59 rindas
1.3 KiB
C
59 rindas
1.3 KiB
C
/*
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Copyright 2013 Mathias Andersson <wraul@dbox.se>
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <avr/io.h>
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#include "backlight.h"
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/* Backlight pin configuration
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* F-row: High PB1
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* W: Low PB4
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* A: Low PB2
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* S: Low PB3
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* D: Low PD7
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*/
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void backlight_set(uint8_t level)
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{
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// Set as output.
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DDRB |= (1<<1) | (1<<2) | (1<<3) | (1<<4);
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DDRD |= (1<<7);
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// F-row
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if(level & (1<<0))
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{
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PORTB |= (1<<1);
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}
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else
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{
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PORTB &= ~(1<<1);
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}
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// WASD
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if(level & (1<<1))
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{
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PORTB &= ~(1<<4);
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PORTB &= ~(1<<2);
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PORTB &= ~(1<<3);
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PORTD &= ~(1<<7);
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}
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else
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{
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PORTB |= (1<<4);
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PORTB |= (1<<2);
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PORTB |= (1<<3);
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PORTD |= (1<<7);
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}
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}
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