475 lines
12 KiB
C
475 lines
12 KiB
C
/* Copyright 2018 Jason Williams (Wilba)
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include "wt_mono_backlight.h"
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#include "wt_rgb_backlight_api.h" // reuse these for now
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#include "wt_rgb_backlight_keycodes.h" // reuse these for now
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#include <stdlib.h>
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#include <avr/interrupt.h>
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#include "i2c_master.h"
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#include "host.h"
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#include "progmem.h"
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#include "eeprom.h"
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#include "via.h" // uses EEPROM address, lighting value IDs
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#define MONO_BACKLIGHT_CONFIG_EEPROM_ADDR (VIA_EEPROM_CUSTOM_CONFIG_ADDR)
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#if VIA_EEPROM_CUSTOM_CONFIG_SIZE == 0
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#error VIA_EEPROM_CUSTOM_CONFIG_SIZE was not defined to store backlight_config struct
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#endif
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#include "drivers/led/issi/is31fl3736-mono.h"
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#define BACKLIGHT_EFFECT_MAX 3
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#ifndef MONO_BACKLIGHT_COLOR_1
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#define MONO_BACKLIGHT_COLOR_1 { .h = 0, .s = 255 }
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#endif
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backlight_config g_config = {
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.disable_when_usb_suspended = MONO_BACKLIGHT_DISABLE_WHEN_USB_SUSPENDED,
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.disable_after_timeout = MONO_BACKLIGHT_DISABLE_AFTER_TIMEOUT,
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.brightness = MONO_BACKLIGHT_BRIGHTNESS,
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.effect = MONO_BACKLIGHT_EFFECT,
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.effect_speed = MONO_BACKLIGHT_EFFECT_SPEED,
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.color_1 = MONO_BACKLIGHT_COLOR_1,
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};
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bool g_suspend_state = false;
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// Global tick at 20 Hz
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uint32_t g_tick = 0;
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// Ticks since any key was last hit.
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uint32_t g_any_key_hit = 0;
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void backlight_init_drivers(void)
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{
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is31fl3736_init_drivers();
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}
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void backlight_set_key_hit(uint8_t row, uint8_t column)
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{
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g_any_key_hit = 0;
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}
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// This is (F_CPU/1024) / 20 Hz
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// = 15625 Hz / 20 Hz
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// = 781
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#define TIMER3_TOP 781
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void backlight_timer_init(void)
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{
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static uint8_t backlight_timer_is_init = 0;
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if ( backlight_timer_is_init ) {
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return;
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}
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backlight_timer_is_init = 1;
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// Timer 3 setup
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TCCR3B = _BV(WGM32) | // CTC mode OCR3A as TOP
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_BV(CS32) | _BV(CS30); // prescale by /1024
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// Set TOP value
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uint8_t sreg = SREG;
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cli();
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OCR3AH = (TIMER3_TOP >> 8) & 0xff;
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OCR3AL = TIMER3_TOP & 0xff;
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SREG = sreg;
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}
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void backlight_timer_enable(void)
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{
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TIMSK3 |= _BV(OCIE3A);
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}
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void backlight_timer_disable(void)
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{
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TIMSK3 &= ~_BV(OCIE3A);
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}
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void backlight_set_suspend_state(bool state)
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{
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g_suspend_state = state;
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}
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void backlight_set_brightness_all( uint8_t value )
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{
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is31fl3736_set_value_all( value );
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}
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void backlight_effect_all_off(void)
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{
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is31fl3736_set_value_all( 0 );
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}
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void backlight_effect_all_on(void)
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{
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is31fl3736_set_value_all( g_config.brightness );
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}
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void backlight_effect_raindrops(bool initialize)
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{
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// Change one LED every tick
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uint8_t led_to_change = ( g_tick & 0x000 ) == 0 ? rand() % 96 : 255;
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for ( int i=0; i<96; i++ )
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{
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// If initialize, all get set to random brightness
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// If not, all but one will stay the same as before.
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if ( initialize || i == led_to_change )
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{
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is31fl3736_set_value(i, rand() & 0xFF );
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}
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}
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}
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void backlight_effect_cycle_all(void)
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{
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uint8_t offset = ( g_tick << g_config.effect_speed ) & 0xFF;
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backlight_set_brightness_all( offset );
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}
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// This runs after another backlight effect and replaces
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// colors already set
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void backlight_effect_indicators(void)
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{
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#if defined(MONO_BACKLIGHT_WT75_A)
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HSV hsv = { .h = g_config.color_1.h, .s = g_config.color_1.s, .v = g_config.brightness };
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RGB rgb = hsv_to_rgb( hsv );
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// SW7,CS8 = (6*8+7) = 55
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// SW8,CS8 = (7*8+7) = 63
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// SW9,CS8 = (8*8+7) = 71
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is31fl3736_set_value(55, rgb.r);
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is31fl3736_set_value(63, rgb.g);
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is31fl3736_set_value(71, rgb.b);
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#endif // MONO_BACKLIGHT_WT75_A
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// This pairs with "All Off" already setting zero brightness,
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// and "All On" already setting non-zero brightness.
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#if defined(MONO_BACKLIGHT_WT60_A) || \
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defined(MONO_BACKLIGHT_WT65_A) || \
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defined(MONO_BACKLIGHT_WT65_B) || \
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defined(MONO_BACKLIGHT_WT75_A) || \
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defined(MONO_BACKLIGHT_WT75_B) || \
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defined(MONO_BACKLIGHT_WT75_C) || \
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defined(MONO_BACKLIGHT_WT80_A)
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if ( host_keyboard_led_state().caps_lock ) {
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// SW3,CS1 = (2*8+0) = 16
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is31fl3736_set_value(16, 255);
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}
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#endif
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#if defined(MONO_BACKLIGHT_WT80_A)
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if ( host_keyboard_led_state().scroll_lock ) {
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// SW7,CS7 = (6*8+6) = 54
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is31fl3736_set_value(54, 255);
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}
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#endif
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#if defined(MONO_BACKLIGHT_WT75_C)
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if ( host_keyboard_led_state().scroll_lock ) {
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// SW7,CS8 = (6*8+7) = 55
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is31fl3736_set_value(55, 255);
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}
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#endif
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}
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ISR(TIMER3_COMPA_vect)
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{
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// delay 1 second before driving LEDs or doing anything else
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static uint8_t startup_tick = 0;
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if ( startup_tick < 20 ) {
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startup_tick++;
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return;
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}
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g_tick++;
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if ( g_any_key_hit < 0xFFFFFFFF )
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{
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g_any_key_hit++;
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}
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// Ideally we would also stop sending zeros to the LED driver PWM buffers
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// while suspended and just do a software shutdown. This is a cheap hack for now.
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bool suspend_backlight = ((g_suspend_state && g_config.disable_when_usb_suspended) ||
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(g_config.disable_after_timeout > 0 && g_any_key_hit > g_config.disable_after_timeout * 60 * 20));
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uint8_t effect = suspend_backlight ? 0 : g_config.effect;
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// Keep track of the effect used last time,
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// detect change in effect, so each effect can
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// have an optional initialization.
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static uint8_t effect_last = 255;
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bool initialize = effect != effect_last;
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effect_last = effect;
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// this gets ticked at 20 Hz.
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// each effect can opt to do calculations
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// and/or request PWM buffer updates.
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switch ( effect )
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{
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case 0:
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backlight_effect_all_off();
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break;
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case 1:
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backlight_effect_all_on();;
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break;
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case 2:
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backlight_effect_raindrops(initialize);
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break;
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default:
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backlight_effect_all_off();
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break;
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}
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if ( ! suspend_backlight )
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{
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backlight_effect_indicators();
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}
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}
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// Some helpers for setting/getting HSV
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void _set_color( HS *color, uint8_t *data )
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{
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color->h = data[0];
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color->s = data[1];
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}
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void _get_color( HS *color, uint8_t *data )
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{
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data[0] = color->h;
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data[1] = color->s;
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}
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void backlight_config_set_value( uint8_t *data )
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{
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bool reinitialize = false;
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uint8_t *value_id = &(data[0]);
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uint8_t *value_data = &(data[1]);
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switch ( *value_id )
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{
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case id_disable_when_usb_suspended:
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{
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g_config.disable_when_usb_suspended = (bool)*value_data;
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break;
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}
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case id_disable_after_timeout:
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{
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g_config.disable_after_timeout = *value_data;
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break;
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}
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case id_brightness:
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{
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g_config.brightness = *value_data;
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break;
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}
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case id_effect:
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{
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g_config.effect = *value_data;
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break;
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}
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case id_effect_speed:
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{
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g_config.effect_speed = *value_data;
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break;
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}
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case id_color_1:
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{
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_set_color( &(g_config.color_1), value_data );
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break;
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}
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}
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if ( reinitialize )
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{
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backlight_init_drivers();
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}
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}
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void backlight_config_get_value( uint8_t *data )
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{
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uint8_t *value_id = &(data[0]);
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uint8_t *value_data = &(data[1]);
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switch ( *value_id )
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{
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case id_disable_when_usb_suspended:
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{
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*value_data = ( g_config.disable_when_usb_suspended ? 1 : 0 );
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break;
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}
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case id_disable_after_timeout:
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{
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*value_data = g_config.disable_after_timeout;
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break;
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}
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case id_brightness:
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{
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*value_data = g_config.brightness;
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break;
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}
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case id_effect:
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{
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*value_data = g_config.effect;
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break;
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}
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case id_effect_speed:
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{
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*value_data = g_config.effect_speed;
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break;
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}
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case id_color_1:
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{
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_get_color( &(g_config.color_1), value_data );
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break;
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}
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}
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}
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void backlight_config_load(void)
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{
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eeprom_read_block( &g_config, ((void*)MONO_BACKLIGHT_CONFIG_EEPROM_ADDR), sizeof(backlight_config) );
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}
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void backlight_config_save(void)
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{
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eeprom_update_block( &g_config, ((void*)MONO_BACKLIGHT_CONFIG_EEPROM_ADDR), sizeof(backlight_config) );
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}
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void backlight_update_pwm_buffers(void)
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{
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is31fl3736_flush();
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}
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bool process_record_backlight(uint16_t keycode, keyrecord_t *record)
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{
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// Record keypresses for backlight effects
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if ( record->event.pressed )
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{
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backlight_set_key_hit( record->event.key.row, record->event.key.col );
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}
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switch(keycode)
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{
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case BR_INC:
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if (record->event.pressed)
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{
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backlight_brightness_increase();
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}
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return false;
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break;
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case BR_DEC:
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if (record->event.pressed)
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{
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backlight_brightness_decrease();
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}
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return false;
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break;
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case EF_INC:
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if (record->event.pressed)
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{
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backlight_effect_increase();
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}
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return false;
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break;
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case EF_DEC:
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if (record->event.pressed)
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{
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backlight_effect_decrease();
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}
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return false;
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break;
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case ES_INC:
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if (record->event.pressed)
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{
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backlight_effect_speed_increase();
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}
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return false;
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break;
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case ES_DEC:
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if (record->event.pressed)
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{
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backlight_effect_speed_decrease();
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}
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return false;
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break;
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}
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return true;
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}
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// Deals with the messy details of incrementing an integer
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uint8_t increment( uint8_t value, uint8_t step, uint8_t min, uint8_t max )
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{
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int16_t new_value = value;
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new_value += step;
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return MIN( MAX( new_value, min ), max );
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}
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uint8_t decrement( uint8_t value, uint8_t step, uint8_t min, uint8_t max )
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{
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int16_t new_value = value;
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new_value -= step;
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return MIN( MAX( new_value, min ), max );
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}
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void backlight_effect_increase(void)
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{
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g_config.effect = increment( g_config.effect, 1, 0, BACKLIGHT_EFFECT_MAX );
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backlight_config_save();
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}
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void backlight_effect_decrease(void)
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{
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g_config.effect = decrement( g_config.effect, 1, 0, BACKLIGHT_EFFECT_MAX );
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backlight_config_save();
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}
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void backlight_effect_speed_increase(void)
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{
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g_config.effect_speed = increment( g_config.effect_speed, 1, 0, 3 );
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backlight_config_save();
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}
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void backlight_effect_speed_decrease(void)
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{
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g_config.effect_speed = decrement( g_config.effect_speed, 1, 0, 3 );
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backlight_config_save();
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}
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void backlight_brightness_increase(void)
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{
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g_config.brightness = increment( g_config.brightness, 8, 0, 255 );
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backlight_config_save();
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}
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void backlight_brightness_decrease(void)
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{
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g_config.brightness = decrement( g_config.brightness, 8, 0, 255 );
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backlight_config_save();
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}
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void backlight_device_indication(uint8_t value)
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{
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static uint8_t current_effect = 0;
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static uint8_t alternate_effect = 0;
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if ( value == 0 ) {
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current_effect = g_config.effect;
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alternate_effect = g_config.effect > 0 ? 0 : 1;
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}
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g_config.effect = value % 2 == 0 ? alternate_effect : current_effect;
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}
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