K8055

Kits PC Related Projects
1

Hello,

  1. On 1 of our systems the K8055 board is not recognized; the system continuously says loading driver failed. Do you have the most recent standalone driver for the K8055 available?
  2. In the kit software there is a compact K8055D.DLL (20KB) version 2.0 that should be quicker. Using this DLL on a system that works with the old DLL (338KB) does not react on any VB command I send to the card. Please Advice!

Regards,
Christian

2

The original K8055 has a bug in the USB descriptor that causes DirectX to crash on Windows XP and it is suspected that on Windows 7 systems it sometimes causes the card not to be recognized at all.

The only fix I know for this is to replace IC3 with a PIC18F2550 as described here: jannicash.info/k8055/

Velleman fixed this problem in the K8055N.

Regards,
Jan

3

Here you can download the latest, fast and compact DLL version 4.0.0.0 for the K8055:
velleman.eu/support/download … 8055&type=
Download the package: “Complete SDK Pack (Rev 4.0)”.
Copy the file K8055D.DLL from the folder \DLL_v4.0.0.0 to the [color=#000080]\Windows\System32 [/color]folder.
In 64-bit environment copy the file to [color=#000080]\Windows\SysWOW64[/color] folder.

There are also programming examples included to the package.

4

OK thanks, question 2 is answered and solved, driver woks fine. But still question 1 still remains. I got a reply from a person in America but not from Velleman itself. You can’t be serious I need to program and replace the microcontroller to solve the issue. Velleman should solve the issue if a bug is in the hardware. I just bought the K8055 card. I use Windows 7 32-bit, in the device manager the K8055 device cannot be started (error code 10). Frequently I need to uninstall the driver and rescan to install it again to get the K8055 working again.

Please advice and reply.

Regards, Christian

5

Seriously? Sheesh, it doesn’t look good for Velleman really does it.

I must say I’ve never had any trouble with my K8055 on XP (can’t even remember if I’ve tried it on Win7) so I’m a bit shocked to hear that you have to rip out an IC and replace it with a PIC - especially when Vellemans own PIC programmer can be a bit of a non-starter.

6

Connect your K8055 to an XP system, then run dxdiag.exe.