Hi folks, I need to use the interrupt pins on the uno for serial communication with a GPS as well as handling input from an RC receiver.
What is not clear to me is the UART connection on pins 0,1. These are accessible via the header, and today I successfully connected my GPS chip (MTK3329) to them and got it talking. Software-wise, I'm using bits of the ardupilot project's library for testing.
So how are these pins at the header connected to both the atmega328, and the USB-Serial chip? I got my GPS to work OK, AND was able to print text back to the Arduino serial monitor OK, which I didn't quite expect. I'm assuming that I can use pins 0,1 in my project without concern for the USB-Serial connection. Is this OK? The board description at http://arduino.cc/en/Main/ArduinoBoardUno isn't clear.