simtrace on Mac OSX

Lukas Kuzmiak lukash at
Mon Oct 3 21:47:19 CEST 2011


I can confirm this problem on my fresh OS X 10.7 (Lion) installation.

The IRQ storm bug you're referring to was caused by TCK byte difference
between T=1 and T=0 protocols and has been fixed in firmware 0.2 (
This however should not be related I guess as if you connect the simtrace
without a phone and simcard attached to it, this bug should not trigger
(correct me if i'm wrong).

to debugging: you can use a serial cable connected to the 2.5" jack
(something like FTDI based one for osmocom motorola phones if you have one)
- that's the debugging interface. I'm currently travelling and don't have my
usb->serial cable with me so I will check back at home.


On Mon, Oct 3, 2011 at 8:29 PM, Peter Stuge <peter at> wrote:

> Holger Hans Peter Freyther wrote:
> > > Mac OS is really really strict about USB descriptors being correct,
> > > where both Windows and Linux are more lenient. But the error messages
> > > say the device would not even accept the address it was assigned, so
> > > there is some more fundamental problem with the USB firmware. :\
> >
> > any debug hints? it will be my first real adventure into the USB
> > land. Right now I would just play trial and error to see how far in
> > the setup things go.
> The device address being assigned by the PC is very very early in the
> USB enumeration (device discovery after plug-in) process, so
> something goes wrong pretty early.
> I understood that the firmware is based on an example firmware from
> Atmel, so maybe look around their developer resources for any info
> about known problems with Mac OS.
> I would probably add some serial output to the firmware in main() and
> in the USB interrupt handler, and try to see what differs between Mac
> OS and other systems during enumeration.
> I recall Harald mentioned an interrupt storm in some circumstances,
> this could also cause the device address assignment to fail if it
> isn't fixed already.
> //Peter
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