Difference between revisions of "ASYNC SETBREAKOFF (45h)"
(Created page with "This function sets the break off. ; Category:IOCTL_ASYNC (01h) ; Function:ASYNC_SETBREAKOFF (45h) ==Parameter Packet Format== None. Packet pointer must be NULL. ==Data Pa...")
Revision as of 21:41, 26 March 2020
This function sets the break off.
- IOCTL_ASYNC (01h)
- 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 │ └───────────────────────────────────────────────────┘
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.
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.