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Spi_issues

Nero

Hello, I am using nRF SDK 12.2.0 , with nRF52832 on pca10040 hardware, and working with the example in examples/peripheral/spi/main.c to develop a driver for LIS2DE12.

Initially I was working on integrating a library, and found via Tera term (uart communication) that every other SPI byte output had a 0xFF appended . every other call to nrf_drv_spi_transfer(), The only modification I made was to change the SPI pins. Any ideas as to what's going on?image description(/attachment/aafcc184333cd473cba77b3053097890)

Thanks!

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    Hi Amed

    It sounds like you have hit issue 58 in the nRF52832 errata (scroll to page 12).

    This bug will make the SPI output an extra byte when you are only sending/receiving a single byte. If you send more than 1 byte the issue does not occur.

    There is a workaround described in the errata that makes it possible to stop the SPI in time, and avoid the second byte.

    Best regards
    Torbjørn

  • 0 in reply to ovrebekk

    Hello Torborjn , Thanks , As I'm say i had the problem SPI bus ,but i don't have a logic analyzer , but when debug my project i 'm getting the following result. I will see if this is really this problem nRF52832 errata .thanks a lot for response.

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  • 0 in reply to ovrebekk

    Hello Torborjn , Thanks , As I'm say i had the problem SPI bus ,but i don't have a logic analyzer , but when debug my project i 'm getting the following result. I will see if this is really this problem nRF52832 errata .thanks a lot for response.

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