Kmdf Hid Minidriver For Touch I2c Device Calibration
KMDF HID Minidriver for Touch I2C Device is a kernel-mode driver framework (KMDF) solution used by Windows to enable communication between a touch screen and the system via the
Chosen: Upper filter on top of HIDI2C.sys — simpler because HID reports are already parsed. kmdf hid minidriver for touch i2c device calibration
For calibrating a touch I2C device using a KMDF HID Minidriver KMDF HID Minidriver for Touch I2C Device is
Introduction
X_cal = A * X_raw + B * Y_raw + C
Y_cal = D * X_raw + E * Y_raw + F
10. Sample Calibration Flow
- Boot: Driver loads, reads
HKLM\...\CalibrationMatrix.
- Device start: Sends I²C command to enable raw mode.
- Report interception: Every touch report is transformed.
- User-mode calibration tool sends IOCTL to driver to update matrix:
#define IOCTL_SET_CALIBRATION CTL_CODE(FILE_DEVICE_UNKNOWN, 0x800, METHOD_BUFFERED, FILE_ANY_ACCESS)
KMDF HID Minidriver for Touch I2C Device is a kernel-mode driver framework (KMDF) solution used by Windows to enable communication between a touch screen and the system via the
Chosen: Upper filter on top of HIDI2C.sys — simpler because HID reports are already parsed.
For calibrating a touch I2C device using a KMDF HID Minidriver
Introduction
X_cal = A * X_raw + B * Y_raw + C
Y_cal = D * X_raw + E * Y_raw + F
10. Sample Calibration Flow
- Boot: Driver loads, reads
HKLM\...\CalibrationMatrix.
- Device start: Sends I²C command to enable raw mode.
- Report interception: Every touch report is transformed.
- User-mode calibration tool sends IOCTL to driver to update matrix:
#define IOCTL_SET_CALIBRATION CTL_CODE(FILE_DEVICE_UNKNOWN, 0x800, METHOD_BUFFERED, FILE_ANY_ACCESS)