AVR-Chat

On 9 Sep 2005 at 17:56, Philipp Adelt wrote:

> Dennis Clark schrieb:
> > Can you buy it anywhere?  It sure sounds nice.  I like the fact that it 
> > is using the FTDI chip, and the parallel one so that it doesn't have the
> > serial port limitations on speed.  BUT, are there drivers for it for the
> > Macintosh that allows me to use it with AVRdude there?
> > 
> > DLC
> 
> I know it's not nice to start with an OT-thread but this bugs me right 
> now: My FT2232C in FIFO mode allows sending with around 4µs cycle time 
> for one byte (burst, unoptimized code on an ATmega128@16MHz in busy loop 
> being the limiting factor), which would be around 2MBit/s - sounds 
> reasonable.
> But it seems to take some time off every now and then to do USB 
> transfers - a quick benchmark against a PC receiving showed something 
> around 40-50kbyte/s aka 0,4Mbit/s throughput on average!?
> 
> So when you say "it doesn't have the serial port limitations on speed" - 
>   what *realistic* throughput has anyone seen on a 245BM/FT232C in FIFO 
> mode yet? The data sheet says "up to 1Mbyte/s" IIRC.
> 
> Philipp
> 

	I have a client using the FT232 at 921600bps with an ATmega128 @ 14.7456MHz 
and a VB6 program running on the PC side. He just transfers 3kByte files every 
minute, so I have never measured the throughput.

	Mark Jordan