Is there a way to prevent the CPU from automatically entering sleep mode?

RE: Is there a way to prevent the CPU from automatically entering sleep mode?

Simonr — Fri, 24 May 2024 07:55:30 GMT

Hi Kentaro

Yes, it can be easily implemented as a while-loop.

Best regards,

Simon

RE: Is there a way to prevent the CPU from automatically entering sleep mode?

Kentarou — Fri, 24 May 2024 06:23:50 GMT

Hi,

Thank you for your response. It might be obvious, but just to confirm, the low-priority thread is implemented with a while loop, as I mentioned earlier, to prevent it from going idle, right?

Best regards,

Kentaro

RE: Is there a way to prevent the CPU from automatically entering sleep mode?

Simonr — Thu, 23 May 2024 07:23:19 GMT

Hi Kentaro

After a chat with one of the in-house RTOS experts they also recommend that the easiest/best way to do this is to have a low-priority thread running when you want to avoid the project to go into idle mode.

There is a complex way to do this as well through the power management using using pm_system_suspend, but there are a lot of things that could go wrong, so we wouldn't recommend that unless you want some extra (unnecessary) work on your hands.

Best regards,

Simon

RE: Is there a way to prevent the CPU from automatically entering sleep mode?

Kentarou — Thu, 23 May 2024 00:03:25 GMT

Thank you for your prompt response! I look forward to your reply.

Best regards,

Kentaro

RE: Is there a way to prevent the CPU from automatically entering sleep mode?

Simonr — Wed, 22 May 2024 12:21:38 GMT

I don't think there is a way to dynamically enable/disable the automatic sleep mode unfortunately, as this is an inherent behavior in the Zephyr RTOS if I recall correctly. But let me discuss this with a colleague and get back to you with a surefire answer tomorrow. I think having a low-priority thread running would be the way to go though.

Best regards,

Simon