(ULP 2.1) Detected SW delay loop using empty loop. Recommend using a timer module instead

In this case the timer module does not make sense. while(1); is a trap. The compiler just detects, that you are waisting power by having a software loop for doing nothing over a period of time. To save power, the ULP advisor recommends to use a timer for intervals where nothing has to be done. For example: You want a software delay of 1s, then you can do a for-loop that is executed for 1s doing nothing, but having the processor running at full speed. But you could also start a timer, that generates an interrupt request in 1s, having the CPU running in a low power mode to save energy. The ULP simply detects a software loop, but cannot determine it's task, of course. So it warns you to have a closer look at it. If you decide that this is OK, then everything is fine. A warning isn't a problem simultaneously in every case.

But be careful - such software loops may be optimized away by the compiler.

Dennis

Hi Dennis,

Thanks very much for your well explained answer.

Canberk