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1070_0_Product_Manual - October 28, 2010 8:52 AM

Wireless Networking System

Wireless networking is supported using the supplied adapter and is configured through the configuration interface. 

The back end of the system will be explained here.
Wireless networking is supported using wpasupplicant. When Udev detects that a wifi adapter is plugged in, it will 

start an instance of each wpa_supplicant and wpa_cli using the script ‘/sbin/wifi’. The wpa_supplicant daemon 

reads from it configuration file at ‘/mnt/userspace/.config/wpa_supplicant.conf’ and takes care of associating with 

whichever networks are available and specified in the config file. The wpa_cli daemon then waits for attach and 

detach notifications from wpa_supplicant and runs the ‘/sbin/wpa_action’ shell script to deal with setting up IP 

address, etc. based on the wireless network configuration file ‘/mnt/userspace/.config/wireless_network.conf’
All of this should work behind the scenes. You may need to manually edit the wpa_supplicant.conf file in order to 

connect to unusually configured access points, of ad-hoc networks.

Configuration System

The configuration system used by the website is stored in ‘/mnt/userspace/.config’. These files should generally not 

be changed manually, but there is no reason why they could not be. It’s very easy to enter invalid data that could 

cause the system to behave unexpectedly or not boot.

Nand Layout

The board contains 64MB on Nand. This nand is split into 7 partitions as follows:
0: u-boot 

 

size: 256K 

 

Read Only

1: u-boot_env   

size: 16K 

 

Read Only

2: recovery_kernel 

size: 2M 

 

Read Only

3: kernel 

 

size: 2M 

 

Writable

4: recovery_fs   

size: 4M 

 

Read Only

5: rootfs 

 

size: 50M 

 

Writable

6: userspace 

 

size: ~5.5M 

 

Writable

The final size of userspace depends on NAND factory bad blocks, but will always be at least 5M.
U-Boot and recovery kernel and filesystem cannot be written from Linux - this is a safety measure. 

Boot Process

This describes the boot process from power on.
1. Processor loads first 4 bytes from NAND into Steppingstone and runs it.
2. Steppingstone sets up RAM, copies u-boot from NAND into RAM and runs U-Boot.
3. U-Boot initializes the processor, sets GPIO state, etc., copies the linux kernel into RAM, sets up the kernel 

command line arguments, checks that the kernel image is valid, and boots it.
4. Linux boots, bringing up USB, Networking, NAND, etc. and then mounts the rootfs NAND partition on /.
5. init gets run as the parents of all processes, as uses the /etc/inittab script to bring up the system. This includes 

mounting other filesystems, settings the hostname, and running the scripts in /etc/init.d, among other things.
6. inittab then runs any custom user applications.

Содержание 1070 - PhidgetSBC

Страница 1: ...Product Manual 1070 PhidgetSBC ...

Страница 2: ...Phidgets 1070 Product Manual For Board Revision 0 Phidgets Inc 2009 ...

Страница 3: ...gram 9 Entering New Password 10 Updating the Firmware 12 Testing the Phidget InterfaceKit 8 8 8 Over the Webservice 14 Viewing the Webcam 14 Rebooting Resetting the PhidgetSBC 15 User s Guide 15 Layout 16 Basic Use 16 Phidget Webservice 16 Reliability 17 Finding Phidgets on the Network 17 Configuration 18 The Configuration Page 18 Main PhidgetSBC Info 18 Main About 18 Status General 19 Status Phid...

Страница 4: ... a Wireless connection 27 No DHCP Server 28 Advanced User s Guide 28 Custom Applications 29 GCC 29 Phidget Dictionary 29 SSH 29 Customization 30 Custom Kernels and Filesystem 31 Technical 31 Power Over Ethernet 31 Hardware Layout 31 Software Layout 31 Date and Time 32 Wireless Networking System 32 Configuration System 32 Nand Layout 32 Boot Process 33 U Boot 33 Drivers for USB to Serial adapters 3...

Страница 5: ...Libraries 36 Programming Hints 36 Networking Phidgets 36 Documentation 36 Code Samples 37 API for the InterfaceKit 8 8 8 38 Technical 38 Analog Inputs 41 Digital Inputs 44 Digital Outputs 46 Using the 4 Port USB Hub 47 Product Specifications 48 Product History 48 Support 48 Legal Information ...

Страница 6: ...full shell access via a built in SSH server full GCC and development tools the GDB debugger and all of the standard command line tools expected on a modern Linux system This allows for on board development in C and full access to the system for customizing An integrated PhidgetInterfaceKit 8 8 8 allows you to connect devices to any of 8 analog inputs 8 digital inputs and 8 digital outputs It provi...

Страница 7: ...tion pressure etc Phidgets offers a wide variety of sensors that can be plugged directly into the board using the cable included with the sensor Here is a partial list of sensors currently available IR Distance Sensor IR Reflective Sensor Vibration Sensor Light Sensor Force Sensor Humidity Sensor Temperature Sensor Magnetic Sensor Rotation Sensor Voltage Divider Touch Sensor Motion Sensor Mini Joy...

Страница 8: ...appropriate outlet The red status indicator light located near the USB ports should be lit if the unit is receiving power The green LED located above the red LED indicates boot status The green LED will turn on and off once during boot and then turn back on when everything is running Other Phidgets can also be connected to the 1070 using a USB cable 6 Getting Started Checking the Contents You shou...

Страница 9: ... back of your board Click the PhidgetSBC tab in the Phidget Control Panel Double click on the PhidgetSBC device to bring up the PhidgetSBC configuration panel in your default web browser Testing Using Windows 2000 XP Vista Downloading the Phidgets drivers Make sure that you have the current version of the Phidget library installed on your PC If you don t do the following Go to www phidgets com Dri...

Страница 10: ... available You can find your SBC s firmware version by clicking on Main PhidgetSBC Info If your version is older you must update your SBC firmware Download from Phidgets inc If you have a fast ethernet connection you can download the new firmware directly into your SBC Note that the Download from Phidgets Inc will not appear if the SBC cannot connect to www phidgets com Select Download from Phidge...

Страница 11: ...com Go to www phidgets com Drivers and click on the Download Icon besides PhidgetsSBC You can then store the Firmware file on a local drive Use the Upload command to upgrade the firmware on your SBC Once the firmware has been downloaded and the flash memory has been rewritten the SBC will reboot The Green light will flash once and then turn off Once it turns back on the SBC is ready to use ...

Страница 12: ...BC is not connected to the internet or connected with a low speed connection you can download the file from www Phidgets com Go to www phidgets com Drivers and click on the Download Icon besides PhidgetsSBC You can then store the Firmware file on a USB memory stick Plug in the USB stick in one of the USB port on the SBC The USB Drive option will show up automatically Select the Firmware file and c...

Страница 13: ...on the white box to turn on the LED Clicking again will turn the LED off The bottom row shows the status of the request while the top row displays the status of the digital output as reported by the device Test the digital input by 3 disconnecting the wire end connected to the digital input connector The tick mark in the box will go away Click on the Ratiometric Box if 4 your sensor is ratiometric...

Страница 14: ...nges Click commit changes to confirm 5 activation of the webcam The webcam stream should now be 6 visible Rebooting Resetting the PhidgetSBC To simply reboot the device quickly press the black reset button found between the USB connectors and the 1 power terminals To reset the firmware press hold the button for 10 seconds until the red status LED begins to blink All data 2 will be lost and the ope...

Страница 15: ...here 2 1 4 5 3 6 8 9 7 G 0 1 2 3 4 5 6 7 G G 0 1 2 3 4 5 6 7 G G 1 2 3 4 5 6 7 0 Layout Numbered in the circles on the diagram 10 100baseT Ethernet 1 Four USB Full Speed Ports 2 Indicator LEDs 3 Reboot Reset Button 4 Power input terminal 5 Power input jack 6 Eight Interface Kit Digital Inputs 7 Indexed 0 to 7 Eight Interface Kit Digital Outputs 8 Indexed 0 to 7 Eight Interface Kit Analog Inputs 9 ...

Страница 16: ...g a Phidget over the network is nearly the same as opening one locally The main differences are Different open calls that include server information New calls OpenRemote and openRemoteIP naming depends on language Access to Webservice based properties Server hostname port and ID Access to server connect and disconnect events and network error events Phidgets can be opened by more then one separate...

Страница 17: ...ger can also be used to find all Phidgets on any Webservice through Bonjour by specifying a NULL Server ID See your specific language s guide for more information about coding with the Phidget Manager Configuration The PhidgetSBC is configured through a built in configuration interface through an internet browser much like your wireless access point or router You can double click on the device und...

Страница 18: ...ain PhidgetSBC Info This is the first page you should see after loading the configuration Interface It contains version information for the PhidgetSBC as well as the MAC address and time System Information Board Name Name of the device It should always read PhidgetSBC Board Revision Board revision number This tracks the hardware design Firmware Version The version of firmware currently being used ...

Страница 19: ... data is also saved here Memory Total Total random access memory RAM in bytes Available Available RAM in bytes Status Phidgets Library Version The version of the installed Phidget21 library These libraries are included and are updated along with the firmware List of attached Phidgets A list of all detected Phidgets connected to the PhidgetSBC It includes the integrated PhidgetInterfaceKit and disp...

Страница 20: ... the PhidgetSBC board to be opened over the network This is enabled by default and starts with the SBC The webservice also exposes a key value dictionary which can optionally be used for communication between applications written for the PhidgetSBC and applications running on your local computer This page lets you view and modify its settings Please see the Advanced User s Guide for more informati...

Страница 21: ...rspace Browser The userspace browser gives access to download upload delete and edit for files in the home directory home user of the user user This is the ideal location for storing any arbitrary files or data and is the recommended location of your C code projects on the PhidgetSBC If you wish to remove files or folders simply click the red X beside their name in the Filesystem Browser The syste...

Страница 22: ...s Application page Start Stop This button is for starting or stopping the execution of the program specified under application settings Starting a program will generate stdout and stderr logs View stdout You can view the standard console output of your program through this link View stderr In the event of an error that halts program execution its corresponding error message is printed here Filesys...

Страница 23: ... port that the video stream is sent to Password Protect the webcam stream with a password This will add a simple username and password prompt whenever you view the webcam stream including on this page The username is webcam Set to nothing to disable passwords System Settings This is where general system setting are set up Time settings is where the timezone gets set up By default the PhidgetSBC sh...

Страница 24: ...r password System Backup Restore This is where the system can be backed up to disk and restored You have the option to backup the configuration data only or backup everything Configuration data includes things like network setup passwords time settings etc Backing up everything will add to that any custom applications and the user and root home directories basically the entire userspace partition ...

Страница 25: ... high speed connection to the Internet The other method is file upload which involves downloading the firmware from the website ahead of time If you have a low speed internet connection or the PhidgetSBC is not connected to the internet then this method will be recommended If the Erase Userspace partition option is selected all custom applications and board configuration will be lost The board wil...

Страница 26: ... an IP address would be used The default name for the PhidgetSBC is phidgetsbc so phidgetsbc local would be its mDNS hostname If you have more than one PhidgetSBC on the network their host name will appear like phidgetsbc local phidgetsbc 1 local phidgetsbc 2 local etc They will also be given the server ID usually similar to the host name as phidgetsbc phidgetsbc 1 phidgetsbc 2 etc If you use Bonj...

Страница 27: ...default and link local addresses should work Windows With Bonjour installed link local addresses should work Linux These routes need to be added where eth0 is your primary interface route add net 169 254 0 0 netmask 255 255 0 0 dev eth0 metric 99 route add default dev eth0 metric 99 For more information visit http developer apple com qa qa2004 qa1357 html Even with Bonjour installed you may have t...

Страница 28: ...package that is easier to manage and can be executed from the command line or even by double clicking the file if you operating system environment is configured properly Under the command line you can use the jar utility from the Java SDK to package the class and java files The process starts by going to the directory where your program is located and creating a manifest file This manifest file te...

Страница 29: ...control on the PhidgetSBC itself in case of network failure See the Phidget Programming manual for its use in your language of choice SSH The built in SSH Server can be enabled to allow console access to the PhidgetSBC By default this server is disabled SSH access to the PhidgetSBC is enabled in the Network Network configuration page on the PhidgetSBC Projects on the PhidgetSBC should be stored in...

Страница 30: ...nto the process Buildroot downloads all of the source code it needs from open source repositories so the Buildroot distribution itself is fairly small Buildroot needs to be run on Linux Unpack the distribution and run the following commands to set everything up touch config make BOARD phidget_sbc getconfig You can build your filesystem by typing make and change configuration options using make men...

Страница 31: ...ed users root and user Their home directories are located in userspace and sylinked into home user and root Configuration data is located at mnt userspace config This is where all configuration that can be set through the website is located User applications are stored in mnt userspace userapps each is their own directory Changes to the root filesystem can be made by re mounting the root filesyste...

Страница 32: ...changed manually but there is no reason why they could not be It s very easy to enter invalid data that could cause the system to behave unexpectedly or not boot Nand Layout The board contains 64MB on Nand This nand is split into 7 partitions as follows 0 u boot size 256K Read Only 1 u boot_env size 16K Read Only 2 recovery_kernel size 2M Read Only 3 kernel size 2M Writable 4 recovery_fs size 4M R...

Страница 33: ... it is damaged or overwritten it is difficult to fix Refer to U Boot documentation here http www denx de wiki DULG Manual for more information on using U Boot Drivers for USB to Serial adapters The SBC kernel contains driver support for the following USB to Serial Adapters Please consult the kernel documentation for details into the driver support for the USB to Serial adapters Company Product Con...

Страница 34: ...ng S3C2410 Core ARM920T CPU Speed 266MHz Nand size 64MB SDRAM 64MB Boot time 30 60 Seconds Ethernet 10 100baseT USB 4 Port Full Speed Power Input 6 15VDC Power Consumption 1 2 watt base w Ethernet Per additional USB device1 2 5 watt Max Wireless USB Dongle 802 11b g 1 including the PhidgetInterfaceKit ...

Страница 35: ...s All you need to know is how to program We have developed a complete set of Application Programming Interfaces API that are supported for Windows Mac OS X and Linux When it comes to languages we support VB6 VB NET C NET C C Flash 9 Flex Java LabVIEW Python Max MSP and Cocoa Architecture We have designed our libraries to give you the maximum amount of freedom We do not impose our own programming m...

Страница 36: ...so makes it possible to communicate with other applications that you wrote and that are connected to the PhidgetWebService through the PhidgetDictionary object Documentation Programming Manual The Phidget Programming Manual documents the Phidgets software programming model in a language and device unspecific way providing a general overview of the Phidgets API as a whole You can find the manual at...

Страница 37: ... used to convert SensorValue into the measured property int SensorRawValue int SensorIndex get Returns the full resolution of the Analog Input This is a more accurate version of SensorValue The valid range is 0 4095 Note however that the analog outputs on the Interface Kit 8 8 8 are only 10 bit values and this value represents an oversampling to 12 bit double SensorChangeTrigger int SensorIndex ge...

Страница 38: ... Connector Molex 70553 0002 3 Position Right Angle PCB Connector Gold Molex 70553 0037 3 Position Right Angle PCB Connector Tin Molex 15 91 2035 3 Position Right Angle PCB Connector Surface Mount Note Most of the above components can be bought at www digikey com Electrical The maximum total current consumed by all Analog Inputs should be limited to 400mA The analog measurement is represented in th...

Страница 39: ... sensors the error is quite predictable over the life of the sensor and it can be measured and calibrated out in software Non Ratiometric Configuration Voltage Reference error The 5 0VDC voltage reference is accurate to 0 5 This can be a significant source of error in some applications but can be easily measured and compensated for Connecting non Phidget devices to the Analog Inputs Here are some ...

Страница 40: ...surement Specialties MSP 300 Pressure sensors ranges up to 10 000 PSI Freescale Semiconductor MPXA MPXH Gas Pressure Sensors Allegro ACS7 series Current Sensors ranges up to 200 Amps Allegro A1300 series Linear Hall Effect Sensors to detect magnetic fields Analog TMP35 TMP36 TMP37 Temperature Sensor Panasonic AMN series Motion Sensors Honeywell FS01 FS03 Small accurate Piezo resistive load cells A...

Страница 41: ...tage Required to sw itch is dependent on VG USER APPLICATION VS1 Q1 INPUT GROUND Phidget Digital Input 100nF 15K 15K 5V 5V NPUT GROUND Phidget Digital Input x1 Monitoring the position ofa Relay K 1 Isolating a Digital Input w ith an Optocoupler Detail of Digital Input USER APPLICATION Relay contact causes Digital Input to report TRUE Current through LED causes Digital Input to rep Using an FSR as ...

Страница 42: ...th an NPN Transistor Collector Emitter Current 270uA causes Digital Input to report TRUE Collector Emitter Current 67uA guarantees Digital Input to report FALSE Drain Source Current 270uA causes Digital Input to report TRUE Drain Source Current 67uA guarantees Digital Input to report TRUE USER APPLICATION USER APPLICATION 10K R1 VS1 1K R1 VS1 U1 OptoCoupler INPUT GROUND Phidget Digital Input INPUT...

Страница 43: ...gital inputs are reported back to the PC periodically During this sampling period if a digital input was true for greater than 4 0ms the digital input is guaranteed to be reported as true in software This makes the digital input much more sensitive to reporting TRUE state and makes it useful to watch for short events Any Digital Input True events of less than 1 5ms are never reported FSR USER APPL...

Страница 44: ...r voltage AC devices that can also be controlled in the same fashion Driving an LED w ith the Digital Output USER APPLICATION D1 OUTPUT GROUND Phidget Digital Output 250 5V Detail of Digital Output TRUE FALSE 5V OUTPUT GROUND Maximum current through transistor w ill depend in part on the transf er characteristics of the optocoupler Be conservative and refer to the datasheet ofthe optocoupler or DC...

Страница 45: ...l AC or DC Driving an LED w ith the Digital Output USER APPLICATION USER APPLICATION USER APPLICATION Phidget Digital Output x1 VS1 VS1 Load U1 OptoCoupler Load D1 The Load can also be sw itched with the SSR on the high side Using a 3052 SSR Board Driving Output causes Can be used to co USER APPLICAT The Load can also be sw itc 3052 RED BLACK OUTPUT GROUND Phidget Digital Output OUTPUT GROUND Phid...

Страница 46: ...RUE FALSE 5V OUTPUT GROUND Driving an LED w ith the Digital Output USER APPLICATION Phidget Digital Output x1 D1 OUTPUT GROUND Phidget Digital Output Using the 4 Port USB Hub Powering the PhidgetSBC An external 6 15V supply must used to power the PhidgetSBC and any attached USB devices Connecting additional USB devices to the PhidgetSBC is as easy as plugging them into the on board 4 port hub Each...

Страница 47: ...istance 15K ohms Analog Input Update Rate 65 samples second Digital Output Update Rate 125 samples second Digital Input Update Rate 125 samples second Digital Input Recommended Wire Size 16 26 AWG Digital Output Recommended Wire Size 16 26 AWG Digital Input Wire Stripping 5 6mm strip USB Power Current Specification Max 500mA Quiescent Current Consumption 13mA Available External Current source 487m...

Страница 48: ...00 PM Mountain Time US Canada GMT 07 00 or E mail us at support phidgets com Legal Information For licensing and warranty information please see the Phidgets End User License It is available on our website at http www phidgets com documentation Licenses Phidgets_End_User_License_Agreement pdf By using this product you are agreeing to be bound by the terms and conditions set forth by this licensing...

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