November 2011
Intermediate to advanced
392 pages
13h 3m
English
Content preview from Arduino InternalsBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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Saving SRAM
Even more precious than the scarce program memory in the Arduino is the amount of available SRAM. Recall from Chapter 3 that the ATmega328 has a mere 2,048 bytes of SRAM. That's not megabytes or gigabytes. The ATmega2560 has 8,192 bytes of SRAM—more, but only when compared with the little one.
SRAM is mostly thought of as being used for temporary data storage, such as variables and the like. SRAM is also used for the system stack, the place where return addresses are stored during subroutine calls and interrupts. The stack is also used in interrupt handlers to preserve the contents of the registers needed by the handler itself, so that no registers are harmed in the handling of this interrupt.
Like any precious commodity, SRAM is ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.