I am porting mono app from Windows to Linux. The app communicates with external board. This board is visible as three virtual serial ports. Every plays a different role.
The app is automatically detecting those ports. Can I relay on the structure and information in the /sys/bus/usb/ ie are they the same in the different Linux distros?
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I am currently developing an application that connects to a device via USB but due to project modifications I have to move it to a target device whose only serial communication is via RS-232 DE-9 port.
To communicate with the device I use a proprietary API. Using strace I know that it scans all devices in /dev/bus/usb and after finding the right one the API connects to it.
I wanted to know if I could some how emulate my device in /dev/ttyS0 to an unused usb device in /dev/bus/usb/ to connect to it
How about running a linux application on windows platform without any OS virtualization.
Lets say we have an linux software installed on windows machine which can run successfully on windows with below mentioned approach:
A normal windows application runs on windows by creating a virtual address space on any Operating system. Program loader loads required libraries for the application from physical drive onto virtual memory address space. All those libraries related to application gets loaded when required by using File System APIs.
Now lets go in different way, instead of creating a virtual address space on local system, we can create a process address space on different machine which is capable to run the application. In our case, create address space for linux application on remote linux machine instead of local windows machine. All file system access can be grab on remote machine and transferred to local windows machine. In this way linux application located on local windows
machine, creates process address space on remote linux machine, access file system on local windows machine. All file system related apis can be remoted and routed to local machine. Linux application UI can be captured on linux machine and sent for display on local windows machine.
In this way different platform applications can be run on other platform as well without need of OS virtualization. What is your opinion on this approach and how much it is feasible. Is there any big fault in this approach which makes this approach non-feasible.
That little word- API that you have used there means translating the entire set of system-calls of an operating system to another. Calls that go into creating a socket connection or a directory to file locking etc, EVERYTHING changes. You've discussed just memory here, the GUI has it's own calls, so do drivers and networks.
By the end of 6 years, that little million-line of code that you would've written to achieve all this, when packaged and bundled, will be called; surprise, surprise- a hypervisor.
I have VMware workstation 9 and 10, and I am wanting to use that to run some integration tests.
Using the vmrun utility, I can copy scripts to and run them on the virtual machine guests. However, some of the integration tests will require interfacing with USB devices.
Is there any way using vmrun, or any of the vmware API's to programmatically control the "Removable Devices" to connect and disconnect USB devices to virtual machines?
I have tried looking at the readVariable and writeVariable commands, however I cannot find any useful information on that subject.
vmrun has no facility to passthrough USB devices from the host to the guest and vice versa (source, VMware employee). There are though 2 options to achieve this behavir
A) Use autoconnect: look here and here on how to modify the .VMX file to auto connect the USB device to the guest VM. Basically you need to add usb.autoConnect.device0 = "vid:XXXX pid:XXXX" to it.
B) Use askConnection: When you plugged in the device to the host, and the VM is powered on, you can select to connect the device to the VM and remember the choice. Then the next time when you pluggin the device again, the device will be automatically connected to the remembered VM. Also, you can configure in Edit > Preferences > USB for other choices. Currently, this feature only works when you plug in the device.
I'm trying to do mobile application development (BlackBerry, Android) on a virtual machine. My idea is that no matter what desktop I'm on I can open a remote connection to the virtual machine and have my mobile development environment ready. The problem is that I would like to deploy code to the mobile device as if it were physically connected to the virtual machine. Ideally the devices will be plugged in to the client machine that is creating the remote connection.
I'm currently using VMWare workstation to manage my virtual machines, I've done a bit of research to see what the best solution for connecting my usb devices over the network is.
There are a multitude of pricey USB over network solutions that may or may not work for what I'm trying, but I would like to avoid those. I would be interested in a free open source solution where both the usb host and usb client are windows machines. This is close to what I am looking for http://usbip.sourceforge.net/, but you can't host a device from Windows.
It appears that I may be able to do this with a Hyper-V VM and RemoteFX through Microsoft RDC, but I would like this to work on my existing VMWare VM.
The quickest solution I've found is a network usb hub that would allow me to connect the devices over the network, but this would force me to be attached to the hub which is a problem if more people come on my project.
Ideally I'm looking for an existing software solution to my problem. Any suggestions?
Also can anyone confirm this would work in Hyper-V using RemoteFX?
I would consider porting your VM over to VirtualBox from Sun (now Oracle) they have remote USB support out-of-the-box, and are very stable.
I've ported machines the other way (for work) and it's not difficult.
The rest of my team will make for my application a simple non-standard USB microphone, but until they finish it I will have to emulate it, for integration testing purposes.
Is there any risk in a physical loopback? Yes there is
Will a physical loopback work? Only with a USB bridge
There is any way to create a logical loopback? (MSDN has something about this)
There is any general purpose USB emulator software?
In case there is many options available I'd rather work it .NET/Matlab/Python solutions.
Edit: Proof of concept here
I strongly recommend this project, USB IP. It is a way of connecting USB devices over the network. There is a Windows client.
What this means is, you install the client on your Windows computer.
This device then expects to talk to a USB device connected to a Linux computer, the server:
What you now do, is either create a fake device driver for Linux, that looks like is connected to a physical USB device, but in reality is just logic pretending to be your USB device. There are tutorials for writing USB drivers for Linux. Or you create your own stub driver for the Device Control Manager (see picture above). This stub driver could run on Windows or Linux, it wouldn't matter. It could even run on the same Windows machine which is the USB client.
The DSF USB Loopback Device mentioned in the question itself, would be the same kind of solution as a stub driver for the Device Control Manager, but taking Linux out of the picture altogether.
You can write virtual USB device using QEMU.
You can duplicate already existing device, like the dev-serial.c found in this QEMU repository and change it for your needs.
After you write and compile your USB device you can simply attach it to your VM using the QEMU command line interface.