Hi, I need advice on how to calculate checksum in a line of intel hex file format. Basically I understand how it need to be calculate but to write it in VB code is.
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Online CRC Calculation. Be careful: there are several ways to realize a CRC. They differ (at least) in the way which bit is shifted in first and also in the initialization of the flipflops. Enter your CRC polynomial as bit sequence ('100110001') here: This gives the following CRC polynomial (press RETURN to update): P (x) = x8+ x5+ x4+ x0. 2019/02/12: Added the support for 64bit CRC calculation and for binary string input. 2016/11/11: Added the option to print the CRC lookup table 'reversed'. 2016/07/27: Fixed a bug: A hexadecimal value with more than two digits after the '0x' is not correctly parsed.
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Toolset C166 | PC Tool for adding a CRC checksum to an Intel HEX file Hello,does anyone know of a PC-based tool, that adds a CRC16 checksum at a given address in an intel HEX file? I would like to add an offline-CRC to my generated H86-file. thanks, Roman |
Posted 23-Apr-2004 15:51 GMT | RE: PC Tool for adding a CRC checksum to an Intel HEX file Try http://srecord.sourceforge.net(don't be put off by 'S-Record') |
Posted 24-Apr-2004 16:32 GMT | RE: PC Tool for adding a CRC checksum to an Intel HEX file Thank you very much! This seems to be a great tool for doing that kind of HEX-file manipulation.Roman |
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I'm trying a few days to get the type of the CRC with the following hex stream (sniffed with wireshark):
The Hex data i sniffed:0000001ec001075465737431323308557365726e616d650850617373776f7264d224
Hex Checksum Calculator Online
This should be the DATA in HEX:0000001ec001075465737431323308557365726e616d650850617373776f7264
So the last 4 digits are the checksum, in this case d224
I used many code snippets (PHP, java), and some online checksum calcuation sites:e.g.:http://www.scadacore.com/field-applications/programming-calculators/online-checksum-calculator/
But I don't get the correct CRC value.
Thanks!
Update 1
Here are more hex streams with CRC included (the last 4 digits):
- 0000001dc001045465737409557365726e616d65310950617373776f726431cc96
- 0000001dc001045465737409557365726e616d65320950617373776f72643289d9
- 0000001dc001045465737409557365726e616d65330950617373776f726433b51c
- 0000001dc001045465737409557365726e616d65340950617373776f7264340347
- 0000001dc001045465737409557365726e616d65350950617373776f7264353f82
1 Answer
It appears to be the ARC CRC, polynomial 0x8005, reflected, zero initial value and no final xor, if I discard the initial 0000001d on each message, and take the CRC at the end to be put in the stream in little-endian order.