Hi David,

I don't know what that could be and I haven't heard of it before.  Goggling shows many problems with W8 touchpad freezing. 

I assume you just connect KFLOP without running any of our software and it freezes?   Maybe W8.1 thinks KFLOP is a mouse?  Have you been able to load our driver?  What does Device Manager Show KFLOP as?

Here is a link I found from Microsoft but I wouldn't have high expectations.
http://answers.microsoft.com/en-us/windows/forum/windows_8-hardware/touch-pad-becomes-inactive-and-pointer-freezes-on/7247834e-fe06-458f-afcb-8e34799343f1?page=2

Regards

TK

Group: DynoMotion	Message: 8990	From: daveymahomh600e	Date: 1/26/2014
Subject: Re: KFlop Freezes System Pointer

Hi Tom, I'll try to explain what is happening... KMotion loads and runs fine until I process a c program. The program executes and finishes, but then the pointer is frozen. If I disconnect KFLOP and reconnect the pointer is fine. I have a 3phasebrushlessstartup.c file to initialize the drives. Running it affects the pointer in the manner noted above. I tried adding the Konnect code to it, at the top just inside the main bracket, but when the file processes it disconnects KFLOP, puts a window up showing "Read failed - auto disconnect" but then reconnects within a few seconds. The pointer then is fine, but the code has been dumped from KFLOP because of the disconnect. Any suggestions? Again, the system is 64bit W8.1 Thanks, David.

Group: DynoMotion	Message: 8991	From: Tom Kerekes	Date: 1/26/2014
Subject: Re: KFlop Freezes System Pointer

Hi David, It sounds to me more like a noise problem rather than a software/driver problem because it only happens after you enable your SnapAmp Axes and the 80V (or whatever) starts switching on all your motor wiring and such.  Is this correct.  You could try an experiment where you run the same c file that causes the freeze but with high voltage supplies turned off to see if you still get the freeze or not.  Also if this is a laptop try running on battery for full isolation. Regarding the Konnect:  Try running the EnableKonnect.c example by itself and check if Konnect works correctly in that there is no error on the Console Screen, and you can toggle Output 48 on the Digital IO Screen to Toggle the Output LED 0 on Konnect. Regards TK Group: DynoMotion Message: 8993 From: David Stevenson Date: 1/26/2014 Subject: Re: KFlop Freezes System Pointer Hi Tom, It looks like there may be a noise issue. Running with just the laptop allows the Konnect to load and toggle. I did see a new error when trying to run the brushless startup with the Konnect code and the main power on... "COMM ERROR AUX1 (signature not A5). Does that yield any other clues? Thanks, David. ***************** On 1/26/2014 1:39 PM, Tom Kerekes wrote:   Hi David, It sounds to me more like a noise problem rather than a software/driver problem because it only happens after you enable your SnapAmp Axes and the 80V (or whatever) starts switching on all your motor wiring and such.  Is this correct.  You could try an experiment where you run the same c file that causes the freeze but with high voltage supplies turned off to see if you still get the freeze or not.  Also if this is a laptop try running on battery for full isolation. Regarding the Konnect:  Try running the EnableKonnect.c example by itself and check if Konnect works correctly in that there is no error on the Console Screen, and you can toggle Output 48 on the Digital IO Screen to Toggle the Output LED 0 on Konnect. Regards TK Group: DynoMotion Message: 8995 From: Tom Kerekes Date: 1/26/2014 Subject: Re: KFlop Freezes System Pointer Hi David, COMM ERROR AUX1 (signature not A5) means that there was a communication error with KFLOP communicating with Konnect.  Every 180us KFLOP reads/writes all the IO from Konnect including a fixed 8-bit signature of Hex A5.  If the A5 is not read properly this error is displayed and Konnect is disabled. Does this happen right away?  Or after a while?  Are you turning on Konnect in the example program before running the brushless startup or within it?  How long is your ribbon cable to Konnect? Regards TK Group: DynoMotion Message: 8996 From: David Stevenson Date: 1/26/2014 Subject: Re: KFlop Freezes System Pointer Hi Tom, The error occurred while trying to run the brushless file... I clicked the save/compile and the KFLOP disconnected and then reconnected, clicked again, same outcome, clicked again and the error showed up in the console window on about the third go around. Once the Konnect is disabled will it try to reconnect? The ribbon is about 12 inches in this machine. There is no way to make it any shorter. Thanks, David. ******************** On 1/26/2014 3:04 PM, Tom Kerekes wrote:   Hi David, COMM ERROR AUX1 (signature not A5) means that there was a communication error with KFLOP communicating with Konnect.  Every 180us KFLOP reads/writes all the IO from Konnect including a fixed 8-bit signature of Hex A5.  If the A5 is not read properly this error is displayed and Konnect is disabled. Does this happen right away?  Or after a while?  Are you turning on Konnect in the example program before running the brushless startup or within it?  How long is your ribbon cable to Konnect? Regards TK Group: DynoMotion Message: 8997 From: Tom Kerekes Date: 1/26/2014 Subject: Re: KFlop Freezes System Pointer Hi David, Regarding if Konnect will try to re-connect: basically no.  It isn't really a matter of "a connection" rather whether it is being "serviced".  When a board is "added" to an Aux port then KFLOP will service the board until there is an error.  To resume servicing Konnect the two lines of code would need to be re-executed to clear the Aux Port and re-add the board. I'm confused on what you are doing with regarding to connections, power, and coding. I think there might be two problems.  One being SnapAmp/noise/disconnects and another with Konnect/COMM Errors. Let's go back to square one and go one step at a time. Remove Konnect completely - hardware and any code. Does your brushless file run and work with motor power on correctly? Regards TK   Group: DynoMotion Message: 8998 From: David Stevenson Date: 1/26/2014 Subject: Re: KFlop Freezes System Pointer Hi Tom, It seems to run correctly, but the screen pointer is frozen afterwards and I can't do anything without the pointer. My brushless code outputs to the console that the axis are ready to go. If I then disconnect the motor power, the pointer releases. If the motor power is turned on again, the pointer freezes again. Thanks for your help,  David. ********************* On 1/26/2014 3:47 PM, Tom Kerekes wrote:   Hi David, Regarding if Konnect will try to re-connect: basically no.  It isn't really a matter of "a connection" rather whether it is being "serviced".  When a board is "added" to an Aux port then KFLOP will service the board until there is an error.  To resume servicing Konnect the two lines of code would need to be re-executed to clear the Aux Port and re-add the board. I'm confused on what you are doing with regarding to connections, power, and coding. I think there might be two problems.  One being SnapAmp/noise/disconnects and another with Konnect/COMM Errors. Let's go back to square one and go one step at a time. Remove Konnect completely - hardware and any code. Does your brushless file run and work with motor power on correctly? Regards TK   Group: DynoMotion Message: 8999 From: Tom Kerekes Date: 1/26/2014 Subject: Re: KFlop Freezes System Pointer H David, ok we need to resolve this before going forward. You don't have a USB mouse?  Or use the keyboard? That would allow us to see what else is working and what is not working while the touchpad is frozen. So it seems switching noise from SnapAmp/Motor wiring is causing the touchpad to freeze. It seems strange that noise through the KFLOP USB cable would affect the touchpad but not the KFLOP communication. I suppose we would need to have all the info on your wiring, grounding, shielding, etc...  Maybe you could come up with some experiments yourself to track it down? I don't know if internally to the laptop the touchpad is USB?   It appears switching noise is entering through the USB cable into the Laptop and disturbing the touchpad? What if you leave motor power on but unplug the USB cable from the laptop?  (I think you said before this releases the touchpad?)  What about if you unplug the end at KFLOP and leave the free cable plugged into the laptop? Regards TK Group: DynoMotion Message: 9001 From: David Stevenson Date: 1/26/2014 Subject: Re: KFlop Freezes System Pointer Hi Tom, I plugged in a USB mouse and it still works when the touchpad is frozen, as does the keyboard. That lets me move around, which is great,  and I can deal with the touchpad later. What I did was run the brushless file, with the Konnect code removed and it seemed to work fine. I could upload the channels as expected in the console. Next I loaded the Konnect and it worked properly too... I could toggle #48. Then I tried running the brushless file again and the KFLOP disconnected and then reconnected as previously noted. I also tried including the Konnect in the brushless file, but KFLOP disconnected and then reconnected as before. Your thoughts? Thanks, David. ******************* On 1/26/2014 4:49 PM, Tom Kerekes wrote:   H David, ok we need to resolve this before going forward. You don't have a USB mouse?  Or use the keyboard? That would allow us to see what else is working and what is not working while the touchpad is frozen. So it seems switching noise from SnapAmp/Motor wiring is causing the touchpad to freeze. It seems strange that noise through the KFLOP USB cable would affect the touchpad but not the KFLOP communication. I suppose we would need to have all the info on your wiring, grounding, shielding, etc...  Maybe you could come up with some experiments yourself to track it down? I don't know if internally to the laptop the touchpad is USB?   It appears switching noise is entering through the USB cable into the Laptop and disturbing the touchpad? What if you leave motor power on but unplug the USB cable from the laptop?  (I think you said before this releases the touchpad?)  What about if you unplug the end at KFLOP and leave the free cable plugged into the laptop? Regards TK Group: DynoMotion Message: 9003 From: Tom Kerekes Date: 1/26/2014 Subject: Re: KFlop Freezes System Pointer Hi David, The Reset signal in the 1 foot long ribbon cable may be picking up noise and crosstalk and causing KFLOP to reset. Were you aware of this issue?  See this post on adding a filter capacitor: http://groups.yahoo.com/neo/groups/DynoMotion/conversations/messages/8541 Regards TK Group: DynoMotion Message: 9005 From: David Stevenson Date: 1/26/2014 Subject: Re: KFlop Freezes System Pointer Hi Tom, I know you had recommended keeping the ribbon as short as possible. Didn't realize the filter might have to be added.  Any plans to add shielded cables anywhere down the road? It's easier (and maybe less expensive) for a non-electronic guy like me to stick to din relays and not risk frying an expensive board. Thanks, David. ********************* On 1/26/2014 6:06 PM, Tom Kerekes wrote:   Hi David, The Reset signal in the 1 foot long ribbon cable may be picking up noise and crosstalk and causing KFLOP to reset. Were you aware of this issue?  See this post on adding a filter capacitor: http://groups.yahoo.com/neo/groups/DynoMotion/conversations/messages/8541 Regards TK Group: DynoMotion Message: 9006 From: Tom Kerekes Date: 1/26/2014 Subject: Re: KFlop Freezes System Pointer Hi David, The next rev 1.3 of KFLOP will have a filter cap on reset and should no longer have this issue. Regards TK Group: DynoMotion Message: 9007 From: David Stevenson Date: 1/26/2014 Subject: Re: KFlop Freezes System Pointer Hi Tom, When will you start shipping those? Thanks again, David. ****************** On 1/26/2014 7:33 PM, Tom Kerekes wrote:   Hi David, The next rev 1.3 of KFLOP will have a filter cap on reset and should no longer have this issue. Regards TK Group: DynoMotion Message: 9008 From: Tom Kerekes Date: 1/26/2014 Subject: Re: KFlop Freezes System Pointer Hi David, Probably not for several months. Regards TK Group: DynoMotion Message: 9009 From: daveymahomh600e Date: 1/27/2014 Subject: Re: KFlop Freezes System Pointer Hi Tom, The earlier posts talk about adding the capacitor. Could you lend some guidance to a non-electronic guy on how to put one between those pins? Thanks, David. Group: DynoMotion Message: 9011 From: Tom Kerekes Date: 1/27/2014 Subject: Re: KFlop Freezes System Pointer Attachments : CapacitorOnReset-9011.jpg Hi David, The simplest method is to add an extra connector on a ribbon cable to either J4, J6, or J7 (on the KFLOP end).  Then insert a 0.001uF (same values as 1000pF) ceramic capacitor into the connector socket between Reset (JP6 pin 4 and GND pin8).  The capacitor is unpolarized and can be connected either way.  See attached photo.  Additional Link Here Here is a link to a Digikey source. Another option would be to have a very short cable to a breakout board and attach it there. Or place a Konnect very close to KFLOP. HTH Regards TK Group: DynoMotion Message: 9012 From: David Stevenson Date: 1/27/2014 Subject: Re: KFlop Freezes System Pointer [1 Attachment] Hi Tom, I think even I could do that... but first an uneducated question... I happen to have a 0.01uF capacitor (it's a long story) and was wondering if I can use that? Thank you very much! David ***************** On 1/27/2014 12:29 PM, Tom Kerekes wrote:   Hi David, The simplest method is to add an extra connector on a ribbon cable to either J4, J6, or J7 (on the KFLOP end).  Then insert a 0.001uF (same values as 1000pF) ceramic capacitor into the connector socket between Reset (JP6 pin 4 and GND pin8).  The capacitor is unpolarized and can be connected either way.  See attached photo.  Additional Link Here Here is a link to a Digikey source. Another option would be to have a very short cable to a breakout board and attach it there. Or place a Konnect very close to KFLOP. HTH Regards TK Group: DynoMotion Message: 9013 From: Tom Kerekes Date: 1/27/2014 Subject: Re: KFlop Freezes System Pointer Hi David, 0.01uF should work also. Regards TK Group: DynoMotion Message: 9014 From: David Stevenson Date: 1/27/2014 Subject: Re: KFlop Freezes System Pointer That's grrrrrreat!!! Thanks Tom! David **************** On 1/27/2014 12:53 PM, Tom Kerekes wrote:   Hi David, 0.01uF should work also. Regards TK