meter_main.c File Reference

Meter initialisation. More...

#include "meter.h"

Go to the source code of this file.

Functions
int	main (void)

Detailed Description

Meter initialisation.

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

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Definition in file meter_main.c.

Function Documentation

int main

(

void

)

set the power reduction register to minimize current consumption

set CPU clock to 32MHz and enables the DFLL32MHz

initialize the LCD module

display all the segments in LCD

initialize the GPIO pins

initializes the UART

load the calibration data from flash

get the ADC offset value

initialize the ADC

load the calibration value from eeprom

initilize RTC to external clock and 1 sec interrupt

initilize the timer

rtc_flag is set

perform the calculation of metering paramters

if power on detected

change the clock frequency to 32MHz

switch off the battery

initialize gpio pins

change the sleep mode to ideal sleep

enable ADC & Timer

initialize lcd module

update power status flag

update the LCD display

check for calibration flag and proceed and call the appropriate calibration funtion

checking the calibration flag for calibrating the date & time

checking the calibration flag for calibrating the voltage

checking the calibration flag for calculating the offset value

checking the calibration flag for calculating the phase angle variation

checking the calibration flag for calculating watt varition

checking the calibration flag for calibrating the current

checking the power_status, if power off is detected

switch on the battery

change the sleep mode to power save mode

switch off the LCD

change reset the gpio pin

disable the ADC

disable the timer

clear all the varilable used in for energy calculation

reduce the cpu clock frequency to minimize power consumption

update power status flag

goes to sleep

Definition at line 51 of file meter_main.c.