3-wire SPI Configuration

[SPraj.15]

Hello,

Currently i'm working on STM30F030 controller.

I want to connect TFT display with this controller, display has three pin for SPI (SDA,SCL & CS) and used only for write operation.

so how to configure controller for 3-wire SPI

If i have to connect MOSI(controller) pin with SDA(display)and left MISO pin as it is, it is ok ?

any problem occur during communication if MISO is floating ?

Thank you

[waclawek.jan]

There's no problem with not using MISO. You don't even need to assign a pin to MISO in the GPIO AF matrix.

JW

[Danny0007]

Hi @SPraj.15 

this is an old thread, but I´m still curious if you made the 3-wire SPI working?

I`m struggling with it already for days...