Low memory tips?

tlrobinson · **Joined:** Fri Feb 18, 2011 3:41 pm **Posts:** 6

There doesn't seem to be much memory available to our programs. I can't declare a static variables larger than about 2KB before I start getting errors like:

Code: Select all

/home/ubuntu/arm-2010q1/bin/../lib/gcc/arm-none-eabi/4.4.1/../../../../arm-none-eabi/bin/ld: build/pulse_app section `.bss' will not fit in region `ram'
/home/ubuntu/arm-2010q1/bin/../lib/gcc/arm-none-eabi/4.4.1/../../../../arm-none-eabi/bin/ld: region `ram' overflowed by 317 bytes

Is there any way to tweak the memory to free up a bit more of the 8KB for static variables?

Thanks.

Jon · **Joined:** Tue Feb 15, 2011 1:00 am **Posts:** 60

RAM usage is determined by which OS calls are made to some degree. For example, if you pull in the text rendering stuff, that will take some RAM.

Much of the ram is being used by the bluetooth stack and OS. Though we haven't tweaked it significantly to reduce the memory footprint. 2kB should be enough for everyone! =D

What are you trying to do that requires > 2kB of RAM or are you just trying to find the limits?

tlrobinson · **Joined:** Fri Feb 18, 2011 3:41 pm **Posts:** 6

Jon wrote:

RAM usage is determined by which OS calls are made to some degree. For example, if you pull in the text rendering stuff, that will take some RAM.

Much of the ram is being used by the bluetooth stack and OS. Though we haven't tweaked it significantly to reduce the memory footprint. 2kB should be enough for everyone! =D

What are you trying to do that requires > 2kB of RAM or are you just trying to find the limits?

I'm trying to represent a full screen Game of Life board. I think I can work around not being able to have two full board states in memory though.

Stephanie · Posted: Sat Feb 19, 2011 5:22 pm

tlrobinson wrote:

I'm trying to represent a full screen Game of Life board. I think I can work around not being able to have two full board states in memory though.

Ah that's a cool idea! I'm a big fan of GoL implementations.

tlrobinson · **Joined:** Fri Feb 18, 2011 3:41 pm **Posts:** 6

Stephanie wrote:

tlrobinson wrote:

I'm trying to represent a full screen Game of Life board. I think I can work around not being able to have two full board states in memory though.

Ah that's a cool idea! I'm a big fan of GoL implementations.

Got it working, will post code later. In the meantime here's a video: http://yfrog.com/9go4cz

Jon · **Joined:** Tue Feb 15, 2011 1:00 am **Posts:** 60

Very cool!
I like it.

Low memory tips?

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