On Apr 8, 2009, at 4:07 PM, Gene Heskett wrote: > On Wednesday 08 April 2009, Mike Hansen wrote: >> Quick FYI: >> >> >> >> The FTDI USB UARTs have noise immunity issues. They tend to lock >> up after >> running for an hour or so. And worst of all they only reset >> themselves >> when the USB cable has been physically removed. It's a well known >> problem. >> I would avoid this chip for new designs. >> > I could almost argue the point about FTDI stuff. I'm also on the > heyu list, > where a couple of years ago we became aware that 99% of the adapter > problems > heyu was having (and coincidentally the apcupsd list found the same) > were > related to the user using a PL2303 based adapter. So we started > telling the > newbies to bin them and get FTDI stuff, because it Just Works(TM). > And it > does, there are 5 or 6 of them in this system right now, and they are > dependable and 100% transparent.
On out development boards we dropped the prolific devices because their OS-X drivers would cause kernel panics. Switched to the FTDI 232R devices and have never looked back. The few folks here, that hate the FTDI chips want a 16550 UART. I have had issues occasionally, but usually trace that to a non compliant $5 USB hub. Steve > > > 2 of the ones I am using are booster hubs on the other end of 16 > foot cables. > Nary a hiccup in a years use. Mother nature blew one of them all to > hell, but > when the systems are 25 feet apart, the EMP from a nearby strike can > do heavy > duty things to electronics. > >> Suggest looking at something from SiLabs. >> >>> Date: Wed, 8 Apr 2009 17:32:08 -0400 >>> From: [email protected] >>> To: [email protected] >>> CC: [email protected] >>> Subject: Re: gEDA-user: FT232R >>> >>> >>> Ah, the perils of open source. With proprietary software, your >>> problem is not enough symbols. With open source, your problem is too >>> many. >>> >>> >>> _______________________________________________ >>> geda-user mailing list >>> [email protected] >>> http://www.seul.org/cgi-bin/mailman/listinfo/geda-user >> >> _________________________________________________________________ >> Rediscover Hotmail®: Get quick friend updates right in your inbox. >> http://windowslive.com/RediscoverHotmail?ocid=TXT_TAGLM_WL_HM_Rediscover_Upd >> ates1_042009 > > > -- > Cheers, Gene > "There are four boxes to be used in defense of liberty: > soap, ballot, jury, and ammo. Please use in that order." > -Ed Howdershelt (Author) > It is not good for a man to be without knowledge, > and he who makes haste with his feet misses his way. > -- Proverbs 19:2 > > > > _______________________________________________ > geda-user mailing list > [email protected] > http://www.seul.org/cgi-bin/mailman/listinfo/geda-user _______________________________________________ geda-user mailing list [email protected] http://www.seul.org/cgi-bin/mailman/listinfo/geda-user
