How to delay one clock cycle in STM32?

Question

The question is as simple as the topic. How to delay exact one clock cycle in STM32? If the controller runs at 168MHz, is one clock cycle equal to 1/168MHz, which is 5.95ns?

Berfield

It seems like this might provide the answer: #18221428 – Seraph

I just read the thread, thanks! It seems that the processor is running based on a different structure.. – Berfield

What could I do if I need exact timing to communicate with hardwares, such as a very high speed ADC? – Berfield

Answer 1

You can try to use assembly in your C code. Its quite easy with the asm() function. I believe it would look like this:

asm("NOP");

This is just the assembly instruction for 'Don't do anything for this PC tick'. Also you should make sure that your compiler does not optimize it out.

Bornholm