140 lines
3.0 KiB
C
140 lines
3.0 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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#if RGB_BACKLIGHT_ENABLED
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#include "rgb_backlight.h"
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//#include "rgb_backlight_api.h"
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#include <avr/io.h>
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#include <util/delay.h>
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#include <avr/interrupt.h>
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#include "progmem.h"
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#include "quantum/color.h"
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#include "drivers/avr/i2c_master.h"
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#include "drivers/issi/is31fl3218.h"
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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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uint8_t g_config_effect_speed = 0;
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uint8_t g_config_brightness = 255;
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void backlight_update_pwm_buffers(void)
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{
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IS31FL3218_update_pwm_buffers();
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}
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void backlight_set_color( int index, uint8_t red, uint8_t green, uint8_t blue )
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{
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IS31FL3218_set_color( index, red, green, blue );
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}
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void backlight_set_color_all( uint8_t red, uint8_t green, uint8_t blue )
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{
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IS31FL3218_set_color_all( red, green, blue );
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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 260
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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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{
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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_effect_cycle_all(void)
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{
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uint8_t hueOffset = ( g_tick << g_config_effect_speed ) & 0xFF;
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uint8_t satOffset = 127;
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// Relies on hue being 8-bit and wrapping
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for ( int i=0; i<6; i++ )
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{
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HSV hsv = { .h = hueOffset, .s = satOffset, .v = g_config_brightness };
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RGB rgb = hsv_to_rgb( hsv );
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backlight_set_color( i, rgb.r, rgb.g, rgb.b );
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}
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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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{
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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_suspend_state )
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{
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backlight_set_color_all( 0, 0, 0 );
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}
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else
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{
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//HSV hsv = { .h = 240, .s = 255, .v = g_config_brightness };
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//RGB rgb = hsv_to_rgb( hsv );
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//backlight_set_color_all( rgb.r, rgb.g, rgb.b );
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backlight_effect_cycle_all();
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}
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}
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void backlight_init_drivers(void)
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{
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// Initialize I2C
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i2c_init();
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IS31FL3218_init();
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}
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#endif // RGB_BACKLIGHT_ENABLED
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