Re: [Libphidget-devel] libphidget newbie post...

[Tom B. <tb...@ba...>]

On 29 Jun 2003, Jack Strohm wrote:

> I'm still adding the new protocol to the code, I hope to have a test
> version checked in tonight, wasn't feeling good yesterday so didn't make
> much progress.  
> 
> Yep, the input buffer has gone from 7 to 8 bytes.  Here is the protocol
> that chester sent me:

sorry, I have that (the protocol). I just didn't expect the
behaviour I got from the system for a buffer size mismatch. 
AFAIK, I'm pretty much homefree from here, the rest should be
pretty trivial... just a case of finding another block of 5
hours...

While I'm here, my system isn't showing an output endpoint for
the 888 card... I don't have anything to compare it to... hhmm,
ok, it looks like we don't have a separate endpoint, e.g...

   if (_isSoftPhidget(phidgetType(phidgetDevice))==0)
   {
      // If this isn't a soft phidget we use control messages so
      ret=usb_control_msg(phidgetDevice->handle, 0x21, 0x09, 0x200, 0,
	    buffer, size, 5000);
   }
   else
   {
      // Only works for writing to soft phidgets
      ret=usb_bulk_write(phidgetDevice->handle, 0x01, 
         (void *)buffer,size, 5000);
   }

Is that conclusion/guess correct? The digitout outputs are
controlled with a control message?

is there somewhere were these magic constants like 
"0x21, 0x09, 0x200" and the ones used to obtain the serial number
are described?

-Tom