Jeremy Ladan <piclist@mit.edu> wrote:

> > Try sending 64 bytes at a time instead of 8; see if that helps.
> 
> Unfortunately, the PIC16C745/765 's only allow 8 bytes at a time. I
> think tomorrow I'll be deciding between using the 18 series of PICs
> or maybe another solution.

Jeremy:

Although the USB spec limits low-speed interrupt endpoints to only 8 
bytes per packet, a transfer can be spread over multiple packets.  If 
you send 64 bytes per transfer, your PC will use its fancy scheduling 
algorithms to send the data as efficiently as possible.

-Andrew

=== Andrew Warren -- aiw@cypress.com
=== Principal Design Engineer
=== Cypress Semiconductor Corporation
=== (but open to offers)


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