K8055 problem

Kits PC Related Projects
1

HI@All

I have a big problem with the K8055 USB Board.

If I connect two USB Boards to my PC.
( all wiht a different adress, naturaly )

And Restart My Pc.

One of the two boards does not work.

The Software “USB View” shows DeviceFailedEnumeration.

But If plug in the board’s while the PC is already running,
they just work.

I’f tested it with 8 Different board’s.

Every test the same result.

Can it be, that the PIC on the K8055, has a little problem.
In case more than ONE board is simultaneously is plugged in ?

NEED HELP !!

2

This may be Windows operating system based problem.
I made a test: I connected two K8055 cards to the PC and restarted it.
In a desktop PC running Windows 2000 and Windows XP both cards were operating after the PC restart.
In a laptop running Windows Vista 32-bit and Windows 7 64-bit the both cards were operating when Windows 7 was restarted. With Windows Vista both cards had to be disconnected and reconnected to the USB slot before they were operating.

3

Hello,

Thank you for your answere.

I’m using windows XP SP2.

Is there any kind of software, to solve this problem ?
( to reconnect the card’s without any mechanical motion ? )

Ore is there a possibility to RESET the Board via Software ?

I’ve read in a treat , that the USB board’s doesn’t run under SP3,reliable. Is that truth?

THX

4

I’ve tried it too on my HP laptop windows 7 32 bit with 2 cards connected. (0 and 2)

When I reboot (I’v tried this about 5 times) both card always work as they should. When the computer reboots on both cards led 8 does not flash at all.

But when I shut off…

As soon as I turn the computer on both led’s 8 light up, but then things go different.

  • Sometimes before windows is started both cards are recognised (led 8 flashed 3 times) and are correctly recognised and work well.

  • One time the boot screen stayed black with 2 vertical white lines on the middle and left side. The windows login screen appeared and everything worked well. Both cards were correctly recognised.

  • One time one card (0) was directly recognised, but on card (2) led 8 stayed on and was reset during the starting up of windows. Both cards worked then as they should.

One thing you could try is using a seperate USB hub. On another labtop I’ve had many problems with the recongnition of the K8055 directly connected on the laptop. However with a hub (I used a medion) there were no problems.

I hope this can help to solve your problem.
Hilbrand

5

Dear Hilbrand,

I’ve bin working about one week at these Problem.

I tested it about hundret times,

Some times it work, other time it don’t …

I can’t retrace why.

Fact is, it does not matter whitch port the board is connectet to.

Or which kind of hub i use.

I’ve tested , DIGITUS , NO-NAME-CHINA and DElock.

sometimes it work’s and somtimes not.

Then I’ve trying to connect the board’s directly to the PC.

same result.

… Then bords connected du different root Hub port’s @ Mainboard.

same result … no 100 percent security that it works.

one complete day i waste my time to test if hardware delay @ start up can solve the problem. ( in hope, that the PIC is correctly inizialised )

NO result

I do not knows any further

6

Dear 3210pk (eheh)

The only thing I can think of this moment is that you can enable booting from USB in the BIOS. At this moment I can’t test it cause my laptop doesn’t support it.
Don’t know if this can disturb the recognition of one card if it is set to USB.
Have a look in your BIOS.

Coming weeks I’ll try it on several computers at my school. If I find something I will let you know.

Hilbrand

7

Dear HOB

new insights :

all BIOS settings have been verified … … without success

windows 7 and windows vista have been tested … … without success

still the same error with 2 cards.

I’m going to try to find an alternative hardware,
because I see no other possibility.

thank you very much…