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-rw-r--r--keyboard/lightsaber/backlight.c86
1 files changed, 86 insertions, 0 deletions
diff --git a/keyboard/lightsaber/backlight.c b/keyboard/lightsaber/backlight.c
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+++ b/keyboard/lightsaber/backlight.c
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+/*
+Copyright 2014 Ralf Schmitt <ralf@bunkertor.net>
+
+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
+ *
+ * Alphas PB1 (high)
+ * Numeric PB2 (high)
+ * Mod+Num PB3 (high)
+ * Backside PD6 (high)
+ * TopRight PD7 (low)
+ * F-Row PE6 (high)
+ */
+
+void backlight_set(uint8_t level)
+{
+ // Set as output.
+ DDRB |= (1<<1) | (1<<2) | (1<<3);
+ DDRD |= (1<<6) | (1<<7);
+ DDRE |= (1<<6);
+
+ if (level & BACKLIGHT_ALPHA)
+ {
+ PORTB |= (1<<1);
+ }
+ else
+ {
+ PORTB &= ~(1<<1);
+ }
+ if (level & BACKLIGHT_NUMERIC)
+ {
+ PORTB |= (1<<2);
+ }
+ else
+ {
+ PORTB &= ~(1<<2);
+ }
+ if (level & BACKLIGHT_MODNUM)
+ {
+ PORTB |= (1<<3);
+ }
+ else
+ {
+ PORTB &= ~(1<<3);
+ }
+ if (level & BACKLIGHT_BACKSIDE)
+ {
+ PORTD |= (1<<6);
+ }
+ else
+ {
+ PORTD &= ~(1<<6);
+ }
+ if (level & BACKLIGHT_TOPRIGHT)
+ {
+ PORTD &= ~(1<<7);
+ }
+ else
+ {
+ PORTD |= (1<<7);
+ }
+ if (level & BACKLIGHT_FROW)
+ {
+ PORTE |= (1<<6);
+ }
+ else
+ {
+ PORTE &= ~(1<<6);
+ }
+}