classb_freq.h File Reference

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Detailed Description

Settings and definitions for the CPU frequency test.

Application note:

AVR1610: Guide to IEC60730 Class B compliance with XMEGA

Documentation

For comprehensive code documentation, supported compilers, compiler settings and supported devices see readme.html

Author:

Atmel Corporation: http://www.atmel.com
Support email: avr@a.nosp@m.tmel.nosp@m..com

Copyright (C) 2012 Atmel Corporation. All rights reserved.

Definition in file classb_freq.h.

#include "avr_compiler.h"
#include "classb_rtc_common.h"
#include "error_handler.h"

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Macros
#define	F_CPU   <value>
	The system frequency.
#define	CLASSB_TC_MOD   0
	TC module selection.
#define	CLASSB_TC_PRESCALER   8
	TC prescaler.
#define	CLASSB_TOLERANCE   25UL
	Tolerance for the CPU frequency deviation.

Functions
void	classb_freq_setup_timer ()
	This sets up the TC that is used in the frequency test. This configures the period, prescaler and overflow interrupt.
void	classb_freq_callback ()
	This is called back from the RTC interrupt.