// Custom report descriptor (example: 1-byte consumer control) static const uint8_t consumerDesc[] = 0x05, 0x0C, // Usage Page (Consumer) 0x09, 0x01, // Usage (Consumer Control) 0xA1, 0x01, // Collection (Application) 0x85, 0x01, // Report ID (1) 0x19, 0x00, // Usage Minimum (0) 0x2A, 0xFF, 0x02, // Usage Maximum (0x2FF) 0x15, 0x00, // Logical Minimum (0) 0x26, 0xFF, 0x02, // Logical Maximum (0x2FF) 0x95, 0x01, // Report Count (1) 0x75, 0x10, // Report Size (16 bits) 0x81, 0x00, // Input (Data,Array,Abs) 0xC0 // End Collection ;
Every HID contains a , which is essentially a "map" that tells the computer how to read the data packets. 3. Building Your Own HID hid device
Joysticks, gamepads, and steering wheels. The Ultimate Guide to HID Devices: Connecting Humans
The Ultimate Guide to HID Devices: Connecting Humans and Computers // Usage Page (Consumer) 0x09
: 3 buttons + X/Y relative movement.
When you plug in an HID device, it sends a "Report Descriptor" to the computer. This file tells the OS exactly what the device is (e.g., "I am a mouse with three buttons") and how the data is formatted.