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Fedora 18 Compile Moxa Beta Device Driver


Down below is a guide for Ubuntu Linux.  Here is the same thing for Fedora Linux.

The serial interface device drivers on the Moxa web site may not work with the latest Linux kernels.

Send an email message to "support at moxa dot com" and ask for a Beta device driver for Linux for your Moxa device model number.  You should get an answer within a few hours.

First update the system

# yum update

or use yum extender GUI.

The above will typically install about 50 to 100 Megabytes of updates and will take a while.

Install the software development tools

# yum install kernel-headers
# yum groupinstall "Development Tools" "Development Libraries"

Make a directory to work in

$ cd
$ mkdir Moxa-Beta
$ cd Moxa-Beta

Save the tar ball there and untar it:
$ tar -zxvf driv_linux_uport_v1.2.5_build_13040314.tgz
$ cd mxuport

Make the driver

$ make driver_make

...and you should see this scary message:
************************************************************************
Fedora release 18 (Spherical Cow) 3.8.1-201.fc18.x86_64
MOXA UPort 1200/1400/1600 series driver ver 1.2.5
Release Date: 2013/04/03
************************************************************************
**********************************WARNING*******************************
MOXA UPort 1200/1400/1600 series driver may not be compatible with
Linux kernel versions newer than 3.7.10 .
To download the latest driver, please visit Moxa at: http://www.moxa.com
If you have questions, please contact Moxa support at: support at moxa dot com
************************************************************************

Install the driver

If and only if there are no errors above, set user to root and:
# make install

...and you should see this scary message:
************************************************************************
Fedora release 18 (Spherical Cow) 3.8.1-201.fc18.x86_64
MOXA UPort 1200/1400/1600 series driver ver 1.2.5
Release Date: 2013/04/03
************************************************************************
**********************************WARNING*******************************
MOXA UPort 1200/1400/1600 series driver may not be compatible with
Linux kernel versions newer than 3.7.10 .
To download the latest driver, please visit Moxa at: http://www.moxa.com
If you have questions, please contact Moxa support at: support at moxa dot com
************************************************************************

************************************************************************
MOXA UPort 1200/1400/1600 series driver ver 1.2.5 installed successfully.
************************************************************************

Plug it in and set it up

Now, when you plug the Moxa U1250 in, it should show up in /dev as ttyMXUSB0 and ttyMXUSB1.

Configure the device for RS232:
# setserial /dev/ttyMXUSB0 port 0x0

or for RS422:
# setserial /dev/ttyMXUSB0 port 0x2

and for RS485 2-wire:
# setserial /dev/ttyMXUSB0 port 0x1

It is all explained in the readme.txt file and I recommend you use it with Cutecom.

Problems with Low Latency extensions

I compiled the above on a virtual machine and it all went swimmingly.  However, when I tried to compile it on a real machine which has a real serial port, it failed due to a missing 'low-latency' record in 'struct tty_struct' in file mx-uport.c

 Eventually, I fixed it by commenting out the offending flag operations in lines 1565, 1567, 2956 and 408.  However, I am not sure whether it works yet.  It now compiles, but I have not had time to test it.
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