How to install MicroPython on STM32F4 WeAct blackpill board?

It's not really clear how to install MicroPython on WeAct boards. This might help

Answer

First I got troubles when connecting board to usb-C PC port (burn the board !), so now I use USB-A port (which is only 5V).

That's not really clear when you buy the board on internet, but microPython firmware is not installed by default on WeAct boards.

Steps :

clone micropython repository : git clone https://github.com/micropython/micropython
go to boards subfolder : cd micropython/ports/stm32/boards/
clone WeAct board definition : git clone https://github.com/mcauser/WEACT_F411CEU6.git
cd ..
install gcc-arm : apt install gcc-arm-none-eabi
make submodules
make BOARD=WEACT_F411CEU6 : this should produce build-WEACT_F411CEU6/firmware.dfu file
add udev rule :
1. sudo nano /etc/udev/rules.d/99-weact.rules
2. set this content : SUBSYSTEMS=="usb", ATTRS{idVendor}=="0483", ATTRS{idProduct}=="df11", GROUP="plugdev", MODE="660"
plug the board in and perform :
1. press and hold BOOT0 button
2. press and hold NRST button
3. wait 0.5s
4. release NRST button
5. release BOOT0 button
dfu-util -l should list the board
flash micropython firmware via DFU : sudo make BOARD=WEACT_F411CEU6 deploy
unconnect/reconnect usb cable => it should work

How to verify that it works ?

How to program ?

You can use for example Thonny IDE :

(do not know if it's the better option as I just starting now)

What's blinky program ?

from pyb import LED
import time

led = LED(1)

while True:
    led.on()
    time.sleep(0.25)
    led.off()
    time.sleep(0.5)

Hope it will help !