Call function in file from C

[danimasa]

Hello

How can I call a function from inside a python file from C?

I'm running mp_compile but the return value is a function not a dict, and running the function returns a NoneType.

I need to execute a function with a known name from the file.

[dlech]

This is done essentially the same way it is done from Python. First you need to import the module that contains the function. This could be done, for example, by calling mp_builtin___import__ with the appropriate args that are the equivalent of from module import function. This will return the function object and you can pass that object to mp_call_function_* along with any required args for that function.

[danimasa]

It's being called by another task in RTOS, maybe I have to create a specific task for micropython and call it throught a queue. I will try that.

[dlech]

Sounds like a job for mp_sched_schedule()?

[jimmo]

It's being called by another task in RTOS, maybe I have to create a specific task for micropython and call it throught a queue. I will try that.

Yes like I said above -- "You can only call into the MicroPython VM and runtime from the MicroPython task (or a task that belongs to a MicroPython thread)."

mp_sched_schedule is a good option assuming you have some way of passing the required state (remember you cannot allocate on the MicroPython heap from outside a MicroPython task either, although it's fine to use the IDF heap of course). Otherwise you need to have some sort of queue, or a way to synchronise with the MicroPython task (see https://github.com/micropython/micropython/blob/master/extmod/modbluetooth.c#L1191 although I do not necessarily recommend this approach)

[danimasa]

In my case I think it's better to run micropython in a different thread, because I don't want to stop the execution of the thread to process the logic written in python. Then I put the micropython in a new task and syncronized it using a queue. But I'm getting a new error when I call the function, I think it's related to my script: TypeError: unexpected keyword argument '__new__'.

I don't understand the usage of mp_sched_schedule, how do I receive the response from a function I have called? Is it a way to run a function from another thread?

[danimasa]

I resolved the error, the problem was I allocated the args in the heap, after putting it in the stack the problem resolved.