Using EasyHID with VBExpress 2005 (maybe .NET as well)

You can download Here a small code template to start using EasyHID DLL with VBExpress.

'Till now (june 5/2007) EasyHID don't generate the code template for VBExpress but VB5. I tested it a little bit here, and it seems to be reliable and bug free.

As we all know, David (Mecanique) have been kind enough to do this wonderful software & dll 100% free of charge. Knowing he's busy with something else, i think at least, we owe him a little hand with newer Microsoft Language platform.

This said, this would be nice to hear some comments from user here with this simple code template.

When i find some time, i'll do the VisualC Express template as well.

Thanks again David!

PS: the code template don't include any PIC code. Just VBExpress side. You could use the USBDemo one. The TextBox will show you the ADC results of AN0

Quote:

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Originally Posted by mister_e

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Thanks again David!
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Thanks again Steve!


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Thank you Steve and David.

The VB5/Express part was my hold up.

Thanks guys, don't forget to post your "It's working or not" comments...

As i write it, (~24 hours later) the template have been downloaded 76 times already :eek:

Finger crossed ;)

Hi,
Have been playing with this and it works great.

Only thing is that I can not get hidGetVendorName and hidGetProductName to work. I get an "Attempted to read or write protected memory" error with this and i'm not sure if im doing something wrong or that theres a problem with this .net version.

Thanks
Abnormal1

Yup, Yet another .NET thingy. 'Till now, i have found a way to make it work....

Code:

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  Public Sub OnPlugged(ByVal pHandle As Integer)
    Dim DeviceHandle As Integer
                              ' Mister E
    Dim VendorName As String = "        "
                              ' USB Demo
    Dim ProductName As String = "        "

    If hidGetVendorID(pHandle) = VendorID And hidGetProductID(pHandle) = ProductID Then ' Good one?
        '
        '  get the device handle
        '  =====================
        DeviceHandle = hidGetHandle(VendorID, ProductID)
        '
        '  Get the vendor and product name from the handle
        '  ===============================================
        hidGetVendorName(DeviceHandle, VendorName, 255)
        hidGetProductName(DeviceHandle, ProductName, 255)
        End If
    Label2.Text = VendorName
    label3.text = ProductName

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The trick is to assign a value to VendorName and ProductName before calling hidGetVendorName and hidGetProductName. Make sure your space/blank character are at least equal to the LEN if VendorName and ProductName. Unless, it will screw up things.

VB.NET doesn't seems to have a way to determine a fixed String size...

Anyways, i've ask the question on the MSDN forum, let's see if there's a more elegant way to do it. It has to... In meantime, the above solution work.

Thanks for that, it now works.

I expected it to be related to not using a fixed length string, however I had only tried to set the strings to Null rather than a load of spaces.

Anyway I have found that using the following is easier than counting how many time you press the spacebar

Code:

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Dim VendorName As String = New String(CChar(" "), 16)

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Also in the code you posted I don't think that you need to call "hidGetHandle" as you already have that in the variable "pHandle".

here's a way to assign a fixed format string in dotnet

[HTML]<VBFixedString(15)> Public VendorName As String[/HTML]

you still need to load with character it so far... don't forget the Imports Sytem

Guys over there send me few links. Load of thing to learn/try with this new .NET. (marshallxxx, exception.. syntax, InteropService.. etc etc etc). Especially when dealing with API :eek:

I've also found few nice .CHM and .PDF on VB.NET and Express... RTFM sessions will begin... when i'll wake up. <hr>

EOM

http://www.mister-e.org/Pics/GoodNight

Amr Bekhit has modified it a little bit and added some documentation as well

USB HID Template for Visual Basic 2005
http://www.helmpcb.com/Software/USBHIDVB/USBHIDVB.aspx

Hi i from argentina and my english is not very good...but i have a question ....anyone has try to use mcHID.dll (easy HID) in Visual C# ??
any help is welcome ;)

I have tried to write an application in c # but I have not worked :confused:

hello as they are, I could fix most errors in the program but were 5 not understand .... anyway I leave the program so that you take a look.


and finally the mistakes that I generated Visual C #

Code:

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Error        1        No se puede pasar '<this>' como argumento out o ref porque es de sólo lectura        C:\Documents and Settings\Flia. Moyano\Escritorio\Electrónica\easyHID c#\Form1.cs        32        37        easyHID_VB.net 2008
Error        2        'object' no contiene una definición de 'OnPlugged' ni se encontró ningún método de extensión 'OnPlugged' que acepte un primer argumento de tipo 'object' (¿falta una directiva de uso o una referencia de ensamblado?)        C:\Documents and Settings\Flia. Moyano\Escritorio\Electrónica\easyHID c#\Module1.cs        121        16        easyHID_VB.net 2008
Error        3        'object' no contiene una definición de 'OnUnplugged' ni se encontró ningún método de extensión 'OnUnplugged' que acepte un primer argumento de tipo 'object' (¿falta una directiva de uso o una referencia de ensamblado?)        C:\Documents and Settings\Flia. Moyano\Escritorio\Electrónica\easyHID c#\Module1.cs        125        16        easyHID_VB.net 2008
Error        4        'object' no contiene una definición de 'OnChanged' ni se encontró ningún método de extensión 'OnChanged' que acepte un primer argumento de tipo 'object' (¿falta una directiva de uso o una referencia de ensamblado?)        C:\Documents and Settings\Flia. Moyano\Escritorio\Electrónica\easyHID c#\Module1.cs        129        16        easyHID_VB.net 2008
Error        5        'object' no contiene una definición de 'OnRead' ni se encontró ningún método de extensión 'OnRead' que acepte un primer argumento de tipo 'object' (¿falta una directiva de uso o una referencia de ensamblado?)        C:\Documents and Settings\Flia. Moyano\Escritorio\Electrónica\easyHID c#\Module1.cs        133        16        easyHID_VB.net 2008

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