keyboard/nerd/backlight.c

   1 /*
   2 Copyright 2014 Ralf Schmitt <ralf@bunkertor.net>
   3
   4 This program is free software: you can redistribute it and/or modify
   5 it under the terms of the GNU General Public License as published by
   6 the Free Software Foundation, either version 2 of the License, or
   7 (at your option) any later version.
   8
   9 This program is distributed in the hope that it will be useful,
  10 but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16 */
  17
  18 #include <avr/io.h>
  19 #include "backlight.h"
  20 #include "led.h"
  21
  22 void backlight_init_ports()
  23 {
  24     DDRB |= 0b11100000; // PB7 (switch), PB6 (pcb), PB5 (caps)
  25 }
  26
  27 void led_set(uint8_t usb_led)
  28 {
  29     (usb_led & (1<<USB_LED_CAPS_LOCK)) ? backlight_caps_enable() : backlight_caps_disable();
  30 }
  31
  32 void backlight_set(uint8_t level)
  33 {
  34     (level & BACKLIGHT_SWITCH) ? backlight_switch_enable() : backlight_switch_disable();
  35     (level & BACKLIGHT_PCB) ? backlight_pcb_enable() : backlight_pcb_disable();
  36 }
  37
  38 void backlight_switch_enable()
  39 {
  40     PORTB |= 0b10000000;
  41 }
  42
  43 void backlight_switch_disable()
  44 {
  45     PORTB &= ~0b10000000;
  46 }
  47
  48 void backlight_switch_invert()
  49 {
  50     PORTB ^= 0b10000000;
  51 }
  52
  53 void backlight_pcb_enable()
  54 {
  55     PORTB |= 0b01000000;
  56 }
  57
  58 void backlight_pcb_disable()
  59 {
  60     PORTB &= ~0b01000000;
  61 }
  62
  63 void backlight_pcb_invert()
  64 {
  65     PORTB ^= 0b01000000;
  66 }
  67
  68 void backlight_caps_enable()
  69 {
  70     PORTB |= 0b00100000;
  71 }
  72
  73 void backlight_caps_disable()
  74 {
  75     PORTB &= ~0b00100000;
  76 }
  77
  78 void backlight_caps_invert()
  79 {
  80     PORTB ^= 0b00100000;
  81 }