用户手册 — Microchip Technology PICDEM Mechatronics Demo Board DM163029

目录

• 1.1 Introduction 7

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• 1.2 Highlights 7

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• 1.3 Quick Start Guide 8

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• 1.4 PICDEM™ Mechatronics Development Kit Contents 10

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• 1.5 PICDEM™ Mechatronics Layout 10

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• 1.6 Required Tools 12

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• 1.7 PICDEM™ Mechatronics Setup 12

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• 1.8 General PICDEM™ Mechatronics Demonstration Board Information 14

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• 2.1 Introduction 19

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• 2.2 Loading Projects in MPLAB® IDE 20

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• 2.3 Example Projects 20

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• 3.1 Introduction 47

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• 3.2 Common Problems 47

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• A.1 Introduction 49

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• B.1 Introduction 57

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  • Preface

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• 1.1 Introduction

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• 1.2 Highlights

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• 1.3 Quick Start Guide

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  • 1. Attach the leads of the Brushed DC motor to Drive 1 and Drive 2 using the screwdriver.

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  • 2. Connect POT1 (on J4) to C1- (on J13) using a wire jumper.

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  • 3. Connect P1 (on J1) to RD7 (on J10) using a wire jumper.

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  • 4. Connect N2 (on J1) to RD2 (on J10) using a wire jumper.

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  • 5. Connect the right and center pins on JP8 using a shunt.

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  • Figure 1-1: Quick Board Setup

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• 1.4 PICDEM™ Mechatronics Development Kit Contents

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  • 1. The PICDEM™ Mechatronics Printed Circuit Board (PCB) with motors

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  • 2. Pre-programmed PIC16F917 PICmicro® device

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  • 3. 10 wire jumpers

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  • 4. 8 2-pin shunts

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  • 5. CD-ROM including:

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  • 6. Sample kit including a PIC16F690 and PIC12F509 device

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  • 7. Microchip screwdriver

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  • 8. Registration Card

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• 1.5 PICDEM™ Mechatronics Layout

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  • Figure 1-2: PICDEM Mechatronics demo Board Hardware

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    • 1. 40-pin socket

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    • 2. 20-pin socket

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    • 3. On-board voltage regulator and power connections

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    • 4. 8 LEDs

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    • 5. 39 segment LCD connected to 14 pins on the 40-pin socket

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    • 6. RS-232 socket and associated hardware

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    • 7. Temperature sensor

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    • 8. Light sensor

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    • 9. 2 potentiometers

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    • 10. 32.768kHz crystal

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    • 11. 4 tactile switches

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    • 12. In-Circuit Debugger (ICD) connector

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    • 13. In-Circuit Serial Programming™ (ICSP™) connector

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    • 14. Over-current protection circuit with Reset switch

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    • 15. 4 half-bridge MOSFET drives with associated MOSFET drivers and logic

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    • 16. Current sense for output stage

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    • 17. Back Electromagnetic Force (EMF) sense

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    • 18. Optical Interrupter for detecting the speed of the Brushed DC motor

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    • 19. Brushed DC motor

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    • 20. Stepper motor

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    • 21. Drive screw terminals

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    • 22. 9 Vdc battery

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    • 1. You will gain knowledge and experience by physically connecting components to the microcontrol...

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    • 2. There are more peripherals than pins on the microcontrollers so that you can do more with the ...

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    • 3. Should you choose to use the board to experiment on your own, the board allows you the flexibi...

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• 1.6 Required Tools

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• 1.7 PICDEM™ Mechatronics Setup

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  • 1.7.1 Jumper Settings

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  • 1.7.2 Board Power-Up

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  • Figure 1-3: Connecting the MPLAB ICD 2 to the PICDEM Mechatronics demo Board

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  • Figure 1-4: Connecting the PICkit™ 2 to the PICDEM Mechatronics demo Board

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• 1.8 General PICDEM™ Mechatronics Demonstration Board Information

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  • 1.8.1 Experimentation

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  • 1.8.2 On-Board Status LEDs

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  • Figure 1-5: Connecting PORTC pins to LEDs for Debugging

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    • 1.8.3 Over-Current Protection Circuit

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    • 1.8.4 Motor Connection

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    • 1.8.5 Serial Communication

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    • 1.8.6 Snap-Off Sensors

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    • 1.8.7 Back EMF Scaling Resistors

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    • 1.8.8 Current Sense

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    • 1.8.9 Header/Jumper Functions

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• 2.1 Introduction

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• 2.2 Loading Projects in MPLAB® IDE

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  • 1. Start MPLAB IDE.

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  • 2. In the menu bar choose File -> Open Workspace.

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  • 3. Find the project folder.

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  • 4. Open the *.mcw file.

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  • Figure 2-1: Project Window

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• 2.3 Example Projects

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  • 2.3.1 Project 1: Hello World (Light a LED)

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    • 1. Use the PIC16F917 to read a tactile switch input.

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    • 2. Implement switch debouncing.

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    • 3. Toggle a LED when a switch is pushed.

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  • Figure 2-2: Project 1: Jumper Diagram

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  • Figure 2-3: Project 1: Schematic

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    • 2.3.2 Project 2: Dusk Indicator Using the Voltage Comparator

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      • 1. Use the internal analog comparator module.

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      • 2. Implement software hysteresis to stabilize the comparator output.

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  • Figure 2-4: Project 2: Jumper Diagram

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  • Figure 2-5: Project 2: Schematic

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    • 2.3.3 Project 3: Thermometer Using the Analog-to-Digital Converter

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      • 1. Use the Analog-to-Digital Converter module on the PIC16F917 to read the analog voltage output ...

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      • 2. Gain knowledge about the LCD module and using the LCD module worksheet.

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  • Figure 2-6: Project 3: Jumper Diagram

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  • Figure 2-7: Project 3: Schematic

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    • 2.3.4 Project 4: Digital Clock Using Timer1

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      • 1. Configure the PIC16F917 to use the 32.768kHz crystal to clock Timer1.

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      • 2. Convert Timer1 into seconds, minutes and hours.

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  • Figure 2-8: Project 4: Jumper Diagram

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  • Figure 2-9: Project 4: Schematic

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    • 2.3.5 Project 5: Brushed DC Motor Speed Control with Optical Encoder Feedback

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      • 1. Configure the CCP module to generate a PWM signal.

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      • 2. Use a PWM signal to vary the speed of a Brushed DC motor.

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      • 3. Configure Timer1 to use the optical interrupter as its clock source.

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  • Figure 2-10: Project 5: Jumper Diagram

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  • Figure 2-11: Project 5: Schematic

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    • 2.3.6 Project 6: Brushed DC Speed Control with Back EMF Feedback

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      • 1. Effectively read Back EMF using the on-board Analog-to-Digital Converter.

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      • 2. Interpret the Back EMF into a speed for the motor.

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  • Figure 2-12: Project 6: Jumper Diagram

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  • Figure 2-13: Project 6: Schematic

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    • 2.3.7 Project 7: Stepper Motor Control: Single Stepping, Half Stepping and Microstepping

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      • 1. Single-step a stepping motor.

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      • 2. Half-step the motor.

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      • 3. Micro-step the motor.

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  • Figure 2-14: Project 7: Jumper Diagram

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  • Figure 2-15: Project 7: Schematic

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    • 2.3.8 Project 8: PC Interface Using the USART

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      • 1. Use the provided PIC® MCU Communicator GUI to manipulate the I/O on the PIC16F917.

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      • 2. Understand what an auto-baud routine entails.

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  • Figure 2-16: Project 8: Jumper Diagram

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  • Figure 2-17: Project 8: Schematic

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  • Figure 2-18: PIC® MCU Communicator Interface

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    • 2.3.9 Project 9: Brushed DC Motor Control Using the ECCP

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      • 1. Configure the ECCP module for Full-Bridge mode.

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      • 2. Change motor directions.

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  • Figure 2-19: Project 9: Jumper Diagram

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  • Figure 2-20: Project 9: Schematic

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• 3.1 Introduction

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• 3.2 Common Problems

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  • 3.2.1 Vdd Is Below 5V

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  • 3.2.2 No Voltage On Drive Stage

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  • 3.2.3 FAULT LED Stays On Or Continues To Trip When SW5 Is Pressed

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  • 3.2.4 Microcontroller Does Not Run After Programming By The MPLAB ICD 2

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  • Figure 3-1: Release From Reset Button

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    • 3.2.5 Back EMF At J16 Is Floating

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    • 3.2.6 Board Is Non-Functional When Microcontrollers Are Installed In Both U1 And U2

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    • 3.2.7 Optical Interrupter Is Not Providing The Expected Feedback

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    • 3.2.8 Serial Communication Does Not Appear To Be Working

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• Appendix A. Hardware Schematics

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• A.1 Introduction

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  • Figure A-1: Schematic Diagram (Page 1 of 7)

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  • Figure A-2: Schematic Diagram (Page 2 of 7)

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  • Figure A-3: Schematic Diagram (Page 3 of 7)

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  • Figure A-4: Schematic Diagram (Page 4 of 7)

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  • Figure A-5: Schematic Diagram (Page 5 of 7)

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  • Figure A-6: Schematic Diagram (Page 6 of 7)

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  • Figure A-7: Schematic Diagram (Page 7 of 7)

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• Appendix B. LCD Segment Mapping Worksheet

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• B.1 Introduction

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  • Appendix B: LCD Segment Mapping Worksheet

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• Worldwide Sales and Service

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