How to compare between internal eeprom and RTC ?

[bianchi77]

Guys,

I want to set starting time and stopping time with RTC,
Shall I use eeprom for it ?
How to compare between internal eeprom and RTC ?

any clues or ideas ?
thanks

 

[embpic]

u can use Interrupt from RTC for that time or u can just continous check it in while loop.and if u want to retain the compar value after power is off then u have to use EEPROM.

 

[bianchi77]

u can use Interrupt from RTC for that time or u can just continous check it in while loop.and if u want to retain the compar value after power is off then u have to use EEPROM.

I see, is it possible for me using UTC ? convert RTC to UTC save to eeprom and compare the content of EEPROM with current RTC ?
https://en.wikipedia.org/wiki/Unix_time

 

[jayanth.devarayanadurga]

If the time which you have to compare with RTC time is not changed but fixed like 16:45:26 then you can hardcode it. The value will be in a variable. If uC resets the variable will be initialized again with that value which can be compared in while(1) loop.

 

[Venkadesh_M]

for added simplicity, in starting you can read the EEPROM values and put in alarm flags or you can update them in while loop if you need it dynamically...

 

[bianchi77]

how can I save the value from RTC, for example I want to set on at 16:05:05 and off at 19:01:43 ?