3 WIRE SPI bi-directional communication

[Jose Cazarin]

Hello!

Does the SDK support a 3-wire SPI interface with bi-directional communication?

Like this:

Thanks!

[A.P]

Hi! I've tried what you've mentioned here, and it works as far as enabling SPI communication.

Jose Cazarin said:

We ended using the same SPI instance with different pins, we just need to enable/disable it every time we switch the device we are talking to

However, after configuring 2 SPI instances where one has MISO=PINX, MOSI unconnected, and the other has MISO= unconnected, MOSI=PINX, I see significant current leaks in all system modes (system on and system off).

I disable and uninit both SPI instances before entering low power mode.

Have you tested power consumption after using this solution? Have you modified your board in any way to accommodate this solution or was this strictly software?

Thanks!