Further code size reductions

[unwind]

Hi! I just ... was bored, and decided to go another round trying to shrink the code size of the minimatrix firmware.

If my comparison powers are working, the latest commit makes the output 88 bytes smaller than your HEAD.

Which ... isn't a lot at all, but at least it's something, right? :)

I haven't tested this on the actual hardware, so merge at your own risk. I'd be very interested to hear if it works, if you decide to use this code.

Also, I realize that offer for free hardware probably expired long ago, and I already got mine. This was just for fun.

Regards,

/Emil

[joshgoebel]

What is the absolute code size after these changes? I'm curious approx how much of the 4k is still usable if I wanted to add some graphics routines of my own.

[unwind]

Here's what the build says:

avr-size main.elf
text       data     bss     dec     hex filename
3830        276      31    4137    1029 main.elf

So it clocks in at around 93% full now, which doesn't really leave a lot of space, unfortunately.

Uh, or something. I really don't understand this fully; as far as I can see the ATtiny 4313 only has 4 KB of flash and 256 bytes of EEPROM, so I don't quite understand where the above fits. :)