ETH32 User Manual - Winford Engineering
Contents
1. 1 8 GREEN LINK __ YELLOW ACTIVITY 25 RJ45 Jack Pin Assignments Pin Function TX Transmit Data TX Transmit Data RX Receive Data Not connected Not connected RX Receive Data Not connected GOlIAl NI AIAI WIN Not connected 8 3 Power Options The ETH32 device may be powered from one of several methods The DC power jack This accepts unregulated DC power It is internally regulated and protected against accidental reverse polarity DB25 unregulated power pin Connector B pin 24 This is directly connected to the DC power jack It is therefore also internally regulated and protected against accidental reverse polarity DB25 Vcc pins Connector B pins 12 and 13 The Vcc pins are connected to the output side of the internal voltage regulator and may be used to provide power to the ETH32 or to power low current auxiliary devices Auxiliary Power Output If the board is powered through one of the above options the Vcc pins may be used to provide low current 5V power for auxiliary devices 26 gt Power Input Alternately the ETH32 may be powered through the Vcc pins However there is no voltage regulation or reverse polarity protection Clean regulated 5V power must be provided and extra care must be taken to connect power2. line or an output line When configured as an input a line may be configured to be pulled up internally with a pull up resistor or float Each digital I O port has three registers which allow configuration and usage of the I O lines of that port Direction Register Controls whether each line is an input or an output This register may be read and written Output Value Register When a line is configured as an output this register controls the output voltage low or high When a line is configured as an input this controls whether an internal pull up resistor is enabled on that line This register may be read and written Input Value Register The value of this register indicates the state low or high of each line of the port This is a read only register The following diagram shows an example scenario for one of the 8 bit digital I O ports Direction alallala b Register d J sl L J gd 1 J Output e N Value 1 i Ss Value unknown Input SP yf 5 4 7 ec Tool gy es determined by input Value i i i i 1 J i i voltage level L Input floating no pull up Input with pull up resistor Output low Output high 4 2 Analog Channels The ETH32 includes the capability of reading analog input signals There are many different available combinations of which pins are used to obtain analog readings and in what way the pin voltages are interpreted First it
3. 9 1 Absolute Maximum Ratings Storage Temperature eege 30 C to 70 C Ambient Operating Temperature 0 0 0 0 ceeeeeeeees 0 C to 55 C Operating Humidity 5 to 95 non condensing Auxiliary Power Output Current 0 0 0ccccceesseeeeeeteeeeeee 250 mA Voltage on any I O pin with respect to Ground EEN 0 5V to Vect0 5V Voltage on External Analog Voltage Reference with respect to Ground ss ss ss000 0 5V to Vect0 5V Voltage on Reset with respect to Ground 0 5V to 13 0V Unregulated Power Supply Voltage eceecceeesseeeeeeees 25V Maximum Vcc Operating Voltage if device is powered through Vcc pins 6 0V DC Current pet WO Pin EE 40 0 mA Maximum I O Port Sink Current Sina all VO te 390 mA SU OF Port Re E 85 mA Sum of Ports 1 2 4 and 5 mme 100 mA Sum of Port 3 pins EE 100 mA Maximum UO Port Source Current Sum ofall RE 400 mA SUMP of Port Le E 95 mA Sum of Ports 1 2 4 and 5 mme 100 mA Sum of Port e EE 100 mA Notes 1 The specified operating temperature is based on the following conditions e 7 5VDC unregulated power input e 250 mA auxiliary power output current e Every I O pin driving a 1kQ load Variations of this setup could adjust this temperature range For unusual requirements or environments please contact Winford Engineering 2 Voltages above 7 5V could decrease the maximum operating temperature range Warning Stresses beyond those listed under Absolute M
4. During normal usage there may be any number of routers between the PC and the ETH32 In fact the ETH32 device could be half way around the world If the PC being used for configuration has a firewall enabled whether it is built into Windows or add on it may need to be disabled during the configuration of the ETH32 The firewall may reject configuration packets from the ETH32 if it is configured with and using an IP address that is not expected on the local network If the ETH32 is not able to be found by the utility be sure to disable the firewall Once the ETH32 has been initially configured with an appropriate IP address future configurations should not require the firewall to be disabled 16 6 2 3 Configuration Utility The ETH32 network configuration utility can be used by following these steps Set the ALLOW CONFIG switch on the ETH32 device to the Y position Otherwise the ETH32 will not allow its configuration settings to be modified Launch the configuration utility by selecting Winford ETH32 gt ETH32 Network Configuration on the Start Menu A window similar to this will be shown ETH32 Configuration Main Advanced Network Interface Dn 1 1 45 Local Area Connection Realtek ATL8139 810x Family Fast Ethernet NIC Packet Scheduler Miniport KM Broadcast Address Iw Auto Find Devices MAC Address Serial Number Firmware Configurable DHCP Active IP Device Information MAC Addre
5. in the right polarity Failure to meet these requirements will permanently damage the device Power should be supplied by only one method at a time The ETH32 s internal power connections are summarized in the following schematic 4 N Connector B DC Power a a Jack SR s a Jars lated 5V Regulator vars e ower in unregulated gt In Out 4 K S 8 Lut Lulu E 3 ethemet ontroller E 3 controller TmT TTT Ground 8 4 VO Ports The ETH32 has four 8 bit I O ports ports 0 1 2 and 3 and two 1 bit T O ports Ports 4 and 5 For all I O pins the ETH32 includes internal InF capacitors between the connector pin and ground near the DB25 connector in order to reduce the chances of electrical noise causing erratic operation 27 LL e B ee a l mmm nF micro gt controller TTT Connector A PORT 0 SHOWN PORTS 1 2 4 5 SAME On all ports except port 3 the DB25 connector pins are connected directly to the microcontroller in the ETH32 Because port 3 is also used for analog inputs the ETH32 includes simple internal 1K 0 1uF R C filters on these lines in addition to the InF capacitors The following diagram shows the configuration of port 3 Connector B PORT 3 ONLY 28 9 Specifications
6. is important to understand a few concepts 4 2 1 Analog UO Pins There are eight analog capable I O pins which are shared with the pins of digital I O port 3 Although there are many combinations it is helpful to remember that all analog readings originate from these eight T O pins the only exception being the reference channels 4 2 2 Physical Channels The voltage levels on the analog I O pins can be interpreted in different ways by the ETH32 device There are 32 different combinations offered by the ETH32 device These are referred to as physical channels throughout the ETH32 documentation The physical channels are grouped into the following categories Single Ended Channels measure the voltage of a pin with respect to ground Differential Channels measure the voltage difference between two analog I O pins Reference Channels measures fixed internal voltages used for calibration purposes There are eight single ended channels one for each analog I O pin 22 differential channels and two reference channels 4 2 3 Logical Channels The ETH32 uses the concept of a logical channel to allow you to specify which of the physical channels should be continuously updated within the device and potentially monitored for event thresholds see the Event Monitoring section page 11 There are eight logical channels Each logical channel can be assigned by you to obtain its reading from any arbitrary physical channel The logic
7. providing the ability to count logic pulses on those pins When enabled each 11 counter can be configured to increment on either the rising or falling edge of its associated I O pin One of the two counters is 8 bit and the other is 16 bit 4 6 Built in LEDs The ETH32 device includes two user controllable LEDs The LEDs provide a quick and easy way to display a status condition error or some other condition your application needs to display 4 7 EEPROM Storage The ETH32 provides 256 bytes of EEPROM memory on the microcontroller which you can use for any data that you wish to store The contents of the memory are preserved through power losses and reset so it is perfect for storing device identification calibration data or other non volatile data EEPROM storage functionality is included with firmware v3 000 and greater 4 8 Power Up Defaults When the ETH32 device is initially powered up or reset all I O lines start out as inputs and most features start out disabled This helps to prevent hardware conflicts with other devices that may be connected to the ETH32 At power up or reset the device is configured as follows All digital I O ports are configured as inputs The output value registers of all digital I O ports are set to zero The LEDs are turned off The Analog to Digital Converter is disabled The analog voltage reference is configured to be the external reference pin All events are disabled for all c
8. time a lease needs to be renewed at which point an additional delay of about 0 6ms will occur typically just once per lease renewal If it happened to come at a worst case moment this delay could be in addition to the delay timing numbers provided above How frequently lease renewal occurs depends on the DHCP server configuration but can range from every few minutes to once a week or even longer 9 3 9 User EEPROM Writing Storing data into the user accessible EEPROM memory is a relatively slow process Time to write one EEPROM byte typical 9 ms The whole process of writing all 256 bytes will therefore take about 2 3 seconds This will temporarily interrupt event monitoring although not for the entire 2 3 seconds at once while the write is taking place 9 4 TCP IP Connections The ETH32 supports five 5 simultaneous TCP IP connections 9 5 Analog to Digital Converter The analog to digital converter ADC is contained within the microcontroller used on the ETH32 It provides these specifications 10 bit Resolution 0 75 LSB least significant bit Integral Non linearity 1 5 LSB Absolute Accuracy For differential channels if 1x or 10x gain is used 8 bit resolution can be expected If 200x gain is used 7 bit resolution can be expected 35 9 6 Counters Counter 0 16 bit counter values from 0 to 65 535 Counter 1 8 bit counter values from 0 to 255 Both counters are hardware counters contained within the
9. 36 10 Appendix ETH32 Accessortes 36 10 1 ET 36 10 2 Breakout Boats EE 36 10 3 Breadboard WEE 39 10 4 Cables Connectors EE 39 LO S Relay BAIS EE 40 10 6 Wireless EE 41 v2 1 1 1 Introduction 1 1 Overview The ETH32 is a flexible general purpose I O device which communicates over Ethernet It features 34 configurable I O lines which can be configured to operate in various modes The available modes include digital I O analog inputs PWM outputs and counter inputs With this variety of modes available the ETH32 is capable of monitoring and controlling many different processes and applications A notable feature of the ETH32 is its event driven capability when handling inputs When enabled this feature eliminates the need to poll inputs by locally monitoring input s on the ETH32 and sending an event notification via Ethernet when an input meets certain criteria Event notification capability is included for digital inputs analog inputs and counters In order to support future enhancements the ETH32 supports firmware upgrades in the field Additional programming hardware not included is required for this function 1 2 Package Contents The package you receive should contain the following items 1 This manual 2 The ETH32 device 3 CD containing application libraries sample code and documentation 1 3 Disclaimer The ETH32 is not intended or designed for military medical or other life critical
10. 52 ra 6 01 l 7 We e Y N 10BASET DC POWER ALLOW CONFIG ORD 60 18 2 PLCS JL ETH32 POWER O ec xX Ma LEDO O ES ki D N Ss SI LED1 O fir WINFORD ENGINEERING www winfordeng com CONNECTORB CONNECTOR A PORT 3 PORTS 0 2 Rm R oeeo eooo oo ooo 1 Connector A Ports 0 1 and 2 2 Connector B Port 3 miscellaneous signals 3 DC Power Jack 4 RJ45 Ethernet Jack 21 8 2 Connector Pinouts 8 2 1 DB25 Connectors Both DB25 connectors are female connectors The DB25 female connector pins are numbered as shown on the following diagram 22 Connector A Pin Assignments Pin Primary Function Alternate Function 1 Port 0 bit 0 2 Port 0 bit 1 3 Port 0 bit 2 4 Port 0 bit 3 5 Port 0 bit 4 6 Port 0 bit 5 7 Port 0 bit 6 Counter 0 8 Port 0 bit 7 Counter 1 9 Port 1 bit 0 10 Port 1 bit 1 11 Port 1 bit 2 12 Port 1 bit 3 13 Port 1 bit 4 14 Port 1 bit 5 15 Port 1 bit 6 16 Port 1 bit 7 17 Port 2 bit 0 18 Port 2 bit 1 19 Port 2 bit 2 20 Port 2 bit 3 21 Port 2 bit 4 PWM 0 Output 22 Port 2 bit 5 PWM 1 Output 23 Port 2 bit 6 24 Port 2 bit 7 25 Ground 23 Connector B Pin Assignments Pin Primary Function Alternate Function 1 Port 3 bit 0 Analog 0 2 Port 3 bit 1 A
11. IP address that is valid and available on this segment of your network Ask your network administrator for an available IP address If you are the network administrator you should choose an IP that is not being used by any other device and is in the same subnet as your PC For example if your PC s Ethernet card has the IP address of 192 168 1 1 and a subnet mask of 255 255 255 0 any available IP from 192 168 1 2 through 192 168 1 254 would be acceptable The lowest address in a particular network e g 192 168 1 0 is reserved and cannot be assigned to the ETH32 or any other device The highest address e g 192 168 1 255 is reserved as a broadcast address Subnet Mask This setting indicates which IP addresses are local and which require going through the gateway If you are unsure this setting can typically be copied from the configuration of PCs on the same network segment A setting of 255 255 255 0 is common Gateway IP This is the IP address of the router that should be used to send data outside of the local network segment If you are unsure this setting can typically be copied from the configuration of PCs on the same network segment If the ETH32 is being used on a network without a router a value of 0 0 0 0 may be entered After you have entered the new network configuration settings click the Store Settings button to save the settings to the ETH32 A message box will be shown confirming that the settings have been success
12. Netmask 255 255 255 0 Edit Selected Device Configuration Gateway 192 168 1 1 Examine the table and select the ETH32 which you would like to configure Each device is identified by a unique MAC address and serial number S N Both of these numbers are printed on the back of the ETH32 device Click on the device you would like to configure and then click the Edit Selected Device Configuration button A window similar to this will be shown Edit Configuration Device Information MAC Address 00 D0 87 D3 10 D3 Serial H 105 44004 Firmware Version 3 000 Currently Active IP Settings Using DHCP Yes IP Address 10 1 1 52 Subnet Mask 255 255 255 0 Gateway IP 10 1 1 1 Use DHCP v The settings below will be stored but not take effect if DHCP is enabled IP Address 1903 191 100 Subnet Mask 255 255 255 0 Gateway IP 192 168 1 1 Store Settings Cancel 18 Modify the settings as appropriate for your network A full explanation of these settings is beyond the scope of this manual but brief explanations are provided here Use DHCP If this box is checked the ETH32 will obtain an IP address automatically using the Dynamic Host Configuration Protocol DHCP and the IP Address and other settings that are stored in the ETH32 will not be used A DHCP server must be present on your network for this to work DHCP support is included in ETH32 firmware v3 000 and greater IP Address Enter an
13. Table of Contents Te Introd ction EE 3 ll HEEN Ee 3 1 2 Pack ge Contents ss nenne aat riea AEA AE E 3 Te DINANT oa A EAEE EE E E E A EE E A EEE 3 1 4 EMC Conformance Statement 4 1 5 System ReEquireMents i retispiaccrvse ous tadtcodoneveens heal stn wtenacenteaeast os 4 Diss WW AL TAIN aise acts a EE 5 2 AS Technical Ee e 5 3 QuickStart Guide EE 6 A Feature s eegne ed 7 4 Digital O e CG y AD Analog EEN 8 4 3 e E EE EE 11 4 4 Pulse Width Modulation PWM Outmmuts eeeeeeees 11 4 5 Digitali e EE 11 RE GR EE 12 4 7 EEPROM Storage eege n e a R 12 4 8 Power Up EE EE 12 4 9 TCP IP ee e CN 13 5 SOM Ware Installation EE 14 5 1 Windows InstallatiOtiy csi stsnactanicceressana Ghia nivecata tacmnernasen 14 5 2 Linux EE ee 14 6 Network Connections and Confteuraton 15 6 1 Connecting the ETH32 to the Network 15 6 2 Configuring the CAR KE 15 7 Developing PC Apnpleatnons 20 8 Hardware Information ss cascccsssescsvusdsdnnadsanien sons dbenstteretvansdetacsencadisavns 21 8 1 Dimensions and Connector Locatong 21 8 2 Connector PF 1 OUS EE 22 6 5 POWESE OPHION EE 26 8 4 VO POTS eni a n a ied poet de E ERR 27 9 Specifications nnne eee ee 29 9 1 Absolute Maximum Kartngeg eege dees eege eege 29 9 2 Electrical Chara Cteristi erhteedeetegeig eege egegded ees eg 30 9 3 Performance CHArACterisStie EN 31 9 4 TCP IP E CN 35 9 5 Analog to Digital Converter 35 936 EE ON He 9 7 Pulse Width Modulation Outmmuts
14. The programming libraries example applications and configuration utility provided by Winford Engineering require a PC with the following minimum requirements e Intel 32 bit or 64 bit CPU compatible architecture Windows 95 or later including Vista and Windows 7 or Linux distribution with 2 0 kernel or later Properly configured Ethernet adapter Properly configured TCP IP configuration and IP address e To create PC applications utilizing the ETH32 API one of the programming environments compilers listed in the Developing PC Applications section on page 20 is required Using the ETH32 Protocol Reference document other platforms and programming languages can be used Pre compiled libraries for 64 bit systems are currently provided for Windows platforms The API source code can be used to compile 64 bit libraries for Linux or potentially for other non Intel systems as well 2 Warranty Winford Engineering provides a 1 year warranty for the ETH32 device This warranty does not cover the misuse or abuse of this product In the event of product failure Winford Engineering should be contacted for information regarding the return and replacement of the product 2 1 Technical Support If you find yourself in need of technical assistance beyond what is covered in this manual there are several ways to contact Winford Engineering If your problem is not urgent we would prefer that you use e mail Please provide us wit
15. al channels are purely a firmware feature provided to improve the handling of analog readings and event monitoring there is no physical hardware involved 4 2 4 Analog to Digital Converter All analog channels share a single Analog to Digital Converter ADC The ETH32 continuously updates the readings of the eight logical channels as quickly as the ADC and CPU time allows Please see the Analog Channel Refresh Rate section on page 34 for information on the analog sample rate The following diagram depicts the flow of information from the I O pins on the right side to the logical channels on the left side Analog Input Pins Logical Channels Physical Channels shared with Port 3 Channel 0 P SS Analog 0 Channel 1 RA lt 5 A Analog 1 Channel 2 S Analog 2 Channel 3 i Multiplexer Analog 3 Channel 4 g eg al Analog 4 Channel 5 Se Be og 1 d Analog 5 Channel 6 Si g EE 2 J Analog 6 Channel 7 SECH 5 Analog 7 As an example the diagram depicts the Single Ended Analog 1 physical channel being assigned to Logical Channel 0 In this case whenever the value of logical channel 0 is read it will provide the reading voltage of the Analog pin with respect to ground Please see the Connector B Pin Assignments section on page 24 for the location o
16. applications Winford Engineering shall not be held responsible or liable for damages or injury that occur as a result of the use of this product 1 4 EMC Conformance Statement NOTE This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio TV technician for help Changes or modifications to the device not expressly approved by Winford Engineering could result in EMC non conformance thereby voiding the user s authority to operate the device 1 5 System Requirements
17. aximum Ratings may cause permanent damage to the device This is a stress rating only and functional operation of the device at these or other conditions beyond those indicated in the operational sections of this specification is not recommended or implied Exposure to absolute maximum rating conditions for extended periods may affect device reliability 9 2 Electrical Characteristics Condition Ior 20 mA Vcc 5V Parameter Min Typical Max Unit Unregulated Power Input 7 0 20 Vv Vcc Voltage voltage regulator output when power is supplied to 4 90 5 00 5 10 V unregulated input Acceptable Vcc Operating Voltage 4 75 5 00 5 25 y when power is supplied to Vcc pins Input Low Voltage 0 5 0 2 x Vec V Input High Voltage 0 6 X Vec Vcc 0 5 V Reset Pin Low Voltage 0 5 0 2 X Vec UI V Reset Pin High Voltage 0 85 x Vec Vcc 0 5 Vv Output Low Voltage 0 7 y 30 Parameter Min Typical Max Unit Output High Voltage 42 y Condition Ion 20 mA Vcc 5V EE Pull up Resistors 20 50 kQ Idle current 67 mA Notes 1 Max means the highest value where the pin is guaranteed to be read as low 2 Min means the lowest value where the pin is guaranteed to be read as high 3 This is the typical current drawn by an ETH32 device at 25 C which has no outputs enabled both user LEDs off and has no network traffic 9 3 Performance Characteristi
18. cs There are a number of performance characteristics of the ETH32 device which are affected by other tasks the ETH32 is performing This section provides some information about the typical performance level the ETH32 achieves in various scenarios There are many aspects that affect these performance characteristics including network traffic hub switch performance the number of connections to the ETH32 the number of enabled events and the operating system and speed of the PC Therefore these numbers should not be considered as guaranteed but they can still provide a rough idea of ETH32 performance Any of these characteristics are subject to change with future firmware versions 9 3 1 Basic Test Scenario Unless otherwise specified the characteristics provided below were measured within the following test scenario A quiet low traffic Ethernet network e Ethernet hub or switch between ETH32 and PC A single active connection to the ETH32 31 ETH32 in power up default state No events enabled most features disabled ETH32 firmware version 3 000 Where a PC is involved 2GHZ dual core PC running Windows XP mostly idle Any test applications utilized the ETH32 API 9 3 2 Digital UO Port Reads For the purposes of this measurement a digital I O port read is defined as retrieving the current value of any of the digital I O ports of the ETH32 device The PC application performs only one UO read at a time In other wor
19. dboard adapters that allow a DB25 connection to be easily brought into a solderless breadboard These are Winford Engineering product numbers PBC25F and PBC25M http Awww winford com products pbc25 php 10 4 Cables Connectors Adapters Winford Engineering offers e Several varieties of DB25 extension cables EXT25 x 39 Network cables NETx etc DB25 solder cup connectors CNS25x DB25 IDC ribbon cable connectors CNI25x DB25 gender changers MGC25x 10 5 Relay Boards If your project requires switching a load for example a 120 VAC device you may be interested in Winford Engineering s relay boards The relay boards include all the necessary circuitry to drive a relay with the logic level signals provided by the ETH32 Two channel and four channel relay boards are currently available with several different relay coil voltage options The root part numbers are RLY102 and RLY 104 respectively h http www winford com products cat_rly php 40 10 6 Wireless Adapter If you need to communicate with the ETH32 where network cabling is currently not available a wireless network adapter may be an appropriate solution Winford Engineering currently does not sell such adapters but there are several available on the marketplace These act as a bridge between a standard wired Ethernet network and a wireless Ethernet network Some examples of these products include D Link DWL G820 Li
20. discarded due to lack of buffer space In this scenario the event polling rate was 2 4 kHz on average If all port reads were evenly spaced that would mean the period between each time the ETH32 polled the I O ports was 0 4 ms 1 2 4 kHz However this is not the case due to the CPU time required for processing incoming and outgoing packets In this scenario the period between polls reached up to 1 4 ms 9 3 7 Analog Channel Refresh Rate Since the ETH32 provides eight logical analog channels all supporting event monitoring but has only a single Analog to Digital Converter the ETH32 must continuously cycle through and update the eight logical channel readings The refresh rate given here describes how quickly the ETH32 performs each update cycle and therefore the refresh rate of each logical channel This test was performed within the Basic Test Scenario described in section 9 3 1 above with the exception of ADC enabled Analog events enabled on all channels of both analog event banks Analog Channel Refresh Rate typical 470 Hz average Each time an analog channel reading is refreshed the ETH32 checks the reading to determine whether any analog events should be fired Therefore the above refresh rate is also the average analog event polling frequency in this scenario 34 9 3 8 DHCP Overhead When DHCP is enabled there will be a very small amount of additional CPU overhead The worst case scenario occurs at the
21. ds the application waits until the port s value has been returned before beginning another I O read operation Rate of digital I O reads on average 1 200 reads per second 9 3 3 Digital UO Port Writes Digital I O write operations can on average be performed faster than T O reads since there is no need to wait for data to be returned by the ETH32 Many write commands to the ETH32 are automatically combined into larger TCP IP packets by the PC s TCP IP stack greatly reducing overhead Therefore the resulting write operations in this test were not evenly spaced but rather a burst followed by a short pause and another burst and so on Rate of digital I O writes on average 24 000 writes per second 9 3 4 Digital UO Port Write Burst Rate As discussed above when sending a stream of output commands the TCP IP stack of the PC automatically groups output commands into packets The ETH32 will process all commands in each packet together as quickly as possible followed by a short gap until the next packet is received This test measures the maximum digital output burst rate that occurs as the ETH32 processes a single packet containing multiple output commands Digital Output Burst Rate 72 4 kHz 13 8 microseconds between writes 32 9 3 5 Command Latency Latency is the time from when an operation is initiated on the PC to when it takes effect on the ETH32 This test was performed by measuring the typical latency time of a
22. evices can be detected programmatically in your software using the ETH32 API v2 00 or later In either case in order for a PC to detect it the ETH32 must be on the same physical subnet as the PC Note that in many cases it is probably simplest to configure the ETH32 with static settings instead of using DHCP but both ways are available in order to best suit your needs 13 5 Software Installation The CD included with the ETH32 includes several useful resources ETH32 API library used for developing PC applications required for running the example programs Documentation ETH32 network configuration utility Example PC applications including source code 5 1 Windows Installation Windows users are encouraged to use the automatic installation program to install all of the available components on their system To do this simply run the eth32_install exe file located on the ETH32 product CD For those who may be wondering the only file that is installed into your system directory e g C Windows System32 is the core ETH32 API library eth32api d1l This is the only run time file required for applications that use the ETH32 API unless the applications are created with a Microsoft NET language in which case the Eth32 d11 NEI assembly is also required 5 2 Linux Installation Linux users are encouraged to run the install sh script to install the ETH32 API onto their system To do this follow these simple steps L
23. f the Analog 0 Analog 7 pins on the I O connector 4 2 5 Voltage Reference The ADC uses a reference voltage as the basis for each conversion it performs The reference voltage provided to the ADC represents the highest possible value for a reading In other words the readings are scaled so that a OV signal on an input channel will give the lowest reading 0 and an input voltage equal to the reference voltage will give the highest reading 1023 since the ADC is 10 bit The voltage reference may be configured for any of the following options Externally supplied voltage pin 23 on Connector B e Internal VCC 5V Internally generated 2 56V reference voltage CAUTION Whatever reference voltage is selected will be internally connected to the external voltage reference pin on Connector B Therefore you must ensure that this pin is not connected to anything if you select one of the internal voltage reference sources 10 4 3 Event Monitoring One powerful feature of the ETH32 is its ability to locally monitor inputs and notify one or more connected PCs when certain criteria are met This feature can in many cases eliminate the need for polling the ETH32 device Two significant advantages of this approach are the increased sampling rate the ability to catch shorter events and the decreased network traffic that would otherwise be used for polling In many cases this approach also provides a more convenient and intuitive structu
24. fully stored 19 7 Developing PC Applications The ETH32 device is controlled and utilized by PC applications that you develop and execute The versatility of the ETH32 coupled with the almost limitless control and response possibilities of a PC application creates a very powerful combination The ETH32 API provided by Winford Engineering gives your application a high level interface to the functionality of the ETH32 The API can be used from the following programming environments or compilers Microsoft Visual Basic 6 Microsoft Visual Basic NET Microsoft Visual CH NET Microsoft Visual C NET Microsoft Visual Studio C 4 or later Borland C Embarcadero C Builder MinGW GCC GNU GCC If a language or platform is used which is not directly supported by the ETH32 API it is also possible to control the ETH32 by directly communicating with its TCP IP port bypassing the API In other words your application can perform the tasks that the API would normally perform if so desired Details of the commands and responses are provided in the ETH32 Protocol Reference document Detailed documentation of the ETH32 API is included on the ETH32 product CD The documentation includes topical overviews requirements for the different supported languages and a complete function member reference for the supported languages 20 8 Hardware Information 8 1 Dimensions and Connector Locations La 6
25. h your preferred e mail address as well as a phone number where you wish to be reached This will help us get back to you in a timely fashion Technical Support Contacts Phone 1 989 671 9721 FAX 1 989 671 2941 E mail support winford com Winford Engineering Technical Support 4169 Four Mile Road Bay City MI 48706 3 Quick Start Guide If you are anxious to get up and running quickly then this section is for you This section explains how to connect the board configure it properly and run a simple demo program 1 PC Software Install the libraries and utilities from the product CD onto your computer if you haven t already Simply run the eth32_install exe file on the CD and select all available items to be installed You may see the Software Installation section on page 14 for further information 2 Connections For this simple demo only two connections are needed Connect the RJ45 ethernet jack to your ethernet network The ETH32 may be connected to a 10 Mbit second port 10BaseT or a 10 100 1000 Mbit sec port Connect power 3 ETH32 Configuration The ETH32 now ships with DHCP enabled If your network has a working DHCP server the ETH32 will automatically be assigned a valid IP address for your network Otherwise you can manually configure the ETH32 with IP address settings To do that be sure the ETH32 is connected to the same network as your PC and run the ETH32 network configuration application This is fo
26. kout Board for ETH32 The BRK WO breakout board is designed specifically for the ETH32 and brings all pins from both connectors out to convenient screw terminals In addition many extra screw terminal ground connections are available Handy reference information on various ETH32 I O pins is printed directly onto the board saving time and reducing wiring errors http www winford com products brkw01 php 37 10 2 2 General Purpose DB25 Breakout Boards These general purpose breakout boards bring each pin of a DB25 connector out to screw terminals They are available with male Part BRK25M or female Part BRK25F connectors installed and with either rubber feet or DIN rail mounting clips Since the ETH32 has DB25 female connectors the DB25 male breakout board BRK25M would typically be used so that a DB25 male female cable such as Winford Part EXT25 6 can be used to connect them http www winford com products brk25 php D 10 2 3 Slim Footprint DB25 Breakout Boards These slim form factor DB25 breakout boards offer the option of mounting a general purpose breakout board directly to the ETH32 without the use of a connecting cable They are available with both male BRKSD25M and female BRKSD25F connectors They can be purchased with jack screws or captive screws installed 38 h tzen winford com products brksd25 php Rb 10 3 Breadboard Adapters Winford Engineering also offers brea
27. microcontroller used on the ETH32 Therefore the ability of the counters to detect rising falling edges is not affected by network traffic the number of active connections or other resource usage 9 7 Pulse Width Modulation Outputs Two PWM Outputs Generated from 16 bit counter clocked at 2MHZ Base frequency range 30 5 Hz 65 535 counts 40 kHz 49 counts Duty period of each PWM output is independently configurable Base frequency is shared between outputs Duty period resolution varies depending on base frequency At the lowest frequency 30 5 Hz there are 65 536 possible duty period settings At the highest frequency 40 kHz there are 50 possible duty period settings 10 Appendix ETH32 Accessories A number of useful accessories are available for the ETH32 These can be seen and purchased on line at www winford com 10 1 Power Supply Winford Engineering s model WWD075 12 wall power supply is a suitable power supply for powering the ETH32 through its DC power jack http www winford com products wwd php 3 10 2 Breakout Boards Whether in the prototyping phase or permanent installation it can be very convenient to have all of the ETH32 pins available in the form of 36 screw terminals Winford Engineering offers several varieties of breakout boards for this purpose including a specialized board designed specifically for the ETH32 The various options are shown below 10 2 1 BRKW01 Deluxe Brea
28. n a Windows computer the configuration utility program will be available on the Start Menu at Winford ETH32 ETH32 Network Configuration if it was selected when running the installation program 15 6 2 1 Default Network Configuration The factory default network configuration settings for the ETH32 are as follows DHCP Enabled as of firmware v3 000 The static IP settings stored in the ETH32 have factory default settings as follows but note that these settings do not take effect as long as DHCP remains enabled IP Address 192 168 1 100 Subnet Mask 255 255 255 0 Gateway IP 192 168 1 1 If you need to disable DHCP and configure static IP settings you will need to configure the device as described below 6 2 2 Network Firewall Requirements The configuration utility must be run on a PC that is on the same network segment as the ETH32 device In other words there may be Ethernet hubs and or switches in between the PC and the ETH32 but there must not be any routers in between This is because the configuration utility uses UDP broadcast packets to detect and configure the ETH32 device s and broadcast packets are not forwarded by routers UDP broadcast packets are used because they allow the utility to communicate with any ETH32 device on the same network segment regardless of whether its currently configured IP address is appropriate for the network Note that this condition only applies to the configuration utility
29. nalog 1 3 Port 3 bit 2 Analog 2 4 Port 3 bit 3 Analog 3 5 Port 3 bit 4 Analog 4 6 Port 3 bit 5 Analog 5 7 Port 3 bit 6 Analog 6 8 Port 3 bit 7 Analog 7 9 Port 4 bit 0 10 Port 5 bit 0 11 Reset Active Low 12 Vcc 13 Vcc 14 Ground 15 Ground 16 Ground 17 Ground 18 Ground 19 Ground 20 Ground 21 Ground 22 Ground 23 Analog Voltage Ref 24 Power in unregulated 25 Ground The Reset signal pin 11 is internally pulled high to allow the ETH32 to function without any connection to the Reset line Pulling the Reset line low will reset the ETH32 and hold it in reset for as long as the line remains low 24 8 2 2 DC Power Jack The DC power jack accepts connectors with a 2 1mm inside diameter and 5 5mm outside diameter The jack requires a center positive supply See the Specifications section starting on page 29 for the acceptable voltage range POSITIVE fa eee NEGATIVE 8 2 3 RJ45 Ethernet Jack The ETH32 supports a 10Base T Ethernet connection to the RJ45 jack The jack is wired in the standard way for Ethernet network devices and requires no special cables The jack includes two LEDs which indicate network link status and network activity The green LED lights when the link is established The yellow LED lights when network activity is occurring It will light brightly when both transmit and receive traffic is occurring and dimly when only one or the other is occurring
30. nksys WET11 41
31. og in as root Depending on your system configuration you may need to mount the CD Run the following commands cd path to cd drive api linux install sh This script does not copy any example programs or documentation onto your system they are available directly from the CD For your information it performs these tasks 14 Copies the ETH32 API libraries libeth32 into usr lib Configures the symbolic links to the shared library these links are required for proper compile time and run time linking Copies the eth32 h header file into usr include 6 Network Connections and Configuration 6 1 Connecting the ETH32 to the Network The ETH32 connects to an Ethernet network just like any PC or network connected printer The Ethernet port uses 10Base T signaling which means it must be connected to a 10Base T or compatible for example 10 100 1000 port of your Ethernet hub or switch Like any Ethernet device the ETH32 may also be connected directly to a PC s Ethernet card using a crossover cable In a case where only two devices are required such as a PC and a ETH32 device a crossover cable eliminates the need for a hub or switch 6 2 Configuring the ETH32 Before beginning to use the ETH32 device you must configure its IP address and other network settings with values that are appropriate for your network These settings are configured over the Ethernet connection using the included utility program O
32. onnections Both counters are disabled and values set to zero PWM channels are disabled 12 4 9 TCP IP Connections The PC communicates with the ETH32 using the TCP IP protocol TCP IP is a standard robust time tested protocol used extensively on the Internet as well as local area networks TCP IP provides reliable delivery of data by automatically verifying the integrity of all data packets and buffering and retransmitting data in the event it becomes corrupted or lost The ETH32 supports multiple simultaneous TCP IP connections from one or more computers This allows a great deal of flexibility by allowing more than one application and more than one computer to monitor and or control the ETH32 at one time Each connection is allowed to individually select the event notifications it should receive this feature prevents unnecessary usage of network bandwidth and other resources 4 9 1 DHCP Support As of firmware version 3 000 the ETH32 includes support for obtaining an IP address Network mask and Gateway IP address settings from a DHCP server DHCP support can be disabled to use a static IP address Unless your DHCP server is configured to provide a specific IP address to an ETH32 you will need to determine which IP address has been assigned in order to connect to it with the applications you develop This can be done manually by detecting ETH32 devices with the ETH32 Configuration utility as discussed later Or ETH32 d
33. re for programming within your PC applications If there is ever a situation where polling is still preferred that approach can also be implemented either in place of or along with event monitoring As an example one very appropriate use of the event monitoring capability where polling would otherwise be used is the scenario of monitoring a pushbutton Event monitoring allows your PC application to be automatically notified each time the pushbutton is either pressed or released Event monitoring capabilities are included for digital I O ports 0 3 32 I O lines the analog channels and the digital counters Any or all of these events may be simultaneously enabled at any given time Please see the ETH32 API documentation for a complete explanation of the available events for digital inputs analog inputs and counters 4 4 Pulse Width Modulation PWM Outputs Two of the I O pins can function as Pulse Width Modulation PWM output signals These allow a configurable square wave output signal to be generated PWM outputs are often used for speed control as well as efficiently controlling LEDs relays and other loads Please see the Pulse Width Modulation Outputs section on page 36 for PWM output specifications Information on controlling the PWM outputs can be found in the ETH32 API documentation 4 5 Digital Counters The ETH32 contains two digital hardware counters Two of the ETH32 I O pins can function as inputs to the counters thus
34. single digital I O port write that is the time from when the write operation was initiated on the PC to when the voltage of the I O pins changed on the ETH32 Command latency typical 0 37 ms 9 3 6 Digital Events The digital I O ports are continuously polled internally by the ETH32 as quickly as CPU time allows These characteristics describe the rate at which the ETH32 is able to poll the I O ports in various scenarios Test scenario as follows e One connection active e One port event enabled Digital I O event polling rate 17 5 kHz average Test scenario as follows e ADC enabled e Five connections active All connections have port events enabled on ports 0 3 and analog events enabled on all channels of both analog event banks Digital I O event polling rate 6 0 kHz average Note that the above monitoring rates are on average meaning the amount of time between each sample can vary With no other activity the amount of time between each sample is quite consistent However incoming and outgoing data will introduce delays as this near worst case test scenario shows e ADC enabled e Five connections active 33 All connections have port events enabled on ports 0 3 and analog events enabled on all channels of both analog event banks One connection performing port write operations as fast as possible in this scenario about 8 200 per second This causes events to be fired on all connections although many are
35. ss Serial Firmware Version Allow Config DHCP Active Settings IP Netmask Gateway Stored Settings IP Netmask Gateway Choose the network interface of your PC to which the ETH32 is connected The appropriate broadcast address for that interface will be automatically determined and shown in the Broadcast Address box If your PC network has an unusual configuration that requires you to manually determine the broadcast address to which queries will be sent you may un check the Auto check box and manually enter a broadcast address On many PCs 255 255 255 255 will broadcast out on all network interfaces e Click the Find Devices button After a few seconds any ETH32 devices on the same network segment should be detected and displayed in the table similar to the following 17 ETH32 Configuration Main Advanced l Network Interface fioa 1 45 Local Area Connection Realtek RTL8139 810x Family Fast Ethernet NIC Packet Scheduler Miniport xl Help Broadcast Address Iw Auto Find Devices MAC Address Serial Number Configurable Device Information 00 D0 87 D3 10 03 _105 44004 3 000 Yes MAC Address 00 D0 B87 D3 10 D3 00 D0 87 D3 10 E9 10544005 2009 Yes No 101 18 Serial 105 AA004 Firmware Version 3 000 Allow Config Allowed DHCP Yes using DHCP Active Settings IP 10 1 1 52 Netmask 255 255 255 0 Gateway 10 1 1 1 Stored Settings IP 192 168 1 100
36. und at Winford ETH32 ETH32 Network Configuration on your Start Menu Assign the ETH32 an IP address that is available and valid on your network See the Network Connections and Configuration section on page 15 for more information 4 Run a Demo Program Run the LEDs example application This is found at Winford ETH32 gt Examples gt LEDs Example VB6 or LEDs Example C NET on your Start Menu If the ETH32 device is on the same network as your PC you can click the Detect button to populate the Combo Box with the IP address of any ETH32 device s on the network Otherwise you can type in the IP address you assigned to the ETH32 Click Connect A message box should appear letting you know that a connection to the ETH32 was successfully made Click OK to dismiss the message You may now check and uncheck the check boxes to turn the ETH32 s LEDs on and off This example program may be run on more than one computer simultaneously or more than one copy instance on a single computer Ifthe state of the LEDs is modified by another instance of the example program you may use the Refresh button to update the status of the check boxes to match the current state of the LEDs 4 Feature Descriptions 4 1 Digital I O Ports Digital I O ports are one of the simplest and most frequently used means of controlling monitoring and interfacing with other devices Each individual I O line on the ETH32 can be configured as an input
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