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/* Copyright 2020 zvecr<git@zvecr.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 "led.h"
#include "host.h"
#include "timer.h"
#include "debug.h"
#include "gpio.h"
#ifdef BACKLIGHT_CAPS_LOCK
# ifdef BACKLIGHT_ENABLE
# include "backlight.h"
extern backlight_config_t backlight_config;
# else
# pragma message "Cannot use BACKLIGHT_CAPS_LOCK without backlight being enabled"
# undef BACKLIGHT_CAPS_LOCK
# endif
#endif
#ifndef LED_PIN_ON_STATE
# define LED_PIN_ON_STATE 1
#endif
#ifdef BACKLIGHT_CAPS_LOCK
/** \brief Caps Lock indicator using backlight (for keyboards without dedicated LED)
*/
static void handle_backlight_caps_lock(led_t led_state) {
// Use backlight as Caps Lock indicator
uint8_t bl_toggle_lvl = 0;
if (led_state.caps_lock && !backlight_config.enable) {
// Turning Caps Lock ON and backlight is disabled in config
// Toggling backlight to the brightest level
bl_toggle_lvl = BACKLIGHT_LEVELS;
} else if (!led_state.caps_lock && backlight_config.enable) {
// Turning Caps Lock OFF and backlight is enabled in config
// Toggling backlight and restoring config level
bl_toggle_lvl = backlight_config.level;
}
// Set level without modify backlight_config to keep ability to restore state
backlight_set(bl_toggle_lvl);
}
#endif
static uint32_t last_led_modification_time = 0;
uint32_t last_led_activity_time(void) {
return last_led_modification_time;
}
uint32_t last_led_activity_elapsed(void) {
return timer_elapsed32(last_led_modification_time);
}
/** \brief Lock LED set callback - keymap/user level
*
* \deprecated Use led_update_user() instead.
*/
__attribute__((weak)) void led_set_user(uint8_t usb_led) {}
/** \brief Lock LED update callback - keymap/user level
*
* \return True if led_update_kb() should run its own code, false otherwise.
*/
__attribute__((weak)) bool led_update_user(led_t led_state) {
return true;
}
/** \brief Lock LED update callback - keyboard level
*
* \return Ignored for now.
*/
__attribute__((weak)) bool led_update_kb(led_t led_state) {
bool res = led_update_user(led_state);
if (res) {
led_update_ports(led_state);
}
return res;
}
/** \brief Write LED state to hardware
*/
__attribute__((weak)) void led_update_ports(led_t led_state) {
#if LED_PIN_ON_STATE == 0
// invert the whole thing to avoid having to conditionally !led_state.x later
led_state.raw = ~led_state.raw;
#endif
#ifdef LED_NUM_LOCK_PIN
gpio_write_pin(LED_NUM_LOCK_PIN, led_state.num_lock);
#endif
#ifdef LED_CAPS_LOCK_PIN
gpio_write_pin(LED_CAPS_LOCK_PIN, led_state.caps_lock);
#endif
#ifdef LED_SCROLL_LOCK_PIN
gpio_write_pin(LED_SCROLL_LOCK_PIN, led_state.scroll_lock);
#endif
#ifdef LED_COMPOSE_PIN
gpio_write_pin(LED_COMPOSE_PIN, led_state.compose);
#endif
#ifdef LED_KANA_PIN
gpio_write_pin(LED_KANA_PIN, led_state.kana);
#endif
}
/** \brief Initialise any LED related hardware and/or state
*/
__attribute__((weak)) void led_init_ports(void) {
#ifdef LED_NUM_LOCK_PIN
gpio_set_pin_output(LED_NUM_LOCK_PIN);
gpio_write_pin(LED_NUM_LOCK_PIN, !LED_PIN_ON_STATE);
#endif
#ifdef LED_CAPS_LOCK_PIN
gpio_set_pin_output(LED_CAPS_LOCK_PIN);
gpio_write_pin(LED_CAPS_LOCK_PIN, !LED_PIN_ON_STATE);
#endif
#ifdef LED_SCROLL_LOCK_PIN
gpio_set_pin_output(LED_SCROLL_LOCK_PIN);
gpio_write_pin(LED_SCROLL_LOCK_PIN, !LED_PIN_ON_STATE);
#endif
#ifdef LED_COMPOSE_PIN
gpio_set_pin_output(LED_COMPOSE_PIN);
gpio_write_pin(LED_COMPOSE_PIN, !LED_PIN_ON_STATE);
#endif
#ifdef LED_KANA_PIN
gpio_set_pin_output(LED_KANA_PIN);
gpio_write_pin(LED_KANA_PIN, !LED_PIN_ON_STATE);
#endif
}
/** \brief Entrypoint for protocol to LED binding
*/
__attribute__((weak)) void led_set(uint8_t usb_led) {
#ifdef BACKLIGHT_CAPS_LOCK
handle_backlight_caps_lock((led_t)usb_led);
#endif
led_set_user(usb_led);
led_update_kb((led_t)usb_led);
}
/** \brief Trigger behaviour on transition to suspend
*/
void led_suspend(void) {
led_t leds_off = {0};
#ifdef BACKLIGHT_CAPS_LOCK
if (is_backlight_enabled()) {
// Don't try to turn off Caps Lock indicator as it is backlight and backlight is already off
leds_off.caps_lock = true;
}
#endif
led_set(leds_off.raw);
}
/** \brief Trigger behaviour on transition from suspend
*/
void led_wakeup(void) {
led_set(host_keyboard_leds());
}
/** \brief set host led state
*
* Only sets state if change detected
*/
void led_task(void) {
static uint8_t last_led_status = 0;
// update LED
uint8_t led_status = host_keyboard_leds();
if (last_led_status != led_status) {
last_led_status = led_status;
last_led_modification_time = timer_read32();
if (debug_keyboard) {
dprintf("led_task: %02X\n", led_status);
}
led_set(led_status);
}
}
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