I am making a simple touch screen to HID mouse adapter to avoid having to create a device driver. The touch screen commmunicates using RS-422. I know that the touch screen is reporting, because I can read it through the USB adapter connected to my computer. However the Micro does not see anything.
The code that I am using for now is the simple Mega example that passes data back and forth between Serial and Serial1. The code is compiled on Windows 8.1 with IDE v1.0.5-r2 and gcc 3.4.2.
The schematic for the ciruit that I am using is attached. The ic is a MAX491, the capacitor is 0.1uF ceramic, and the resistor is a 120 ohm 1/4 W 1% resistor.
Can someone look at the schematic and see if I am missing something, or if their is an issue with my setup (Windows 8.1 is a pain, but I love my surface).