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FXPS7115DS4T1

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FXPS7115DS4T1

‎03-25-2025 04:53 AM
2,301 Views
Fast
Contributor V

Can anyone share SPI messages with calculated CRC. To start and read pressure and temperature?

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3 Replies

‎03-25-2025 05:56 AM
2,290 Views
Fast
Contributor V

Thank you Jozef, I have looked at that but I do not need CRC and it is desperately slow to live calculate. I will attempt to use online tool to calculate CRC. Surely someone has a real example, not a code example? Perhaps it will get supported with SPIGen.exe, which is very useful tool.

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‎04-02-2025 03:49 AM
2,233 Views
Fast
Contributor V

No examples only code. I'll look at the Infineon and ST offerings

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‎03-25-2025 05:44 AM
2,285 Views
JozefKozon
NXP TechSupport
NXP TechSupport

Dear Richard,

unfortunately I didn't find the FXPS7115D SPI messages (perhaps somebody else will share them) in older cases, but I have found a description for CRC calculation from an application engineer. Please see below. 

In order to build CRC checksum on the SPI command, you can take ”8-bit crc” fields as either ‘0000 0000’ or ‘1111 1111’ to complete the total 32-bit command. Calculate 8-bit CRC using the default polynomial on the 32-bit command and then replace calculated 8-bit CRC value in the ”8-bit crc” fields before sending the command. If the calculated CRC does not match the transmitted CRC, the command is ignored and the device responds with the SPI error response.

I have also found FXPS7xxx SW examples. Please find it attached. 

With Best Regards,

Jozef

fxps7xxx.zip
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