Kmdf Hid Minidriver For Touch I2c Device Calibration Jun 2026

// Clamp to valid range (0–32767 for HID) calX = max(0, min(32767, calX)); calY = max(0, min(32767, calY));

// Apply calibration: e.g., adjust touch coordinates ApplyCalibrationToReport(reportData, reportLen); kmdf hid minidriver for touch i2c device calibration

| Limitation | Workaround | |------------|-------------| | No support for multi-touch reordering | Maintain per-contact tracking ID mapping | | Cannot add new contacts | Only modify existing ones | | Interference with Windows Update | Sign driver with WHQL, mark as critical | // Clamp to valid range (0–32767 for HID)

The handler validates input, updates driver’s calibration structure, saves to registry, and optionally applies it to the hardware. calY = max(0