> -----Original Message----- > From: avr-libc-dev-bounces+eric.weddington=atmel....@nongnu.org > [mailto:avr-libc-dev-bounces+eric.weddington=atmel....@nongnu.org] On > Behalf Of Erik Walthinsen > Sent: Tuesday, December 11, 2012 9:03 AM > To: avr-libc-dev@nongnu.org > Subject: Re: [avr-libc-dev] [bug #37901] CRC-CCITT calculation incorrect > > On 12/11/2012 07:50 AM, Weddington, Eric wrote: > > We need to support the xmega users better. If they're getting easily > confused, then we need to help. > > It took me a while to discover that the Xmega "CCITT" wasn't the same as > the avr-libc function, and yes, the difference between _xmodem and > _ccitt isn't all that well described (esp if/since they're actually > inverse of each other polynomial-wise). Plenty of trouble finding the > right Python code to insert into my passive bus sniffer too. Not > looking forward to figuring out CRC-32 re: the NVM, the CRC module, and > python. That *should* be easier since they claim it's 802.3 and afaik > crc32 is quite a bit more standardized, but... > > The key for me was finding this page: > > <http://www.lammertbies.nl/comm/info/crc-calculation.html>
Sorry for the hassle, Erik. Thanks for telling your story and providing the link. Please send ideas for improvement. We're always open-minded, but just sticklers for detail (as I'm sure you can tell). Eric _______________________________________________ AVR-libc-dev mailing list AVR-libc-dev@nongnu.org https://lists.nongnu.org/mailman/listinfo/avr-libc-dev
