How to install machine library into micropython

[stuarte83]

Hi,
I have managed to install micropython onto an official stm32f407vgt6 discovery board. I am trying to get the board to output pwm signals to an active buzzer to generate a few tones. To do this, I need to have the machine library installed.

So, how do I install the machine library into the micropython that is running on the discovery board ?

[robert-hh]

The machine module is part of the firmware and already present. Just try import machine and help(machine) .
What might be irritating is, that there is no machine.PWM class at the STM32 port. You have to use the pyb.Timer class. See https://docs.micropython.org/en/latest/pyboard/quickref.html#pwm-pulse-width-modulation

[stuarte83]

Hi robert-hh,

Thanks for such a swift(!) reply. "import machine" (without quotes) is the first line in my script. I am using Thonny. Where do I do "dir(machine) , in the Thonny shell or in Konsole ? (I am just starting just Micropython so that explains my ignorance wrt Python)

[robert-hh]

Use the REPL console. And since you are starting, it may be best to get used to mpremote instead of Thonny. Even if that is a larger first step, it will save you later from trouble.

[jonnor]

@stuarte83 have you actually selected your MicroPython board in Thonny runtime selector (bottom right corner)? If not, you may be running with CPython on your PC... (where there is no machine module).