117 lines
2.6 KiB
C
117 lines
2.6 KiB
C
/* Copyright 2018 Jason Williams (Wilba)
|
|
*
|
|
* 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 "wt_mono_backlight.h"
|
|
#include "drivers/avr/i2c_master.h"
|
|
#include "drivers/issi/is31fl3736.h"
|
|
|
|
#include <avr/interrupt.h>
|
|
|
|
#define ISSI_ADDR_DEFAULT 0x50
|
|
|
|
bool g_suspend_state = false;
|
|
|
|
// Global tick at 20 Hz
|
|
uint32_t g_tick = 0;
|
|
uint8_t g_config_effect_speed = 0;
|
|
uint8_t g_config_brightness = 255;
|
|
|
|
void backlight_init_drivers(void)
|
|
{
|
|
// Initialize I2C
|
|
i2c_init();
|
|
IS31FL3736_init( ISSI_ADDR_DEFAULT );
|
|
|
|
for ( uint8_t index = 0; index < 96; index++ ) {
|
|
IS31FL3736_mono_set_led_control_register( index, true );
|
|
}
|
|
IS31FL3736_update_led_control_registers( ISSI_ADDR_DEFAULT, 0x00 );
|
|
}
|
|
|
|
|
|
// This is (F_CPU/1024) / 20 Hz
|
|
// = 15625 Hz / 20 Hz
|
|
// = 781
|
|
#define TIMER3_TOP 781
|
|
|
|
void backlight_timer_init(void)
|
|
{
|
|
static uint8_t backlight_timer_is_init = 0;
|
|
if ( backlight_timer_is_init ) {
|
|
return;
|
|
}
|
|
backlight_timer_is_init = 1;
|
|
|
|
// Timer 3 setup
|
|
TCCR3B = _BV(WGM32) | // CTC mode OCR3A as TOP
|
|
_BV(CS32) | _BV(CS30); // prescale by /1024
|
|
// Set TOP value
|
|
uint8_t sreg = SREG;
|
|
cli();
|
|
|
|
OCR3AH = (TIMER3_TOP >> 8) & 0xff;
|
|
OCR3AL = TIMER3_TOP & 0xff;
|
|
SREG = sreg;
|
|
}
|
|
|
|
void backlight_timer_enable(void)
|
|
{
|
|
TIMSK3 |= _BV(OCIE3A);
|
|
}
|
|
|
|
void backlight_timer_disable(void)
|
|
{
|
|
TIMSK3 &= ~_BV(OCIE3A);
|
|
}
|
|
|
|
void backlight_set_suspend_state(bool state)
|
|
{
|
|
g_suspend_state = state;
|
|
}
|
|
|
|
void backlight_effect_cycle_all(void)
|
|
{
|
|
uint8_t offset = ( g_tick << g_config_effect_speed ) & 0xFF;
|
|
|
|
backlight_set_brightness_all( offset );
|
|
}
|
|
|
|
ISR(TIMER3_COMPA_vect)
|
|
{
|
|
// delay 1 second before driving LEDs or doing anything else
|
|
static uint8_t startup_tick = 0;
|
|
if ( startup_tick < 20 ) {
|
|
startup_tick++;
|
|
return;
|
|
}
|
|
|
|
g_tick++;
|
|
|
|
//backlight_effect_cycle_all();
|
|
backlight_set_brightness_all( 255 );
|
|
}
|
|
|
|
void backlight_update_pwm_buffers(void)
|
|
{
|
|
IS31FL3736_update_pwm_buffers(ISSI_ADDR_DEFAULT,0x00);
|
|
}
|
|
|
|
void backlight_set_brightness_all( uint8_t value )
|
|
{
|
|
IS31FL3736_mono_set_brightness_all( value );
|
|
}
|
|
|