ASYNC SETBREAKOFF: Difference between revisions
m Ak120 moved page ASYNC SETBREAKOFF (45h) to ASYNC SETBREAKOFF |
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This function sets the break off. | {{DISPLAYTITLE:ASYNC_SETBREAKOFF}} | ||
; Category:IOCTL_ASYNC (01h) | This function sets the break off. | ||
; Function:ASYNC_SETBREAKOFF (45h) | ;Category:IOCTL_ASYNC (01h) | ||
;Function:ASYNC_SETBREAKOFF (45h) | |||
==Parameter Packet Format== | ==Parameter Packet Format== | ||
None. Packet pointer must be NULL. | None. Packet pointer must be NULL. | ||
==Data Packet Format== | ==Data Packet Format== | ||
{|class="wikitable" | |||
!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. | |||
;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== | ==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. | 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== | ==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. | 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. | ||
[[Category:IOCtl | [[Category:IOCtl Function]] | ||
Latest revision as of 18:57, 22 October 2021
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.