USBH_MIDI : Failing to get device descriptor with some devices.

[soulwyx]

USBH_MIDI : Failing to get device descriptor with some devices.
The problem is at line 163 from USBH_MIDI.cpp: (Init)
rcode = pUsb->getDevDescr( 0, 0, sizeof(USB_DEVICE_DESCRIPTOR), (uint8_t*)buf );

With some devices work fine, and with others doesn't.
(return 0 when successful ; 8 when error )

Looking deep, the problem come from:
Line 206 from USB.cpp
rcode = dispatchPkt(tokSETUP, ep, nak_limit); // Dispatch packet

Any tips?

I can get device descriptor of any devices without using USBH_MIDI (without creating USBH_MIDI class)
I can get device descriptor from my PenDrive, and return that isn't a MIDI Device.
I can't get device descriptor from my Mouse by example, returning the RCODE equal 8.
My Zoom G3 works fine. My Nux MG300 doesn't.

[soulwyx]

I got it:

I got it!
I need to do many things:
Let's explain:
Need to remove Release from USBH_MIDI.h
//virtual uint32_t Release();
and

/*
uint32_t USBH_MIDI::Release()
{
        pUsb->GetAddressPool().FreeAddress(bAddress);
        bNumEP       = 1;               //must have to be reset to 1
        bAddress     = 0;
        bPollEnable  = false;
        readPtr      = 0;
        return 0;
}*/

Plus:

#define DESC_BUFF_SIZE        512
#define MIDI_EVENT_PACKET_SIZE 128

Without Release();
I have some fails when pluggin a device. And I always must restart my board to connect another device.

Do you have any suspicions to explain this? I want to understand.
Thank you.