Read a RFID Card using Wiegand protocol

[vitalianoneto]

Hi,

I'm trying to read a RFID Card using the Wiegand protocol, but I couldn't make the pin to read the Input fast as the Wiegand requires.

Other alternative is to set 2 pins to Interrupt mode, but I don't know how to do this in C/C++.

Has anyone used the A20 to use IO fast, in the microseconds scale?


Thanks in advance,
Vitaliano

[MBR]

There is an article about Fast GPIOS already - see https://www.olimex.com/forum/index.php?topic=436.0.