Thread: i2c Smartcard-Reader TOH
View Single Post
kimmoli's Avatar
kimmoli is offline kimmoli
2014-05-17 , 10:44
Posts: 562 | Thanked: 2,744 times | Joined on Dec 2013 @ Espoo, Finland
#7
Originally Posted by inte View Post
As far as I understand, PS/2 is only needed for power and not for data. It would therefore only be necessary to somehow interface serial to i2c.
That omnikey 3111 does take power from PS2 connector , and for communications it uses RS-232 serial port.

Originally Posted by inte View Post
I also came across this reader: http://www.horter.de/i2c/i2c-chipkar...pkarten_1.html which seems to be genuine i2c. No idea if it supports OpenPGP/Basiccards nor if it is supported by gnupg/ccid or pcscd, though.
This is just a smart-card "connector" which supports only I2C based smart-cards (which can be quite directly connected to jolla, through a level converter possibly.) The smart-card is atually a EEPROM memory device.

Originally Posted by inte View Post
I thought i2c is somehow a serial interface, maybe it is the best to start with a supported serial reader if connection to i2c is feasible.
I2C is a serial interface, but it has nothing more to do with e.g. PC serial port or USB

To interface with all kind of smartcards, the omnikey 3111 seems plausible,but you would need something like http://talk.maemo.org/showthread.php?t=92382 and step-up DCDC converter to 5V power.

But to start with I2C smart-cards, you'll need to know supported voltage of the card, if it is 1.8V or 3.3V then you can connect it to phone with e.g. MyHalf circuitry.
__________________
TOH ideas, concepts and creations since 2013 toholed tohuart toheink Heebo tohIRi i2ctool tohmm LeTOH FMTOH