Arduino for STM32

So i was making great progress in learning how to program this chip. uploaded several Arduino INOs, no problem. All of a sudden, I can't get it to upload. Device manager shows it it is in DFU mode. when I pull the jumper off of 3.3v B0 it goes into STMicroelectronics virtual mode. All seems normal ...

1st STM32 problem solved, 100% user. needed to add a ground wire between STM board and servo.

this simple example works.
/* Sweep
by BARRAGAN <http://barraganstudio.com>
This example code is in the public domain.

modified 8 Nov 2013
by Scott Fitzgerald
https://www.arduino.cc/en/Tutorial ...

Links are in my first post. Github

Perhaps someone could post a servo sweep code that should work with Adafruit stm32f405 and I can upload and see if it works? I am okay starting this learning process on a slow curve.

This is an example I was able to get to work with the pin# as I assigned it. it only turns one motor from the push of a key on the keyboard so not too useful.
To get this to work I entered pin #D4 or D5 orD6 or D7 or 4, 5, 6, 7 and it worked on A), A1, A2, A3

/*
Spin a brushless motor using an ...

I am new to the STM32duino but familiar with programming Arduino. usually libraries are not to hard to load and get running on Arduino boards or ESP32 boards but I cant seem to figure out STM32. I do have the STM32 core installed and can load blink and it works. I am trying to get a servo library to ...

Hi I'm Matthew. I like tinkering. 👍
I'm always working on a project that includes motors, servos and microcontroller.

I've tried to use STM32cube and related stm32 tools but with limited programming knowledge I couldn't figure it out. I have done quite a bit with Arduino, but still I struggle with ...