All Manuals > LispWorks® User Guide and Reference Manual > 44 The SERIAL-PORT Package

read-serial-port-char Function

Summary

Reads a character from a serial port.

Package

serial-port

Signature

read-serial-port-char serial-port &optional timeout-error-p timeout-char => char

Arguments
serial-port
A serial-port object.
timeout-error-p
A boolean.
timeout-char
A character.
Values
char
A character.
Description

The function read-serial-port-char reads and returns a character from the serial port associated with serial-port.

A timeout will occur if the character is not available before the read timeout (as specified by values given when the serial port was opened by open-serial-port).

When a timeout occurs, if timeout-error-p is non-nil, then an error of type serial-port-timeout is signaled, otherwise timeout-char is returned. The default value of timeout-error-p is t.

See also

read-serial-port-string


LispWorks® User Guide and Reference Manual - 01 Dec 2021 19:30:55