SAMD21 USB does not enumerate on Windows

[deanm1278]

Hello!
I can no longer get Circuit Playground to enumerate on Windows 10. Works on Linux, Mac, iOS. It does work on the Makecode live site, but does not work when I compile regular codal from the current master branch.
Note that I tried reverting my recent PR #32
it still does not work

here is the code I am using:

#include "CircuitPlayground.h"
#include "USB_HID_Keys.h"
#include "HIDKeyboard.h"
CircuitPlayground cplay;
CodalUSB usb;
USBHIDKeyboard hid;
static const char *string_descriptors[] = {
    "Example Corp.", "PXT Device", "42424242",
};
void typeDot(Event)
{
    hid.type(".");
}
void typeDash(Event)
{
    hid.type("-");
}
int main()
{
    usb.stringDescriptors = string_descriptors;
    usb.add(hid);
    usb.start();
    //we need a bit of a delay for USB
    cplay.sleep(500);
    cplay.messageBus.listen(DEVICE_ID_BUTTON_A,DEVICE_BUTTON_EVT_CLICK,typeDot);
    cplay.messageBus.listen(DEVICE_ID_BUTTON_B,DEVICE_BUTTON_EVT_CLICK,typeDash);
    release_fiber();
}

[ladyada]

@jamesadevine @pelikhan @mmoskal hihi poking this, if anyone has any suggestions or can try replicating? (both dean and i found this bug)

[jamesadevine]

Thank you for the poke @ladyada.

After some LED debugging (my favourite kind), I realised that the program above was not even hitting main.

A bad change on my part to the Serial interface meant that it was using an uninitialised pin instance (I don't know how I didn't catch this on my test... compiler magic?).

Anyway, fixed:

lancaster-university/codal-circuit-playground@326efd9

and tagged:

lancaster-university/codal-circuit-playground@5b11a92

[finneyj]

thanks @jamesadevine.

[jamesadevine]

@finneyj The enumeration issue still exists on Win 10, that I have not fixed yet. I have reproduced locally, just acquiring the correct software to debug...

[finneyj]

ahh... I was about to print you a gold star. ;)

[jamesadevine]

If only I could ever be worthy... 😉

From my usb analyser now know the reason for non-enumeration on win10 – it's because the cplay does not return a device descriptor, it says there is "No such device". More debug required, but I got to dash.

@mmoskal do you have any cycles?