New in NRF52 : SPI slave clock out Def as first byte on MISO

RE: New in NRF52 : SPI slave clock out Def as first byte on MISO

Martin Lesund — Wed, 25 Apr 2018 13:13:18 GMT

Hi Mohcine,

I think this can be related to devzone.nordicsemi.com/.../nRF52_5F00_PAN_5F00_109_5F00_add_5F00_v1.1.pdf, which have a workaround incorporated in SDK v13. (workaround in chapter 3.9 in included .pdf)

Do you have to use SDK v11? (if so, try adding a dummy first byte to SPIS transmit data)

If not, could you try that same example from SDK v15 and see if the problem consist?

RE: New in NRF52 : SPI slave clock out Def as first byte on MISO

MBarazz — Tue, 24 Apr 2018 14:49:41 GMT

Thank you for replying to my question.

Blue : CS / Yellow : MISO

as you see, my master is reading 3 bytes (SOF) -> cs is low to receive 3 firt bytes, normally it should be (0xA50001), but finally my nrf spi slave clock out (0xffA500)

My SPI slave settings :

* MISO_PIN : 16

* MOSI_PIN : 15

* SCK_PIN : 17

* CS_PIN : 23

----------------

Mode : Mode_0

DEF : 0xFF

ORC : 0xFF

RE: New in NRF52 : SPI slave clock out Def as first byte on MISO

Martin Lesund — Tue, 24 Apr 2018 14:04:01 GMT

Hi Mohcine,

Have you checked the lines with a logic analyser, to see what is going on? (please provide this)

Also, could you provide the settings for your slave? (mode etc.)

Best Regards,

Martin L.