Question about the SPI communication clock

pass3master · ‎2024-10-29

Is it possible to output the SPI clock all the time, not just when reading and writing data?

Andrew Neil · ‎2024-10-29

No.

This is fundamental to the way SPI works - the Master only generates clocks during a transfer.

https://en.wikipedia.org/wiki/Serial_Peripheral_Interface

Why do you feel a need to do this?

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

View solution in original post

Andrew Neil · ‎2024-10-29

No.

This is fundamental to the way SPI works - the Master only generates clocks during a transfer.

https://en.wikipedia.org/wiki/Serial_Peripheral_Interface

Why do you feel a need to do this?

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

Andrew Neil · ‎2024-10-29

@pass3master if that's answered your question, please mark the solution:

https://community.st.com/t5/community-guidelines/help-others-to-solve-their-issues/ta-p/575256

It seems you have already started a follow-on thread on this:

https://community.st.com/t5/stm32-mcus-products/how-to-perform-spi-communication-within-a-board-master-and-slave/td-p/736869

A complex system that works is invariably found to have evolved from a simple system that worked.
A complex system designed from scratch never works and cannot be patched up to make it work.

pass3master · ‎2024-10-29

Sorry for the late reply. Your answer solved the issue so I will close it.