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annotate src/g23m-aci/gdd_dio/gdd_dio_kerf.c @ 72:7bf39f5e834d

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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 fa8dc04885d8
children
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1 /*
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2 +-----------------------------------------------------------------------------
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3 | File : gdd_dio_kerf.c
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4 +-----------------------------------------------------------------------------
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5 | Copyright 2002 Texas Instruments Berlin, AG
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6 | All rights reserved.
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7 |
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8 | This file is confidential and a trade secret of Texas
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9 | Instruments Berlin, AG
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10 | The receipt of or possession of this file does not convey
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11 | any rights to reproduce or disclose its contents or to
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12 | manufacture, use, or sell anything it may describe, in
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13 | whole, or in part, without the specific written consent of
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14 | Texas Instruments Berlin, AG.
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15 +-----------------------------------------------------------------------------
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16 | Purpose : This modul is part of the entity gdd_dio and implements the
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17 | kernel service functions.
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18 +-----------------------------------------------------------------------------
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19 */
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22 #define ENTITY_GDD_DIO
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24 /*==== INCLUDES =============================================================*/
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25
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26 #include "typedefs.h" /* to get Condat data types */
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27 #include "vsi.h" /* to get a lot of macros */
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28 #include "prim.h" /* to get the definitions of used SAP and directions */
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29 #include "dti.h"
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30 #include "gdd_dio.h" /* to get the global entity definitions */
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33 /*==== CONST ================================================================*/
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35 /*==== LOCAL VARS ===========================================================*/
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36
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37 /*==== PRIVATE FUNCTIONS ====================================================*/
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38
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39 /*==== PUBLIC FUNCTIONS =====================================================*/
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42 /*
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43 +------------------------------------------------------------------------------
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44 | Function : ker_init
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45 +------------------------------------------------------------------------------
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46 | Description : The function ker_init() initializes the state of the
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47 | kernel service. The state of DIO is initialized independently
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48 | when dio_init_bat() is called.
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49 +------------------------------------------------------------------------------
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50 */
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51 GLOBAL int gdd_dio_ker_init ()
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52 {
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53 TRACE_FUNCTION( "ker_init" );
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54
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55 /* Nothing to do currently. The state of each kernel
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56 (gdd_dio_data_base[<instance>].ker.state is static and automatically
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57 set to GDD_DIO_KER_DEAD on start-up. */
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58
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59 return 1;
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60 } /* ker_init() */