classb_freq.h File Reference

Settings and definitions for the CPU frequency test.

Application note:

AVR1610: Guide to IEC60730 Class B compliance with XMEGA

Copyright (c) 2011-2018 Microchip Technology Inc. and its subsidiaries.

#include <asf.h>
#include "classb_rtc_common.h"
#include "error_handler.h"

Macros
#define	CLASSB_TC_COUNT_REF
	TC count reference. More...
#define	CLASSB_TC_FREQ   (uint32_t)(F_CPU / CLASSB_TC_PRESCALER)
	TC frequency. More...
#define	CLASSB_TC_MAX_DIFF
	Maximum absolute difference between reference and estimated frequency. More...
#define	CLASSB_TC_MAX_OVF_COUNT
	TC maximum number of overflows. More...
#define	CLASSB_TC_MOD   D1
	TC module selection. More...
#define	CLASSB_TC_PER   0xFFFF
	TC period. More...
#define	CLASSB_TC_PRESCALER   64
	TC prescaler. More...
#define	CLASSB_TC_PRESCALER_gc   LABEL(TC_CLKSEL_DIV, CLASSB_TC_PRESCALER, _gc)
	Label for the TC prescaler group configuration. More...
#define	CLASSB_TC_TOLERANCE   25UL
	Tolerance for the CPU frequency deviation. More...
#define	CLASSB_TEST_TC   LABEL(TC, CLASSB_TC_MOD,)
	Label for the TC module. More...
#define	CLASSB_TEST_TC_OVF_vect   LABEL(TC, CLASSB_TC_MOD, _OVF_vect)
	Label for the overflow interrupt vector for the chosen TC. More...
#define	F_CPU   <value>
	The system frequency. More...
Internal string manipulation macros
#define	STRINGIZE_AUX(X)   #X
#define	STRINGIZE(X)   STRINGIZE_AUX(X)
#define	CONCAT3(X, Y, Z)   X##Y##Z
#define	LABEL(X, Y, Z)   CONCAT3(X,Y,Z)

Functions
void	classb_freq_callback (void)
	Callback function for the RTC interrupt. More...
void	classb_freq_setup_timer (void)
	Set up the TC for use in the frequency test. More...
void	classb_freq_tc_callback (void)
	TC overflow interrupt. More...

#define CONCAT3	(		X,
			Y,
			Z
	)		X##Y##Z

#define LABEL	(		X,
			Y,
			Z
	)		CONCAT3(X,Y,Z)

#define STRINGIZE

(

X

)

STRINGIZE_AUX(X)

#define STRINGIZE_AUX

(

X

)

#X