Hex File Crc 16 Calculator
File Crc Calculator
CCS:: View topic - CCS intel HEX CRC calculation CCS does not monitor this forum on a regular basis. Please do not post bug Reports on this forum. Send them to ->:: Author Message ncubed Joined: 27 May 2014 Posts: 1 Location: ישראל CCS intel HEX CRC calculation Posted: Tue May 27, 2014 3:57 am Hi, CCS PICC creates an Intel HEX file, with the last line containing a 16-bit CRC code. Presumably, this is a CCITT-16 code of the file. Does anyone know if all characters are passed through the CRC register or binary data translated from the HEX? Any help would be appreciated.
Hex Crc-16 Calculator
Best regards Noam ckielstra Joined: 18 Mar 2004 Posts: 3680 Location: The Netherlands Posted: Tue May 27, 2014 5:15 am The checksum is a simple sum of the bytes in Flash memory and the Configuration bytes, i.e. It is not a CRC. In the past there have been troubles with this checksum changing between compiler versions. Because documentation on this topic is poor it is difficult to say which variation is wrong or bad.
CRC Calculator (Javascript) CRC width RadioButton: CRC-8 CRC-16 CRC-32. (Cyclic Redundancy Check) calculation for an detailed discussion of CRC calculation.
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Perhaps you are better of to write your own checksum calculation routine, then at least you know what is tested and you control the algorithm changes. Here is an old 2003 discussion on the topic with an algorithm by Darren Rook (a CCS guy) that should give you a head start. In a 2012 thread another algorithm was presented but I don't trust this one as it is a CRC16 algorithm and not a simple summation: bkamen Joined: 07 Jan 2004 Posts: 1530 Location: Central Illinois, USA Posted: Tue May 27, 2014 10:43 am You could always read up on the Intel Hex format. It's CLEARLY explained there. _________________ Dazed and confused? I don't think so.