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Active1 year, 5 months ago
My host machine's running Ubuntu with Windows XP guest via Virtualbox. My Ubuntu host have one serial port(/dev/ttyS0), and now I want to use hyperterminal inside XP guest to send & recieve data via serial port(COM0) to my Ubuntu host. On the Ubuntu host I use pyserial to read & write data to XP guest. How to setup Virtualbox for this case? Apr 07, 2014 1. Settings in VirtualBox. In the settings page, Check “Enable Serial Port”, set “Port Number” to “COM1”. This is the port number in the guest. If the guest is a Linux, COM1 is shown as /dev/ttyS0, and COM2 is shown as /dev/ttyS1. Set “Port Mode” to “Host Pipe”, check “Create Pipe” and set “Port/File Path” to “/tmp/vbox”.
I am running a certain application on Ubuntu (16.04) in VirtualBox, while VirtualBox is running on Windows 10 (host).
Virtual Port Windows 10
In Simulink (running on my host), I have a simulation where at the last stage, I gather some values. I want to output these values over a serial connection at a certain baud rate to the application that is running on VirtualBox (i.e. QGroundControl station).
So first part of my question - VirtualBox:
In VirtualBox, I enabled the serial port and chose a host pipe in port mode, as shown in:
In the picture you can see that COM6 is used, but I used COM1 and COM2 instead. I got the same result for both.
I am not that used to working with VirtualBox, so I don't really know if this means I have now created a connection between my host and guest or if I still need to activate or connect them in any way?
Second part of my question - Simulink:
In Simulink, I want to output my values using a serial send (because I think that is the easiest way? If there is a better way, please tell me), but if I want to select a port, no ports are shown, as you can see in:
What do I need to do/change in VirtualBox/Simulink to get my COM port to show up?
Last part - MATLAB:
Because in Simulink, no COM ports were shown. I wanted to check for available ports in MATLAB, but apparently all my ports are closed:
If I try to open one of my ports by using the fopen()-command, I get this message:
Error using serial/fopen
Open failed: Port: COM1 is not available. No ports are available.
Use INSTRFIND to determine if other instrument objects are connected to the requested device.
Using 'INSTRFIND' shows that all ports are closed.
Peter MortensenOpen failed: Port: COM1 is not available. No ports are available.
Use INSTRFIND to determine if other instrument objects are connected to the requested device.
Using 'INSTRFIND' shows that all ports are closed.
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LisLis
1 Answer
First of all, VirtualBox won't create a serial port for your host. So you have to create two virtual COM ports on the host using some other software and bridge these two ports virtually. Then use one port to connect to Simulink and other must be setup in such a way that VM COM port uses this port.
For creating a virtual COM port on Windows I will be using
com0com
fromFaking an RS232 Serial Port. You can use any software you like.After installing com0com, open
setuppg.exe
from C:Program Files (x86)com0com
.Now click apply. Now you will have
COM9
and COM10
bridged (it's like COM9
and COM10
are internally connected).Next we need to connect
COM9 port in Host
to COM1 port in Guest OS
for that open Oracle VM VirtualBox Manager
and open the settings of your required virtual machine. Now, select Serial Ports and setup like shown below and click OK.NOTE: Windows provides legacy names only for COM ports 1 through to 9. For all other COM ports you must use the full device naming convention under Windows. So if you decide to use
COM10
instead of COM9
, using COM10
at Path/Address
won't work. Instead you have to use .COM10
.Now start your virtual machine, and your ports are ready. Now ports will be shown in Simulink and connect to
COM10
in this scenario and in the virtual machine, connect your QGroundControl station
to COM1
.Simulink <--> COM10 (Host)
COM10 (Host) <--> COM9 (Host) >> Connected using com0com
COM9 (Host) <--> COM1 (Guest) >> Connected by Oracle VM VirtualBox
COM1 (Guest) <--> QGroundControl station
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Active6 years ago
My host machine's running Ubuntu with Windows XP guest via Virtualbox.
My Ubuntu host have one serial port(/dev/ttyS0), and now I want to use hyperterminal inside XP guest to send & recieve data via serial port(COM0) to my Ubuntu host
On the Ubuntu host I use pyserial to read & write data to XP guest.
How to setup Virtualbox for this case?
Thanks!
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billyducVirtualbox Serial Port Setup Free
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1 Answer
I think you are using the same serial port on your host and guest OS's.If yes, you can't.
Or you bind the guest OS serial port to the real serial port and use another serial port on your host (connected by a null modem cable), or you have to use sockets on the host. This socket is created by VirtualBox ( http://www.virtualbox.org/manual/ch03.html#serialports):
On a Mac, Linux or Solaris host, a local domain socket is used instead. The socket filename must be chosen such that the user running VirtualBox has sufficient privileges to create and write to it. The /tmp directory is often a good candidate.
On Linux there are various tools which can connect to a local domain socket or create one in server mode. The most flexible tool is socat and is available as part of many distributions.
In this case, for on the Linux host, you won't be able to use PySerial.But on the guest OS, PySerial will work fine, as to the guest OS the virtual serial port will look like a real one.
Virtualbox Serial Port Setup Linux Guest
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