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Backlight: Add abstraction for support of different hardware.

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This commit is contained in:
Jared Boone 2017-07-18 21:29:32 -07:00
parent e695d496c5
commit aa189a3462
7 changed files with 240 additions and 5 deletions
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100
firmware/common/backlight.cpp Normal file
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/*
* Copyright (C) 2017 Jared Boone, ShareBrained Technology, Inc.
*
* This file is part of PortaPack.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, Inc., 51 Franklin Street,
* Boston, MA 02110-1301, USA.
*/
#include "backlight.hpp"
#include "portapack_io.hpp"
namespace portapack {
void BacklightOnOff::on() {
if( !is_on() ) {
io.lcd_backlight(true);
on_ = true;
}
}
void BacklightOnOff::off() {
if( is_on() ) {
io.lcd_backlight(false);
on_ = false;
}
}
void BacklightCAT4004::set_level(const value_t value) {
auto target = value;
// Clip target value to valid range.
if( target < 0 ) {
target = 0;
}
if( target > maximum_level ) {
target = maximum_level;
}
if( is_on() ) {
pulses(target);
} else {
level_ = target;
}
}
void BacklightCAT4004::on() {
if( !is_on() ) {
io.lcd_backlight(true);
halPolledDelay(ticks_setup);
on_ = true;
// Just enabled driver, initial value is maximum.
const auto target_level = level();
level_ = maximum_level;
pulses(target_level);
}
}
void BacklightCAT4004::off() {
if( is_on() ) {
io.lcd_backlight(false);
chThdSleepMilliseconds(ms_pwrdwn);
on_ = false;
}
}
void BacklightCAT4004::pulses(value_t target) {
while(level() != target) {
pulse();
}
}
void BacklightCAT4004::pulse() {
io.lcd_backlight(false);
halPolledDelay(ticks_lo);
io.lcd_backlight(true);
halPolledDelay(ticks_hi);
level_ -= 1;
if( level_ < 0 ) {
level_ = levels() - 1;
}
}
} /* namespace portapack */