Using nRF52832 SPIM to pilot a Display Controller in 4-bit SPI ... DCX Solution?

[Paul++]

Using 4-bit SPI mode on the Display Controller side: SCL,MOSI,MISO ... and DCX (by which the controller distinguishes between command bytes and data bytes). There's no obvious way for nRF's SPIM to control the DCX signal in concert with the SPI signals at full rate.

Perhaps there is an un-obvious way...?

Best option I have at this moment is to "manually" set DCX either HI or LO before the SPI transfer and to enact 2 transfers: 1st for the Command, 2nd for the Data.

Is there not a more efficient way?

[Jørn]

What is the name of the controller you are using?

[Paul++]

Raydium RM67160 controlling a USMicro AMOLED: A0095-01800120C-40B0

[Jørn]

I apologise for my late answer. Unfortunately I haven't found any "un-obvious" way to properly handle this. I believe that doing it "manually" as you stated is your best bet.

[Dera]

Did you do it?