Atmel Xplained Evaluation Board ATXMEGAA3BU-XPLD ATXMEGAA3BU-XPLD Data Sheet

 

8413A-AVR-09/11 

“Set date” and “set time” presents the 
user with the current date or time and 
spinner widgets to adjust them. The 
date widget does not do real-time 

checking of valid dates, so if the user 
tries to set an invalid date such as Feb. 
31

th

; an error message will be 

presented, and the date will not be stored. 

The “Set timezone” menu option is the same application that is presented to the user 
on initial startup, and will present the user with a list of time zones from UTC -12 to 
+12 hours and UTC +0, +15, +30 or +45 minutes. The selector uses the menu system 
and a list of strings to present the user with the available options. The selected time 
zone is stored in EEPROM. 

The date and time menu, along with the associated applications are located in 

date_time.c

 and 

date_time.h

. The time zone selector is located in 

timezone.c

 and 

timezone.h

. 

It is important to note that this application does not account for Daylight Saving Time 
(DST). 

The production date application uses 
the current time from the RTC and the 
production time stored in user signature 
row to calculate and show on the LCD 

display how much time in months, days 
and hours has elapsed since production. 
If production time in the signature row is 
corrupted, it will be assumed to be 01.01.1970, 00:00:00. The production date 
application is available from the main menu. It is located in 

production_date.c

 and 

production_date.h

. 

The temperature application acquires 
the temperature using the functions 
available from 

adc_sensors.c

 and 

adc_sensors.h

, and then displays this 

data on the screen, together with a 
thermometer picture which has a scale 
depending on the measured data. The temperature application is available from the 
main menu. It is located in the files 

ntc_sensor.c

 and 

ntc_sensor.h

.