SPIS incomplete RX transfer

[jhellen]

I am current evaluating the SPIS for the nRF52840 and experiencing incomplete transfers from a connected master (Arduino). I'm sending 'hello world'  from the master to the nRF and only receive a few (random) bytes before the NRF_DRV_SPIS_XFER_DONE event is raised The code looks as follows:

SPIS Check.cpp

The log looks as follows:

00> <info> app: Transfer ready tx = 0, rx = 6, rxBuffer = Hello
00>
00>
00>
00> <info> app: Transfer ready tx = 0, rx = 32, rxBuffer = Hello world
00>
00>
00>
00>
00>
00> <info> app: Transfer ready tx = 0, rx = 5, rxBuffer = Hello
00>
00>
00>
00> <info> app: Transfer ready tx = 0, rx = 2, rxBuffer = He
00>
00>
00>
00> <info> app: Transfer ready tx = 0, rx = 2, rxBuffer = He
00>
00>
00>
00> <info> app: Transfer ready tx = 0, rx = 10, rxBuffer = Hello worl
00>
00>
00>
00> <info> app: Transfer ready tx = 0, rx = 0, rxBuffer =
00>
00>
00>
00> <info> app: Transfer ready tx = 0, rx = 0, rxBuffer =
00>
00>
00>
00> <info> app: Transfer ready tx = 0, rx = 32, rxBuffer = Hello world

I also checked the SPI signals using a logic analyzer. This seems ok. 

Is there anyone out there who can tell me what I am doing wrong??

Thanks in advance,

Wim

[Susheel Nuguru]

Hi,

I tried to run a simple SPI/SPIS test with the same configuration as yours and do not see any rx data. I need to debug this to see why such a simple configuration is not working out of the box. Will come back to you hopefully tomorrow with more data.

[Susheel Nuguru]

I am sorry, I did not manage to get more info on this, I will come back to you mostly tomorrow. I suspect there probably is the problem with the pins used or the pull configuration on one of the pin

[jhellen]

I already tried some other pins, at least for the chip select. No luck. 

[jhellen]

Is there any news? In the mean time I started using  a UART instead of the SPIS.   With all respect, I find it  rather strange that no one seems to be able to answer this basic question I have. Am I the only one experiencing this kind of problems? Does it have something to do with MCU I'm using or .....

[Susheel Nuguru]

Sorry for missing this Jhellen, I somehow missed to follow this thread. Apologies for that.

I forgot what happened in my last test, so i need to test this again, sorry again, does not happen so often that I lose track of threads.