topic Re: SENT Reference API in Components

SENT Reference API

Christian_L — Wed, 31 Jan 2024 14:41:00 GMT

Please post any comments, questions or feedback on the SENT Reference API in this thread.

SENT References:

NI Community: https://forums.ni.com/t5/Example-Code/SENT-Communication-Protocol-Reference-Example-in-LabVIEW-FPGA/ta-p/3536003

Wikipedia: http://en.wikipedia.org/wiki/SENT_(protocol)

SAE Standard: http://standards.sae.org/j2716_201001/

Digi-Key article: http://www.digikey.com/en/articles/techzone/2011/may/digital-communication-for-smart-modern-sensors

Rif.: SENT Reference API

d.marchei — Wed, 31 Jan 2024 14:42:14 GMT

Hi,

I am using the following driver to read data from a sensor by SENT.

https://forums.ni.com/t5/Example-Code/SENT-Communication-Protocol-Reference-Example-in-LabVIEW-FPGA/ta-p/3536003

I am able to read information but I have a problem with the CRC. The check is 90% wrong, even if the information is always right. Do I need to change something inside the CRC VI?

I have tried to use this library too (https://www.ni.com/en/support/downloads/tools-network/download.sent-driver-api.html), but I couldn't find the CRC.

Thanks!

Davide

Re: SENT Reference API

PPCCompany — Wed, 31 Jan 2024 14:43:05 GMT

Please post any comments, questions or feedback on the SENT Reference API in this thread.

SENT References:

NI Community: https://forums.ni.com/t5/Example-Code/SENT-Communication-Protocol-Reference-Example-in-LabVIEW-FPGA/ta-p/3536003

Wikipedia SEO: http://en.wikipedia.org/wiki/SENT_(protocol)

SAE Standard: http://standards.sae.org/j2716_201001/

Digi-Key article: http://www.digikey.com/en/articles/techzone/2011/may/digital-communication-for-smart-modern-sensors

Christian Loew, CLA
Principal Systems Engineer, National Instruments
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I think there's a bug in the XML generation.

Re: SENT Reference API

Kalin_T — Fri, 15 Apr 2016 21:19:09 GMT

Hi Christian,

Can the SENT Driver API be used with the R series PXI FPGA cards? Looks like a total of 2 digital channels are needed - 1 to receive, and 1 to send. Thanks.

--KT

Re: SENT Reference API

Christian_L — Wed, 31 Jan 2024 14:44:11 GMT

The SENT communication example provided in https://forums.ni.com/t5/Example-Code/SENT-Communication-Protocol-Reference-Example-in-LabVIEW-FPGA/ta-p/3536003 can be used with R series devices.

The SENT Driver API on the LabVIEW Tools Network (https://www.ni.com/en/support/downloads/tools-network/download.sent-driver-api.html) is a different set of code, and I'm not very familiar with it. But after taking a look at it, I don't see why it wouldn't work with the R series as well.

Re: SENT Reference API

aisiw_schaeffler — Wed, 24 May 2017 14:55:17 GMT

The CRC sub-vi does not seem to calculate the correct CRC value according to the SAE 2010 SENT protocol.

Re: SENT Reference API

Christian_L — Fri, 26 May 2017 15:00:48 GMT

By chance, would you have access to the CRC definition for the SENT protocol, that you could share with me, so that I can verify and correct the implementation?

Re: SENT Reference API

aisiw_schaeffler — Fri, 26 May 2017 15:12:56 GMT

Sure, Christian:

Here are the taken from SAE_J2716_Jan2010:

It seems that the original vi used different CRC implementation.

Re: SENT Reference API

Christian_L — Fri, 26 May 2017 18:17:12 GMT

Here is a LabVIEW implementation of the SAE 2010 SENT CRC code using the 5.4.2.2.2 16-element array implementation. I will include this in the example code next week, but wanted to share it with you so that you can use it before I have the chance to update the code. The default value for Initial CRC Value is 5 (binary 0101).This code tests successfully for all of the test cases in Table B.1-2.

Re: SENT Reference API

Friesenmartin — Fri, 16 Feb 2018 16:37:28 GMT

Hi Christian,

I ´d like to use your API with the NI-9401 to test our sensors. Do you tests the API until 1us TickTimes of sensors?

In our tests we must check a amount of about 30 sensors. Is it possible with e.g. 4 modules of the NI 9401?

Do you have some VIs to build the slow message from the fast message?

Best regards Martin

回复： SENT Reference API

GarettShi — Tue, 02 Jun 2020 06:50:07 GMT

Hi Christian：

First of all, I will give my warm appreciate thanks for you work that develop this API. The API has worked, according the SENT protocol 2010, I have understood the most of your API program. But I still have two doubts about the API.

1.In the "judge calibration length.vi", what's the right shift 2^22 used for? I can't find any data that described in the SENT-2010 protocol which corresponding 22 bit.

2.This doubts is the same with the fisrt one. In the "judge calibration ratio.vi", where those two data "77913238" and "75515908" come from in the red rectangle？ And where the 32 bit right shift come from the SENT-2010 protocol?

Thanks again for your hard work on this API.