SPIS cannot handle discrete clock

[Brian_lau]

Currently my colleague and I are trying to connect his stm32 qfpn48 MCU to nrf52840 via SPI protocol.

I tried the sample in SDK and successfully setup a workable dummy SPI master to control SPIS nrf52840.

But nrf52840's spis cannot read the message from STM32 QFPN48 MCU, and I found the the clock from SPI master is discrete between bytes while NRF52840 SPI master is able to generate a continuous clock till the end of the message.

will this cause nrf52840 SPIS to read input message falsely? Is there anything can be done from SPIS side (nrf52840)? 

[Stian Røed Hafskjold]

Hi, with "descrete between bytes" do you mean that the clock is pausing for a while between the bytes? Do you have a scope trace of the SPI lines, so I can see how it looks? The SPIS slave should be able to handle this.