SJA1105QEL config

[BravoEven]

Hello Everyone

      I am configing my SJA1105QEL via a SPI interface, I'v got the static config stream via tools like figure shows, but I cannot get the "CONFIGS" flag set at address 0x0001:bit 31 after writing the stream into the core. Are there any point I'v missed? Help please.

      Thanks.  #SJA1105 

[BravoEven]

By the way ,I just write the stream into the SPI interface one by one(for example: first word is the Device ID) and haven't cared about the structure of write fram shown in chapter3 of UM11040

[lukaszadrapa · Accepted solution]

Hi @BravoEven 

you need to send control word first before the stream. Did you send it? It's also mentioned in the user manual:

There's a sample code for this board:

https://www.nxp.com/design/development-boards/automotive-development-platforms/hardware-tools-access...

Link to the code is:

https://www.nxp.com/webapp/Download?colCode=SJA1105SMBEVM-SDK-FIRMWARE&appType=license

And here you can find a function which prepares data to be sent via SPI. As you can see, it creates control word at the beginning and then it appends the byte stream:

The function can be found in enet_app.c file.

I guess that this could be the source of problem.

Regards,

Lukas

[BravoEven]

Dear Lukaszadrapa：

     Your advice is very helpful！ Thank you very much for the demo code!

      Have a good day!