Android alarm driver

Question

I am new to android, I want to know the implementation of alarm.c particularly why android alarm needs the RTC support. Alarm works for me only when i enable RTC support. can you please explain in brief way whats the importance of RTC in alarm

Thanks Regards Shabbir

Answer 1

Improtance of RTC.

It is REAL TIME CLOCK . you are working on application layer .Its not important for you how its work.

Real-Time Clock (RTC) Counts Seconds, Minutes, Hours, Date of the Month, Month, Day of the Week, and Year with Leap-Year
That you call it by programing.

it is IC (hardware part). if you want to know more about it please go through link;

RTC IC DataSHEET