Getting back Decimal address value of a USB device?

Hello All,

I have a COM server application written in C#. When I run this application I get 2 type of addresses back for one usb device as follows:

USB0::2391::280::MY48220507::0::INSTR;
USB0::0x0957::0x0118::MY48220507::INSTR

I was hoping to get only either one of the addresses (decimal preferably)

The code is as follows:

public class Usb { ResourceManager rMgr = new ResourceManager(); FormattedIO488 src = new FormattedIO488(); object resources = null;  public string OutputResources() { resources = rMgr.FindRsrc("USB[0-9]*::?*"); string[] resource_list = (string[])resources; string allResources = String.Join(";", resource_list); return allResources;  } }

I find the resources using "USB[0-9]*::?*"

I tried using it as "USB[0-9]*::?*::?*::0::?*" and it gives back USB0::2391::280::MY48220507::0::INSTR;

But I am not sure if this is correct way to find resources.

Does the USB board number and the interface number changes every time?

Is there a better way to get back USB VISA address?

Thank you in advance!

Well, looking back at your previous post, the ResourceManager you're using here is part of a specialist USB library and so, without documentation, I don't know the format of the parameter to be passed to the FindRsrc method.

It looks a bit like a regular expression but it's not a standard one as I tried it on those address strings and it threw an exception.

If the addresses always follow that format, I would guess that the expression you tried using "USB[0-9]*::?*::?*::0::?*" will only return the decimal addresses as these appear to have a 0 before INSTR which the hex addresses don't have.

Failing that, if you could get an array of all these addresses, you could easily filter out the hex ones using LINQ code such as this:

string usb1 = "USB0::2391::280::MY48220507::0::INSTR;";

string usb2 = "USB0::0x0957::0x0118::MY48220507::INSTR";

string[] usba = {usb1, usb2};

string[] decAddrs = usba.Where(usb => !usb.Contains("0x")).ToArray();

foreach(string addr in decAddrs) Console.WriteLine(addr);

The output is just:

USB0::2391::280::MY48220507::0::INSTR;

The only other way I know of to get details of USB devices is to use WMI but the classes are not easy to use. Check out this script for example:

http://blogs.msdn.com/b/powershell/archive/2007/02/24/displaying-usb-devices-using-wmi.aspx?Redirected=true

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Vulpes12y ago
Accepted answer
Well, looking back at your previous post, the ResourceManager you're using here is part of a specialist USB library and so, without documentation, I don't know the format of the parameter to be passed to the FindRsrc method.

It looks a bit like a regular expression but it's not a standard one as I tried it on those address strings and it threw an exception.

If the addresses always follow that format, I would guess that the expression you tried using "USB[0-9]*::?*::?*::0::?*" will only return the decimal addresses as these appear to have a 0 before INSTR which the hex addresses don't have.

Failing that, if you could get an array of all these addresses, you could easily filter out the hex ones using LINQ code such as this:

string usb1 = "USB0::2391::280::MY48220507::0::INSTR;";
string usb2 = "USB0::0x0957::0x0118::MY48220507::INSTR";
string[] usba = {usb1, usb2};
string[] decAddrs = usba.Where(usb => !usb.Contains("0x")).ToArray();
foreach(string addr in decAddrs) Console.WriteLine(addr);

The output is just:

USB0::2391::280::MY48220507::0::INSTR;

The only other way I know of to get details of USB devices is to use WMI but the classes are not easy to use. Check out this script for example:

http://blogs.msdn.com/b/powershell/archive/2007/02/24/displaying-usb-devices-using-wmi.aspx?Redirected=true

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