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- /*
- Copyright 2013 Mathias Andersson <[email protected]>
-
- 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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