Hi all!

I'm working with ATMEL89S52 (a 8052 "clone"), interfacing it with a smartcard-reader. I have read ISO7816 and I think I have understood the ATR concept and structure.

You can find documentation about ISO7816 in
www.cardwerk.com/smartcards/smartcard_standard_ISO7816-1.aspx

Now I'm trying to read the ATR from my university's card. I'm using Timer1 to have serial-com with my PC at 9600 bps, so I'm using Timer1's Interrupt to "create" a CLK signal (when Timer1's interrupt fires I do a "CPL CLK" to create the clock)

I think that my strategy isn't bad, but I can't get response from the card, only 00s. If you want to see source code (assembly) and try to help me please request it to me (petito@iespana.es)

Sorry about my bad English, and thanks to all!