Kmdf Hid Minidriver For Touch I2c Device Calibration: Best Fixed

On reboot, EvtDevicePrepareHardware reads this property. If present, your driver sends a Feature Report to the I2C device to inject these coefficients before touch reporting starts.

model where a minimal WDM driver handles the HID registration and forwards requests to your KMDF filter. Microsoft Learn Architecture & Calibration Best Practices kmdf hid minidriver for touch i2c device calibration best

Never send raw ADC values to Windows. The OS expects HID Units in micrometers or logical coordinates. On reboot, EvtDevicePrepareHardware reads this property