Calibration parameters must persist across system reboots. The KMDF driver can:

: If the driver fails to load the new calibration, a "Disable/Enable" cycle in Device Manager can force a re-initialization of the device extension and registry values.

Set up a fixed-point multiplication matrix helper function within the data parsing loop.

: Rotation and skew coefficients (typically zero unless the sensor is physically rotated relative to the display grid). : Translational translation offsets ( Code Implementation: Coordinate Translation

Use WDFWAITLOCK primitives to secure coordinate parameters during cross-thread runtime updates. This prevents raw data worker tasks from reading half-written matrix structures. Next Steps for Implementation:

Apply the transformation matrix within the data parsing loop. Execute this logic prior to wrapping coordinates into a HID report packet.

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