Asynchronous Communications
Possible Errors
• Communication Buffer Overflow
If
a read is attempted after the input buffer is
full, (i.e. LOF(f) returns 0).
• Device I/O Error
If
any of the following line conditions are
detected on reception: Overrun Error (OE),
Framing Error (FE), or Break Interrupt (BI).
The error is reset by subsequent inputs but the
character causing the error is lost.
• Device Fault
If
Data Set Ready (DSR) is lost during I/O.
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