meter_rtc.c File Reference

Metering Algorithm implementation. More...

#include "meter.h"

Go to the source code of this file.

Functions
void	rtc_init ()
	ISR (RTC_OVF_vect)
void	update_time ()

Variables
uint8_t	power_status_flag = 0
	hold the status of mains power supply
const uint8_t	days_lookup [12] = {31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31}
	lookup table for number of days in a month
RTC_BCD_t	rtcTime = {0,0,0,1,1,2012}
	structure for holding the time value

Detailed Description

Metering Algorithm implementation.

Application note:

AVR1631: Energy Meter Reference Design with ATxmega32A4

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

$Revision: 1.0
$Date: 2012-07-01 10:10:10 +0530

Copyright (c) 2008, Atmel Corporation All rights reserved.

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Definition in file meter_rtc.c.

Function Documentation

ISR

(

RTC_OVF_vect

)

breif The RTC ISR occurs in every sec. The time and date is updated in this function and the rtc_flag is set

update the time and date

check the status of mains power supply

if power is on, set the rtc_flag

if power is off, clear the rtc_flag

Definition at line 77 of file meter_rtc.c.

void rtc_init

(

)

brief This function initilize RTC to external clock and 1 sec interrupt.

Definition at line 63 of file meter_rtc.c.

void update_time

(

)

breif This function updates the date and time

Definition at line 106 of file meter_rtc.c.