> > > > Is it possible to send a report to the pc without receiving one?
> > > Yes it is possible, For example USB Mouse/Keyboard are input only HID
> > devices.
> > > Check the Microchip HID Mouse Example, on which PIC will send packets,
> > without
> > > recieving any one.
> > I am using the modified mouse example from Lakeview Research. I made a
> > modification of my own whereby when I receive the Report, I send it back
> > twice (instead of just once, as was originally). But then, on the pc, I
> > tried to
> > read twice, but the 2nd read blocked (which  to my mind means - no data)
> > so I can't see that it is working.
> >
>
> Are you taking care of following things,
> * IOProcess shouldn't stall for long time ( If IOProcess lesser than
> 500 us is better)
> * Don't transmit two packets back to back , It won't work. Use
statemachine, and
>  only after first packet is transmitted, transmit the second packet.
>  (!mHIDTxIsBusy()) )
>  {
>     HIDTxReport(..); //won't work
>     HIDTxReport(..); //won't work
>  }

I am using this:
while(mHIDTxIsBusy())
  {
   // Service USB interrupts.

   USBDriverService();
  }

  // The report will be sent in the next interrupt IN transfer.

HIDTxReport(transmit_buffer, HID_INPUT_REPORT_BYTES);

while(mHIDTxIsBusy())
  {
   // Service USB interrupts.

   USBDriverService();
  }

  // The report will be sent in the next interrupt IN transfer.

HIDTxReport(transmit_buffer, HID_INPUT_REPORT_BYTES);

I am not sure about 500us, I use VB6 speed, no extra commands
between Reports.

I will try again just to be sure. Do you know what to do to increase
Report size to maximum 64?

Andy.
>
>
> regards,
> palani
>
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