On Monday, March 18, 2002, at 05:35 AM, Oleg Svirgstin wrote:
Dear all,
Sorry!
1. Is it correct that IOUSBDEVICE_FUNCS_180, 182 and 183 denote version
of
USB? (USB Spec I use describes USB 1.1, is it what would be 110 in the
above
or it is a different novel?). I don't ask about IOUSBINTERFACE_FUNCS_XXX
hoping of the same meaning of their _XXX. Or is it just "version of
DeviceInterface and InterfaceInterface functions?
Not general version of USB, but internal version numbers of Apple's USB
implementation, AFAIK. All of these functions relate to USB 1.1
2. Is there a way (other than trying to access ID183 first, on failure
trying ID182 and finally ID180 if all else fails) to determine at
runtime
what version of these functions is available to my application? I could
of
course check for system version, that is the reason for the third
question
Not sure I'll look into this, maybe one of the guys from Apple can give
you a quick straight answer tho ;)
3. So far I know that 1.8 corresponds to 10.0, 1.8.1 corresponds to
10.0.1...
Is it correct that 1.8.2 is available in 10.0.2, 1.8.3 in 10.0.3 and so
on?
Does it mean that routines from 1.8.2 should be absolutely OK if the
user
lives under 10.1 or higher? (I need something from the 182, so in case
if
the system does not know ID182, I might inform the user that the
application
is compatible with, say, 10.0.2 or higher.)
Everyone using OS X _should_ have upgraded to 10.1 or higher and
therefore should their system should understand 1.8.3 calls (in fact
1.8.3 . IMHO it would be best (if you need these newer functions) to
return an error if any of the newer calls return an !=kIOReturnSuccess
and as you say, inform the user to upgrade. I don't think the
relationship between version numbers of OS X USB and OS X itself is as
straightforward 1.8.1 = 10.0.1; 1.8.2 = 10.0.2; 1.8.3 = 10.0.3 etc. Best
to just assume use of 10.1 and therefore inclusion of USB 1.8.3 and the
various USB bugfixes (see the relevant technotes on fixes included with
the various OS X updates).
Hope this info & opinions helps (and is correct).
Thanks in advance
Oleg
PS By the way, "hotblack" asked few days ago a question I was about to
ask.
Thanks to those who replied... And special thanks to hotblack for
saving my
keyboard and fingers from excessive wear! Just imagine: I got immediate
and
very useful response!
Heh, glad to be of service ;)
ben
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