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]

The example seems to be working fine

Also works the same with your code.

I realized that last time I misconnected the pins.

[jhellen]

Thanks for testing! Weird that it doesn't work over here. No idea why I get spurious events. Could it have something to do with the radio or some noise on the pins? I'm using a ANT+ softdevice as part of the design. Tried it without though, same result. Perhaps at the end of the week  I have some spare time to look into it again. Maybe I should start from scratch.

Again, thanks for your support.  

Regards Wim

[Susheel Nuguru]

no problem, there might some configuration issue or maybe you are using the some of the pins that are using by SPI for something else somewhere? SPI and SPIS are very well tested solutions, i would be surprised if they did not work.