# USB HID Keyboard Example

## Overview

This sample demonstrates three ways to read events from a HID keyboard device.

Source file:

```bash
src/rtsmart/examples/peripheral/usb_hid_kbd/test_hid.c
```

## Sample Behavior

- default device node: `/dev/hidk0`
- blocking read
- non-blocking read and `EAGAIN` handling
- `poll()`-based notification
- prints common key names and press/release state

## Runtime Parameters

```bash
./test_hid [dev_path]
```

## Build and Run

```bash
cd src/rtsmart/examples/peripheral/usb_hid_kbd
make
./test_hid [dev_path]
```

If `dev_path` is omitted, the sample uses `/dev/hidk0`.