Kmdf Hid Minidriver For Touch I2c Device Calibration Best May 2026

Define a HID Report Descriptor snippet:

0x06, 0x00, 0xFF,   // Usage Page (Vendor Defined)
0x09, 0x01,         // Usage (Calibration)
0x15, 0x00,         // Logical Minimum (0)
0x26, 0xFF, 0x00,   // Logical Maximum (255)
0x75, 0x08,         // Report Size (8 bits)
0x95, 0x08,         // Report Count (8 bytes)
0x82, 0x02, 0x01,   // Feature (Data,Var,Vol)

In your driver’s SetFeatureReport handler, parse the 8 bytes, validate, and store calibration. kmdf hid minidriver for touch i2c device calibration best

Best Practice: Do not require device reset during calibration update. Apply new parameters immediately to the next touch sample. Define a HID Report Descriptor snippet: 0x06, 0x00,

A touch controller (e.g., Goodix, Elan, Cypress) exposes registers: In your driver’s SetFeatureReport handler, parse the 8

Your KMDF driver must handle:

A HID Minidriver (also called a HID Transport Driver) sits below the class driver (HIDClass.sys). Its job is to communicate directly with the I²C controller, retrieve HID reports from the touch device, and forward them up the stack.

Touch Device (I2C) → KMDF HID Minidriver → HIDClass.sys → Touch Input Stack → User Mode