1 files changed, 75 insertions, 0 deletions
diff --git a/keyboard/nerd/backlight.c b/keyboard/nerd/backlight.c
new file mode 100644
index 0000000000..804b4848a6
--- /dev/null
+++ b/keyboard/nerd/backlight.c
@@ -0,0 +1,75 @@
+/*
+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"
+
+void backlight_init_ports()
+{
+    DDRB |= 0b11100000; // PB7 (switch), PB6 (pcb), PB5 (caps)
+}
+
+void backlight_set(uint8_t level)
+{
+    (level & BACKLIGHT_SWITCH) ? backlight_switch_enable() : backlight_switch_disable();
+    (level & BACKLIGHT_PCB) ? backlight_pcb_enable() : backlight_pcb_disable();
+}
+
+void backlight_switch_enable()
+{
+    PORTB |= 0b10000000;
+}
+
+void backlight_switch_disable()
+{
+    PORTB &= ~0b10000000;
+}
+
+void backlight_switch_invert()
+{
+    PORTB ^= 0b10000000;
+}
+
+void backlight_pcb_enable()
+{
+    PORTB |= 0b01000000;
+}
+
+void backlight_pcb_disable()
+{
+    PORTB &= ~0b01000000;
+}
+
+void backlight_pcb_invert()
+{
+    PORTB ^= 0b01000000;
+}
+
+void backlight_caps_enable()
+{
+    PORTB |= 0b00100000;
+}
+
+void backlight_caps_disable()
+{
+    PORTB &= ~0b00100000;
+}
+
+void backlight_caps_invert()
+{
+    PORTB ^= 0b00100000;
+}