I need to check my CRCs on my AVR to make sure im doing them right. Is there a CRC calculator out there where I can enter a custom poly? I cat seem to find one using the poly I am, which is the maxim 1 wire 8 bit CRC: x^8 + X^5 + X^4 +1

I can figure it out by hand but i cant seem to grasp how to use a calculator (or if thats possible) to figure it out.

For example, with a cleared CRC, 0x81 will generate a checksum of 0xD2 which is right according to my AVR and my hand calculations on the white board. How can I use a calculator to do the dirty work?

I can figure it out by hand but i cant seem to grasp how to use a calculator (or if thats possible) to figure it out.

For example, with a cleared CRC, 0x81 will generate a checksum of 0xD2 which is right according to my AVR and my hand calculations on the white board. How can I use a calculator to do the dirty work?

Paul "Chupa" Mac