I was trying to connect the imx6q-sabresd board to a rs232 devices via uart3.
The BSP version is L3.0.35_4.1.0_130816 with Android 4.3.
Now, I can test uart3 by typing
echo "test" > /dev/ttymxc2
But it can't receive data when I test it by using serial port console app.
Is there anyone can help on this case?