426 lines
15 KiB
C
426 lines
15 KiB
C
|
#include "quantum.h"
|
||
|
|
#include "backlight.h"
|
||
|
|
#include "backlight_driver_common.h"
|
||
|
|
#include "debug.h"
|
||
|
|
|
||
|
|
// This logic is a bit complex, we support 3 setups:
|
||
|
|
//
|
||
|
|
// 1. Hardware PWM when backlight is wired to a PWM pin.
|
||
|
|
// Depending on this pin, we use a different output compare unit.
|
||
|
|
// 2. Software PWM with hardware timers, but the used timer
|
||
|
|
// depends on the Audio setup (Audio wins over Backlight).
|
||
|
|
// 3. Full software PWM, driven by the matrix scan, if both timers are used by Audio.
|
||
|
|
|
||
|
|
#if (defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__) || defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__)) && (BACKLIGHT_PIN == B5 || BACKLIGHT_PIN == B6 || BACKLIGHT_PIN == B7)
|
||
|
|
# define HARDWARE_PWM
|
||
|
|
# define ICRx ICR1
|
||
|
|
# define TCCRxA TCCR1A
|
||
|
|
# define TCCRxB TCCR1B
|
||
|
|
# define TIMERx_OVF_vect TIMER1_OVF_vect
|
||
|
|
# define TIMSKx TIMSK1
|
||
|
|
# define TOIEx TOIE1
|
||
|
|
|
||
|
|
# if BACKLIGHT_PIN == B5
|
||
|
|
# define COMxx0 COM1A0
|
||
|
|
# define COMxx1 COM1A1
|
||
|
|
# define OCRxx OCR1A
|
||
|
|
# elif BACKLIGHT_PIN == B6
|
||
|
|
# define COMxx0 COM1B0
|
||
|
|
# define COMxx1 COM1B1
|
||
|
|
# define OCRxx OCR1B
|
||
|
|
# elif BACKLIGHT_PIN == B7
|
||
|
|
# define COMxx0 COM1C0
|
||
|
|
# define COMxx1 COM1C1
|
||
|
|
# define OCRxx OCR1C
|
||
|
|
# endif
|
||
|
|
#elif (defined(__AVR_AT90USB646__) || defined(__AVR_AT90USB647__) || defined(__AVR_AT90USB1286__) || defined(__AVR_AT90USB1287__) || defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__)) && (BACKLIGHT_PIN == C4 || BACKLIGHT_PIN == C5 || BACKLIGHT_PIN == C6)
|
||
|
|
# define HARDWARE_PWM
|
||
|
|
# define ICRx ICR3
|
||
|
|
# define TCCRxA TCCR3A
|
||
|
|
# define TCCRxB TCCR3B
|
||
|
|
# define TIMERx_OVF_vect TIMER3_OVF_vect
|
||
|
|
# define TIMSKx TIMSK3
|
||
|
|
# define TOIEx TOIE3
|
||
|
|
|
||
|
|
# if BACKLIGHT_PIN == C4
|
||
|
|
# if (defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__))
|
||
|
|
# error This MCU has no C4 pin!
|
||
|
|
# else
|
||
|
|
# define COMxx0 COM3C0
|
||
|
|
# define COMxx1 COM3C1
|
||
|
|
# define OCRxx OCR3C
|
||
|
|
# endif
|
||
|
|
# elif BACKLIGHT_PIN == C5
|
||
|
|
# if (defined(__AVR_ATmega16U4__) || defined(__AVR_ATmega32U4__))
|
||
|
|
# error This MCU has no C5 pin!
|
||
|
|
# else
|
||
|
|
# define COMxx0 COM3B0
|
||
|
|
# define COMxx1 COM3B1
|
||
|
|
# define OCRxx OCR3B
|
||
|
|
# endif
|
||
|
|
# elif BACKLIGHT_PIN == C6
|
||
|
|
# define COMxx0 COM3A0
|
||
|
|
# define COMxx1 COM3A1
|
||
|
|
# define OCRxx OCR3A
|
||
|
|
# endif
|
||
|
|
#elif (defined(__AVR_ATmega16U2__) || defined(__AVR_ATmega32U2__)) && (BACKLIGHT_PIN == B7 || BACKLIGHT_PIN == C5 || BACKLIGHT_PIN == C6)
|
||
|
|
# define HARDWARE_PWM
|
||
|
|
# define ICRx ICR1
|
||
|
|
# define TCCRxA TCCR1A
|
||
|
|
# define TCCRxB TCCR1B
|
||
|
|
# define TIMERx_OVF_vect TIMER1_OVF_vect
|
||
|
|
# define TIMSKx TIMSK1
|
||
|
|
# define TOIEx TOIE1
|
||
|
|
|
||
|
|
# if BACKLIGHT_PIN == B7
|
||
|
|
# define COMxx0 COM1C0
|
||
|
|
# define COMxx1 COM1C1
|
||
|
|
# define OCRxx OCR1C
|
||
|
|
# elif BACKLIGHT_PIN == C5
|
||
|
|
# define COMxx0 COM1B0
|
||
|
|
# define COMxx1 COM1B1
|
||
|
|
# define OCRxx OCR1B
|
||
|
|
# elif BACKLIGHT_PIN == C6
|
||
|
|
# define COMxx0 COM1A0
|
||
|
|
# define COMxx1 COM1A1
|
||
|
|
# define OCRxx OCR1A
|
||
|
|
# endif
|
||
|
|
#elif defined(__AVR_ATmega32A__) && (BACKLIGHT_PIN == D4 || BACKLIGHT_PIN == D5)
|
||
|
|
# define HARDWARE_PWM
|
||
|
|
# define ICRx ICR1
|
||
|
|
# define TCCRxA TCCR1A
|
||
|
|
# define TCCRxB TCCR1B
|
||
|
|
# define TIMERx_OVF_vect TIMER1_OVF_vect
|
||
|
|
# define TIMSKx TIMSK
|
||
|
|
# define TOIEx TOIE1
|
||
|
|
|
||
|
|
# if BACKLIGHT_PIN == D4
|
||
|
|
# define COMxx0 COM1B0
|
||
|
|
# define COMxx1 COM1B1
|
||
|
|
# define OCRxx OCR1B
|
||
|
|
# elif BACKLIGHT_PIN == D5
|
||
|
|
# define COMxx0 COM1A0
|
||
|
|
# define COMxx1 COM1A1
|
||
|
|
# define OCRxx OCR1A
|
||
|
|
# endif
|
||
|
|
#elif (defined(__AVR_ATmega328P__) || defined(__AVR_ATmega328__)) && (BACKLIGHT_PIN == B1 || BACKLIGHT_PIN == B2)
|
||
|
|
# define HARDWARE_PWM
|
||
|
|
# define ICRx ICR1
|
||
|
|
# define TCCRxA TCCR1A
|
||
|
|
# define TCCRxB TCCR1B
|
||
|
|
# define TIMERx_OVF_vect TIMER1_OVF_vect
|
||
|
|
# define TIMSKx TIMSK1
|
||
|
|
# define TOIEx TOIE1
|
||
|
|
|
||
|
|
# if BACKLIGHT_PIN == B1
|
||
|
|
# define COMxx0 COM1A0
|
||
|
|
# define COMxx1 COM1A1
|
||
|
|
# define OCRxx OCR1A
|
||
|
|
# elif BACKLIGHT_PIN == B2
|
||
|
|
# define COMxx0 COM1B0
|
||
|
|
# define COMxx1 COM1B1
|
||
|
|
# define OCRxx OCR1B
|
||
|
|
# endif
|
||
|
|
#elif !defined(B5_AUDIO) && !defined(B6_AUDIO) && !defined(B7_AUDIO)
|
||
|
|
// Timer 1 is not in use by Audio feature, Backlight can use it
|
||
|
|
# pragma message "Using hardware timer 1 with software PWM"
|
||
|
|
# define HARDWARE_PWM
|
||
|
|
# define BACKLIGHT_PWM_TIMER
|
||
|
|
# define ICRx ICR1
|
||
|
|
# define TCCRxA TCCR1A
|
||
|
|
# define TCCRxB TCCR1B
|
||
|
|
# define TIMERx_COMPA_vect TIMER1_COMPA_vect
|
||
|
|
# define TIMERx_OVF_vect TIMER1_OVF_vect
|
||
|
|
# if defined(__AVR_ATmega32A__) // This MCU has only one TIMSK register
|
||
|
|
# define TIMSKx TIMSK
|
||
|
|
# else
|
||
|
|
# define TIMSKx TIMSK1
|
||
|
|
# endif
|
||
|
|
# define TOIEx TOIE1
|
||
|
|
|
||
|
|
# define OCIExA OCIE1A
|
||
|
|
# define OCRxx OCR1A
|
||
|
|
#elif !defined(C6_AUDIO) && !defined(C5_AUDIO) && !defined(C4_AUDIO)
|
||
|
|
# pragma message "Using hardware timer 3 with software PWM"
|
||
|
|
// Timer 3 is not in use by Audio feature, Backlight can use it
|
||
|
|
# define HARDWARE_PWM
|
||
|
|
# define BACKLIGHT_PWM_TIMER
|
||
|
|
# define ICRx ICR1
|
||
|
|
# define TCCRxA TCCR3A
|
||
|
|
# define TCCRxB TCCR3B
|
||
|
|
# define TIMERx_COMPA_vect TIMER3_COMPA_vect
|
||
|
|
# define TIMERx_OVF_vect TIMER3_OVF_vect
|
||
|
|
# define TIMSKx TIMSK3
|
||
|
|
# define TOIEx TOIE3
|
||
|
|
|
||
|
|
# define OCIExA OCIE3A
|
||
|
|
# define OCRxx OCR3A
|
||
|
|
#elif defined(BACKLIGHT_CUSTOM_DRIVER)
|
||
|
|
error("Please set 'BACKLIGHT_DRIVER = custom' within rules.mk")
|
||
|
|
#else
|
||
|
|
error("Please set 'BACKLIGHT_DRIVER = software' within rules.mk")
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifndef BACKLIGHT_PWM_TIMER // pwm through software
|
||
|
|
|
||
|
|
static inline void enable_pwm(void) {
|
||
|
|
# if BACKLIGHT_ON_STATE == 1
|
||
|
|
TCCRxA |= _BV(COMxx1);
|
||
|
|
# else
|
||
|
|
TCCRxA |= _BV(COMxx1) | _BV(COMxx0);
|
||
|
|
# endif
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void disable_pwm(void) {
|
||
|
|
# if BACKLIGHT_ON_STATE == 1
|
||
|
|
TCCRxA &= ~(_BV(COMxx1));
|
||
|
|
# else
|
||
|
|
TCCRxA &= ~(_BV(COMxx1) | _BV(COMxx0));
|
||
|
|
# endif
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#ifdef BACKLIGHT_PWM_TIMER
|
||
|
|
|
||
|
|
// The idea of software PWM assisted by hardware timers is the following
|
||
|
|
// we use the hardware timer in fast PWM mode like for hardware PWM, but
|
||
|
|
// instead of letting the Output Match Comparator control the led pin
|
||
|
|
// (which is not possible since the backlight is not wired to PWM pins on the
|
||
|
|
// CPU), we do the LED on/off by oursleves.
|
||
|
|
// The timer is setup to count up to 0xFFFF, and we set the Output Compare
|
||
|
|
// register to the current 16bits backlight level (after CIE correction).
|
||
|
|
// This means the CPU will trigger a compare match interrupt when the counter
|
||
|
|
// reaches the backlight level, where we turn off the LEDs,
|
||
|
|
// but also an overflow interrupt when the counter rolls back to 0,
|
||
|
|
// in which we're going to turn on the LEDs.
|
||
|
|
// The LED will then be on for OCRxx/0xFFFF time, adjusted every 244Hz.
|
||
|
|
|
||
|
|
// Triggered when the counter reaches the OCRx value
|
||
|
|
ISR(TIMERx_COMPA_vect) { backlight_pins_off(); }
|
||
|
|
|
||
|
|
// Triggered when the counter reaches the TOP value
|
||
|
|
// this one triggers at F_CPU/65536 =~ 244 Hz
|
||
|
|
ISR(TIMERx_OVF_vect) {
|
||
|
|
# ifdef BACKLIGHT_BREATHING
|
||
|
|
if (is_breathing()) {
|
||
|
|
breathing_task();
|
||
|
|
}
|
||
|
|
# endif
|
||
|
|
// for very small values of OCRxx (or backlight level)
|
||
|
|
// we can't guarantee this whole code won't execute
|
||
|
|
// at the same time as the compare match interrupt
|
||
|
|
// which means that we might turn on the leds while
|
||
|
|
// trying to turn them off, leading to flickering
|
||
|
|
// artifacts (especially while breathing, because breathing_task
|
||
|
|
// takes many computation cycles).
|
||
|
|
// so better not turn them on while the counter TOP is very low.
|
||
|
|
if (OCRxx > 256) {
|
||
|
|
backlight_pins_on();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
#define TIMER_TOP 0xFFFFU
|
||
|
|
|
||
|
|
// See http://jared.geek.nz/2013/feb/linear-led-pwm
|
||
|
|
static uint16_t cie_lightness(uint16_t v) {
|
||
|
|
if (v <= 5243) // if below 8% of max
|
||
|
|
return v / 9; // same as dividing by 900%
|
||
|
|
else {
|
||
|
|
uint32_t y = (((uint32_t)v + 10486) << 8) / (10486 + 0xFFFFUL); // add 16% of max and compare
|
||
|
|
// to get a useful result with integer division, we shift left in the expression above
|
||
|
|
// and revert what we've done again after squaring.
|
||
|
|
y = y * y * y >> 8;
|
||
|
|
if (y > 0xFFFFUL) // prevent overflow
|
||
|
|
return 0xFFFFU;
|
||
|
|
else
|
||
|
|
return (uint16_t)y;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// range for val is [0..TIMER_TOP]. PWM pin is high while the timer count is below val.
|
||
|
|
static inline void set_pwm(uint16_t val) { OCRxx = val; }
|
||
|
|
|
||
|
|
void backlight_set(uint8_t level) {
|
||
|
|
if (level > BACKLIGHT_LEVELS) level = BACKLIGHT_LEVELS;
|
||
|
|
|
||
|
|
if (level == 0) {
|
||
|
|
#ifdef BACKLIGHT_PWM_TIMER
|
||
|
|
if (OCRxx) {
|
||
|
|
TIMSKx &= ~(_BV(OCIExA));
|
||
|
|
TIMSKx &= ~(_BV(TOIEx));
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
// Turn off PWM control on backlight pin
|
||
|
|
disable_pwm();
|
||
|
|
#endif
|
||
|
|
backlight_pins_off();
|
||
|
|
} else {
|
||
|
|
#ifdef BACKLIGHT_PWM_TIMER
|
||
|
|
if (!OCRxx) {
|
||
|
|
TIMSKx |= _BV(OCIExA);
|
||
|
|
TIMSKx |= _BV(TOIEx);
|
||
|
|
}
|
||
|
|
#else
|
||
|
|
// Turn on PWM control of backlight pin
|
||
|
|
enable_pwm();
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
// Set the brightness
|
||
|
|
set_pwm(cie_lightness(TIMER_TOP * (uint32_t)level / BACKLIGHT_LEVELS));
|
||
|
|
}
|
||
|
|
|
||
|
|
void backlight_task(void) {}
|
||
|
|
|
||
|
|
#ifdef BACKLIGHT_BREATHING
|
||
|
|
|
||
|
|
# define BREATHING_NO_HALT 0
|
||
|
|
# define BREATHING_HALT_OFF 1
|
||
|
|
# define BREATHING_HALT_ON 2
|
||
|
|
# define BREATHING_STEPS 128
|
||
|
|
|
||
|
|
static uint8_t breathing_halt = BREATHING_NO_HALT;
|
||
|
|
static uint16_t breathing_counter = 0;
|
||
|
|
|
||
|
|
# ifdef BACKLIGHT_PWM_TIMER
|
||
|
|
static bool breathing = false;
|
||
|
|
|
||
|
|
bool is_breathing(void) { return breathing; }
|
||
|
|
|
||
|
|
# define breathing_interrupt_enable() \
|
||
|
|
do { \
|
||
|
|
breathing = true; \
|
||
|
|
} while (0)
|
||
|
|
# define breathing_interrupt_disable() \
|
||
|
|
do { \
|
||
|
|
breathing = false; \
|
||
|
|
} while (0)
|
||
|
|
# else
|
||
|
|
|
||
|
|
bool is_breathing(void) { return !!(TIMSKx & _BV(TOIEx)); }
|
||
|
|
|
||
|
|
# define breathing_interrupt_enable() \
|
||
|
|
do { \
|
||
|
|
TIMSKx |= _BV(TOIEx); \
|
||
|
|
} while (0)
|
||
|
|
# define breathing_interrupt_disable() \
|
||
|
|
do { \
|
||
|
|
TIMSKx &= ~_BV(TOIEx); \
|
||
|
|
} while (0)
|
||
|
|
# endif
|
||
|
|
|
||
|
|
# define breathing_min() \
|
||
|
|
do { \
|
||
|
|
breathing_counter = 0; \
|
||
|
|
} while (0)
|
||
|
|
# define breathing_max() \
|
||
|
|
do { \
|
||
|
|
breathing_counter = get_breathing_period() * 244 / 2; \
|
||
|
|
} while (0)
|
||
|
|
|
||
|
|
void breathing_enable(void) {
|
||
|
|
breathing_counter = 0;
|
||
|
|
breathing_halt = BREATHING_NO_HALT;
|
||
|
|
breathing_interrupt_enable();
|
||
|
|
}
|
||
|
|
|
||
|
|
void breathing_pulse(void) {
|
||
|
|
if (get_backlight_level() == 0)
|
||
|
|
breathing_min();
|
||
|
|
else
|
||
|
|
breathing_max();
|
||
|
|
breathing_halt = BREATHING_HALT_ON;
|
||
|
|
breathing_interrupt_enable();
|
||
|
|
}
|
||
|
|
|
||
|
|
void breathing_disable(void) {
|
||
|
|
breathing_interrupt_disable();
|
||
|
|
// Restore backlight level
|
||
|
|
backlight_set(get_backlight_level());
|
||
|
|
}
|
||
|
|
|
||
|
|
void breathing_self_disable(void) {
|
||
|
|
if (get_backlight_level() == 0)
|
||
|
|
breathing_halt = BREATHING_HALT_OFF;
|
||
|
|
else
|
||
|
|
breathing_halt = BREATHING_HALT_ON;
|
||
|
|
}
|
||
|
|
|
||
|
|
/* To generate breathing curve in python:
|
||
|
|
* from math import sin, pi; [int(sin(x/128.0*pi)**4*255) for x in range(128)]
|
||
|
|
*/
|
||
|
|
static const uint8_t breathing_table[BREATHING_STEPS] PROGMEM = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 2, 3, 4, 5, 6, 8, 10, 12, 15, 17, 20, 24, 28, 32, 36, 41, 46, 51, 57, 63, 70, 76, 83, 91, 98, 106, 113, 121, 129, 138, 146, 154, 162, 170, 178, 185, 193, 200, 207, 213, 220, 225, 231, 235, 240, 244, 247, 250, 252, 253, 254, 255, 254, 253, 252, 250, 247, 244, 240, 235, 231, 225, 220, 213, 207, 200, 193, 185, 178, 170, 162, 154, 146, 138, 129, 121, 113, 106, 98, 91, 83, 76, 70, 63, 57, 51, 46, 41, 36, 32, 28, 24, 20, 17, 15, 12, 10, 8, 6, 5, 4, 3, 2, 1, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
|
||
|
|
|
||
|
|
// Use this before the cie_lightness function.
|
||
|
|
static inline uint16_t scale_backlight(uint16_t v) { return v / BACKLIGHT_LEVELS * get_backlight_level(); }
|
||
|
|
|
||
|
|
# ifdef BACKLIGHT_PWM_TIMER
|
||
|
|
void breathing_task(void)
|
||
|
|
# else
|
||
|
|
/* Assuming a 16MHz CPU clock and a timer that resets at 64k (ICR1), the following interrupt handler will run
|
||
|
|
* about 244 times per second.
|
||
|
|
*/
|
||
|
|
ISR(TIMERx_OVF_vect)
|
||
|
|
# endif
|
||
|
|
{
|
||
|
|
uint8_t breathing_period = get_breathing_period();
|
||
|
|
uint16_t interval = (uint16_t)breathing_period * 244 / BREATHING_STEPS;
|
||
|
|
// resetting after one period to prevent ugly reset at overflow.
|
||
|
|
breathing_counter = (breathing_counter + 1) % (breathing_period * 244);
|
||
|
|
uint8_t index = breathing_counter / interval % BREATHING_STEPS;
|
||
|
|
|
||
|
|
if (((breathing_halt == BREATHING_HALT_ON) && (index == BREATHING_STEPS / 2)) || ((breathing_halt == BREATHING_HALT_OFF) && (index == BREATHING_STEPS - 1))) {
|
||
|
|
breathing_interrupt_disable();
|
||
|
|
}
|
||
|
|
|
||
|
|
set_pwm(cie_lightness(scale_backlight((uint16_t)pgm_read_byte(&breathing_table[index]) * 0x0101U)));
|
||
|
|
}
|
||
|
|
|
||
|
|
#endif // BACKLIGHT_BREATHING
|
||
|
|
|
||
|
|
void backlight_init_ports(void) {
|
||
|
|
// Setup backlight pin as output and output to on state.
|
||
|
|
backlight_pins_init();
|
||
|
|
|
||
|
|
// I could write a wall of text here to explain... but TL;DW
|
||
|
|
// Go read the ATmega32u4 datasheet.
|
||
|
|
// And this: http://blog.saikoled.com/post/43165849837/secret-konami-cheat-code-to-high-resolution-pwm-on
|
||
|
|
|
||
|
|
#ifdef BACKLIGHT_PWM_TIMER
|
||
|
|
// TimerX setup, Fast PWM mode count to TOP set in ICRx
|
||
|
|
TCCRxA = _BV(WGM11); // = 0b00000010;
|
||
|
|
// clock select clk/1
|
||
|
|
TCCRxB = _BV(WGM13) | _BV(WGM12) | _BV(CS10); // = 0b00011001;
|
||
|
|
#else // hardware PWM
|
||
|
|
// Pin PB7 = OCR1C (Timer 1, Channel C)
|
||
|
|
// Compare Output Mode = Clear on compare match, Channel C = COM1C1=1 COM1C0=0
|
||
|
|
// (i.e. start high, go low when counter matches.)
|
||
|
|
// WGM Mode 14 (Fast PWM) = WGM13=1 WGM12=1 WGM11=1 WGM10=0
|
||
|
|
// Clock Select = clk/1 (no prescaling) = CS12=0 CS11=0 CS10=1
|
||
|
|
|
||
|
|
/*
|
||
|
|
14.8.3:
|
||
|
|
"In fast PWM mode, the compare units allow generation of PWM waveforms on the OCnx pins. Setting the COMnx1:0 bits to two will produce a non-inverted PWM [..]."
|
||
|
|
"In fast PWM mode the counter is incremented until the counter value matches either one of the fixed values 0x00FF, 0x01FF, or 0x03FF (WGMn3:0 = 5, 6, or 7), the value in ICRn (WGMn3:0 = 14), or the value in OCRnA (WGMn3:0 = 15)."
|
||
|
|
*/
|
||
|
|
# if BACKLIGHT_ON_STATE == 1
|
||
|
|
TCCRxA = _BV(COMxx1) | _BV(WGM11);
|
||
|
|
# else
|
||
|
|
TCCRxA = _BV(COMxx1) | _BV(COMxx0) | _BV(WGM11);
|
||
|
|
# endif
|
||
|
|
|
||
|
|
TCCRxB = _BV(WGM13) | _BV(WGM12) | _BV(CS10);
|
||
|
|
#endif
|
||
|
|
// Use full 16-bit resolution. Counter counts to ICR1 before reset to 0.
|
||
|
|
ICRx = TIMER_TOP;
|
||
|
|
|
||
|
|
backlight_init();
|
||
|
|
#ifdef BACKLIGHT_BREATHING
|
||
|
|
if (is_backlight_breathing()) {
|
||
|
|
breathing_enable();
|
||
|
|
}
|
||
|
|
#endif
|
||
|
|
}
|