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pass3master
Associate III
October 29, 2024
Solved

Question about the SPI communication clock

Question about the SPI communication clock

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

This topic has been closed for replies.
Andrew Neil
Andrew NeilBest answer
Super User
October 29, 2024

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.
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3 replies

Andrew Neil
Andrew NeilBest answer
Super User
October 29, 2024

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
Andrew Neil
Super User
October 29, 2024

@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.
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