Is this god build instructions yet?

Hi,

I have (had) a DIY printer based on RAMPS (ATMega 2560) but some short on a motor killed the Mega and related hardware... as I have a Octoprint I was evaluating to use a bluepill for the main controlled and Octoprint for the human interface, as it's the same MCU on the Malyan M200 v1

I Have followed the instructions on this repo (platformio build) and also the ones on the archived examples of Marlin here (https://github.com/MarlinFirmware/Marlin/tree/bugfix-2.0.x/config/) that builds on the Arduino IDE.

I have managed to build both versions of the firmware but none of them worked, there is no output on the serial, nor USB/Serial.

I have followed the hack log here: https://hackaday.io/project/158263/logs?sort=oldestv and seems to me that the Instruction archive on the examples of marlin here https://github.com/MarlinFirmware/Marlin/tree/bugfix-2.0.x/config/ are the most up to date.

Please:

What/Where are the most up to date instructions?
What takes to compile and uploads the Marlin firmware to a Bluepill and craft a cheap clone?

PS: I have crafter basic samples of code on the Arduino IDE setup using the 3D printer boards using Malyan M200 v1 (blink, serial hello world, etc) and they does not work;

I have uploaded it via 3 different methods:

Serial via A9/A10 and boot1 to 1 using default bootloader
Using stm32duino bootloader
Using a STLINK upload: "st-flash write Marlin.bin 0x8000000"

xC0000005 / M200Toolchain

Is this god build instructions yet? #3