Although you probably have already done this if you're a Visual Basic. NET programmer, you want to make sure you have all of the packages you'll need. NET compiler, vbnc. This can be installed via another Mono package:. Next, you'll want to install the main Phidget Libraries. Compile and install them as explained on the main Linux page.
That Linux page also describes the different Phidget files, their installed locations, and their roles. When writing your code from scratch, you start it as you would any Visual Basic code on Linux, such as within a text editor like Emacs, Vi, Gedit, or Kate.
By following the instructions for your operating system and compiler above, you probably now have a working example and want to understand it better so you can change it to do what you want. This teaching section has resources for you to learn from the examples and write your own. Your main reference for writing Visual Basic.
NET code will be our. To learn the details behind opening, configuring, using, and closing your Phidget, try the General Phidget Programming page. That page also describes using the Phidget in an event-driven manner and in a traditional manner, both of which are available in. The Hello World example has this general structure so you can follow along. We also have an in-depth general introduction to writing Phidget code like open, read data, etc , as well as the.
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In Visual Basic. NET, you can name these event functions whatever you like, although you must catch the events by name in the "Handles" portion of the function declaration. The "Handles" portion of the function hooks them into the actual events when they occur. See our examples for details.
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In the example code, the event functions common to all Phidgets are called things like AttachHandler and DetachHandler , etc. Some event functions will be specific to each device, like when a tag is read on an RFID board, or when a sensor value changes on an Interface Kit. Other functions are given in the device-specific examples to show you more detail on using your Phidget. Creating a Phidget software object in Visual Basic.
NET is specific to the Phidget. For a Phidget Spatial, for example, this would involve creating a Spatial object. The examples show how to do this and other API functions. The object provides device specific methods and properties which are available from the API for your specific Phidget. Specific calls in Visual Basic VB. NET will differ in syntax from those on the General Phidget Programming page, but the concepts stay the same.
It may help to have the General Phidget Programming page and this section open at the same time, because they parallel each other and you can refer to the VB.
NET syntax. However, many additional concepts are covered on the General Phidget Programming page on a high level, such as using multiple Phidgets, handling errors, and different styles of programming. The open function opens the software object, but not hardware. So, it is not a guarantee you can use the Phidget immediately. The different types of open can be used with parameters to try and get the first device it can find, open based on its serial number, or even open across the network.
For example, if we were using an Interface Kit Phidget board as our device, the create and open calls would look like this:. To use the Phidget, it must be plugged in attached. We can handle this by using event driven programming and tracking the AttachEvents and DetachEvents, or we can handle this by calling waitForAttachment.
This function works for any Phidget.
WaitForAttachment will block indefinitely until a connection is made to the Phidget, or an optional timeout is exceeded. When combined in your initialization function with the initialization and open from above, the wait for attachment would look like this:. We recommend the use of event driven programming when working with Phidgets. In VB. NET we can hook an event handler into the event of a sensor changing on an Interface Kit board with the following code:. This is because it "Handles" the SensorChange event. Some events such as Attach and Detach belong to the base Phidget object and thus are common to all types of Phidgets.
Some values can be read and sent directly to the Phidget, simply use the instance members and properties. This is also how you would set properties on the Phidget such as the output state or sensor sensitivity. For example, obtaining the value of analog input sensor 0 on an Interface Kit board would be via:. At the end of your program, unhook any events and call Application.
This will make sure there are no outstanding events being processed before calling close. The General Phidget Programming page gives more information about:. The complete set of functions you have available for all Phidgets can be found in the. You can also find more description on any device-specific function in the Device API page for your specific Phidget, which can be found in its user guide.
ErrorEventHandler' and 'Phidgets. ErrorEventArgs' and 'Phidgets. The error is due to the System. IO and Phidgets. Events namespaces both having a class called ErrorEventHandler. To get around this issue, use the fully qualified namespace when referring to the ErrorEventHandler and ErrorEventArgs classes:. Views View View source History.
Tools What links here Printable version Page information. Software Drivers Drivers. Phidget SBC. Windows CE. Objective C. Code Troubleshooting. Operating System Troubleshooting. For example, using Visual Basic Express, you can create applications that:. To help make application development as easy as possible, Microsoft lets you download and use templates, also known as Start Kits, with Visual Basic Express.
Templates are used to create a particular type of Windows application.
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Visual Basic Express makes it easy for you to locate and download new starter kits. This displays a Search window that allows you to perform an online keyword search for new templates, which you can then download. Once downloaded, double-click on the starter-kit install package and follow the instructions provided to add it to Visual Basic Express. A template is a collection of base files, program code, property settings, and tasks that assists you in creating a particular type of Windows application.
Unlike other versions of Visual Basic, Visual Basic Express is limited to the development of Windows applications. Therefore, it cannot be used to create any of the following types of applications, whose development is supported by the full version of Visual Basic Microsoft packages Visual Basic as a standalone product that it calls a Standard Edition. The Standard Edition of Visual Basic is intended for the individual user. Companies that develop Visual Basic applications generally purchase Visual Basic as part of a package deal that Microsoft calls Visual Studio.