delay in SIM reader interrupt handler

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Dieter Spaar spaar at
Tue Nov 1 13:07:35 UTC 2011

Hello Andreas,

On Tue, 01 Nov 2011 12:28:05 +0100, "jolly" <andreas at> wrote:
> i removed the delay, and it works. i checked the tsm30 source code. it
> also sets the IO to input right after writing the last TX byte. (i guess
> that the controller will trigger the IO switching at the end of
> transmission.) so why do we need that delay? are there any problems?

I can't tell you exactly what went wrong (it was months ago that I
worked on this part). But most certainly one of my Test SIMs did 
not work without this delay. So I would suggest to leave a comment 
at this place in case problems with certain SIMs occur.

Best regards,
Dieter Spaar, Germany                           spaar at

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