Quote Originally Posted by Melanie View Post
Hardware Assisted Route: The DS1307 has a pin which can give you a pulse every Second. Several pins on PortB have the facility to set a FLAG in a Register when the state of the pin changes. Simply check the Flag at the end of a scan and do a DS1307 READ when the Flag pops up.
I like this! I have not used the DS1307 yet, and usually I would increment a counter like your other suggestion, but I will keep this in mind in the future. Thanks, Melanie.