Add host example that prints out info of connected devices

[tannewt]

This example shows an issue with the host event queue filling up on iMX RT 1060 EVK without an RTOS.

[hathach]

I run the example both with LOG=0 and LOG=1, it seems to work well. Could you post your Log here, also, do you have any other device (keyboard/mouse/drive) to test with. It is possible that the electrical stuff is not stable and cause lots of fake attach/remove event which overflow the stack.

PS: are you testing with low speed device, I may forget a thing or two with low speed.

[tannewt]

Yup, the device I'm seeing the failure with is low speed. Here is the device info output I get with LOG=3:

1 vid 045e pid 0040
Product: Microsoft 3-Button Mouse with IntelliEye(TM)
Manufacturer: Microsoft

I'll test with more devices I have here and follow up on this PR.

[tannewt]

A low speed (WASD Code) keyboard does seem to work:

1 vid 04d9 pid 0169
Product: 

Getting the product string does cause a stall though. That's why it is missing.

[tannewt]

I've added a speed print to the example.

I tested a second mouse of the same type and it shows the same issue. So, it is that particular mouse that has this issue.

I tested a bunch of other devices that do work:

Joystick from Thrustmaster:

1 vid 044f pid b10a
Full speed
Product: T.16000M
Manufacturer: Thrustmaster

EZUSB bootloader for Intellikeys:

1 vid 095e pid 0100
Full speed

Kensington trackball:

1 vid 047d pid 2048
Low speed
Product: Kensington Eagle Trackball
Manufacturer: Primax

BLE dongle:

1 vid 0a5c pid 21e8
Full speed
Serial: 5CF3708974A0
Product: BCM20702A0
Manufacturer: Broadcom Corp

Beagle 480:

1 vid 1679 pid 2001
Full speed
Serial: TP1126-722379
Product: Beagle USB 480 Protocol Analyzer
Manufacturer: Total Phase, Inc.

Card reader:

1 vid 0bda pid 0307
Full speed
Serial: 201006010301
Product: USB3.0 Card Reader
Manufacturer: Realtek

CP2104:

1 vid 10c4 pid ea60
Full speed
Serial: 01079392
Product: CP2104 USB to UART Bridge Controller
Manufacturer: Silicon Labs

USB stick:

1 vid 0930 pid 6545
Full speed
Serial: 0019E06B7102ED3110000081
Product: DataTraveler 2.0
Manufacturer: Kingston

CP2102:

1 vid 10c4 pid ea60
Full speed
Serial: 320c01251412ec11960c23c7bd930c07
Product: CP2102N USB to UART Bridge Controller
Manufacturer: Silicon Labs

RP2040 Feather

1 vid 2e8a pid 000a
Full speed
Serial: 4545373038053B38
Product: Pico
Manufacturer: Raspberry Pi

[hathach]

great work, thank you for more testing