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 _______________________________________________ AVR-libc-dev mailing list AVR-libc-dev@nongnu.org http://lists.nongnu.org/mailman/listinfo/avr-libc-dev
