I did not use any GHI board as a basis. I know you may argue on that
The power has two “options” : external power with two OKI-78SR modules (one for 5V and one for 3.3V) and USB power with a MC33269 to get the 3.3V.
I say it’s weird because if I boot in bootloader mode, then I can see the GHI bootloader device.
@Gus_Issa : I will have to buy such a hub but I’ve made some other tests and the issue is not really the same now and seems partly caused by my PC.
On two ports of my PC the board alone (without external power) is not seen by Windows. On those ports, if I add external power, then the board is seen by Windows.
On other ports, I have to reset the board (reset button) once plugged for Windows to see the USB devices.
On another PC, same behaviour : I have to plug the board and then reset it to see the USB device.
Once resetted and USB device seen by Windows, everything is working fine (without external power) : I can debug or use TinyCLR config.
Kind of strange behaviour, isn’t it ?