[time-nuts] Needed: The Real Serial USB Fix

[Jim Lux]

On 1/27/13 11:01 AM, Bob Bownes wrote:
> There are some well documented issues with timing and USB that have been
> rehashed here a few times.
>
Sure, the timing isn't really , really predictable  (8kHz frame rate and 
all that).. but assuming you're just controlling something where you 
need 10s or 100s of millisecond timing and shoving data back and forth..



>
> On Sun, Jan 27, 2013 at 1:48 PM, Jim Lux <jimlux at earthlink.net> wrote:
>
>> On 1/27/13 9:30 AM, Peter Gottlieb wrote:
>>
>>> At work we simply use multi port serial cards (*no* USB intermediary) or
>>> Ethernet to serial adapters.  Any use of USB for critical test equipment
>>> was pretty much banned here years ago.
>>>
>>>
>>>   Why the proscription against USB?
>> Because of difficulty with USB device drivers? Or the plethora of serial
>> port emulators that have unforeseen interactions with software that thinks
>> it's talking to a real serial port? or what?
>>