Developing a HID Driver for QNX

A Human Interface Device (HID) is a type of computer device used for human interaction, like keyboards, mice, and game controllers. It's a device class that allows computers to receive input from humans and transmit output to them. HIDs are often connected via USB and use a standard protocol (USB HID) that simplifies installation and driver development. Additionally, it's important to note that HID consists of two fundamental concepts, a report descriptor, and reports. Reports are the actual data that is exchanged between a device and a software client. The report descriptor describes the format and meaning the data that the device supports. This section provides a step-by-step guide to writing a HID driver with the help of the hid-input-demo sample driver. This sample driver can be used to interact with USB HID-compliant gamepads and joysticks on a system running QNX.