Swordfish

Briefly I built a simple thermometer app using the ol' ds18b20. This communicates via CDC usb to an application written in Liberty Basic. I'ts a bit of fun as the temperature changes the face of a character rendered in 3d sofware changes. When it is hot he goes red and uncomfortable when it is cold he looks equally miserable. It all works well.

My problem is . . . in using any other vid & pid settings other than the default. I thought it would be a nice touch just to finialise the app with my own personal vid & pid.

Using the #option to change the PID & VID to anything other than the default settings prevents the PC from finding and installing the virtual com port.

VID 0x03EB PID 0x204D these are two of the numbers I tried there are plenty of them if you search for personal use.

I am using a PIC 18F2450 micro, what am I doing wrong? The help seems fairly clear . . I cannot understand it.

To be able to use usb in my projects is fantastic. I have not a clue how it works, but the help is clear. Everything has gone so well, I was not expecting this error. If anybody can offer a few words of wisdom I would be most appreciative.

Regards Nick

when you change the VID and PID in the firmware, think also to change them in the INF file (driver file) provided for CDC handling.

Regards

Hi, thanks for your response. Yes I did think to try this as I noticed the numbers were different in the .inf file, but it seems to have no effect. I just get the message about windows going on the net and searching for a suitable driver.

I will try it again to make sure that this is not the problem, it could be the way I am typing them in.

Regards Nick

Yes you were right, my fault in entering the numbers incorrectly. I could not understand why it would not work when obviously it should. Thank God for the Forum . . regards Nick