src/hardware/clock.c File Reference

Real-time clock for counting the uptime and for providing a time base for periodic tasks. More...

#include "clock.h"
#include "yarf.h"
#include "fastio.h"
#include "scheduling/periodic.h"
#include "scheduling/periodic_notify.h"
#include "movement/advance.h"
#include "util/math.h"
#include <avr/interrupt.h>
#include <util/atomic.h>

Go to the source code of this file.

Defines
#define	TIMER_TICKS_PER_MS   (F_CPU/8/1000)
	The number of ticks the hardware timer will take in one millisecond.
Functions
static void	timer1_init (void)
	Initializes the hardware timer.
	ISR (TIMER1_COMPB_vect, ISR_NOBLOCK)
	Interrupt service routine which is executed every millisecond.
void	clock_init (void)
	Initializes the clock component.
unsigned long	clock_millis (void)
	Returns the number of milliseconds passed since the clock was initialized.
Variables
static volatile unsigned long	millis
	The number of milliseconds passed since the clock was initialized.

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Detailed Description

Real-time clock for counting the uptime and for providing a time base for periodic tasks.

Author:

Pieter Agten (pieter.agten@gmail.com)

Date:

30 okt 2011

Definition in file clock.c.

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Function Documentation

ISR	(	TIMER1_COMPB_vect	,
		ISR_NOBLOCK
	)

Interrupt service routine which is executed every millisecond.

This routine increments millis by one and notifies the periodic scheduler that a millisecond has passed.

Definition at line 98 of file clock.c.