• State Not Answered
  • Replies 16 replies
  • Subscribers 64 subscribers
  • Views 1093 views
  • Users 0 members are here
Attachments (0)
Nordic Case Info
  • Case ID: 308597
Options

change device name through spi

NRM

hi

Working with Linux operating system I faced the problem not knowing how can the nrf52840 device name be changed via the SPI protocol and what frame format should be used?

I would appreciate if you help me with step by step guidance.

Many thanks

  • 0 in reply to NRM

    Is this actually running on a custom board, or on the DK?

    If it is on the DK, the reason it doesn't work is that the pins P0.17 and P0.22 are not routed out to the GPIO headers by default. If you look on the back of the DK, it shows you some of the pins and their use. e.g. pin P0.13-P0.16 are used for the LEDs (but they are routed out, so that is OK, as long as the application are not trying to control those GPIOs by toggling LEDs at the same time as you are trying to use them as SPI pins).

    However, P0.17 and P0.22 are used as QSPI pins for the external flash chip on the DK, so these are not connected to the GPIO headers. You can see on the back of the DK what solder bridges you would have to cut and solder in order to do so. For these specifically, you would need to:

    P0.17: cut SB17, solder SB23

    P0.22: cut SB15, solder SB25

    Alternatively, test with different GPIOs, if you want to do it on the DK.

    Best regards,

    Edvin

  • 0 in reply to Edvin

    These examples were tested with changed pins on both the DK and the custom board and both have the same problem.

    The photo below is taken of the SPI pins (cs:P0.24,CLK:P0.15,mosi:P0.17,miso:P0.22) on the DK :

  • 0 in reply to NRM

    That is not a Nordic nRF52840 DK.

    So when testing on the DK, did you modify the solder bridges like described in my previous reply?

    And do you connect MOSI -> MOSI and MISO -> MISO in your SPI connection? And CS/SS -> CS/SS and CLK -> CLK?

  • 0 in reply to Edvin

    Hello Edvin

    I succeeded to get the data from the slave on the custom board.

    thanks for your reply.

    Best regards,

    Nasim

  • 0 in reply to NRM

    Hello Nasim,

    I am glad to hear! If it is not too much of a problem, I am curious to know what the problem turned out to be. It would also help knowing these common pit falls, to be able to help other users quicker in the future. 

    Best regards,

    Edvin

Related