Support for Lightpad keypad

keyboard/lightpad/backlight.c

@@ -0,0 +1,129 @@
+/*
+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
+ *
+ * FN1       PB0 (low)
+ * FN2       PB5 (low)
+ * FN3       PB4 (low)
+ * FN4       PD7 (low)
+ * REAR      PD6 (high)
+ * NUMPAD    PB2 (high)
+ * NUMLOCK   PB1 (low)
+ */
+void backlight_init_ports() {
+    DDRB |= (1<<0) | (1<<1) | (1<<2) | (1<<4) | (1<<5);
+    DDRD |= (1<<6) | (1<<7);
+
+    backlight_disable_numlock();
+}
+
+void backlight_set(uint8_t level) {
+    (level & BACKLIGHT_FN1) ? backlight_enable_fn1() : backlight_disable_fn1();
+    (level & BACKLIGHT_FN2) ? backlight_enable_fn2() : backlight_disable_fn2();
+    (level & BACKLIGHT_FN3) ? backlight_enable_fn3() : backlight_disable_fn3();
+    (level & BACKLIGHT_FN4) ? backlight_enable_fn4() : backlight_disable_fn4();
+    (level & BACKLIGHT_NUMPAD) ? backlight_enable_numpad() : backlight_disable_numpad();
+    (level & BACKLIGHT_REAR) ? backlight_enable_rear() : backlight_disable_rear();
+}
+
+void backlight_enable_fn1() {
+    PORTB &= ~(1<<0);
+}
+
+void backlight_disable_fn1() {
+    PORTB |= (1<<0);
+}
+
+void backlight_invert_fn1() {
+    PORTB ^= (1<<0);
+}
+
+void backlight_enable_fn2() {
+    PORTB &= ~(1<<5);
+}
+
+void backlight_disable_fn2() {
+    PORTB |= (1<<5);
+}
+
+void backlight_invert_fn2() {
+    PORTB ^= (1<<5);
+}
+
+void backlight_enable_fn3() {
+    PORTB &= ~(1<<4);
+}
+
+void backlight_disable_fn3() {
+    PORTB |= (1<<4);
+}
+
+void backlight_invert_fn3() {
+    PORTB ^= (1<<4);
+}
+
+void backlight_enable_fn4() {
+    PORTD &= ~(1<<7);
+}
+
+void backlight_disable_fn4() {
+    PORTD |= (1<<7);
+}
+
+void backlight_invert_fn4() {
+    PORTD ^= (1<<7);
+}
+
+void backlight_enable_numpad() {
+    PORTB |= (1<<2);
+}
+
+void backlight_disable_numpad() {
+    PORTB &= ~(1<<2);
+}
+
+void backlight_invert_numpad() {
+    PORTB ^= (1<<2);
+}
+
+void backlight_enable_numlock() {
+    PORTB &= ~(1<<1);
+}
+
+void backlight_disable_numlock() {
+    PORTB |= (1<<1);
+}
+
+void backlight_invert_numlock() {
+    PORTB ^= (1<<1);
+}
+
+void backlight_enable_rear() {
+    PORTD |= (1<<6);
+}
+
+void backlight_disable_rear() {
+    PORTD &= ~(1<<6);
+}
+
+void backlight_invert_rear() {
+    PORTD ^= (1<<6);
+}