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- #include <stdint.h>
- #include <avr/io.h>
- #include <avr/interrupt.h>
- #include <avr/pgmspace.h>
- #include "led.h"
- #include "sleep_led.h"
- #define SLEEP_LED_TIMER_TOP F_CPU / (256 * 64)
- void sleep_led_init(void) {
-
-
- TCCR1B |= _BV(WGM12);
-
- TCCR1B |= _BV(CS10);
-
- uint8_t sreg = SREG;
- cli();
- OCR1AH = (SLEEP_LED_TIMER_TOP >> 8) & 0xff;
- OCR1AL = SLEEP_LED_TIMER_TOP & 0xff;
- SREG = sreg;
- }
- void sleep_led_enable(void) {
-
- TIMSK1 |= _BV(OCIE1A);
- }
- void sleep_led_disable(void) {
-
- TIMSK1 &= ~_BV(OCIE1A);
- }
- void sleep_led_toggle(void) {
-
- TIMSK1 ^= _BV(OCIE1A);
- }
- static const uint8_t breathing_table[64] PROGMEM = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 4, 6, 10, 15, 23, 32, 44, 58, 74, 93, 113, 135, 157, 179, 199, 218, 233, 245, 252, 255, 252, 245, 233, 218, 199, 179, 157, 135, 113, 93, 74, 58, 44, 32, 23, 15, 10, 6, 4, 2, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
- ISR(TIMER1_COMPA_vect) {
-
- static union {
- uint16_t row;
- struct {
- uint8_t count : 8;
- uint8_t duration : 2;
- uint8_t index : 6;
- } pwm;
- } timer = {.row = 0};
- timer.row++;
-
- if (timer.pwm.count == 0) {
- led_set(1 << USB_LED_CAPS_LOCK);
- }
-
- if (timer.pwm.count == pgm_read_byte(&breathing_table[timer.pwm.index])) {
- led_set(0);
- }
- }
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