Objective Development Forums

Re: Help: usbFunctionWrite isn't called

2009-11-04T12:14:11+02:00

Hi
I am trying to use V-Usb to control a display To send text to the display I thought I would use control messages, using usbFunctionWrite() to get the string data.
I have got the communication up and running: there are valid calls to usbFunctionSetup(), but usbFunctionWrite() is never called. Thus I never get any data.
I need some help to decode that!

Statistics: Posted by johnnyblame — Wed Nov 04, 2009 12:14 pm

Re: Help: usbFunctionWrite isn't called

2009-11-01T11:01:32+02:00

Make sure that you do a "make clean" after changing USB_CFG_IMPLEMENT_FN_WRITE in usbconfig.h. The makefile does not contain dependencies on this file, as far as I remember. Or delete all object files manually to ensure that everything is re-compiled.

Statistics: Posted by christian — Sun Nov 01, 2009 11:01 am

Re: Help: usbFunctionWrite isn't called

2009-10-24T00:48:57+02:00

I have the exact same problem. Do you remember what your problem in the host program was?

Statistics: Posted by ionte — Sat Oct 24, 2009 12:48 am

Help: usbFunctionWrite isn't called

2007-07-15T13:54:26+02:00

Problem solved! It was a problem on my host program!

Statistics: Posted by iphi — Sun Jul 15, 2007 1:54 pm

Help: usbFunctionWrite isn't called

2007-07-14T22:48:03+02:00

I have problems implementing usbFunctionWrite.

Here is what I did:

-implemented usbFunctionWrite in main.c
-in usbFunctionSetup: return 0xff
-in usbconfig.h: #define USB_CFG_IMPLEMENT_FN_WRITE 1

But nevertheless usbFunctionWrite is never reached regardless of the control messages I send.

Have I missed something?

Statistics: Posted by iphi — Sat Jul 14, 2007 10:48 pm