Question about frustrating memory overrun

[lucgallant]

Hi there,

I'm working on the Uno and I have a sketch that's about 26k in size. Recently I started having issues where my Serial.println statements just weren't coming out. Also, sometimes nothing would print to me LCD. This was extremely frustrating.

So, I googled extensively and found the F() function. It's described here somewhat: http://www.baldengineer.com/blog/2013/1 ... o-f-macro/

What I want to know is, is there a way of the IDE or some internal variables letting you know that your RAM is at capacity?

I guess my issue is that I had so much text getting complied into RAM. I put F() around all the text inside both the Serial.println and lcd.print, and it runs great now. I have further optimization to do, but I spent a lot of time dealing with this issue.

I guess if someone could direct me to a resource where I could learn more about this, and maybe prevent someone else from having this frustrating issue. It's difficult to debug with no println and no real debugger... Thanks guys.

[adafruit_support_mike]

This tutorial has information about monitoring memory usage:

https://learn.adafruit.com/memories-of- ... ree-memory

[lucgallant]

Lol, perfect, this describes my situation well.

https://learn.adafruit.com/memories-of- ... ot-dot-dot

"My program worked fine until..."

This is what I needed, thanks.