view src/nucleus/hid.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 (2020-10-24)
parents
4e78acac3d88
children
line source
+ − /*************************************************************************/
+ − /* */
+ − /* Copyright Mentor Graphics Corporation 2002 */
+ − /* All Rights Reserved. */
+ − /* */
+ − /* THIS WORK CONTAINS TRADE SECRET AND PROPRIETARY INFORMATION WHICH IS */
+ − /* THE PROPERTY OF MENTOR GRAPHICS CORPORATION OR ITS LICENSORS AND IS */
+ − /* SUBJECT TO LICENSE TERMS. */
+ − /* */
+ − /*************************************************************************/
+ −
+ − /*************************************************************************/
+ − /* */
+ − /* FILE NAME VERSION */
+ − /* */
+ − /* hid.c Nucleus PLUS 1.14 */
+ − /* */
+ − /* COMPONENT */
+ − /* */
+ − /* HI - History Management */
+ − /* */
+ − /* DESCRIPTION */
+ − /* */
+ − /* This file contains global data structures for use within the */
+ − /* History Management component. */
+ − /* */
+ − /* DATA STRUCTURES */
+ − /* */
+ − /* HID_History_Enable History saving enabled flag */
+ − /* HID_Write_Index Current write index into */
+ − /* history table */
+ − /* HID_Read_Index Current read index into */
+ − /* history table */
+ − /* HID_Entry_Count Number of entries in the */
+ − /* table counter */
+ − /* HID_History_Protect History protection */
+ − /* */
+ − /* FUNCTIONS */
+ − /* */
+ − /* None */
+ − /* */
+ − /* DEPENDENCIES */
+ − /* */
+ − /* hi_defs.h History Management constants */
+ − /* */
+ − /* HISTORY */
+ − /* */
+ − /* DATE REMARKS */
+ − /* */
+ − /* 03-01-1993 Created initial version 1.0 */
+ − /* 04-19-1993 Verified version 1.0 */
+ − /* 03-01-1994 Updated copyright notice, */
+ − /* resulting in version 1.1 */
+ − /* */
+ − /* 03-18-1994 Verified version 1.1 */
+ − /* 04-17-1996 updated to version 1.2 */
+ − /* 03-24-1998 Released version 1.3 */
+ − /* 03-26-1999 Released 1.11m (new release */
+ − /* numbering scheme) */
+ − /* 04-17-2002 Released version 1.13m */
+ − /* 11-07-2002 Released version 1.14 */
+ − /*************************************************************************/
+ − #define NU_SOURCE_FILE
+ −
+ − #include "hi_defs.h" /* History constants */
+ −
+ −
+ − /* HID_History_Enable is a flag that indicates whether or not history saving
+ − is enabled. If this value is NU_FALSE, history saving is disabled.
+ − Otherwise, history saving is enabled. */
+ −
+ − INT HID_History_Enable;
+ −
+ −
+ − /* HID_Write_Index is the index of the next available entry in the history
+ − table. */
+ −
+ − INT HID_Write_Index;
+ −
+ −
+ − /* HID_Read_Index is the index of the oldest entry in the history table. */
+ −
+ − INT HID_Read_Index;
+ −
+ −
+ − /* HID_Entry_Count keeps track of the number of entries currently
+ − in the history table. */
+ −
+ − INT HID_Entry_Count;
+ −
+ −
+ − /* HID_History_Protect is a protection structure used to block any other
+ − thread from access to the history data structures. */
+ −
+ − TC_PROTECT HID_History_Protect;
+ −
+ −
+ −
+ −