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/*
Copyright 2013 Mathias Andersson <wraul@dbox.se>
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 of the License, 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. If not, see <http://www.gnu.org/licenses/>.
*/
#include <avr/io.h>
#include "backlight.h"
/* Backlight pin configuration
* F-row: High PB1
* W: Low PB4
* A: Low PB2
* S: Low PB3
* D: Low PD7
*/
void backlight_set(uint8_t level)
{
// Set as output.
DDRB |= (1<<1) | (1<<2) | (1<<3) | (1<<4);
DDRD |= (1<<7);
// F-row
if(level & (1<<0))
{
PORTB |= (1<<1);
}
else
{
PORTB &= ~(1<<1);
}
// WASD
if(level & (1<<1))
{
PORTB &= ~(1<<4);
PORTB &= ~(1<<2);
PORTB &= ~(1<<3);
PORTD &= ~(1<<7);
}
else
{
PORTB |= (1<<4);
PORTB |= (1<<2);
PORTB |= (1<<3);
PORTD |= (1<<7);
}
}
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