Re: [avrdude-dev] Serial port latency under linux (and windows?)

[Joerg Wunsch]

As Jan-Hinnerk Reichert wrote:

> The possible trigger levels for 16C550 are 1, 4, 8 and 14. Linux sets trigger 
> level depending on the baudrate. 1 for speeds below 2400 Baud, 8 otherwise.
> 
> A quick calculation shows that this is the amount of time missing (7 bytes 
> instead of 3 ;-)

In short: challenge-response protocols suck.  Even 20-year old UUCP
had realized that, and implemented a windowed protocol...  Of course,
with the AT90S1200 of the AVR910, there's no chance to do that, the
device is full anyway.

I'll eventually solder a Q&D AVR910 together some day, and will also
give that a try under FreeBSD (and maybe test it on Solaris as well,
if i get around).

-- 
J"org Wunsch                                           Unix support engineer
address@hidden        http://www.interface-systems.de/~j/