clock.c

ADS1.2 samples

/*
** Copyright (C) ARM Limited, 2002. All rights reserved.
*/

/* clock.c */

/*
** This implements a simple clocking mechanism on the Integrator platform
**
** It reads from the Real Time Clock that is present on the
** Integrator AP Motherboard.
**
** The reference counter ticks at 1Hz.
** this is very poor resolution, but is very simple to implement.
*/

/* 
** Define SCATTER_PERIP if the Core module clock register locations are
** defined in a scatter file
*/

#ifdef SCATTER_PERIP

#include "intgrt_struct.h"
extern struct cm cm0;
extern struct rtc rtc0;
#define CM_REFCT  cm0.refct
#define RTC_DR rtc0.DR

#else
#include "intgrt.h"
#endif


/* Return the current value from the integrator reference clock */

unsigned ref_clock(void)
{
  return RTC_DR;
}

void init_clock(void)
{
	RTC_DR=0;			//Zero the Real Time Clock
}