The driver must interface with the USB controller via the OS-specific I/O Request Packet (IRP) mechanism.

uint16_t crc16_ccitt(const uint8_t *data, size_t len) 
    uint16_t crc = 0xFFFF;
    for (size_t i = 0; i < len; ++i) 
        crc ^= (uint16_t)data[i] << 8;
        for (int j = 0; j < 8; ++j)
            crc = (crc & 0x8000) ? (crc << 1) ^ 0x1021 : crc << 1;
return crc;

Cause: Windows Update's automatic driver search. Fix: Disable automatic driver installation:

| ID | Severity | Description | Workaround | |----|----------|-------------|-------------| | FS-101 | High | Driver fails to load on Windows ARM64 (e.g., Surface Pro X) | Use x86 emulation or switch to Linux on ARM | | FS-105 | Medium | Occasional BSOD 0x9F (DRIVER_POWER_STATE_FAILURE) during system sleep | Disable USB selective suspend for the device | | FS-112 | Low | Linux kernel 6.2+ triggers "URB submission failed" error | Apply patch fs_sm100-6.2-compat.patch | | FS-120 | Critical | Two FS-SM100 units on same USB hub cause cross-talk | Use separate root hubs or powered hub with per-port switching |