Hi Harald,

 

your response got me thinking and it turned out that I was wrong concerning the card communication and the T0 protocol.

 

The card communication I wanted to trace was between a reader and an unknown (possible SLE4442) memory card.

I used a HID card reader and communicated with the card via PCSC and the T0 protocol. The commands I used were the PCSC memory card commands. Hence I always assumed that the communication with the card is T0 since this is what I used to talk to the card. I was also puzzled since the card appeared to be an SLE4442 card, but the protocol I had to use to talk to the card was not the one defined in the SLE4442 datasheet.

 

Since I was not sure if the card is really a SLE4442, I used a logic analyzer to have a look at the direct communication between card and reader. What I didn't know and subsequently discovered was that in reality I was only communicating with the PCSC layer (and thus not with the card directly) using the PCSC memory card commands and the T0 protocol, while the reader itself actually used the SLE4442 protocol that is defined in the datasheet. Since the SLE4442 protocol is not T0, simtrace couldn't trace anything.

 

If anyone else reads this and also wants to trace memory card (e.g. SLE4442) communication I can recommend using a logic analyzer (i.e. low cost USB tool) and sigrok. Sigrok also has a SLE4442 decoder, so you trace any ongoing communication just fine.

 

 

Thank you for your hint!

 

Melvin