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VOID TouchEvtInternalDeviceControl( _In_ WDFQUEUE Queue, _In_ WDFREQUEST Request, _In_ size_t OutputBufferLength, _In_ size_t InputBufferLength, _In_ ULONG IoControlCode ) WDFDEVICE device = WdfIoQueueGetDevice(Queue); NTSTATUS status = STATUS_SUCCESS; switch (IoControlCode) case IOCTL_HID_SET_FEATURE: PHID_XFER_PACKET packet = NULL; size_t bufferSize; status = WdfRequestRetrieveInputBuffer(Request, sizeof(HID_XFER_PACKET), (PVOID*)&packet, &bufferSize); if (NT_SUCCESS(status)) // Check if Report ID matches our Calibration Report ID (0x02) if (packet->reportId == 0x02 && packet->reportBufferLen > 0) BYTE command = packet->reportBuffer[1]; // Trigger internal calibration sequence based on command token status = ExecuteDeviceCalibrationSequence(device, command); break; default: status = STATUS_NOT_SUPPORTED; break; WdfRequestComplete(Request, status); Use code with caution. 4. Registry-Driven Calibration Configurations

The I2C bus is relatively slow (usually 400kHz or 1MHz). To get the best calibration response, your KMDF implementation must be lean: kmdf hid minidriver for touch i2c device calibration best