Re:Rust on AVR: Safer microcontrollers almost here
by Gibbon1 on Saturday February 11, 2017 @07:11AM
(#13622271)
I wrote a bunch of stuff for the AVR in c. But it's been a few years since I've done much more than a few fixes. Some of the weird issues with targeting a Harvard architecture is I think fixed.
I'd say: 'works okay'
One thing that annoyed me was calling a variadic function like printf was expensive ~100-120 bytes each call. Eight to Ten printf's --> 1k of flash gone. Far as I could tell most of it was pushing and popping stuff on the stack one byte at a time.
I ported a bunch of AVR code to an ARM Cortex[1]. Code size didn't increase much.
[1] ARM Processors are approximately half the cost of an AVR. Seriously not important if you're building 1000's of something. Important if you're building 100,000s.
I'd say: 'works okay'
One thing that annoyed me was calling a variadic function like printf was expensive ~100-120 bytes each call. Eight to Ten printf's --> 1k of flash gone. Far as I could tell most of it was pushing and popping stuff on the stack one byte at a time.
I ported a bunch of AVR code to an ARM Cortex[1]. Code size didn't increase much.
[1] ARM Processors are approximately half the cost of an AVR. Seriously not important if you're building 1000's of something. Important if you're building 100,000s.