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Unit 6: Analog I/O and Process Control

Unit 6 Labs

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1. Introduction

The purpose of this laboratory exercise is to investigate applications of embedded controllers to real time control algorithms that employ analog inputs and analog outputs. You will use a computer algorithm to implement a closed-loop processor fro motor speed control. You will see how feedback can be used to linearize an inherently nonlinear process and result in zero steady state control error.

2. Objectives

  • Generate PWM outputs to implement variable motor supply voltage.
  • Implement a tachometer operation using PIC32 Timers.
  • Develop MPLAB X projects that implement open-loop and closed-loop motor control.
  • Develop the C program code to implement a PI controller and a moving average digital filter.
  • Manage multiple background tasks in an interrupt driven system.
  • To monitor and display data from a process running in real-time.

3. Basic Knowledge

  • Suggested reading: Embedded Computing and Mechatronics with the PIC32 Microcontroller
    • Basic circuit theory
    • Fundamentals of programming with C
  • How to configure I/O pins on a Microchip® PIC32 PPS microprocessor
  • How to implement a real-time system using preemptive foreground – background task control
  • How to generate a PWM output with the PIC32 processor
  • How to configure the Analog Discovery to display logic traces
  • How to implement the design process for embedded processor based systems

4. Equipment List

4.1. Hardware

In addition, we suggest the following instruments:

4.2. Software

The following programs must be installed on your development workstation:

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