Kmdf Hid Minidriver For Touch I2c Device Calibration -

// Define the HID report descriptor parsing function VOID HidReportDescriptorParse(WDFDEVICE device, PVOID reportDescriptor, ULONG reportDescriptorLength) // Parse the HID report descriptor HID_REPORT_DESCRIPTOR* hidReportDescriptor; hidReportDescriptor = (HID_REPORT_DESCRIPTOR*)reportDescriptor; // ...

Ycalibrated=D⋅Xraw+E⋅Yraw+Fcap Y sub c a l i b r a t e d end-sub equals cap D center dot cap X sub r a w end-sub plus cap E center dot cap Y sub r a w end-sub plus cap F handle scaling/gain. B, D handle rotation and skewing. C, F handle translational pixel offsets. Implementing Matrix Math in the I2C Read Routine kmdf hid minidriver for touch i2c device calibration

void EvtIoDeviceControl( WDFQUEUE Queue, WDFREQUEST Request, size_t OutputBufferLength, size_t InputBufferLength, ULONG IoControlCode) // Define the HID report descriptor parsing function