PC Watchdog™ Hardware User`s Manual
Contents
1. Not Used Bits Notes The data byte in the send command 0x5D is a bit field defined as D0 Di D2 D3 D4 D5 D6 D7 Set to one 1 for a 2 5 second beep after each reset evaluated first Set to one 1 for a continuous buzzer after the first reset Note that this could be very annoying Set to one 1 to turn on the buzzer Method for user application to sound buzzer Set to one 1 to turn off the buzzer evaluated last Also for a user ap to turn off the buzzer Not used write zeros for future compatibility Not used write zeros for future compatibility Not used write zeros for future compatibility Set to one 1 to store in non volatile memory the beep time set in DO or D1 This will be effect every time the board powers up If DO and D1 are clear the non volatile memory will be cleared Bits are evaluated starting with DO first Example if you set both D2 and D3 the result will be that the buzzer 15 off 23 The data byte in the command response 0x5C or 0x5D is also bit field defined as D0 DI D2 D3 D4 D5 D6 D7 Set to one 1 means buzzer is was set for 2 5 second beep Set to one 1 means buzzer is was set for continuous beep Set to one means buzzer is was on Set to one means buzzer is was off Not used read zeros for future compatibility Not used read zeros for future compatibility Not used read zeros for future compatibility Set to one 1 means a n2. or by a user program If the watchdog board is receiving re triggers then it will flash the bottom LED for 100 milli seconds during each second 5 2 D2 USB Active This surface mount LED is located next to the USB socket on the board This LED will flash rapidly when you first plug in the USB to indicate the enumeration process After the device has been configured then this LED may flash to indicate USB activity 5 3 Buzzer There 15 a buzzer installed on the board When the first temperature trip occurs the buzzer will beep When the second trip point occurs the buzzer will be on continuously The buzzer will sound briefly when the board resets the PC and when the board powers up If the board has a power up problem it will emit another long 1 second beep 6 Watchdog Drivers Programs and Please check the CD for recent updates in the readme txt file The PDF manuals are in the Manuals directory on the CD The new DLL API and sample cpp code is in the NEW DLL ConsoleTestAp directory on the CD There is a new C Console Ap provided that shows how to interface with the new DLL There is also a new VB Net directory with sample code for using Visual Basic to access the board through the DLL There is the older unsupported software on the CD for Win 98 ME 2000 6 1 Web Site Downloads The latest versions of sample code DLL Documents etc can be found on our site at http www berkprod com These downloads are ZIP files
3. 0x15 Delay Time Delay Time WDog Responses BYTE 0 RESP BYTE 1 MSB Byte 2 LSB 0x14 Delay Time Delay Time 0x15 Not Used Not Used Notes If the time read is 0x0000 using command 0x14 then there is not a new Arm time in the non volatile memory The new Arm time can range from 0x0001 to OxFFFF seconds If the value is set to zero 0x0000 on command 0x15 write then any Arm time in non volatile memory will be erased and the board will go back to using the 2 5 minute delay A non zero value will be stored and then used as the Arm time on future resets and power on Be careful not to make it too short 16 8 8 Commands 0x18 amp 0x19 Read Write Current Watchdog Time When you use the Watchdog for the first time it will use a countdown time set by the DIP switches section 4 4 or it will use a stored value if programmed This command allows you override the switch or stored setting to shorten or lengthen the delay See the next section for storing a new delay time Send Commands BYTE 0 CMD BYTE 1 MSB Byte 2 LSB 0x18 Not Used Not Used 0x19 Delay Time Delay Time WDog Responses BYTE 0 RESP BYTE 1 MSB Byte 2 LSB 0x18 Delay Time Delay Time 0x19 Not Used Not Used Notes The delay time can range from 0x0001 to OxFFFF seconds A value of zero 0x0000 allows you to return to the time set on the DIP switch or the stored value in non volatile memory if it exists The new time will be activated at the next re trigger of th
4. 3 COMMAND 0x04 GET STATUS INFORMATION ccssscsccccccccccccsscsssccsccccccccccecessscessceccccccsececessscecccecessesscccececessseneees 13 8 4 0x08 GET FIRMWARE VERSION NUMBER ccccccsssssssssssccccccccccccccsssssssccccccccccccccccccssssssscccccccsssssccssccees 14 8 5 COMMAND 0 0 SWITCH SETTINGS cccccccccsssssssssscccsccccccccccecsssscsccccccesesessecscccccsessscesccccscessssencsoeees 14 8 6 0x10 amp 0x11 READ WRITE CURRENT ARM 50 1 15 8 7 0x14 amp 0x15 READ SAVE NON VOLATILE ARM TIME eee eee eee eene eee nennt 16 8 8 0x18 amp 0x19 READ WRITE CURRENT WATCHDOG TIME eee 17 8 9 0 READ HOLDING REGISTER WATCHDOG TIME eee ee eee ee eee eee enne tense nettes aset ee eee eee esee eee 18 8 10 Commanpns 0 1 amp 0 1 READ SAVE NoN VoLATILE WATCHDOG TIME eee eee eee ee 19 8 11 COMMAND 0x20 READ RE TRIGGER COUNT ee eee eee eee eene eee oett eese sensa aste nasse eee eee sesa asses eese 20 8 12 0x30 ENABLE DISABLE WATCHDOG eee eee eee eee nonna nate eto 20 8 13 0x50 amp 0x51 READ WRI
5. found to comply with the limits for a Class A computing device in accordance with the specifications in Subpart J of Part 15 of FCC rules which are designed to provide reasonable protection against such interference in a commercial installation If this equipment does cause 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 the receiving antenna Relocate the computer with respect to the receiver Move the computer away from the receiver Plug the computer into a different outlet so that the computer and receiver are on different branch circuits e Consult the dealer an experienced radio TV technician for help 12 2 CE The Internal Serial PC Watchdog has successfully passed all appropriate tests that are necessary for its certification under EMC directive 89 336 EEC 32
6. the operation of the relay at power up and save the setting When the relay is inverted it will be turned on within a few hundred milli seconds of the PC being powered on Send Commands BYTE 0 CMD BYTE 1 MSB Byte 2 LSB 0x50 Not Used Not Used Ox51 Not Used Bits WDog Responses BYTE 0 RESP BYTE 1 MSB Byte 2 LSB 0x50 Not Used Bits 0x51 Not Used Bits Notes The data byte in the send command 0x51 is a bit field defined as D0 Setto one 1 to turn relay on D1 Ifsetto one the auxiliary relay will pulse for the same length of time as the reset relay see command 0x88 This option will be stored in non volatile memory D2 Ifsetto one the auxiliary relay will latch on after the first watchdog reset and stay on You can turn off the relay with bit DO This option will be stored in non volatile memory D3 6 Not used write zeros for future compatibility D7 Setto one 1 to store relay inversion setting in non volatile memory Relay will turn on a few hundred milli seconds after the PC powers up This 15 only done at power up You can turn the relay off with bit DO Setting bit D1 will also turn the relay off after the first watchdog reset The data byte in the command response 0x50 or 0x51 is also a bit field defined as DO Set to one 1 means auxiliary relay is on 01 Auxiliary relay set for pulse at watchdog reset D2 Auxiliary relay set for latch on at watchdog reset D3 6 Not used read zeros for
7. time can range from 0x0001 to OxFFFF seconds If the value is zero 0x0000 on command Ox1D then any watchdog time in non volatile memory will be erased and the board will go back to using the DIP switch settings A non zero value will be stored and then used as the watchdog time on future resets and power ups The new time will also be activated next time the watchdog board is re triggered 19 8 11 Command 0x20 Read Re trigger Count Every time the watchdog gets re triggered by the re trigger command 0x02 it will increment a 16 bit counter This command allows you to read the counter If you set the flags in the LSB to a non zero value then the counter will be cleared after the value has been returned Send Command BYTE 0 CMD BYTE 1 MSB Byte 2 LSB 0x20 Not Used Flag WDog Response BYTE 0 RESP BYTE 1 MSB Byte 2 LSB 0x20 Count MSB Count LSB 8 12 Command 0x30 Enable Disable Watchdog When this command is received it will disable the watchdog if the is 0x A5 and the LSB ix 0xC3 If you send any other values then the watchdog will be enabled The flag returned will be non zero if the watchdog is enabled Send Command BYTE 0 CMD BYTE 1 MSB Byte 2 LSB 0x30 0xA5 0xC3 WDog Response BYTE 0 RESP BYTE 1 MSB Byte 2 LSB 0x30 Not Used Flag 20 8 13 Commands 0x50 amp 0x51 Read Write Relay Control This command provides a method to control the auxiliary relay on the board You can also invert
8. CMD BYTE 1 MSB Byte 2 LSB 0x0C Not Used Not Used WDog Response BYTE O RESP BYTE 1 MSB Byte 2 LSB 0x0C Not Used Bits 14 8 6 Commands 0x10 amp 0x11 Read Write Current Arm Time When you use the Watchdog for the first time it will wait 2 5 minutes or it may use a programmed value after a power up or a reset before it arms itself This allows the PC additional time to complete a reboot sequence These commands allow you to check and shorten lengthen the current delay See the next section for storing a new wait time Send Commands BYTE 0 CMD BYTE 1 MSB Byte 2 LSB 0x10 Not Used Not Used 0 11 Delay Time Delay Time WDog Responses BYTE 0 RESP BYTE 1 MSB Byte 2 LSB 0x10 Delay Time Delay Time 0 11 Not Used Flag Notes The delay time sent can range from 0x0000 to OxFFFF seconds If the time is less than the current remaining wait time then the arming will occur sooner The board will return a flag byte after a write operation The flag will be zero if the board is already passed the power on delay and is armed This command is only active for the current session and the board will revert to its programmed delay at the next reboot 15 8 7 Commands 0x14 amp 0x15 Read Save Non Volatile Arm Time This command allows you to shorten or lengthen the delay after every reboot by saving the value in non volatile memory Send Commands BYTE 0 CMD BYTE 1 MSB Byte 2 LSB 0 14 Not Used Not Used
9. IP Switches and enable up to two independent operating modes These modes can both be active at once They are e Passive Mode monitors the USB bus for 32mS polling interrupt transaction Please note that this mode is no longer recommended e Active Mode requires that the host communicate with the board via direct communications on a regular basis Additional Switches are used to set the timeout period and temperature mode If no activity 18 detected in Passive or Active Mode by the time the Watchdog timer expires the PC Watchdog will start its reset sequence on the PC The two LEDs on the Watchdog are used for status indication The top LED provides the arming status of the Watchdog by varying the rate at which the LED flashes When the Watchdog resets the PC it will turn on the bottom LED and leave it on which provides an indication that at least one Watchdog reset has occurred possibly more In Active Mode the PC can turn this LED off and also get a count of the number of resets that have occurred The bottom LED will also flash on or off once per second for a tenth of a second if a Watchdog timer reset event occurred in the prior second Note If you stop your application program or you reset the PC with CTL ALT DEL then be sure to disable the Watchdog by unplugging the reset cable or remove power by disconnecting he USB cable Otherwise it may count down and reset your PC at an inopportune time The temperature circuit
10. TE RELAY CONTROL e eee eee eere eee esee essa 21 8 14 0x58 amp 0x59 READ WRITE TEMPERATURE OFEFSET ee eee eene eene eene ettet 22 8 15 0 5 amp 0 5 READ WRITE BUZZER CONTROL ee eeee eese 23 8 16 COMMAND 0x80 RESET d ORC 25 8 17 0x84 GET CLEAR RESET COUNT eene ee eee eee eee eee 26 8 18 0x88 amp 0x89 WRITE RESET RELAY 15 27 8 19 0 0 amp 0 READ WRITE USER ID 1 28 8 20 INVALID COMMANDS 6597s 6e posae a ca bo R on sae eo eee pea ora oa ouscsaccedeneseecseceaseseossasstecees soeensssepebososesaosees 28 8 21 Sreca DracNosrics OXEO ro OXFF Do Nor USE eee eene ee eee eee enne eaae eee eta setas etta esten se ease tease teaa 28 9 APPENDIX A SPECTEICA TIONS eee eei io s oe etn si Eno Ioann aae eaae aoa oou 29 10 2566 ae eu
11. Temp Re trigger Watchdog No 1 00 0x04 Get Status Information No 1 00 0x08 Get Firmware Version No 1 00 0x0C Get Dip Switch Settings No 1 00 0x10 Read Current ARM Time No 1 00 0x11 Vrite Current ARM Time No 1 00 0x14 Read Non Volatile Arm Time No 1 00 0x15 Vrite Non Volatile Arm Time Yes 1 00 0x18 Read Current Watchdog Time No 1 00 0x19 Vrite Current Watchdog Time No 1 00 Ox1A Read Hold Register Watchdog Time No 1 45 Ox1C Read Non Volatile Watchdog Time No 1 00 0 1 rite Non Volatile Watchdog Time Yes 1 00 0x20 Read Re trigger Count No 1 00 0x30 Enable Disable Watchdog No 1 00 0x50 Read Relay Control No 1 35 0x51 irite Relay Control Yes 1 35 0x58 Read Temperature Offset No 1 00 0x59 rite Temperature Offset Yes 1 00 0 5 Read Buzzer Control No 1 40 0x5D Vrite Buzzer Control Yes 1 40 0x80 Reset PC No 1 00 0x84 Get Clear Reset Count No 1 00 0x88 Read Reset Relay Pulse Width No 1 00 0x89 Vrite Reset Relay Pulse Width Yes 1 00 0 0 Read User ID Data No 1 00 0 1 rite User ID Data Yes 1 00 Note 1 Commands 0x50 amp 0x51 use bit fields Some bits were added to firmware version 1 35 The NV column tells you if the command will write data to the non volatile memory and thus will take longer to execute Allow 100mS milli seconds for the board to process a normal command and allow up to 200mS for a non volatile memory write command 10 The Version VER column tells you what firmware version your board should have to sup
12. USB PC Watchdog Hardware User s Manual Berkshire Products Inc Phone 710 271 0088 http www berkprod com Rev 2 01 Copyright 2001 2009 PC Watchdog is a registered trademark of Berkshire Products Table of Contents INTRODUGCT ION iiie coo eic oos sa ta oos e o o os eoa aaa eoo ee aaa e ate on es ea eae anno o epos eae ao ae ooa 1 2 OPERATION ese scusa aes ae Eod 2 3 SUPPLIED COMPONENTS ori bsc 3 3 1 INSTALLATION OF SUPPLIED COMPONENTS e e eee eee tete teet esee esses ssa sete ee ess sees sete ee een sese see eoe 3 3 2 AUXILIARY RELAY sesesosevesssecsssases 3 3 3 USB Rev B INTERNAL CONNECTION HEADER eee 4 3 3 T INTERNAL MOUNTING ss AEE 4 4 DIP SWITCHESETTINGS tesa aacra cedo ae caosa eaa a ossa Ve a cosa sn ee Nana 5 4 1 SwircnES SWS SW2 i cccsssscceccsssovsscccscocsccsnssbsouscesoocosocscssesssc edcscosd estebesesseccssobecvoscdsedccsvecssccassesedstessees 5 4 2 PASSIVE SW 5 4 3 ACTIVE W 2 5 4 4 BUZZER DISABLE S W3isicissesdacvedessvevec
13. d Mode section for further information This mode will require the user to integrate support software into their application program 4 4 Buzzer Disable SW3 If this switch is on the buzzer will be disabled The board must have firmware version 1 30 or higher for this switch option 4 5 Over temp Reset SW4 If this switch is on then the Watchdog will reset and hold the reset on a PC during an over temp condition The first trip point is 46 115 F at which point the buzzer will start to sound The second trip point where the Watchdog can reset the PC is 56 C 133 F If the Watchdog resets the PC it will remain in reset until the temperature drops back below 50 C 122 F There is a software option to allow shifting the trip points higher via software control The trip points can be increased in 1 increments up to 77 C 171 F and 87 189 F 4 6 Power On Delay POD Extend SW5 After a power up or a PC reset the Watchdog normally waits 2 5 minutes to allow the PC to re boot This time can be shortened in software Command Mode Sometimes the PC will require more than 2 5 minutes to complete the re boot which can be accommodated by turning on this switch In Passive or Active Mode the Watchdog will delay starting the timeout counter until it sees the first activity in either of these modes NOTE Be Careful with this switch If it is on and the PC locks up during reset then the board would not get tickled
14. e Watchdog A read will return OxFFFF if the board is not yet armed Be careful using low times 1 or 2 seconds if your application runs as a low priority task 17 8 9 Command 0x1A Read Holding Register Watchdog Time This command only works on boards with firmware version 1 45 or higher The USB PC Watchdog uses an internal register to store the watchdog time that will be reloaded into the countdown timer every time the board it tickled Typically this value will be determined by the DIP Switch setting It can be replaced by using the Write Current Watchdog Time 0x19 in the prior section or it can be replaced with a value from the non volatile memory which overrides the DIP Switch values at power up Send Command Port 6 CMD Port 5 MSB Port 4 LSB 1 Not Used Not Used WDog Response Port 6 RESP Port 5 MSB Port 4 LSB 1 Hold Time Hold Time 18 8 10 Commands 0x1C amp 0x1D Read Save Non Volatile Watchdog Time These commands allow you to check and shorten lengthen the watchdog time for every reboot by saving the value in non volatile memory Send Commands BYTE 0 CMD BYTE 1 MSB Byte 2 LSB Ox1C Not Used Not Used Ox1D Delay Time Delay Time WDog Responses BYTE 0 RESP BYTE 1 MSB Byte 2 LSB Ox1C Delay Time Delay Time 0 1 Not Used Not Used Notes If the time read is 0x0000 using command Ox1C then there is not a new watchdog time in the non volatile memory The new watchdog
15. eccesssececssessseebestececessecosssdsevesecseresesusteCosessdovetsesdetecsossesusoateesesebaesstenssesdoesesoe 5 4 5 OVERS TEMP RESET SW 4 cesstescsececsuvedeasesevsssecevecdoatcesecedsscassessccossbees 6 4 6 Power ON DELAY POD EXTEND SW5 scccsssssssssscccsssssssscsscssssssssscssesssessssccscessscssessssessssssassssasesssscsescssees 6 4 7 Switcu 6 8 WATCHDOG DELAY TIME sccccsssssescceccccccccccsssscsccccccccccececscsscscceccccccceceecesscsssscccccessessssessccesesecses 6 5 EDS AND BUZZER cocoa eoo ood de dae aee ca E To dona no ve 7 A MN P D D oe EE M IH 7 5 2 D2 1095 0 7 5 3 BUZZER EORR 7 6 WATCHDOG DRIVERS PROGRAMS AND 5 8 6 1 8 7 LOW LEVEL PROGRAMMING INTERFACELE ssssssssssssssssssssssssccssssssccsssssscsscsscssssssssssssssssssssssssssscees 9 8 LOW LEVEL ACTIVE MODE OPERATION cccccssssssssssssssssssssssssssecsssssssssscssssscscssccssecceessscseeeeeessssees 10 8 1 COMMAND SUMMARY sessescscovssseessedecnvevevesdecsevsceceandessseseseccocsscsedesssesessasdseensscesseveccsedecsoasseusessdecsevessecesecSosevecseasesnes 10 8 2 ComMann 0x02 READ TEMP RE TRIGGER WATCHDOG cccccccccccccsssssssssscccccccccccccccessscccescccccccscecsccessssssssesses 12 8
16. future compatibility D7 Setto one 1 means non volatile inversion setting is active Note Option bits D1 amp D2 were added starting with firmware version 1 35 If D1 amp D2 are both set then D2 will take priority 21 8 14 Commands 0x58 amp 0x59 Read Write Temperature Offset This command allows you to increase the temperature trip points on the watchdog board These commands allow you to set the offsets up to 31 Ox1f If the offset is used then it will be active every time the PC powers up Send Commands BYTE 0 CMD BYTE 1 MSB Byte 2 LSB 0x58 Not Used Not Used 0x59 Not Used Offset WDog Responses BYTE 0 RESP BYTE 1 MSB Byte 2 LSB 0x58 Not Used Offset 0x59 Not Used Not Used Notes The offset here is in degrees C and can range from 0x00 to Ox1F Values higher will be corrected modulo 32 A non zero value is stored in the non volatile memory 22 8 15 Commands 0x5C amp 0x5D Read Write Buzzer Control This command provides a method to control the buzzer on the board Normally the buzzer sounds at power up and after each reset of the PC It only emits a beep that lasts about 600mS 0 6 seconds This command provides additional control via bit field parameter This command added at Version 1 50 firmware Send Commands Port 6 CMD Port 5 MSB Port 4 LSB 0x5C Not Used Not Used 0 5 Not Used Bits WDog Responses Port 6 RESP Port 5 MSB Port 4 LSB 0x5C Not Used Bits 0 5
17. i ode eei aaa 30 11 APPENDIX C SERVICE AND TECH SUPPORT ccssssssssssssssssssssssssssssssscsssssssscsccscesesssscsscesseess 31 PLT CALLING TECH SUPPORT eese ooi eate ees osa e eeu nin ue e Vra Roa RUNE 31 11 2 PRODUCT RETURNS 31 12 APPENDIX D AGENCY 5 32 12 1 Crass 32 1227 32 1 Introduction The USB PC Watchdog 1 an internal device that is used to monitor a PC in order to ensure maximum system availability It has the following features Connects to USB port or a hub on a PC running Win98 ME 2000 XP or Vista Receives power from USB bus Watchdog timer that can be set from 5 seconds to 1 hour via DIP switch or 1 second to 18 hours via software control Monitors the PC USB bus for line activity in the passive mode Can be used right from the box without any support programs Has an on board temp sensor to detect fan failures or other over temp conditions Two temperature trip points Trip points can be modified by user software Audible alarm for the temperature trip point Programmable options allow the Watchdog to hold the PC in reset after the upper trip occurs Also has an active Mode that allows a user program to have additional control over the Watchdog Two externall
18. inal reset header on the motherboard Connect the USB cable to Host port on the PC or a port on a hub Connect the other end of the cable to the Watchdog The CD has a program to tickle the Watchdog without having to write any software See the USB WDog Tickle directory on the CD for a tickle program that can be setup to install automatically 3 2 Auxiliary Relay There is a second set of relay contacts are on the 1 8 stereo jack on the bracket above the LEDs The two relay contacts are on the inner two contacts of the jack Tip amp Ring The sleeve of the jack is grounded through its connection to the bracket This relay can be controlled by software 3 3 USB Rev B Internal Connection Header The new version of the board Rev B has a four 4 pin 0 100 single row header for USB connection to a USB header on a PC motherboard This header is located directly behind the standard USB connector on the board The pin out of the header 15 The enclosed cable with the four pin single row receptacle at each end is used to connect to the motherboard header Pin 1 should be the RED wire The red wire should connect to the Plus terminal on the motherboard header NOTES Do not reverse the cable damage could be done to the Watchdog or the motherboard Do not use the regular USB cable if using the motherboard header connection 3 3 1 Internal Mounting The USB can be mounted internally by removing the standard PC brac
19. its Notes The response data byte is a bit field defined as DO one 1 if non volatile memory OK If zero 0 then all data was cleared D1 Setto one 1 if temperature sensor is OK D2 4 Not used will read as zero D5 Setto one means the board is disabled by the disable command Note This status bit was added at Firmware Rev 1 45 Will read as zero 0 on older firmware D6 Setto one 1 means the board has POD Extend switch on The board has finished the POD time but is waiting for the first Temp read to tickle the watchdog Note This status bit was added at Firmware Rev 1 45 Will read as zero 0 on older firmware D7 Setto one 1 when the board has completed its power on delay and is armed 13 8 4 Command 0x08 Get Firmware Version Number This command will return the numeric version of the firmware on the board Send Command BYTE 0 CMD BYTE 1 MSB Byte 2 LSB 0x08 Not Used Not Used WDog Response BYTE 0 RESP BYTE 1 MSB Byte 2 LSB 0x08 Whole Fraction Notes The response data will be two bytes The MSB is the whole number portion of the version and the LSB is the fraction EX 0x01 0x09 Version 1 09 8 5 Command 0x0C Get Dip Switch Settings This command will return the setting of the Dip switch The returned data is a byte 8 bits for each switch with DO representing SW8 through D7 for SW1 A switch that is ON will read as a one 1 Send Command BYTE 0
20. ket and using 74 40 hardware There is a mechanical drawing file MechanicalDrawing PDF on the CD which shows the dimensional information for the two holes on the board 4 Dip Switch Settings the switches are read at power up and after each time that the Watchdog resets the PC A switch that is DOWN is OFF and a switch that is UP is ON The following sections cover the switch options Enable Passive Mode Enable Active Mode Temperature Reset Enable 6 8 Watchdog Delay Time 4 1 Mode Switches SW1 amp SW2 These two switches set the operating mode of the Watchdog If both of these switches are off then the Watchdog powers up in factory diagnostics mode and will not operate properly It is OK for one or both of these switches to be on at one time The Watchdog will support both modes together 4 2 Passive Mode SW1 When this mode is active the Watchdog will monitor the USB for 321 polling interrupt packet from the host PC Each packet will cause the Watchdog to reset its timeout count If the PC locks up and the packets stop then the Watchdog will count down to zero and reset the PC We recommend that you no longer use this option There is a program on the CD that will tickle the board in Active Mode 4 3 Active Mode SW2 If this switch is on the Watchdog enters command mode This requires that the PC send commands to the Watchdog as USB data packets to make it reset the timeout counter See the Comman
21. of the current CD image Make sure you unzip them with the option to preserve directory structure 7 Low Level Programming Interface There is now a new DLL API USB v1 WDog DLL for interface and access to the board It is recommended that all new users of this board stick with this API The functions in this DLL are in the same format and are shared by the Ether USB PC Watchdog and the PCI board AII the functions in the old DLL are included in the new DLL This should make transition to the new DLL a little easier The new DLL will work with Win 2K XP amp Vista Please see the USB WDog Int ProgrammersManual PDF on the CD for coverage of the functions in the new DLL The older DLL and static library files are still on the CD The old sample programs Console Ap amp VB6 programs are still there The functions in the old DLL and LIB files only provide a low level interface to the board The old DLL amp LIB files support Win 95 98 2000 NT XP 8 Low Level Active Mode Operation The Watchdog is designed to monitor the USB bus from the PC and respond to commands from the PC when the Active Mode is enabled See the enclosed programs on the CD for sample code that you can use in your application program Not recommended for new users Use the new DLL on the CD 8 1 Command Summary This tables summarizes the commands that can be sent Command Description NV VER 0x02 Read
22. on the board will monitor the internal temperature of the PC There are two standard temperature trip points available 46 C 115 and 56 C 133 F At the first trip point the PC Watchdog board will activate one of the relays if the option is selected It will also activate an audible alarm and an external signal that is available on the DB 25 connector At the second trip point the PC Watchdog can optionally pull a hard reset on the PC to stop further processing There is an option to allow shifting the trip points higher via software control The trip points can be increased in 1 C increments up to 77 C 171 F and 87 C 189 F 3 Supplied Components The standard Watchdog package contains the following items The USB PC Watchdog timer on a standard PC I O bracket A USB interface cable A CD ROM A reset cable 3 1 Installation of Supplied Components Perform these steps to install the Watchdog Locate an unused I O slot in the PC Remove the blank bracket and install the Watchdog Make sure the Dip switches are set properly before applying power to the Watchdog since it only checks the switches at power up and after each reset of the PC Disconnect the PC reset cable from the motherboard Plug this cable onto the J5 J4 on Rev A header labeled Reset SW in the upper left corner of the Watchdog board Plug the supplied reset cable onto J4 J3 on Rev A labeled CPU Reset on the Watchdog board and plug the other end onto the orig
23. on volatile buzzer time setting is was active Using the read command 0x5C will tell you what IS the current state After using the write command 0x5D the response will be what WAS the prior state before your new changes 24 8 16 Command 0x80 Reset PC Use this command carefully It will reset your PC Send Command BYTE 0 CMD BYTE 1 MSB Byte 2 LSB 0x80 5 Delay Time WDog Response BYTE 0 RESP BYTE 1 MSB Byte 2 LSB 0x80 Not Used Flag Notes If the delay time 1 set to zero the reset will occur immediately The delay time can be as high as 255 OxFF seconds If the board is not armed it will return a flag byte set to zero In this case you will need to shorten the arm time to get the board armed If the reset time is not zero and the board is armed then the flag will be non zero The MSB must be set to Ox 5 as a safety feature if it is not OxAS then the flag returned will be zero Once this command has been sent it cannot be disabled The board will enter a mode where it will no longer communicate with the PC until the reset has been done Even if the Watchdog board has been disabled via command 0x30 this command will still work 25 8 17 Command 0x84 Get Clear Reset Count When the watchdog board powers up it will set a counter to zero Every time it resets the PC this count will increase by one Use this command to get the count If the Clear Flag is non zero then the board will clear the count af
24. ort is available Monday through Friday except holidays 8 30 AM to 5 00 PM Eastern Time 770 271 0088 Email support berkprod com 11 1 Calling Tech Support To help our tech support personnel with your problem please try to have the following information ready e Type of PC e Type of operating system and version e Clear description of the problem 11 2 Product Returns Please call our tech support personnel before returning a product Many times the problem can be corrected over the phone If the tech support representative determines that your product must be returned they will assign you a RMA Package the product in a secure container and return it to us freight prepaid We will not accept COD freight charges Indicate the RMA on the package or shipping label If the repairs are done under warranty the unit will be returned UPS ground and we will pay the freight charges If you prefer Federal Express please provide your Federal Express account number If your unit is out of warranty repairs and shipping will be charged COD or other method established in advance 31 12 Appendix D Agency Approvals The PC Watchdog meets the following agency approvals 12 1 FCC Class A This equipment generates and uses radio frequency energy and if not installed and used properly that is in strict adherence with the manufacturer s instructions may cause interference to radio and television reception It has been tested and
25. port the command Items in bold type are new since last manual The USB PC Watchdog uses a 6 byte report format The board currently uses only 3 of the six bytes of the report The report format in both directions is formatted as Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5 CMD Data MSB Data LSB Not Used Not Used Not Used Do not use commands higher than 0xE0 They are for testing purposes only and will produce undesirable results 11 8 2 Command 0x02 Read Temp Re trigger Watchdog This command will return the internal temperature of the PC and it also serves to re trigger tickle the watchdog to reset the internal countdown timer Send Command BYTE 0 CMD BYTE 1 MSB Byte 2 LSB 0x02 Not Used Not Used WDog Response BYTE 0 RESP BYTE 1 MSB Byte 2 LSB 0x02 Not Used Temp Notes Returns the temperature data in degrees Celsius The temperature readings are updated once per second This is a signed value that can report temperatures less than zero 12 8 3 Command 0x04 Get Status Information This command will return the status of the board It is recommended that this command be used every once in a while The non volatile memory chip employs hardware circuits and software features to prevent inadvertent data corruption However no method is always perfect Send Command BYTE 0 CMD BYTE 1 MSB Byte 2 LSB 0x04 Not Used Not Used WDog Response BYTE 0 RESP BYTE 1 MSB Byte 2 LSB 0x04 Not Used B
26. re their own ID data These bytes could have many uses with one of them being a software security mechanism A user could make their software refuse to run unless there was a watchdog board in the system with the correct code in the memory Send Commands BYTE 0 CMD BYTE 1 MSB Byte 2 LSB OxCO Offset Not Used OxC1 Offset User Data WDog Responses BYTE 0 RESP BYTE 1 MSB Byte 2 LSB OxCO Not Used NV Data OxC1 Not Used Not Used Notes The offset should be a number between 0 and 7 Higher values will be corrected to modulo 8 Data can be any value from 0x00 to OxFF 8 20 Invalid Commands If you send a command is not implemented in the firmware on the board then the board will respond with zeros in all three response bytes 8 21 Special Diagnostics 0 0 to OxFF Do Not Use These commands are used for internal testing purposes Do not use commands higher than 0xE0 They are for testing purposes only and will very likely produce undesirable results 28 9 Appendix Specifications Power Requirements 5 VDC 60mA Max Environmental 20 65 C Operating 20 70 C Storage 5 95 Relative Humidity Non Condensing MTBF 500 000 Hours TEMP 1 5 Note You may find that the board will continue to work just fine beyond the specified temperature limits especially at lower temperatures These temperature limits are those specified by the manufacturers of the integrated circuits Auxilia
27. ry Relay 2 SPST 1 form a 48V 0 5 max This relay has contacts that are available on the 1 8 Stereo jack above the two LEDs The tip of the plug is one relay contact and the ring second terminal on the plug is the other relay contact The major or last conductor sleeve of the plug is ground and is connected to the PC bracket 29 10 Appendix B Warranty Berkshire Products Inc warrants to the original consumer or other end user purchaser that this product is free from defects in materials or workmanship for a period of one 1 year from the date of purchase During the warranty period and upon proof of purchase the product will be repaired or replaced with the same or functionally equivalent model at our option without charge for either parts or labor This warranty does not apply to defects due directly or indirectly to misuse abuse negligence accident repairs or alterations made by the customer or another party UNDER NO CIRCUMSTANCES WILL BERKSHIRE PRODUCTS Inc BE LIABLE IN ANY WAY TO ANY PURCHASER FOR DAMAGES LOST REVENUE LOST WAGES OR ANY OTHER INCIDENTAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THE USE OR INABILITY TO USE THIS PRODUCT Berkshire Products Inc reserves the right to make modifications in this product without prior notification 30 11 Appendix C Service and Tech Support We are available to help you with your questions and problems that you may have with our product Our technical supp
28. since no program would load This would leave the PC permanently frozen A better option is store a longer POD time in non volatile memory 4 7 Switch 6 8 Watchdog Delay Time These switches set the delay time until the watchdog resets the PC As long as the watchdog is receiving re trigger pulses it will continue to reset the delay time The settings and times are shown below Switches 6 8 Delay Time Switches 6 8 Delay Time OFF OFF OFF ON OFF OFF OFF OFF ON 10 Seconds ON OFF ON OFF ON OFF 30 Seconds ON ON OFF OFF ON ON ON ON ON These times can be overridden with other delays by a user program 5 LEDs and Buzzer 5 1 D1 LEDs There are two LEDs on the back of the board After the PC powers up the PC Watchdog will wait a programmed amount of time set by the switch option before it enters its watchdog mode During this time the top LED will pulse at a 1 second rate 1 second on 1 second off When the PC Watchdog is ready and armed it will start flashing the top LED at a 300 milli second rate as an indication that it is running OK When the watchdog is within 4 seconds of resetting the PC it will flash this LED at a 1 10 second rate If the watchdog board resets the PC the top LED will return to its one second toggle rate while it waits again for the PC to undergo a new reset sequence When this occurs the bottom LED will be forced on This LED can be cleared by cycling power on the PC pressing the front panel reset button
29. ter it has been returned If the count is cleared to zero then the bottom LED will also be turned off Send Command BYTE 0 CMD BYTE 1 MSB Byte 2 LSB 0x84 Not Used Clear Flag WDog Response BYTE 0 RESP BYTE 1 MSB Byte 2 LSB 0x84 Not Used Count Notes The count ranges from 0x00 to OxFF 255 When the counter hits the upper limit it will stop rather than rollover 26 8 18 Commands 0x88 amp 0x89 Read Write Reset Relay Pulse The default mode for the Watchdog is to pulse a reset relay which simulates pushing the reset button for 3 seconds This value works for most computers however some machines may require longer or shorter values This command allows you to tailor the pulse time by selecting a delay in 5015 tics Send Commands BYTE 0 CMD BYTE 1 MSB Byte 2 LSB 0x88 Not Used Not Used 0x89 Not Used Delay Tics WDog Responses BYTE 0 RESP BYTE 1 MSB Byte 2 LSB 0x88 Not Used Delay Tics 0x89 Not Used Not Used Notes The delay time can range from 0x01 to OxFF tics A value of zero 0x00 allows you to return to the default 3 second pulse The new time will be activated at the next re boot of the PC and it will be stored in non volatile memory Be careful using low times 1 or 2 tics since these may be too short to generate valid resets on the PC 21 8 19 Commands 0 0 amp 0xC1 Read Write User ID Data Eight 8 bytes of the non volatile memory have been reserved for the user to sto
30. y visible LEDs show status of Watchdog Watchdog has a second relay available on an external jack to control other devices such as triggering an alarm panel Programmable power on delay to allow the PC to complete its initialization sequence Non Volatile memory to store operating parameters Eight bytes of non volatile memory reserved for user data to implement simple software protection The latest versions of all manuals and sample code can be found on our site at http www berkprod com If you have any questions corrections or feedback about this manual please contact us at man1140feedback berkprod com 2 Operation This device is designed to monitor PCs used in critical applications such as File Servers Voice Mail Systems ISP systems industrial applications etc The idea is to make sure the PC 1 always available and running especially for systems that are not continuously monitored When the PC is powered up or after a reset of the PC the PC Watchdog will wait a preset amount of time 2 5 minutes standard to allow the PC to complete its reset and initialization sequence This time will be referred to as Power On Delay POD After this time has expired the PC Watchdog will Arm itself and start a watchdog timer running user defined time out period There is a DIP Switch option to allow the Watchdog to extend this time for PCs that need additional re boot time Once the Watchdog is ready to arm itself it will check the D
Download Pdf Manuals
Related Search