Very dumb question so please bear with me! I got the Teensy ++ 2 board. I comes with built in Analog to Digital converter (ADC) . Does that mean it automatically converts? should i still write code for converting an analog input to digital output? using arduino (which you can run on teensy)you have the option analogread/write and same as digital , so do i still need code for adc?
Each time you want the ADC to measure the voltage on one of the analog input pins, you need to use analogRead() in your sketch to make it do so. It only does the conversions when you use analogRead(), not automatically.
This is exactly the same as on a regular Arduino board.