RE: About [195] SPIM: SPIM3 continues to draw current after disable

Einar Thorsrud — Tue, 26 Mar 2019 14:15:05 GMT

Hi,

I am having a bit of problems following the last parts of your question, describing what you have done. For instance, you do something that cause a "system reboot". A reset is typically triggered by an error check, so this might be what you are seeing. You should be able to see what is happening by using a debugger. I also do not understand why you mean by system being normal when you remove the call to idle_state_handle(). It would probably be easier to understand if you show your code.

That aside, you can try the following to make sure that the SPIM3 peripheral doe snot consume any power while not being used. Once you are don with it, uninitialize the driver and execute this snippet, which essentially resets the peripheral:

*(volatile uint32_t *)0x4002FFFC = 0;   // Power down SPIM3
*(volatile uint32_t *)0x4002FFFC;       //
*(volatile uint32_t *)0x4002FFFC = 1;   // Power on SPIM3 so it is ready for next time

Then you just need to initialize the driver again before using it the next time.