USB Model M

Alexandre Souza alexandre-listas at
Thu Dec 18 01:44:03 CST 2008

> I have a small uC device that I made that uses an FTDI USB->TTL 
> converter.  I wish USB was as straight-forward as you describe.  I'm 
> currently running into problems when transferring, very quickly, some 
> data from the uC to the PC.  The problems are related to overrunning the 
> PC, where the PC isn't scheduling reads from the device fast enough to 
> prevent drops.  At least interrupt-based I/O can "demand" attention from 
> the cpu at any time, where USB is at the mercy of being scheduled.

    I do that at 921kbps and had no issues. 

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