IOCTL_SERIAL_SET_FIFO_CONTROL IOCTL (ntddser.h)
The IOCTL_SERIAL_SET_FIFO_CONTROL request sets the FIFO control register (FCR). Serial does not verify the specified FIFO control information.
Major code
Input buffer
The AssociatedIrp.SystemBuffer member points to a client-allocated ULONG that is used to input FIFO control information.
Input buffer length
The Parameters.DeviceIoControl.InputBufferLength is set to the size, in bytes, of a ULONG.
Output buffer
None.
Output buffer length
None.
Status block
The Information member is set to zero.
The Status member is set to one of the Generic Status Values for Serial Device Control Requests.
Requirements
| Requirement | Value |
|---|---|
| Header | ntddser.h (include Ntddser.h) |