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