vectorscope / clock.h

/** \file
 * Realtime clock tracking.
 * Uses Timer0 overflow to generate ms level clock ticks.

#ifndef _clock_h_
#define _clock_h_

#include <avr/io.h>
#include <stdint.h>

/** Track the number of miliseconds, sec, min and hour since midnight */
extern volatile uint8_t now_hour;
extern volatile uint8_t now_min;
extern volatile uint8_t now_sec;
extern volatile uint16_t now_ms;
extern volatile uint16_t now; // ms since boot


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