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Notice: This page contains information for the legacy Phidget21 Library. Phidget21 does not support VINT Phidgets, and will not support any new Phidgets. Phidget21 will be maintained until 2020. We recommend that new projects be developed against the Phidget22 Library.


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OS - OS X

From Phidgets Legacy Support
Revision as of 16:17, 10 April 2012 by Mphi (Talk | contribs) (Installing)

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Icon-Mac-OS.png On OS X, Phidgets can be either plugged directly into a USB Port or run over a network using the Webservice.

Phidgets are designed to run on OS X 10.4 or newer, and can run on PPC, 32-bit, and 64-bit systems.

Getting Started (Libraries and Drivers)

If this is your first Phidget, we highly recommend working through the Getting Started guide for your specific Phidget device. If you already have the Preference Pane Installed and know how to use it, then you've already followed the guide and are ready to learn more about the workings behind the Preference Pane, the Phidget Webservice, and more - all specific to OS X.

If you are already a pro, and just want the drivers:

For special cases where you want to install the Phidget libraries without the installer, please see the Advanced Uses section.

Installing

The Phidget installer will isstall the core Phidget files onto your system.

To install the libraries, follow these steps:

1. Download the Phidget installer for your system

2. Open up the installer, and double click on Phidgets.mpkg to install the libraries.

OS X Install

3. Proceed through the wizard.

OS X Install

4. Once the installation is complete, you are ready to program with Phidgets.

Proceed onto to the next section where the Phidget Preference Pane will be discussed.

Phidget Preference Pane

The Phidget Preference Pane is a tool to quickly determine whether your system is able to control Phidgets, and also act as a debugging tool.

Once the Phidget libraries are installed using the installer, open up the System Preferences window.

OS X System Preferences

Click on the Phidgets icon in the Other section to bring up the Phidgets Preference Pane.

OS X PreferencePane General

The general tab shows the list of Phidgets currently physically attached to the computer. You can also view the currently installed Phidget library version. You can double click on a Phidget device to open up an example program for the device.

OS X PreferencePane Example

In the above screenshot, the RFID example was opened. These examples are intended for demonstration and debugging purposes. If you have not yet already, please see the Getting Started guide for your device. It is important to keep in mind that when an example Phidget application is opened from the Phidget Preference Pane, it holds a lock on the Phidget. This prevents any other program from accessing the Phidget. Please ensure that this example application is closed(the Phidget Preference Pane can still be running) when you are running your own applications. 

The next tab is the Web Service tab, which allows you to control Phidgets over a network.

OS X PreferencePane Webservice Stopped

Here, you can start and stop the Webservice. Details are provided in the Webservice section. You can also determine whether the Phidget Webservice is currently running.

The next tab is the Labels tab. In this section, you can view the currently assigned labels of any Phidget attached to your computer. It is also possible to set the labels of Phidgets here too.

OS X PreferencePane Webservice Labels Local

You can also view the labels of any Phidget connected through the Webservice

OS X PreferencePane Webservice Labels Remote

The Bonjour tab gives a list of all currently attached Phidgets that are connected to the Webservice. You can also double click on the Phidget to connect to it over the network using one or more computers, and still use the Phidget on the computer it is directly connected to.

OS X PreferencePane Bonjour

The last tab is the PhidgetSBC tab, which displays the complete list of PhidgetSBCs connected to the network. You can double click on the PhidgetSBC to bring up the PhidgetSBC Adminstration Console.

OS X PreferencePane PhidgetSBC

Checking

To confirm the libraries were installed and work correctly, you can check both the hardware and software sides of the interface. It is worth checking the software side first, because if it works then you know the hardware side is also okay.

Software

If you have the Phidgets library installed on your system, you can verify that the software side is working by seeing if the Phidget device is listed in the General tab of the Phidget Preference Pane.

OS X Preference Pane General

The above screenshot shows that a PhidgetRFID and a PhidgetInterfaceKit are attached to the computer. If the Phidget is plugged into a USB port and you are not able to see that the Phidget is in the list, there may be a hardware issue. Please see the hardware section for more details.

Hardware

You can verify that your computer detects that the Phidget is plugged in through a USB connection by going to the OS X System Profiler. You can access the System Profiler by selecting About This Mac under the Apple icon.

OS X About This Mac

The new window will open up.

OS X More Info

Select More Info. The System Profiler will show up. In the USB section, you will be able to find all connected USB devices.

OS X Attached USB Devices

In the above screenshot, The PhidgetInterfaceKit and PhidgetRFID are connected to the USB ports.

If you don't see the the Phidget in the list, then take a look at the troubleshooting section below, as well as the Communications section of our general troubleshooting page.

Troubleshooting

If the examples do not work but USB does work (i.e. your computer can consistently see the device in the hardware), take a moment to check the basics:

  • You are using OS X 10.4 or newer.
  • No other programs, drivers, or processes are using that USB port in software
  • The Phidget libraries are the latest version (visit the getting started section to download them)
  • Check the common problems section below, some specific combinations can cause problems

If your problem doesn't seem to be fixed by these steps, make sure that the Phidget is seen consistently by USB (if it is erratic, try our general troubleshooting guide). If you are still having problems after using the troubleshooting guide, please ask us!

Programming Languages

We recommend the following languages for OS X:

You can also use these languages, but they do not support event driven code, and must use logic code only:

Webservice

The Phidget Webservice allows you to remotely control a Phidget over a network.

Drivers for the Phidget Webservice on OS X are already included in the Drivers above. If you see the Phidget Preference Pane in System Preferences, then you already have the Webservice drivers installed.

You can connect to a Phidget hosted on another computer if you know the IP address of the host computer. Phidgets optionally supports the use of mDNS, which allows Phidgets to be found and opened on the network by a server id instead of an IP address and port. When using a server id, both the client and server will need to be running an implementation of zero configuration networking. The Phidget Webservice takes advantage of the Bonjour software. It is a tool, developed by Apple to locate devices such as Phidgets, and printers. It allows you to connect to a Phidget over the Webservice while specifying the server id. Alternatively, an IP address and port can be supplied to connect to a Phidget over the Webservice.

This section helps you install, check, and use the Webservice on Windows, but we also have an overview of the Phidget Webservice in general.

Turning the Webservice On and Off

There are two methods that can be used to turn the Webservice on and off. The first method is through the Phidget Preference Pane. In the Webservice tab, you can start or stop the Webservice. You can also choose to have the Webservice start up automatically upon system boot up by selecting the Start Automatically checkbox.

OS X PreferencePane WebService

The second method of turning the Webservice on and off is through command line. If you used our installer, the Webservice utility is automatically installed in /usr/bin/phidget21webservice.

You can get command line help with phidgetwebservice21 using the -h option:

 phidgetwebservice21 -h
'phidgetwebservice21' is a Phidget and Dictionary server from Phidgets Inc. See www.phidgets.com for more information.
Usage: phidgetwebservice21 [OPTION]
All parameters are optional. The default parameters are: port=5001, ServerName=(Computer Name) and no password

Options:
  -p      Port
  -n      Server Name
  -P      Password
  -v      Debug mode
  -h      Display this help

To find the defaults used by phidget21webservice, the command line is the fastest way to learn the default server name and IP address of your computer:

  • For the default server name, use hostname on the command line.
  • For your IP address, use ifconfig -a on the command line.
    • A line in the return text, under your main internet connection (usually eth0) will say something like inet addr:192.168.3.178, which is your IP.

Here are some example usage.

To start the Webservice with default parameters:

 phidgetwebservice21

To start the Webservice with a server name of myServer:

 phidgetwebservice21-n myServer

To stop the Webservice, simply close the command line window or press Control and c at the same time in the command line window.

Using the Webservice

To use a Phidget over the Webservice, you'll want to:

  • Have two different computers connected to the same network. We will call the computer that has the Phidget directly connected to the USB port the host. The client will be the computer that runs a Phidget application to connect to the Phidget attached to the host. Please note that If you only have a single computer, you can also connect to the Phidget over the Webservice. The computer will simply act as both a host and client.
  • Start the Webservice on the computer that directly connects to the Phidget
  • Run your program on the remote computer that will control the Phidget over the network

The easiest way to test these steps on OS X is to set up the Webservice and run the Phidget program on the client. Please follow these steps:

1. On the host, open up the Phidget Preference Pane and traverse to the Webservice tab.

OS X Preference Pane Webservice

2. Leave all fields the way it is, and click on Start WebService to run the Webservice.

3. You can determine that the Webservice is running by looking at the status on the right side.

OS X PreferencePane Webservice Running

4. Ensure that the Phidget is plugged in to the host.

5. On the client's Phidget Preference Pane, open up the Bonjour tab. You will see the Phidget that is plugged into the host as one of the entries listed. Double click it to open the example application.

OS X PreferencePane Bonjour.png ‎

6. The example application will open up, and you will be able to interact with the Phidget over the Webservice.

OS X PreferencePane Example

7. You can confirm that the Webservice was indeed behind this exchange by killing the Webservice process while still allowing the remote program to run. On the host's Phidget Preference Pane, traverse to the Webservice tab. Hit Stop WebService to terminate the Webservice.

OS X PreferencePane Webservice Running

8. Take a look at the example application on the client. Since the application can no longer connect to the Webservice, the attached state of the Phidget is false.

OS X PreferencePane Example Stopped

Debugging the Webservice

In addition to enabling logging in your Phidget code, you can get additional debugging information from the Webservice itself. This additional debugging can only be enabled from the command line approach to start the Webservice. Debug information is enabled by specifying the -v option:

 phidgetwebservice21 -v -n "myServer"

The debugging information is shown in command line output.

Advanced Uses

Manual File Installation

A reminder of the installer and what it does, and how to do it manually when wanting to distribute our libraries with your code.

Description of Files

All files with the Preference Pane and their default installation locations.

Special Cases of Library Install

Cover how customers can distribute Phidget libraries with their code, refer them mostly to their appropriate language page.

Content copied from the old page:

If you wish to only install the things you need, please refer to your language page for instructions on how to manually install the libraries for your language.
also explain even more special cases on 64bit systems, if applicable(ie, c.

Other Advanced Uses

Additions to this list should be things we find people request over tech support. Ask Brian for more!

Common Problems and Solutions

None, yet.