RE: Device Simulator for USB

Hi!

I'm trying to get a simulated USB device to work using a MFC application,
with no luck...

I have a simulated USB device in a COM dll, and I want to "plug it in" using
my MFC application. What a do have is a working modified VBScript from the
SoftUSBAudio sample (Test2.0HubWithAudio.wsf), but I don't want to do this
using a VBScript...

I've tried all different approaches, with no luck. The solution I would like
to use is something like this;

#import "progid:SOFTUSB.SoftUSBDevice" no_namespace, no_auto_exclude
#import "progid:SoftEHCI.SoftEHCI" no_namespace
#import "progid:MyDevice.MyDevice" no_namespace

...

ISoftEHCI *m_piEHCI;

HRESULT hr = ::CoCreateInstance(CLSID_SoftEHCI,
NULL,
CLSCTX_INPROC_SERVER,
__uuidof(ISoftEHCI),
reinterpret_cast<void**>(&m_piEHCI));

...

Best regards,
Stefan


"goldrake" wrote:

> I implemented a SoftUSBDevice as a COM client. It's
> part of an application. This "dialog box" device is self
> pluggable (plug/unplug) button. Communication is
> implemented by ISoftUSBEndpointEvents. A CSink class
> manages a single endpoint, vector<CSink*> collects all
> the endpoints' references for startup/cleanup purposes.
>
> The system is:
>
> Dev simulator <-> kmdf driver <-> Test App
>
> Up until now, the system worked correctly. I tested
> ReadFiles (... passed) and DeviceIoControls that
> provide data to the device (InBuffer). In this case
> the device receives the data carried by InBuffer.
> (... passed)
>
> On the other hand, DeviceIoControls which require the
> device to send data back (OutBuffer) have some issue.
> The DeviceIoControl doesn't fail but it always reports
> 0 bytes received. Useless to say that the buffer is not
> filled.
>
> I filter the vendor request issued by the driver in
> the EP0's OnDeviceRequest callback (Simulator). At
> this point i'm required to CoTaskMemAlloc the buffer
> that holds the data to be returned.
>
> the following should let me enqueue the data:
>
> *ppbResponseData = (BYTE *)pbData;
> *pcbResponseData = 4;
> *pbSetupStatus = USB_ACK;
> *RequestHandle = 45; // for testing OnDeviceRequestComplete
>
> OnDeviceRequestComplete is also fired and handles me back 45.
> Not much to do here just a test and let
> *pbFinalRequestStatus = USB_ACK again.
>
> *************************
> * So the transaction is complete
> * but my DeviceIoControl
> * never sees any data !!!
> *************************
>
> I also hooked the OnSetupTransfer event. It seems to give
> me the right request "C0 B0 00 00 00 00 04 00".
>
> ( This should be fired before OnDeviceRequest
> is fired. But i notice that
>
> - if i hook OnSetupTransfer
> - let *pbStatus = USB_ACK;
> - and return S_OK;
>
> the driver and the app hang until i unplug the device
> and OnDeviceRequest is not called )
>
> There are not many details about it in the doc and
> if you GoogleFor("ISoftUSBDevice") you would be feeling
> luckier than me if you could find more than three links.
>
> Any clue?
>
>
>
>

Thanks for your answer!

So i only need to import DSF.DSF and MyDevice.MyDevice?

#import "progidSF.DSF"
#import "progid:MobileStation.MobileStationDevice"

When I try to do this and try to do anything with e.g. MyDevice.MyDevice i
get "error C2653: 'MyDevice' : is not a class or namespace name" and "error
C2065: 'IMyDevice' : undeclared identifier"

I can't even instantiate object with e.g. "MyDevice::IMyDevice* pMyDevice;"

I think I'm missing something really fundamental... do you have any example
you could share, on how to get this to work in C++? All I have is this
VBScript, and I don't know anything about VBScripts...

Best regards

"goldrake" wrote:

> I guess #import and CoCreateInstance are an "either... or".
> What #import does is creating wrapper classes around the
> objects you specify (smart pointers). CoCreateInstance, on
> the other hand, lets you access to COM interfaces directly.
> Anyway, you don't have to interface to ISoftEHCI. You
> have to create an instance of the SoftUSBDevice that's in
> you COM dll (simulator). You also need to create an instance
> of DSF (framework) It is up to the framework to hot-plug
> your "DSFDevice"
>

Again, sorry for the spam!

The example code i'm using should of course read

....

#import "progidSF.DSF"
#import "progid:MyDevice.MyDevice"

....

Sorry, that should read

....

#import "progidSF.DSF"
#import "progid:MobileStation.MobileStationDevice"

....

Hi again!

I'm getting really frustrated...

I think I've sorted out the #import/COM stuff, but how do I use it? I'm
trying to "copy" the test scripts from the samples, that comes with the
DSF-runtime, with no luck (e.g. Test2.0HubWithAudio.wsf).

The scripts I'm using as reference has a lot of ".Object(...)",
"EnumerateDevices" and other stuff in it, but I can't get it to work...

Do you have any sample/pseudo code to get the device plugged in? I have
installed the simulated host controller, but that's about it... I'm having
a really hard time getting my head around the the other stuff!