RE: [avr-libc-dev] XMEGA hardware CRC calculation

[Stu Bell]

Sorry for the slow response on this - I'm just now catching up with this
mail list.  I use the canned CRC-16 Xmodem routines on my mega2560 code
and its pretty fast; certainly faster than a couple of seconds over the
190 Kbytes of code I have at this point.

Check out
http://www.avrfreaks.net/index.php?name=PNphpBB2&file=viewtopic&t=80723
for how I both compute it and add it and the length of the app to the
hex file (secret sauce: srec_cat).  I guess I could have used one of the
other CRC mechanisms in srec, but this one seemed okay.

I have no idea why the Xmega should be so slow other than your choice of
the checksum/CRC algorithm.  If it *is* the speed of reading flash, I
would be, well, surprised.  After all, you *run* from that flash, right?

Best regards,

Stu