if (SPEECH_RECO)
void l1_send_sr_background_msg  (UWORD32 SignalCode);
#endif
#if (MELODY_E2)
void l1_send_melody_e2_background_msg(UWORD32 SignalCode, UWORD8  melody_id);
#endif
#endif    // _L1AUDIO_PROTO_H_

#endif    // AUDIO_TASK