MODEL USB-CTR-15 USB Digital Counter/Timer
Contents
1. ACCES All PRODUCTS INC 10623 Roselle Street San Diego CA 92121 e 858 550 9559 e Fax 858 550 7322 contactus accesio com e _ www accesio com MODEL USB CTR 15 USB Digital Counter Timer Module USER MANUAL file MUSB CTR 15 B2 Notice The information in this document is provided for reference only ACCES does not assume any liability arising out of the application or use of the information or products described herein This document may contain or reference information and products protected by copyrights or patents and does not convey any license under the patent rights of ACCES nor the rights of others IBM PC PC XT and PC AT are registered trademarks of the International Business Machines Corporation Printed in USA Copyright 2005 2006 by ACCES I O Products Inc 10623 Roselle Street San Diego CA 92121 AIl rights reserved WARNING ALWAYS CONNECT AND DISCONNECT YOUR FIELD CABLING WITH THE COMPUTER POWER OFF ALWAYS TURN COMPUTER POWER OFF BEFORE INSTALLING A CARD CONNECTING AND DISCONNECTING CABLES OR INSTALLING CARDS INTO A SYSTEM WITH THE COMPUTER OR FIELD POWER ON MAY CAUSE DAMAGE TO THE I O CARD AND WILL VOID ALL WARRANTIES IMPLIED OR EXPRESSED Manual USB CTR 15 Warranty Prior to shipment ACCES equipment is thoroughly inspected and tested to applicable specifications However should equipment failure occur ACCES assures its customers that prompt service and support will be available All2. equipment originally manufactured by ACCES which is found to be defective will be repaired or replaced subject to the following considerations Terms and Conditions If a unit is suspected of failure contact ACCES Customer Service department Be prepared to give the unit model number serial number and a description of the failure symptom s We may suggest some simple tests to confirm the failure We will assign a Return Material Authorization RMA number which must appear on the outer label of the return package All units components should be properly packed for handling and returned with freight prepaid to the ACCES designated Service Center and will be returned to the customer s user s site freight prepaid and invoiced Coverage First Three Years Returned unit part will be repaired and or replaced at ACCES option with no charge for labor or parts not excluded by warranty Warranty commences with equipment shipment Following Years Throughout your equipment s lifetime ACCES stands ready to provide on site or in plant service at reasonable rates similar to those of other manufacturers in the industry Equipment Not Manufactured by ACCES Equipment provided but not manufactured by ACCES is warranted and will be repaired according to the terms and conditions of the respective equipment manufacturer s warranty General Under this Warranty liability of ACCES is limited to replacing repairing or issuing credit at ACCES discretion
3. O for event counting Mode 3 Sguare Wave Generator This mode operates like mode 2 The output is high for half of the count and low for the other half If the count is even then the output is a symmetrical square wave If the count is odd then the output is high for N 1 2 counts and low for N 1 2 counts Periodic triggering or frequency synthesis are two possible applications for this mode Note that in this mode to achieve the square wave the counter decrements by two for the total loaded count then reloads and decrements by two for the second part of the wave form Mode 4 Software Triggered Strobe This mode sets the output high and when the count is loaded the counter begins to count down When the counter reaches zero the output will go low for one input period The counter must be reloaded to repeat the cycle A low gate input will inhibit the counter Mode 5 Hardware Triggered Strobe In this mode the counter will start counting after the rising edge of the trigger input and will go low for one clock period when the terminal count is reached The counter is retriggerable The output will not go low until the full count after the rising edge of the trigger Manual USB CTR 15 16 Chapter 7 Connector Pin Assignments A 50 pin connector provided on the back plate of these boards for I O connections Connector pin assignments are listed below IDC 50 Pin Header Male 1 49 O2200000O000002O0O0000000OOOO0O 50 0ooo0000002
4. comes configured in an optimal module for use as event counters freguency output pulse width and freguency measurement See Block Diagram Each counter can be programmed to any count as low as 1 or 2 and up to 65 536 depending on the mode chosen For those interested in more detailed information a full description can be found in the Intel or eguivalent manufacturer s data sheet provided in the chipdocs directory on the Software Master CD Refer to Chapter 5 Programming and the html Driver Manual document installed by the Software Master CD for information on using the installed software driver for this board The following data is provided only for reference as it is unlikely to be needed when using the provided driver Please note the block diagram description of how the 9 pins associated with 8254 counters are configured into an optimum counter timer module on this board In addition the driver and firmware on the board requires a full 16 bit load operation do not select Iow byte only or high byte only modes for the counters Additional low level information on the 82C54 can be found on the Software Master CD in the chipdocs directory Operational Modes The 8254 modes of operation are described in the following paragraphs to familiarize you with the versatility and power of this device For those interested in more detailed information a full description of the 8254 programmable interval timer can be found in the
5. the board is successfully connected to the computer and has been detected and configured by the operating system When the LED flashes continuously this signifies that there is data being transmitted over the USB bus Manual USB CTR 15 DC Power Jack Optional Please note not all boards will contain this option This is an option for high current applications when more current is needed than what your computer can provide on the USB port typically 500 mA The DC jack has a 2 00mm post on board and is designed to be used with the 9 VDC AC DC external power supply that ships with this option The voltage regulator on board regulates the 9 VDC and provides 5 VDC to the onboard circuitry When using external power switch the jumper located near the USB connector to VEXT otherwise when the jumper is in the VUSB position current is drawn from the USB port please consult the option selection map for a visual reference 50 Pin Box Header The 50 pin box header has standard 100 spacing between pins and is keyed to prevent improper connections It can be used with standard IDC type ribbon cables or the screw terminal board that plugs directly into the header As shown in the Option Selection drawing this board contains two 50 pin connectors P2 and P3 The right angle connector called P2 is designed to connect to your field cabling This connector fits through the aperture in the standard enclosure and is therefore available cleanly fro
6. ug aaea ASENU 10 Figure 3 2 User Configuration Adaptor ccccssseecssseecsseeeeesseseeseesenseesenneesensensonsees 10 Figure 3 3 User Configuration Adaptor cccccesseessseecesseecesseeceneesenseesenseesensessoneees 11 Default Configurauion Adapte EE 11 Chapter 4 USB Address Information cccccssseeeeseeeeeneeseeseesenseeeeeseeceaseeeeasesonseesenseesonnees 12 Chapter 5 Prodi ANI Gy BEEN 13 Table 5 1 8254 index number scheme MaD cccceesceeeeeceeseeeneeeenseeeeeeeeneeeeaeeneneenenees 13 LOW Level RefeT6nC amp E 14 Vendor Request 20h Counter Redui a a adaa aaaea 14 Vendor Request 21h Counter ModE isss aaa aaa 14 Vendor Request 22h Counter Load ccsccceeseceeseeeeseeeeseeeeseeeeseeeseeoeseeeenseoeneeoeseeseneesenees 14 Vendor Request 23h Counter Mode Load or Read Mode Load 14 Table 5 2 Counter Mode Control Byte cccssseccesseeeeeseecenseeeenseseeneeeeeseesenseesensessones 14 Chapter 6 3254 Counter TIm E 15 Operational Niege 15 Mode 0 Pulse on Ferraris ebe 15 Mode 1 Relriggerable One Shot sicseseavccscjecvscsescsevecedesseoseicsvanswscsnnooesenvaccwiccvanawacavaosancwacdwecn 15 Mode 2 Rate Generator sosi a a a Aa EEEE a 16 Mode 3 Square Wave Generator cccccssseccsssecceneeeceneeseeneesenseeseeseesenseesenseseeneesensessennesees 16 Mode 4 Software Triggered KE dd e EE 16 Mode 5 Hardware Triggered Strob
7. 000000000000000O 2 Din Function Pin Function 6 Timer Output 10 1 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 44 46 Table 7 1 50 Pin Connector Pin Assignments Note Gate and Clock inputs are pulled up through 10k resistors Manual USB CTR 15 17 Customer Comments If you experience any problems with this manual or just want to give us some feedback please email us at manuals accesio com Please detail any errors you find and include your mailing address so that we can send you any manual updates MmACCES I O PRODUCTS INC 10623 Roselle Street San Diego CA 92121 Tel 858 550 9559 FAX 858 550 7322 www accesio com Manual USB CTR 15 18
8. Hz Please note CTR_StartOutputFreg assumes the Standard Configuration Adaptor is installed and may therefore not be useful in your application Manual USB CTR 15 13 Low Level Reference Please note this information is very low level and is generally only of use when writing code for operating systems for which we do not yet provide a high level driver Feel free to skip the rest of this chapter if it doesn t apply to your application In addition to the Windows driver provided above the USB bus provides a lower level alternative method of interfacing with the board USB defines several standard operations one of which Vendor Request is used by this board to control all Counter related functionality Each USB vendor request has two word size parameters Value and Index plus a lengthed data buffer that can be written to the board or read from the board The following Vendor Reguest Codes are used by this board Vendor Request 20h Counter Read This request reads the current value in the specified counter Value The low byte is the index of the 8254 from 00h to 04h The high byte is the index of the counter from 00h to 02h Note that the high byte is not a mode control byte Index Reserved use 0000h Data Read 2 bytes the current value in the counter Vendor Request 21h Counter Mode This request puts a counter in the specified mode but does not load a load value This can be useful for setting the output va
9. Intel or eguivalent manufacturers data sheets The following conventions apply for use in describing operation of the 8254 Clock A positive pulse into the counter s clock input Trigger A rising edge input to the counter s gate input Counter Loading Programming a binary count into the counter Mode 0 Pulse on Terminal Count After the counter is loaded the output is set low and will remain low until the counter decrements to zero The output then goes high and remains high until a new count is loaded into the counter A trigger enables the counter to start decrementing Mode 1 Retriggerable One Shot The output goes low on the clock pulse following a trigger to begin the one shot pulse and goes high when the counter reaches zero Additional triggers result in reloading the count and starting the cycle over If a trigger occurs before the counter decrements to zero a new count is loaded This forms a retriggerable one shot In mode 1 a low output pulse is provided with a period equal to the counter count down time Manual USB CTR 15 15 Mode 2 Rate Generator This mode provides a divide by N capability where N is the count loaded into the counter When triggered the counter output goes low for one clock period after N counts reloads the initial count and the cycle starts over This mode is periodic the same seguence is repeated indefinitely until the gate input is brought low This mode also works well as an alternative to mode
10. e cccsssccsssseecesseecenseecenseeeenseeeenseseeseesoeneesenseesensesses 16 Chapter 7 Connector Pin Assignments cccssseeceeseecesseeeenseeeeneeseneesoeneesoseesonseesenseesoneees 17 Table 7 1 50 Pin Connector Pin Assignments ccceeeeeeeeeneeeeeneeeeeneeeeeneeeeeneeeeaneeeeaes 17 CUStormer COMMENTS sisis rae ENAA AOA EErEE Eaa 18 Manual USB CTR 15 Chapter 1 Introduction Features Fifteen 16 bit Counter Timers 5 x 8254 High speed USB 2 0 device USB 1 1 backwards compatible User Wiring Adaptor card provided for flexible yet easy counter concatenation Standard Configuration Adaptor pre configured for event counting freguency measurement pulse width measurement or freguency generation Power provided via USB cable Resettable fused 5VDC output Standard 50pin IDC type connector with key Screw Terminal board enables quick connection of signals prior to cable harnessing PC 104 size 3 550 by 3 775 in Rugged industrial enclosure Applications Event counting Frequency measurements Position measurement Pulse counting Pulse width modulation Pulse generation Home Portable Laptop Education Laboratory Industrial Automation Embedded OEM Functional Description This USB board is an ideal solution for adding portable easy to install counter timer capabilities to any computer with a USB port The board is a USB 2 0 high speed device offering the fastest speed available with the USB bu
11. e on screen prompts to install the software for this board Leave the CD in the drive as it may be needed for driver installation once you plug the hardware into the USB port Installing the Hardware Before installing the adapter carefully read the OPTION SELECTION section of this manual and configure the adapter according to your requirements In Windows the SETUP EXE program will lead you through the process of setting the options on the board The setup program does not set the options These must be set manually by jumpers on the board within the case of the adapter Manual USB CTR 15 Chapter 3 Hardware Details Option Selections Refer to the setup programs on the CD provided with the board Also refer to the Block Diagram and the Option Selection Map when reading this section of the manual 3 Pj D S 3 775 0 20 O Pin 1 P3 ci USB LU y aN VUSB VEXT VEXT VUSB POWER FROM USB USE DC OPTION P T O 0 20 0 20 a o 0 20 Figure 3 1 Option Selection Map USB Connector The USB connector is a Type B USB connector and mates with the cable provided The USB port provides communication signals along with 5 VDC power The board can be powered from the USB port or if needed for higher current applications an external power supply can be used LED The LED on the front of the enclosure is used to indicate power and data transmissions When the LED is in an illuminated steady green state this signifies that
12. for any products which are proved to be defective during the warranty period In no case is ACCES liable for consequential or special damage arriving from use or misuse of our product The customer is responsible for all charges caused by modifications or additions to ACCES equipment not approved in writing by ACCES or if in ACCES opinion the equipment has been subjected to abnormal use Abnormal use for purposes of this warranty is defined as any use to which the equipment is exposed other than that use specified or intended as evidenced by purchase or sales representation Other than the above no other warranty expressed or implied shall apply to any and all such equipment furnished or sold by ACCES Manual USB CTR 15 Table of Contents Chapter 1 Inuscgduc Holl eu eu meme a ert TOEAU UA GEORGE Dn ORDD 5 LM ere 5 PAD DING AMON E 5 FUncuHOnal DESCHDUOD NEE 5 Figure 1 1 BIOCK DIAG Ia isie oeu ey Caeau ou onau ee eee ee eens 6 EEGENEN 6 Oe e OK ee de EE 7 included Wih your DOOFd EE 7 ODIOnal ACCeSSOIOS eebe 7 N T ae E TE d E 8 Software CD Installation E 8 JEC OU teil ET 8 Chapter 3 Hardware Detalls eU Y et dU a GNU eine eens 9 KEE 9 Figure 3 1 Option Selection d e E 9 USB COnnectOl 2xuse ieu O he GYN AEEA EE 9 UD FEST FAYN ER EEDD FE HD FA PEN DF DY EY AH FWY FY HYD ebe 9 DC Power Jack Ep ett eege eege ege ee eege ee Eege 10 50 Pin BOX nr 1 gy FD OH I DEFN O HN FON EFE FN EFO YY 10 User Configuration Adapte i ioi
13. le please contact us for details Included with your board The following components are included in your shipment Please take the time now to ensure that no items are damaged or missing USB Counter Timer Module installed in enclosure if not OEM Option Screw Terminal Accessory not included with the E Option Software Master CD USB I O Guick Start Guide 6 foot USB 2 0 cable User Wiring Adaptor Standard Configuration Adaptor Optional Accessories The following accessories are available that are compatible with this Counter Timer Module e Ribbon Cable Assembly various lengths from 12 to 10 feet e Screw Terminal Board can be mounted on DIN rail e DIN rail Snap Track Manual USB CTR 15 Chapter 2 Installation A printed USB I O Guickstart Guide is normally included and packed with your hardware for shipment It provides all the straight forward steps necessary to complete your software and hardware installation Software CD Installation The software provided with this board is contained on one CD and must be installed onto your hard disk prior to use To do this perform the following steps as appropriate for your operating system Substitute the appropriate drive letter for your drive where you see d in the examples below WIN99 Me 2000 XP 2003 1 2 3 4 Place the CD into your CD ROM drive The install program should automatically run If not click START RUN and type click OK or press Follow th
14. lue of the counter without actually making it count Mode O sets the output low mode 1 sets it high Value The low byte is the index of the 8254 from 00h to 04h The high byte is for mode control Index Reserved use 0000h Data None Vendor Request 22h Counter Load Value The low byte is the index of the 8254 from 00h to 04h The high byte is a mode control byte but only bit 7 and 6 are significant this function will ignore the other bits Index The load value from 0 to 65535 Data Read None Vendor Request 23h Counter Mode Load or Read Mode Load This request puts a counter in the specified mode then loads it with the specified load value It can optionally read the current value in the counter before moding it See the chapter on the 8254 counter timer for details on the various modes the bits shown in the table below as 1 need to remain set Value The low byte is the index of the 8254 from 00h to 04h The high byte is the mode control byte Index The load value from 0 to 65535 Data Read Either none or 2 bytes If 2 bytes are read as part of the request they will be set to the current value of the counter before the mode Bit 7 6 5 4 3 2 1 O Counter Index 0 2 Counter Mode 0 5 ER Table 5 2 Counter Mode Control Byte Manual USB CTR 15 14 Chapter 6 8254 Counter Timer This board contains five 82C54 counter s that each include three 16 bit counter timers The default configuration adaptor
15. m outside the steel enclosure The other 50 pin header called P3 has an identical pinout but is not designed for cables Rather it is intended that P3 will be used to interconnect the various onboard counters User Configuration Adapter To assist you in wiring the counters together a small PCB is provided called the User Configuration Adaptor This Adaptor is for you to wire the counter arrangement you need As shown in the following drawing two through hole 0 1 spacing solder pads are provided for each signal from each counter along with a mating 50 pin header By connecting wires between holes you can create a permanent wiring adaptor plug that installs into P3 and creates the counter wiring scheme your application needs This User Configuration Adaptor eliminates the need for complex wiring harnesses at P2 and increases the reliability of your system 5 Volts via pull up resistor 5 Volts fused 0 5A Figure 3 2 User Configuration Adaptor Manual USB CTR 15 10 8254 0 10 MHz gt CTR2 Bees ag a CTR 3 3 CTR4 AERA Ra CTR5 8254 2 _8254 2 CTR6 na s CIR 5 CTR8 S CTR TR 1 CTR 1 co N GA E H Gi H S CTR 12 a lt CTR 13 CTR 14 4 er a Figure 3 3 User Configuration Adaptor Default Configuration Adapter In addition to the User Configuration Adaptor a pre wired Default Configuration Adaptor is also provided This small PCB does not incl
16. s It is fully compatible with both USB 1 1 and USB 2 0 ports The card is plug and play allowing quick connect disconnect whenever you need additional I O on your USB port The board features 5 fully undedicated industry standard 82C54 counters The I O wiring connections are via an industry standard 50 pin connector or via a terminal block adapter board For external circuits fused 5VDC power is available at the connector The resettable fuse is rated at 0 5A In addition to 5V power a 10MHz output signal provides a reliable timebase for many applications The board is designed to be used in rugged industrial environments but is small enough to fit nicely onto any desk or testing station The card is PC 104 size including the proper mounting holes and ships inside a steel powder coated enclosure with an anti skid bottom Manual USB CTR 15 USB 1 1 2 0 INTERFACE WITH MICRO CONTROLLER USB BUS INDUSTRY STANDARD 50 PIN IDC HEADER CONNECTOR ONBOARD USER WIRING PLUG CONNECTOR PI IIN7 7NZ UT TW 10 MHz L Figure 1 1 Block Diagram Ordering Guide e USB CTR 15 Enclosure module and screw terminal board e USB CTR 15E Economy model no screw terminal board e USB CTR 15 OEM Board only no enclosure or screw terminal board e MP104 DIN DIN rail mounting provision Manual USB CTR 15 Model Options e P External power and 120VAC 9VDC adapter e RoHS A RoHS version of this product is availab
17. ude room for user wiring connections instead it comes pre wired into a very efficient counter scheme wherein each 8254 three counters is configured for common counter timer tasks The drawing to the right shows the block diagram for this Default Configuration Adaptor Much of the software provided assumes this default configuration adaptor has been installed at P3 Manual USB CTR 15 1 kuch Chapter 4 USB Address Information Use the provided driver to access the USB board This driver will allow you to determine how many supported USB devices are currently installed and each device s type This information is returned as a Vendor ID VID Product ID PID and Device Index The board s VID is Ox1605 and its PID is Ox8020 The Device Index is determined by how many of the device you have in your system and provides a unigue identifier allowing you to access a specific board at will Manual USB CTR 15 12 Chapter 5 Programming This board contains Five 8254 chips Each 8254 contains 3 16 bit counter timers and a single control register This effectively provides 15 individual 16 bit down counter timers but only 5 control registers Because of this the counters are referenced by two methods 8254 number counter index or counter number In the software you will normally use 8254 number counter index but it is usually more convenient to use counter number for hardware and wiring considerations The following table sho
18. ws the mapping between these two number schemes counter number 9254 number counter index 7 43 45 Table 5 1 8254 index number scheme map 8254 number counter index_ counter number _ _0 0 0 Klee le O0 EE WC Wee Oe a ee ee eee eee ey ee ee ee ee 2 WC S O0 95 41 0 _ 02 DA The driver software provided with the board uses a 32 bit dll front end compatible with any Windows programming language Samples provided in Borland C Builder Borland Delphi Microsoft Visual Basic and Microsoft Visual C demonstrate the use of the driver The following functions are provided by the driver in Windows These functions will allow you to operate the counter timer functionality and board level functions For detailed information on each function refer to the html Driver Manual located in the Win32 directory for this board unsigned long GetDevices void unsigned long GueryDevicelnfo Devicelndex pPID pName pDIOBytes pCounters unsigned long DIO_Configure Devicelndex bTristate pOutMask pData unsigned long CTR_8254Mode Devicelndex Blocklndex Counterlndex Mode unsigned long CTR_8254ModeLoad Devicelndex Blocklndex Counterlndex Mode LoadValue unsigned long CTR_8254ReadModeLoad Devicelndex Blocklndex Counterlndex Mode LoadValue pReadValue unsigned long CTR_8254Read Devicelndex Blocklndex Counterlndex pReadValue unsigned long CTR_StartOutputFreg Devicelndex Counterlndex p
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