// User-mode application sends: HidD_SetFeature( handle, reportBuffer, // contains: command (READ_CALIBRATION) + offset + length bufferLength );
Modern touch controllers (e.g., from Goodix, Elan, Cypress) often communicate over I2C and comply with the HID-over-I2C protocol specification. While Windows provides the generic HIDI2C.sys driver, many touch controllers require (touch thresholds, mutual capacitance baseline, sensitivity matrices) to be loaded during device initialization. kmdf hid minidriver for touch i2c device calibration
DECLARE_CONST_UNICODE_STRING(i2cResource, L"I2C1"); WDF_IO_TARGET_OPEN_PARAMS openParams; WDFIOTARGET target; // Get the I2C controller object from the system NTSTATUS status = WdfDeviceGetDeviceStackIoType(Device, ...); status = WdfIoTargetCreate(Device, WDF_NO_OBJECT_ATTRIBUTES, &target); WDF_IO_TARGET_OPEN_PARAMS_INIT_OPEN_BY_NAME(&openParams, &i2cResource, FILE_ANY_ACCESS); status = WdfIoTargetOpen(target, &openParams); *IoTarget = target; return status; // User-mode application sends: HidD_SetFeature( handle