BUG: RTS_CONTROL_TOGGLE Doesn't Cause RTS to Toggle (140030)
The information in this article applies to:
- Microsoft Platform Software Development Kit (SDK) 1.0, when used with:
- the operating system: Microsoft Windows 95
- the operating system: Microsoft Windows 98
- the operating system: Microsoft Windows Millennium Edition
This article was previously published under Q140030 SYMPTOMS
Setting the fRtsControl member of the DCB structure to RTS_CONTROL_TOGGLE
should cause the RTS line to go high when data is available for sending.
When no more bytes are available for transfer, the RTS line should be set
to low. In Windows 95, the RTS line stays high.
RESOLUTION
To work around this problem, use EscapeCommFunction to change the state of
the RTS line manually. Because the system doesn't do the RTS manipulation,
the application should implement the functionality itself. When data is
about to be sent, the application should set RTS high. When all of the data
has been sent, RTS should be set to low. This is only necessary when the
device being communicated with requires it. For more information, see the
Win32 documentation for help on EscapeCommFunction.
STATUS
Microsoft has confirmed this to be a bug in the Microsoft products listed
at the beginning of this article.
| Modification Type: | Minor | Last Reviewed: | 7/11/2005 |
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| Keywords: | kbAPI kbKernBase KB140030 |
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