FreeCalypso > hg > fc-tourmaline
view src/cs/services/tty/tty_task.c @ 72:7bf39f5e834d
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.
| author | Mychaela Falconia <falcon@freecalypso.org> |
|---|---|
| date | Sat, 24 Oct 2020 07:39:54 +0000 |
| parents | 4e78acac3d88 |
| children |
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/** * @file tty_task.c * * Coding of the main TTY function : tty_core * This function loop in the process message function for waiting messages. * * @author Frederic Turgis (f-turgis@ti.com) & Gerard Cauvy (g-cauvy@ti.com) * @version 0.1 */ /* * History: * * Date Modification * ------------------------------------ * 01/27/2003 Create * * (C) Copyright 2003 by Texas Instruments Incorporated, All Rights Reserved */ #ifndef _WINDOWS #include "config/l1sw.cfg" #endif #include "tty/tty_env.h" #include "tty/tty_i.h" #include "rv/rv_general.h" #include "rvf/rvf_api.h" #include "rvm/rvm_use_id_list.h" #if (TRACE_TYPE == 1) || (TRACE_TYPE == 4) #ifndef _WINDOWS #include "config/sys.cfg" #include "config/chipset.cfg" #endif #include "l1_types.h" #include "l1_confg.h" #include "l1_trace.h" #endif #if (L1_GTT == 1) /* External prototype. */ extern void l1gtt_initialize(void); extern void l1gtt_exit(void); extern void l1gtt_main_processing(void); extern void l1gtt_init_trace(void); #else /* Dummy functions */ void l1gtt_initialize(void) {} void l1gtt_exit(void) {} void l1gtt_main_processing(void) {} void l1gtt_init_trace(void) {} #endif /** * @name Functions implementation * */ /*@{*/ /** * function: tty_core */ T_RV_RET tty_core(void) { BOOLEAN error_occured = FALSE; T_RV_HDR* msg_p; UINT16 received_event; TTY_SEND_TRACE("TTY TASK Started", RV_TRACE_LEVEL_DEBUG_HIGH ); l1gtt_init_trace(); /* loop to process messages */ while (error_occured == FALSE) { /* Wait for the necessary events. */ received_event = rvf_wait ( 0xffff,0); if (received_event & TTY_INIT_EVENT_MASK) { l1gtt_initialize(); } else if (received_event & TTY_EXIT_EVENT_MASK) { l1gtt_exit(); } else if (received_event & TTY_DATA_EVENT_MASK) { l1gtt_main_processing(); } } return RV_OK; }
