Programming 32-bit Microcontrollers in C

Day 11 It’s an Analog World

The Plan

We live in an analog world. Temperature, humidity, and pressure but also voltages and currents are analog. If we want our embedded-control applications to interact with the outside world, we need to learn to interpret analog information and convert it to digital so that a microcontroller can elaborate it and possibly produce an analog output again. The analog-to-digital converter module is one of the key interfaces to the “real” world. The PIC32MX family was designed with embedded-control applications in mind and therefore is ideally prepared to deal with the analog nature of this world. A fast analog-to-digital converter (ADC), capable of 500,000 conversions per second, is available on all models with ...