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/*
Copyright 2021 Robin Haberkorn <robin.haberkorn@googlemail.com>
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 <stdint.h>
#include <avr/io.h>
#include "debug.h"
#include "keyclick.h"
#include "led.h"
#include "pwm.h"
void led_set(uint8_t usb_led)
{
dprintf("Set keyboard LEDs: 0x%02X\n", usb_led);
/*
* All LEDs and the buzzer are output pins obviously, even for PWM operation
*/
DDRD |= 0b00001111;
DDRB |= 0b11110000;
/* LED right next to the Capslock key (C99) */
if (usb_led & (1 << USB_LED_CAPS_LOCK))
PORTD &= ~(1 << PD3);
else
PORTD |= (1 << PD3);
/* 1st LED on first row (G00). */
pwm_pb5_set_led(usb_led & (1 << USB_LED_NUM_LOCK) ? 255 : 0);
/* 2nd LED on first row (G01): Highlight keyclick mode. */
pwm_pd1_set_led(keyclick_mode*255/(KEYCLICK_MAX-1));
/* 3rd LED on the first row (G02) */
pwm_pb7_set_led(usb_led & (1 << USB_LED_COMPOSE) ? 255 : 0);
/*
* 4th LED (G03) are currently not triggerable via USB.
* Could be triggered as the "backlight".
*/
pwm_pb4_set_led(0);
/* 5th LED on the first row (G04) */
pwm_pb6_set_led(usb_led & (1 << USB_LED_SCROLL_LOCK) ? 255 : 0);
/*
* 6th LED on the first row (G53).
*
* Triggering this LED (PD2) will also enable the buzzer (PD0),
* so we have got a way to beep from userspace (see ./k7637-beep.sh).
*
* The original firmware also had the error display on G53
* (cf. Betriebsdokumentation).
*/
if (usb_led & (1 << USB_LED_KANA)) {
PORTD &= ~(1 << PD2);
pwm_pd0_set_tone(2200);
} else {
PORTD |= (1 << PD2);
pwm_pd0_set_tone(0);
}
}
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