In your EvtDevicePrepareHardware callback, read the calibration values from the : Use WdfDeviceOpenRegistryKey . Fetch values like XOffset , YGain , or Orientation .
What are you using (e.g., Goodix, Synaptics, FocalTech)?
User Mode | Touch Panel App / Calibration Tool -------------------|-------------------------------------- Kernel Mode | HID Accessory Services (HIDClass.sys) | ↑ | KMDF HID Minidriver (YourDriver.sys) | ↑ | HIDI2C.sys (Generic Transport) | ↑ -------------------|-------------------------------------- Hardware | I2C Touch Controller kmdf hid minidriver for touch i2c device calibration
HKLM\SYSTEM\CurrentControlSet\Enum\ACPI\VEN_EXTC&DEV_0001\ \Device Parameters Key DWORD properties include:
Many calibration or "frozen" touch issues are caused by the system turning off the I2C controller to save power. Device Manager System devices , right-click Intel Serial IO I2C Host Controller (or similar), and select Properties Power Management tab, uncheck "Allow the computer to turn off this device to save power" Developer & Advanced Information User Mode | Touch Panel App / Calibration
Electromagnetic interference (EMI) from internal power supplies, processors, or wireless chips that warps the capacitive field.
: These drivers are often tied to specific ACPI Hardware IDs , such as ACPI\MSSL1680 or ACPI\PNP1680 , commonly used by Silead touch controllers. The Calibration Problem The Calibration Problem // Construct SPB request //
// Construct SPB request // Send read command to I²C device // Handle ACK/NACK conditions
Run the Digitizer WinPTPCfg Test and Touch Validity Test to confirm your minidriver aligns perfectly with Microsoft’s standard requirements.
If you are developing or debugging a specific touch hardware platform, let me know the you are working with or any specific driver error codes you are encountering to tailer the next steps. Share public link