mirror of
https://github.com/eried/portapack-mayhem.git
synced 2024-10-01 01:26:06 -04:00
101 lines
2.1 KiB
C++
101 lines
2.1 KiB
C++
/*
|
|
* 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 */
|