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Top Forums Programming Wrong data with Read from a serial port. Post 302731761 by Corona688 on Thursday 15th of November 2012 06:43:21 PM
Old 11-15-2012
Have you checked the return value on those calls yet?

If you set up read timeouts on the serial device, read() will timeout by itself.
 

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XtAppAddTimeOut(3)						   XT FUNCTIONS 						XtAppAddTimeOut(3)

NAME
XtAppAddTimeOut, XtRemoveTimeOut - register and remove timeouts SYNTAX
XtIntervalId XtAppAddTimeOut(XtAppContext app_context, unsigned long interval, XtTimerCallbackProc proc, XtPointer client_data); void XtRemoveTimeOut(XtIntervalId timer); ARGUMENTS
app_context Specifies the application context for which the timer is to be set. client_data Specifies the argument that is to be passed to the specified procedure when . interval Specifies the time interval in milliseconds. proc Specifies the procedure that is to be called when time expires. timer Specifies the ID for the timeout request to be destroyed. DESCRIPTION
The XtAppAddTimeOut function creates a timeout and returns an identifier for it. The timeout value is set to interval. The callback pro- cedure is called when the time interval elapses, and then the timeout is removed. The XtRemoveTimeOut function removes the timeout. Note that timeouts are automatically removed once they trigger. SEE ALSO
XtAppAddInput(3),XtAppAddSignal(3) X Toolkit Intrinsics - C Language Interface Xlib - C Language X Interface X Version 11 libXt 1.1.3 XtAppAddTimeOut(3)
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