### SerialPortSample ###

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DESCRIPTION:

Command line tool that demonstrates how to use IOKitLib to find all serial ports

on OS X. Also shows how to open write to, read from, and close a serial port.

Testing:

To have this sample find a specific device, define the macro MATCH_PATH with the

value of the callout device path in /dev, such as:

#define MATCH_PATH "/dev/cu.usbmodemfa131"

If MATCH_PATH is undefined, the sample will attempt to connect to the first 

serial device it finds.

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BUILD REQUIREMENTS:

OS X 10.6 SDK or later

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RUNTIME REQUIREMENTS:

OS X 10.6 or later

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PACKING LIST:

SerialPortSample.c

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CHANGES FROM PREVIOUS VERSIONS:

Version 1.5

    Verified compatibility with recent Xcode and OS X versions. Fixed bug with 

    MIN and TIME settings.

Version 1.4

    Updated to produce a universal binary. Added examples of setting arbitrary

    baud rates and the read timer latency. Use kIOMasterPortDefault instead of

    older IOMasterPort function.

Version 1.3

    Techniques shown are:

    - Finding a serial port

    - Opening and configuring the port

    - Sending an "AT" command to a modem attached to the port

    - Reading the "OK" response from the modem (if any)

    - Closing the port