Advanced reflashing failed, port cant detected on my computer

Hi All,

I was trying to upload my embedded C code to the Espruino pico.
I generated the hex file with my code from the stm32cubeide and converted it to a dfu file, then follow the advance reflashing procedure: https://www.espruino.com/Pico to upload the code to Espruino,
after all this, the pico stop responding, my computer does not detect the Espruino pico port anymore. (DfuseDemo can still detect the pico if it's in bootload mode)

I then downloaded the lastest bin: espruino.com/binaries and try to flash it with this bin, but the pico port still can't be detected.

If I want to upload C code to Espruino pico, is this the right way to do?
Did I break the board by just doing this?

Thank you for your help

Also, for testing purposes, I am trying to light up the LEDs from the C code, but somehow I can not find any information which ports and pins LEDs are connected to. If anyone knows the LEDs' ports and pins, could you please let me know as well? Thanks

The issue is solved

Hi - how did you sort this out in the end?

If you need to see where peripherals are connected, just check out: http://www.espruino.com/Pico#pinout

The pin names refer specifically to the actual pins on the STM32