Software Overview: Difference between revisions

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== Language Support ==
== Language Support ==


Phidgets have libraries to support [[Phidget Programming#Event Driven Code | Event Driven Code]] in the following languages:
Phidgets can be programmed either by an '''event-driven''' model, or by traditional '''linear code'''.  All languages below support linear code.  Some languages support our complete API, which includes support for event-driven design.
 
If you are flexible on what language you can use, we suggest choosing a language which supports event-driven code.
 
Phidgets have libraries to support [[#Event Driven Code|Event Driven Code]] in the following languages:


* [[Language - C/C++]]
* [[Language - C/C++]]
* ...
* ...


Phidgets have libraries to support [[Linear Code]] in the following languages:
Phidgets have libraries to support only [[#Linear Code|Linear Code]] in the following languages:


* [[Language - MATLAB]]
* [[Language - MATLAB]]
* ...
* ...
== Different Code Styles ==
User and device actions can be handled by either:
*Letting the program tell you when they happen and then doing something (event driven code)
*Waiting for them on your own and then and then doing something (linear code)
These styles can mix.  For example, you can take a defined set of steps at first such as turning on an LED or antenna (linear code) and then doing nothing until an output change event is fired (event code).
With languages that support both styles, you can mix and match.  For languages that support only linear code (see the [[#Language Support|Language Support Categories]] above) you can only use the linear style.
Examples in pseudo-code are given below for each style type so you can see how your language choice can affect your code design.
=== Event Driven Code ===
Event driven code
// --- Event Functions ---
Create any Language-Specific Functions
Create General Attach, Detach, and Error Handling Functions
    On attach: Initialize hardware (antennas, etc)
    On detach: Reset any state variables
Create Hardware-Specific Functions
    Print messages to notify they are called
    Perform minor accompanying changes (turn on LED, etc)
// --- Main Code ---
Create Device Software Object
Attach Event Functions created above to Device
Open Device
Loop waiting for events and user input:
Get and Print various device statuses on request by input
    Handle on-going attach and detach events
    Exit upon specific user input
Close Device
Delete Device
=== Linear Code ===
Linear code

Revision as of 14:50, 2 November 2011

Operating System Support

Phidgets can run directly on these operating systems:

Phidgets can be driven remotely by these operating systems:

Language Support

Phidgets can be programmed either by an event-driven model, or by traditional linear code. All languages below support linear code. Some languages support our complete API, which includes support for event-driven design.

If you are flexible on what language you can use, we suggest choosing a language which supports event-driven code.

Phidgets have libraries to support Event Driven Code in the following languages:

Phidgets have libraries to support only Linear Code in the following languages:

Different Code Styles

User and device actions can be handled by either:

  • Letting the program tell you when they happen and then doing something (event driven code)
  • Waiting for them on your own and then and then doing something (linear code)

These styles can mix. For example, you can take a defined set of steps at first such as turning on an LED or antenna (linear code) and then doing nothing until an output change event is fired (event code).

With languages that support both styles, you can mix and match. For languages that support only linear code (see the Language Support Categories above) you can only use the linear style.

Examples in pseudo-code are given below for each style type so you can see how your language choice can affect your code design.

Event Driven Code

Event driven code

// --- Event Functions ---

Create any Language-Specific Functions

Create General Attach, Detach, and Error Handling Functions

   On attach: Initialize hardware (antennas, etc)
   On detach: Reset any state variables

Create Hardware-Specific Functions

   Print messages to notify they are called
   Perform minor accompanying changes (turn on LED, etc)

// --- Main Code ---

Create Device Software Object Attach Event Functions created above to Device Open Device

Loop waiting for events and user input: Get and Print various device statuses on request by input

   Handle on-going attach and detach events
   Exit upon specific user input

Close Device Delete Device


Linear Code

Linear code