I have just joined the STM32duino world, after buying a few boards. One of these is a Maple Mini clone by Baite
, BTE14-07, bought on AliExpress. It came with its bootloader, which was working fine until I decided to upgrade it. To make a long story short, I am experiencing the very same behaviour that rolo has been talking about here. As soon as I flash the new bootloader (maple_mini_boot20.bin from 24 days ago), the onboard led no longer flashes. I can then perform the upload of a single sketch, but then the board is no longer detected until I reflash the bootloader.
The sketch I uploaded was a simple Blink, but the led never starts blinking. So maybe the new bootloader doesn't allow the sketch to start?
Going back to the 11-months old maple_mini_boot20.bin solves the issue: the led blinks at boot, then my sketch starts up and the led starts blinking as per the sketch itself.
So I can confirm there is undoubtedly an issue with the newish maple_mini_boot20.bin.
On the contrary, I also flashed the newish generic_boot20_pa1.bin on this board
and it seems to be working fine.
For the record, I am on Linux and flashed all of my bootloaders through stm32flash.