Query regarding HAL_GetTick() - what happens when SysTick timer rolls over through zero?

John123 · ‎2024-05-06

Hi - I'm using HAL_GetTick(), and then subtracting one value from another to determine a GPIO input pulse width.

What happens if I happen to to call HAL_GetTick() around the point where the SysTick timer rolls over through zero.

Do I need to watch out for this situation generally?

Regards, John.

Peter BENSCH · ‎2024-05-06

Yes, you have to consider this problem. Typically, this is only used to determine time differences to a previously saved value, which eliminates the problem, as discussed here, for example.

Hope that helps?

Regards
/Peter

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Peter BENSCH · ‎2024-05-06

Yes, you have to consider this problem. Typically, this is only used to determine time differences to a previously saved value, which eliminates the problem, as discussed here, for example.

Hope that helps?

Regards
/Peter

In order to give better visibility on the answered topics, please click on Accept as Solution on the reply which solved your issue or answered your question.

John123 · ‎2024-05-06

Many thanks.