CRC function on SPC56EL70L5

tony2 · ‎2016-04-27

Posted on April 27, 2016 at 10:19

I try to use SPC56EL70L5-DISP(master) to communicate another board(slave) through SPI.

CRC-8 , polynomial, C(x) = x8 + x2 + x1 + 1 , is needed for the SPI last byte.

I attempt to use the SPC56EL70L3 build-in CRC function to check/generate CRC byte.

However the datasheet mentions it supports x8 + x4 + x3 + x2 + 1.

Is it possible for me to use the built-in CRC function?

And how do I configure the CRC reg(CRC_CFG, CRC_INP, CRC_CSTAT)

Thanks for help

#crc

Erwan YVIN · ‎2016-04-27

Posted on April 27, 2016 at 10:53

Hello Tony ,

There is an example :

SPC560Pxx OS-Less CRC Test Application for Discovery in Application Wizard

you can port from this application (CRC registers) from P Line into SPC56EL70L5-DISP

cf CRC32_use_CPU_test() and cf chapter 16.7 in the Reference Manual.

Best regards

Erwan

tony2 · ‎2016-04-27

Posted on April 28, 2016 at 05:31

Erwan, thanks for your reply.

The example you mentioned is not contained in my SPC5 Studio.

(http://imgur.com/SEOz4oP)

Can you upload it? Or where i can download it?

Erwan YVIN · ‎2016-04-28

Posted on April 28, 2016 at 09:29

Hello Tony ,

you have to play with some filters to find the test application

(cf screenshot)

Best regards

Erwan

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