NCS SPI SCLK Goes idle between bytes

[JJac0b]

Hello,

I'm getting really weird behavior for SPI on my nRF52840 DK. I would expect the SCLK to be driven throughout the entirety of a transmission using spi_transceive, but I get the attached behavior instead.

Context: Trying to interface with AD7177, at this point just trying to read the ID register given in the datasheet. This works by first sending an 8-bit command and subsequently reading a 16-bit value.

[Turbo J]

Normal behavior when using SPI instead of SPIM. Only the latters supports DMA.

[JJac0b]

Ah, for some reason I thought I read somewhere that spim was set by default. Just added to my overlay and it's working properly now. Thank you

[drewbern]

I am getting the same result; the SPI cycles seems to be separated into chunks with idle CPU time within the transmission. I already have SPIM set, so I am confused as to why this is happening. Any assistance would be appreciated.