Microcontroller Quitting Mid-Script

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Loxy618
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Microcontroller Quitting Mid-Script

Post by Loxy618 » Wed Apr 24, 2019 2:07 am

I have scripts calling into c-functions and then going back to python specific code. I am trying to handle the case where the script jumps into a c function and incorrectly sets/gets a out of bounds value. At that point, I need to kill the script completely and return up the stack to where the script was initially executed from. This is running on a standalone micro controller with no keyboard or console attached. Suggestions. Thanks!

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dhylands
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Re: Microcontroller Quitting Mid-Script

Post by dhylands » Wed Apr 24, 2019 4:43 am

rasie an exception which is only caught by the code at the start point.

cduran
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Re: Microcontroller Quitting Mid-Script

Post by cduran » Wed Apr 24, 2019 2:26 pm

I have this same question. Are you suggesting a long jump? Will re-initializing python from within the C function work?

Loxy618
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Re: Microcontroller Quitting Mid-Script

Post by Loxy618 » Wed Apr 24, 2019 8:20 pm

I'm looking for something like this in MP

https://pythonextensionpatterns.readthe ... tions.html

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dhylands
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Re: Microcontroller Quitting Mid-Script

Post by dhylands » Wed Apr 24, 2019 9:55 pm

You can raise an exception from C by using nlr_raise. This will get caught by the python code. nlr_raise is essentially a longjmp.

You can also raise a SystemExit exception which will essentially do a soft reboot.

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