Re: gEDA-user: FT232R

[Steven Michalske <smichalske@xxxxxxxxx>]

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: dj@xxxxxxxxxxx
>>> To: geda-user@xxxxxxxxxxxxxx
>>> CC: MrUmunhum@xxxxxxxxxxx
>>> 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.
>>>
>>>
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>>
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>
>
> -- 
> 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
>
>
>
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