simtrace May 2014

simtrace@lists.osmocom.org

2 discussions

Incomplete trace (due to high-speed SIM?)
by Min Xu 19 Nov '14

19 Nov '14

*Holger Hans Peter Freyther* holger at freyther.de <simtrace%40lists.osmocom.org?Subject=Re%3A%20Incomplete%20trace%20%28due%20to%20high-speed%20SIM%3F%29&In-Reply-To=%3C20130522102301.GP14728%40xiaoyu.lan%3E> *Wed May 22 12:23:01 CEST 2013* | On Tue, May 21, 2013 at 03:53:45PM +0200, Arthur Léna wrote: | >* I tried booting the iPhone using 2 different SIMs (this one from * | >* Free Mobile and another one) and the trace seems very short using | *>* the Free Mobile in comparison to the other one. By parsing the ATRs | *>* of both SIMs, I found out that the communication is done at 312500 | *>* bits/s with the Free Mobile SIM and only 78125 bits/s (for a clock | *>* running at 5MHz). Could this explain the loss of entire ADPUs by the * | >* tracer? If yes, is there a way to remedy to this problem (firmware * | >* update for example). *| Some people reported success by reducing the size of buffered bytes in the | firmware. | holger Holger There appears to be numerous references to "decrease the buffer in the firmware" to workaround the problem of losing bytes... but can you clarify which buffer to decrease, in which source file? I am guessing it's the req_ctx.c / req_ctx.h? Thanks

7 19

Fast SIM cards loosing bytes
by Dean Chester 25 Jun '14

25 Jun '14

Hi, I see earlier in the archives that reducing the buffer size in the firmware will resolve this. Hasn't this already been done though in new releases of the firmware? As I have pulled the latest version from the openpcd git repo and built it. If not what have people reduced the buffer size to? And has it had any fixes? Sent from my iPad

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simtrace May 2014