no _thread module for STM32 B-L475E-IOT01A

[walecka]

When I attempt to import the _thread module, I am unfortunately met with the

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ImportError: no module named '_thread'

error. Am I correct in assuming that this means the library is not available? I am not sure what the requirements of _thread are, but I am fairly sure the STM32L475VG MCU on my board is capable of running it as I have used it to run some fairly RAM-intensive FreeRTOS programs in the past. Granted, that was in C and I am sure the interpretation of Python certainly adds a layer of complexity. Perhaps it has simply not been implemented for my board-specific port.

In any case, from the small amount of sniffing around that I have done on the forums, it seems like I am probably better off using uasyncio anyways. Would have liked to try my hand at writing a _thread application, but on the bright side this will likely save me hours of pain.

[jimmo]

error. Am I correct in assuming that this means the library is not available? I am not sure what the requirements of _thread are, but I am fairly sure the STM32L475VG MCU on my board is capable of running it as I have used it to run some fairly RAM-intensive FreeRTOS programs in the past. Granted, that was in C and I am sure the interpretation of Python certainly adds a layer of complexity. Perhaps it has simply not been implemented for my board-specific port.

Unfortunately the default firmware for the STM32 boards doesn't include the _thread module. There are custom builds available for pyboard (see http://micropython.org/download/pybv1/)

If you build the firmware yourself from source, you can add

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#define MICROPY_PY_THREAD (1)

to ports/stm32/boards/B_L475E_IOT01A/mpconfigboard.h to enable this.

In any case, from the small amount of sniffing around that I have done on the forums, it seems like I am probably better off using uasyncio anyways. Would have liked to try my hand at writing a _thread application, but on the bright side this will likely save me hours of pain.

My experience has been that asyncio is usually a much better alternative.