Current Time from PC

MarkchchPIC · Posted: Mon May 25, 2015 5:09 pm

Hi All, Is there a way to use the __TIME__ function of the compiler to extract the current time and use the data to set up say a DS1307?

PCM programmer · Joined: 06 Sep 2003 Posts: 21708

It only works at compile time. It doesn't work at runtime. And indeed at
runtime, you would need some connection between the PIC and a PC to
get the time by any method.

MarkchchPIC · Posted: Mon May 25, 2015 8:19 pm

Thanks PCM,

So if I have a serial connection to the PC I could setup and send a string in the format hhmmss then read at the PIC and update the DS1307?

newguy · Joined: 24 Jun 2004 Posts: 1909

Of course, but the compiler won't do that for you. You have to write a PC program to send the current time as a string when prompted or maybe once per minute. Or maybe you can find a freeware program that does that.

Either way, that's only half the battle. You'd also need to add PIC code to a) catch the string, b) parse/interpret the string, and c) properly write present time to the DS1307.