Hi, I am trying to implement a CRC-6 check for a Kubler encoder using LabVIEW. I've been there are 34 bits coming back from the sensor including multiturn bits, singleturn bits, status bits and CRC bits. These are used in the CRC calculation - see below. NOTE: There is no Lifecounter for my specific device so it can be ignored. The 6 bit CRC is also transmitted inversely, which I am assuming means that I will need to do a "Bitwise NOT" operator on them: I've taken the LabVIEW CRC calculation algorithm from the following post on this forum and modified so it fits a 6-bit CRC with initial value of 0x00 and a poly of 0x43: Solved: Re: Implementing CRC checksum CRC-8 with 0xFF initialization - Sensirion SHT85 - NI Community I get the data from the sensor as a Boolean array which I then manipulate and convert into byte arrray to then feed into the algorithm - which if done correctly should output zero. Unfortunately, I don't seem to be getting zero when I do this. A snippet of my code is shown below: I have also attempted a Lookup Table implementation of the algorithm which uses the pre-computed LUT mentioned in the comment within the snippet. I have luck with neither implementation. I would be grateful if someone can help me troubleshooting the code. The sample code which I have taken from my sensor is the boolean array as follows. Where the first (bit "0") can be ignored/disregarded for the calculation. Thanks 🙂

This should work. It's quick and dirty. You can probably make improvements. I found an exemplar on the web and it comes back with the correct CRC. I also did a CRC check of your "Useful Bits from Sensor" and it came back with the expected value of 0b111111 (0x3F). I also saved it as a previous version (2019) just in case you don't have the latest installed. version 2024 Q3

LabVIEW

CRC-6 for BiSS Communication

Solved!

I implemented without the LUT. Interesting it seems to perform better on my machine than the LUT VI. I will have a look into the LUT vi to see if I can make it more efficient

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LabVIEW

CRC-6 for BiSS Communication

Re: CRC-6 for BiSS Communication