Touch I2c Device Calibration - Kmdf Hid Minidriver For

Storage formats

Pass the Windows Hardware Lab Kit tests specifically for:

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Implement read/write utilities using KMDF I²C target: kmdf hid minidriver for touch i2c device calibration

NTSTATUS I2CRead(WDFIOTARGET I2cTarget, UCHAR Register, PVOID Buffer, ULONG Length)
WDF_MEMORY_DESCRIPTOR wmdIn, wmdOut;
    WDFMEMORY memory;
    // Build I2C read transaction
    SPI_TRANSFER_DESCRIPTOR transferDesc[2];
    // ...
    return WdfIoTargetSendI2cTransactionSynchronously(...);

[HID Class Driver (hidclass.sys)]
        ↑
[TouchCalibMini.sys – our KMDF minidriver]
        ↑
[SPB I2C Controller Driver (SpbCx)]
        ↑
[I2C Hardware]

Modern touch controllers (e.g., Atmel, Cypress, Goodix) often connect via I²C and conform to the HID over I²C protocol specification. While Windows provides the inbox HIDI2C.sys driver, certain touch panels require custom calibration logic – storing per‑device offsets, sensitivity factors, or edge correction coefficients in non‑volatile memory (NVM) or the registry. A Kernel‑Mode Driver Framework (KMDF) HID minidriver allows you to:

This write‑up assumes you have:

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Your INF must declare the driver as a HID minidriver:

[MyDevice_Install.NT]
CopyFiles = MyDriver.Copy
AddReg   = MyDevice_AddReg
[MyDevice_AddReg]
HKR,,"UpperFilters",0x00010000,"HidUsb" ; For HID class
HKR,,"LowerFilters",0x00010000,"SpbCx" ; For I2C bus
 Storage formats Pass the Windows Hardware Lab Kit