Kmdf Hid Minidriver For Touch I2c Device Calibration -

EVT_WDF_DEVICE_D0_ENTRY EvtDeviceD0Entry
 IsCalibrationMissing(calibrationBlob)) 
    WriteCalibrationToDevice(calibrationBlob);
    UpdateFirmwareSignature(storedSig);
// 5. Start HID report processing
WdfDeviceStopIdle(Device, FALSE);

[Version]
Signature="$WINDOWS NT$"
Class=HIDClass
ClassGuid=745a17a0-74d3-11d0-b6fe-00a0c90f57da
[MyTouchCalib.NT.HW]
AddReg=MyTouchCalib.AddReg
[MyTouchCalib.AddReg]
HKR,,"LowerFilters",0x00010000,"MyTouchCalib"
[MyTouchCalib.NT.Services]
AddService=MyTouchCalib,0x00000002,MyTouchCalib_Service kmdf hid minidriver for touch i2c device calibration
[MyTouchCalib_Service]
ServiceType=1
StartType=3
ErrorControl=1
ServiceBinary=%12%\MyTouchCalib.sys
LoadOrderGroup=HID Class

Your INF must declare the driver as a HID minidriver: Key KMDF objects and components

[MyDevice_Install.NT]
CopyFiles = MyDriver.Copy
AddReg   = MyDevice_AddReg
[MyDevice_AddReg]
HKR,,"UpperFilters",0x00010000,"HidUsb" ; For HID class
HKR,,"LowerFilters",0x00010000,"SpbCx" ; For I2C bus

Expose a vendor-defined HID Feature Report (Usage Page = 0xFF00, Usage = 0x0001) to allow calibration tools to: HID specifics

// User-mode application sends:
HidD_SetFeature(
    handle,
    reportBuffer,  // contains: command (READ_CALIBRATION) + offset + length
    bufferLength
);
// Driver's EvtHidSetFeatureReport:
A KMDF HID minidriver for I²C touch calibration provides robust, low-latency correction of touch coordinates without modifying user-space drivers. By intercepting IOCTL_HID_READ_REPORT and applying a transform matrix, it seamlessly integrates into Windows Touch stack. The presented design has been validated on multiple x86/ARM64 tablets with custom touch controllers, reducing touch offset error from ±2mm to <0.5mm after calibration.
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