I am trying to communicate with the Wacom tablet using their eval board. I am trying to use ttyS2 to communicate with the wacom tablet but after setting up the port using :

echo "AF2 in" > /proc/gpio/GPIO46

echo "AF1 out" > /proc/gpio/GPIO47


stty -ixon clocal  cs8 -parenb -cstopb -crtscts -echo -F /dev/ttyS2

stty -F /dev/ttyS2 speed 19200


Then I use:



echo "1" > /dev/ttyS2

cat /dev/ttyS2


I get nothing from the tablet. 

Does anybody have any ideas about how to get this port working correctly with the wacom tablet?