ASYNC_SETBREAKOFF
This function sets the break off.
- Category
- IOCTL_ASYNC (01h)
- Function
- ASYNC_SETBREAKOFF (45h)
Parameter Packet Format
None. Packet pointer must be NULL.
Data Packet Format
| Field | Length | C Datatype |
|---|---|---|
| COM Error WORD (COMERR) | WORD | USHORT |
- COM Error WORD (COMERR)
- The physical device driver returns this information if a general failure error is not reported. See "Function 6Dh - Query COM Error" for COMERR definition. The COM device error information is not cleared by this action.
Returns
If the call is made with an invalid Parameter Packet pointer and a general failure error is reported, this function is not performed and valid information is not returned in the Data Packet.
Remarks
If a general failure is not returned, then the physical device driver stops generating a break signal. It is not considered an error if the physical device driver is not generating a break signal. The physical device driver then resumes transmitting characters, taking into account all the other reasons why characters might be transmitted.