examples/host/device_info/README.md - third_party/github/hathach/tinyusb - Git at Google

 # Host: Device Info

 A USB host example that enumerates any attached device and prints its descriptor information over the debug UART. No class drivers are enabled — only the hub driver, so it works with any kind of device.

 ## What it does

 - On mount of any device, fetches and prints the full device descriptor: VID/PID, USB version, device class/subclass/protocol, max packet size, bcdDevice, and number of configurations.
 - Reads and prints the manufacturer, product, and serial-number string descriptors (UTF-16 to UTF-8), falling back to a placeholder serial when none is present.
 - Blinks the board LED, with a faster pattern while no device is mounted.
 - Builds on either the bare main loop or a FreeRTOS task, depending on `CFG_TUSB_OS`.

 ## Requirements

 The board must support USB host mode (provide VBUS to the connected device); some boards need an external USB-A port / host adapter.

 ## Configuration

 Notable `tusb_config.h` settings:

 ```c
 #define CFG_TUH_ENABLED             1
 #define CFG_TUH_HUB                 1
 #define CFG_TUH_DEVICE_MAX          (3*CFG_TUH_HUB + 1)
 #define CFG_TUH_ENUMERATION_BUFSIZE 256
 ```

 ## Building

 CMake:

 ```bash
 mkdir build && cd build
 cmake -DBOARD=raspberry_pi_pico ..
 cmake --build .
 ```

 Make:

 ```bash
 make BOARD=raspberry_pi_pico all
 ```

 ## How to use

 Plug any USB device into the board's USB host port. The debug UART prints the device's `ID vvvv:pppp`, serial number, and the decoded device descriptor (a hub lets you attach several devices, each printed in turn). Unplugging the device prints a removal message.
	# Host: Device Info

	A USB host example that enumerates any attached device and prints its descriptor information over the debug UART. No class drivers are enabled — only the hub driver, so it works with any kind of device.

	## What it does

	- On mount of any device, fetches and prints the full device descriptor: VID/PID, USB version, device class/subclass/protocol, max packet size, bcdDevice, and number of configurations.
	- Reads and prints the manufacturer, product, and serial-number string descriptors (UTF-16 to UTF-8), falling back to a placeholder serial when none is present.
	- Blinks the board LED, with a faster pattern while no device is mounted.
	- Builds on either the bare main loop or a FreeRTOS task, depending on `CFG_TUSB_OS`.

	## Requirements

	The board must support USB host mode (provide VBUS to the connected device); some boards need an external USB-A port / host adapter.

	## Configuration

	Notable `tusb_config.h` settings:

	```c
	#define CFG_TUH_ENABLED 1
	#define CFG_TUH_HUB 1
	#define CFG_TUH_DEVICE_MAX (3*CFG_TUH_HUB + 1)
	#define CFG_TUH_ENUMERATION_BUFSIZE 256
	```

	## Building

	CMake:

	```bash
	mkdir build && cd build
	cmake -DBOARD=raspberry_pi_pico ..
	cmake --build .
	```

	Make:

	```bash
	make BOARD=raspberry_pi_pico all
	```

	## How to use

	Plug any USB device into the board's USB host port. The debug UART prints the device's `ID vvvv:pppp`, serial number, and the decoded device descriptor (a hub lets you attach several devices, each printed in turn). Unplugging the device prints a removal message.