DOCSLIB.ORG

COOLANT OIL CONTROL SYSTEM in VMC MACHINE ”Is the Bonafide Work Of

Total Page：16

File Type：pdf, Size：1020Kb

Download full-text PDF Read full-text
COOLANT OIL CONTROL SYSTEM in VMC MACHINE ”Is the Bonafide Work Of COOLANT OIL CONTROL SYSTEM IN VMC MACHINE A PROJECT REPORT Submitted by RAJAGANAPATHY.S (13BEI111) GOWTHAMVEL.P (13BEI018) SANTHOSE PRABU.R (13BEI050) in partial fulfillment for the award of the degree of BACHELOR OF ENGINEERING in ELECTRONICS AND INSTRUMENTATION ENGINEERING KUMARAGURU COLLEGE OF TECHNOLOGY (An Autonomous Institution, Affiliated to Anna University,Chennai) COIMBATORE 641049 APRIL 2017 1 COOLANT OIL CONTROL SYSTEM IN VMC MACHINE A PROJECT REPORT Submitted by RAJAGANAPATHY.S (13BEI111) GOWTHAMVEL.P (13BEI018) SANTHOSE PRABU.R (13BEI050) in partial fulfillment for the award of the degree of BACHELOR OF ENGINEERING in ELECTRONICS AND INSTRUMENTATION ENGINEERING KUMARAGURU COLLEGE OF TECHNOLOGY (An Autonomous Institution, Affiliated to Anna University,Chennai) COIMBATORE 641049 APRIL 2017 2 BONAFIDE CERTIFICATE Certified that this project report “COOLANT OIL CONTROL SYSTEM IN VMC MACHINE ”is the bonafide work of RAJAGANAPATHY.S (13BEI111) GOWTHAMVEL.P (13BEI018) SANTHOSE PRABU.R (13BEI050) who carried out the project work under my supervision. SIGNATURE SIGNATURE Dr.N.EZHILARASI Mr.S.SARAVANA KUMAR HEAD OF THE DEPARTMENT SUPERVISOR Dept. of Electronics and Instrumentation Assistant Professor Kumaraguru College of Technology Dept. of Electronics and Instrumentation Coimbatore-641049 Kumaraguru College of Technology Coimbatore-641049 The candidates were examined by us in the project viva voce examination held on INTERNAL EXAMINER EXTERNAL EXAMINER 3 ACKNOWLDEGEMENT The satisfaction that accompanies the successful completion of any task would be incomplete without mentioning about the people whose constant guidance and encouragement crowns all effort with success. We are greatly indebted to our beloved Principal Dr.R.S.KUMAR, who has been the backbone of all our deeds. We express our gratitude to Dr.N.EZHILARASI, Head, Department of Electronics and Instrumentation Engineering, Kumaraguru College of Technology for her constant encouragement. We take immense pleasure to record our heartfelt gratitude to our esteemed project coordinator and our project guide Mr.S.SARAVANA KUMAR, Assistant Professor, Department of Electronics and Instrumentation Engineering,for her valuable guidance,timely help,constant encouragement and advice rendered throughout the project period for the successful completion of project. We are grateful to the faculty members of the Department of Electronics and Instrumentaion Engineering , who have helped us in innumerable ways.We also thank our parents without whom we could not have come so far and friends for their timely help that culminated as good in the end. 4 ABSTRACT Most of the automation and precision machine tools industries are using automation systems for all kind of their operations. Although some simple and very most important operations are done by manually .By that way nowadays Coolants in VMC machine are controlled manually, in this project we are proposing an idea of automatic control of coolant oil in a VMC machine by measuring the level of coolant oil from its tank. Relating the level of coolant oil with the set point the controller will drain the coolant or fill the coolant in the machine. In this project we are going to rectify the problems when doing the manual operations in coolant oil tank in VMC machine. During the precision machining operations the most of the automation machines are producing high temperature. So this will cause heavy damages in machine tools as well as decrease the production in precision machining industries. So we are introducing the temperature monitoring system in VMC machine for displaying the operator by immersing the temperature sensor into the coolant oil tank. It can continuously monitor the temperature range of the coolant oil in the machine tank. This coolant oil automation system will help to reduce the manual problems from the coolant oil transferring in precision machining industries and also increase the life time of the machine tools. By using the limit switches as the level sensor we have reduced the cost of the system. 5 TABLE OF CONTENTS CHAPTER NO TITLE PAGE NO ABSTRACT LIST OF TABLES LIST OF FIGURES LIST OF ABBREVIATIONS 1 INTRODUCTION 9 2 HARDWARE DESCRIPTION 10 2.1 Dc Motor 10 2.1.1 Electromagnetic motors 10 2.1.2 Brushed motor 12 2.1.3 Brushless motor 13 2.1.4 Uncommutated 13 2.1.5 Permanent magnet stators 14 2.1.6 Wound stators 15 2.2 Limit Switch 17 2.3 PIC Microcontroller 18 2.3.1 Device families 20 2.3.2 Core architecture 28 2.3.3 Hardware features 35 2.3.4 Development tools 36 2.3.5 Device programmers 37 2.3.6 Operating systems 39 2.3.7 Clones 39 2.4 Power Supply 43 2.4.1 DC power supply 44 2.4.2 AC-to-DC supply 44 2.4.3 Linear regulator 45 2.4.4 AC power supply 45 6 2.4.5 Switched mode power supply 46 2.4.6 Programmable power supply 47 2.4.7 Uninterruptible power supply 48 2.4.8 High voltage power supply 48 2.5 Pump 49 2.5.1 Positive displacement pump 51 2.5.2 Impulse pumps 59 2.5.3 Velocity pumps 60 2.5.4 Gravity pumps 62 2.5.5 Steam pumps 62 2.5.6 Valveless pumps 63 2.6 Solenoid Valve 64 2.6.1 Operations 64 2.6.2 Internally piloted 65 2.7 Flow Chart 67 3 RESULTS 68 4 CONCLUSION 71 REFERENCE 71 LIST OF FIGURES 2.1 Image of Limit Switch 18 2.2 Image of PIC Microcontroller 42 2.3 Circuit diagram of Power Supply 49 2.4 Image of Pump 63 2.5 Image of Solenoid Valve 66 7 2.6 Flow chart 67 3.1 Proteus output of Pump ON 68 3.2 Proteus output of Pump OFF 68 3.3 Proteus output of SV2 ON 69 3.4 Proteus output of SV2 OFF 69 3.5 Milling stop 70 LIST OF ABBREVIATIONS PIC Peripheral Interface Controller DC Direct Current PM Permanent Magnet EMF Electro Magnetic Force RAM Random Access Memory ALU Arithmetic Logic Unit CPU Central Processing Unit PVC Poly Vinyl Chloride ROM Read Only Memory 8 1. INTRODUCTION In this project we are going to rectify the problems when doing the manual operations in coolant oil tank in VMC machine. During the precision machining operations the most of the automation machines are producing high temperature. So this will cause heavy damages in machine tools as well as decrease the production in precision machining industries. So we are introducing the temperature monitoring system in VMC machine for displaying the operator by immersing the temperature sensor into the coolant oil tank. It can continuously monitor the temperature range of the coolant oil in the machine tank. This coolant oil automation system will help to reduce the manual problems from the coolant oil transferring in precision machining industries and also increase the life time of the machine tools. 9 2.HARDWARE DESCRIPTION 2.1 DC MOTOR A DC motor is any of a class of rotary electrical machines that converts direct current electrical energy into mechanical energy. The most common types rely on the forces produced by magnetic fields. Nearly all types of DC motors have some internal mechanism, either electromechanical or electronic, to periodically change the direction of current flow in part of the motor. DC motors were the first type widely used, since they could be powered from existing direct-current lighting power distribution systems. A DC motor's speed can be controlled over a wide range, using either a variable supply voltage or by changing the strength of current in its field windings. Small DC motors are used in tools, toys, and appliances. The universal motor can operate on direct current but is a lightweight motor used for portable power tools and appliances. Larger DC motors are used in propulsion of electric vehicles, elevator and hoists, or in drives for steel rolling mills. The advent of power electronics has made replacement of DC motors with AC motors possible in many applications. 2.1.1 ELECTROMAGNETIC MOTORS A coil of wire with a current running through it generates an electromagnetic field aligned with the center of the coil. The direction and magnitude of the magnetic field produced by the coil can be changed with the direction and magnitude of the current flowing through it. A simple DC motor has a stationary set of magnets in the stator and an armature with one or more windings of insulated wire wrapped 10 around a soft iron core that concentrates the magnetic field. The windings usually have multiple turns around the core, and in large motors there can be several parallel current paths. The ends of the wire winding are connected to a commutator. The commutator allows each armature coil to be energized in turn and connects the rotating coils with the external power supply through brushes. (Brushless DC motors have electronics that switch the DC current to each coil on and off and have no brushes.) The total amount of current sent to the coil, the coil's size and what it's wrapped around dictate the strength of the electromagnetic field created. The sequence of turning a particular coil on or off dictates what direction the effective electromagnetic fields are pointed. By turning on and off coils in sequence a rotating magnetic field can be created. These rotating magnetic fields interact with the magnetic fields of the magnets (permanent or electromagnets) in the stationary part of the motor (stator) to create a force on the armature which causes it to rotate. In some DC motor designs the stator fields use electromagnets to create their magnetic fields which allow greater control over the motor. At high power levels, DC motors are almost always cooled using forced air.
Load more

Recommended publications
  • Programming-8Bit-PIC
    Foreword Embedded microcontrollers are everywhere today. In the average household you will find them far beyond the obvious places like cell phones, calculators, and MP3 players. Hardly any new appliance arrives in the home without at least one controller and, most likely, there will be several—one microcontroller for the user interface (buttons and display), another to control the motor, and perhaps even an overall system manager. This applies whether the appliance in question is a washing machine, garage door opener, curling iron, or toothbrush. If the product uses a rechargeable battery, modern high density battery chemistries require intelligent chargers. A decade ago, there were significant barriers to learning how to use microcontrollers. The cheapest programmer was about a hundred dollars and application development required both erasable windowed parts—which cost about ten times the price of the one time programmable (OTP) version—and a UV Eraser to erase the windowed part. Debugging tools were the realm of professionals alone. Now most microcontrollers use Flash-based program memory that is electrically erasable. This means the device can be reprogrammed in the circuit—no UV eraser required and no special packages needed for development. The total cost to get started today is about twenty-five dollars which buys a PICkit™ 2 Starter Kit, providing programming and debugging for many Microchip Technology Inc. MCUs. Microchip Technology has always offered a free Integrated Development Environment (IDE) including an assembler and a simulator. It has never been less expensive to get started with embedded microcontrollers than it is today. While MPLAB® includes the assembler for free, assembly code is more cumbersome to write, in the first place, and also more difficult to maintain.
    [Show full text]
  • Extreme Low Power (XLP) PIC® Microcontrollers
    XLP PIC® MCUs eXtreme Low Power (XLP) PIC® Microcontrollers www.microchip.com/xlp Looking Beyond Low-Power MCUs Microchip’s XLP PIC® MCUs As more wearables, wireless sensor networks, and other Internet of Things (IoT) enabled smart devices are getting powered from battery, energy conservation becomes paramount. Today’s connected appli- cations must consume little power and, in extreme cases, last for up to 20+ years while running from a single battery. To enable applica- tions like these, products with Microchip’s eXtreme Low Power (XLP) technology offer the industry’s lowest Run and Sleep currents. Benefits of XLP PIC MCUs Low Sleep Currents Battery-Friendly VBAT Battery Back-Up Large Portfolio of XLP with Flexible Wake-Up Features • Automatic switch-over MCUs Sources • Enable battery lifetime upon loss of VDD • 8–121 pins, • Sleep current down greater than 20 years • Maintains Real-Time 4 KB–1 MB Flash to 9 nA • Low-power supervisors Clock/Calendar (RTCC) • Wide selection of • Brown-Out Reset (BOR) for safer operation and user registers packages down to 45 nA (BOR, WDT) • Powered seperately • Active mode currents as • Real-time clock down to • Core Independent Pe- from 1.8–3.6V source low as 30 µA/MHz with 300 nA ripherals (CIPs) take the (coin cell) efficient instruction set • Watch-Dog Timer (WDT) load off the CPU and per- with over 90% single- down to 200 nA form extremely complex cycle instructions tasks in self-sustaining mode at lowest possible energy requirement XLP PIC MCU Application Examples Internet of Things Smart Energy
    [Show full text]
  • MPLAB XC8 PIC Assembler User's Guide
    MPLAB® XC8 PIC® Assembler User's Guide Notice to Customers All documentation becomes dated and this manual is no exception. Microchip tools and documentation are constantly evolving to meet customer needs, so some actual dialogs and/or tool descriptions can differ from those in this document. Please refer to our web site (https://www.microchip.com) to obtain the latest documentation available. Documents are identified with a “DS” number. This number is located on the bottom of each page, in front of the page number. The numbering convention for the DS number is “DSXXXXXA,” where “XXXXX” is the document number and “A” is the revision level of the document. For the most up-to-date information on development tools, see the MPLAB® IDE online help. Select the Help menu, and then Topics to open a list of available online help files. © 2020 Microchip Technology Inc. User Guide DS50002974A-page 1 Table of Contents Notice to Customers.......................................................................................................................................1 1. Preface....................................................................................................................................................4 1.1. Conventions Used in This Guide..................................................................................................4 1.2. Recommended Reading...............................................................................................................5 1.3. Document Revision History..........................................................................................................5
    [Show full text]
  • Embedded Systems Building and Programming Embedded Devices
    Embedded Systems Building and Programming Embedded Devices PDF generated using the open source mwlib toolkit. See http://code.pediapress.com/ for more information. PDF generated at: Tue, 29 May 2012 01:04:04 UTC Contents Articles Wikibooks:Collections Preface 1 Embedded Systems/Embedded Systems Introduction 3 Embedded Systems/Terminology 7 Microprocessor Basics 10 Embedded Systems/Microprocessor Introduction 10 Embedded Systems/Embedded System Basics 11 Embedded Systems/Microprocessor Architectures 13 Embedded Systems/Programmable Controllers 16 Embedded Systems/Floating Point Unit 18 Embedded Systems/Parity 20 Embedded Systems/Memory 21 Embedded Systems/Memory Units 24 Programming Embedded Systems 25 Embedded Systems/C Programming 25 Embedded Systems/Assembly Language 31 Embedded Systems/Mixed C and Assembly Programming 34 Embedded Systems/IO Programming 42 Embedded Systems/Serial and Parallel IO 43 Embedded Systems/Super Loop Architecture 44 Embedded Systems/Protected Mode and Real Mode 46 Embedded Systems/Bootloaders and Bootsectors 47 Embedded Systems/Terminate and Stay Resident 48 Real Time Operating Systems 49 Embedded Systems/Real-Time Operating Systems 49 Embedded Systems/Threading and Synchronization 51 Embedded Systems/Interrupts 54 Embedded Systems/RTOS Implementation 55 Embedded Systems/Locks and Critical Sections 57 Embedded Systems/Common RTOS 60 Embedded Systems/Common RTOS/Palm OS 63 Embedded Systems/Common RTOS/Windows CE 64 Embedded Systems/Common RTOS/DOS 64 Embedded Systems/Linux 65 Interfacing 68 Embedded Systems/Interfacing
    [Show full text]
  • An Open-Source Platform for Learning Embedded Systems Based on Algorithm Visualizations and Digital Signal Controllers
    electronics Article DSCBlocks: An Open-Source Platform for Learning Embedded Systems Based on Algorithm Visualizations and Digital Signal Controllers Jonathan Álvarez Ariza Department of Electronics Technology, Engineering Faculty, Corporación Universitaria Minuto de Dios (UNIMINUTO), 111021 Bogotá, Colombia; [email protected]; Tel.: +57-310-557-9255 Received: 17 January 2019; Accepted: 29 January 2019; Published: 18 February 2019 Abstract: DSCBlocks is an open-source platform in hardware and software developed in JavaFX, which is focused on learning embedded systems through Digital Signal Controllers (DSCs). These devices are employed in industrial and educational sectors due to their robustness, number of peripherals, processing speed, scalability and versatility. The platform uses graphical blocks designed in Google’s tool Blockly that can be used to build different Algorithm Visualizations (AVs). Afterwards, the algorithms are converted in real-time to C language, according to the specifications of the compiler for the DSCs (XC16) and they can be downloaded in one of the two models of development board for the dsPIC 33FJ128GP804 and dsPIC 33FJ128MC802. The main aim of the platform is to provide a flexible environment, drawing on the educational advantages of the AVs with different aspects concerning the embedded systems, such as declaration of variables and functions, configuration of ports and peripherals, handling of Real-Time Operating System (RTOS), interrupts, among others, that are employed in several fields such as robotics, control, instrumentation, etc. In addition, some experiments that were designed in the platform are presented in the manuscript. The educational methodology and the assessment provided by the students (n = 30) suggest that the platform is suitable and reliable to learn concepts relating to embedded systems.
    [Show full text]
  • Pickit 3 Programmer Application User's Guide
    PICkit™ 3 Programmer Application User’s Guide 2013 Microchip Technology Inc. DS50002158A Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. • Microchip is willing to work with the customer who is concerned about the integrity of their code. • Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.” Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act. Information contained in this publication regarding device Trademarks applications and the like is provided only for your convenience The Microchip name and logo, the Microchip logo, dsPIC, and may be superseded by updates. It is your responsibility to FlashFlex, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, ensure that your application meets with your specifications.
    [Show full text]
  • MPLAB XC8 PIC Assembler User's Guide for Embedded Engineers
    MPLAB® XC8 PIC Assembler User's Guide for Embedded Engineers Notice to Customers All documentation becomes dated and this manual is no exception. Microchip tools and documentation are constantly evolving to meet customer needs, so some actual dialogs and/or tool descriptions can differ from those in this document. Please refer to our web site (https://www.microchip.com) to obtain the latest documentation available. Documents are identified with a “DS” number. This number is located on the bottom of each page, in front of the page number. The numbering convention for the DS number is “DSXXXXXA,” where “XXXXX” is the document number and “A” is the revision level of the document. For the most up-to-date information on development tools, see the MPLAB® IDE online help. Select the Help menu, and then Topics to open a list of available online help files. © 2020 Microchip Technology Inc. User Guide 50002994A-page 1 Table of Contents 1. Preface....................................................................................................................................................4 Notice to Customers................................................................................................................................1 1.1. Conventions Used in This Guide..................................................................................................4 1.2. Recommended Reading...............................................................................................................5 1.3. Document Revision History..........................................................................................................5
    [Show full text]
  • Picmicro Mid-Range MCU Family Reference Manual
    M PICmicro™ Mid-Range MCU Family Reference Manual 1997 Microchip Technology Inc. December 1997 /DS33023A M Internationally Recognized Quality System Certifications Microchip’s Quality System embodies the requirements of ISO9001:1994. Our Microchip Chandler and Tempe Design and Manufacturing facilities have been certified to ISO 9001. The Microchip Kaohsiung Test facility, and primary Assembly houses have been certified to ISO 9002. ISO certification plans are in-process for an esti- mated certification grant by year-end 1997. In addition, Microchip has received numerous customer certifica- tions, including a Delco issued certificate of compliance to AEC-A100/QS9000. Microchip received ISO 9001 Quality System certifica- tion for its worldwide headquarters, design, and wafer fabrication facilities in January, 1997. Our field-pro- grammable PICmicro™ 8-bit MCUs, Serial EEPROMs, related specialty memory products and development systems conform to the stringent quality standards of the International Standard Organization (ISO). “All rights reserved. Copyright © 1997, Microchip Technology Trademarks Incorporated, USA. Information contained in this publication regarding device applications and the like is intended through The Microchip name, logo, PIC, KEELOQ, PICMASTER, suggestion only and may be superseded by updates. No rep- PICSTART, PRO MATE, and SEEVAL are registered resentation or warranty is given and no liability is assumed by trademarks of Microchip Technology Incorporated in the Microchip Technology Incorporated with respect to the accu- U.S.A. racy or use of such information, or infringement of patents or other intellectual property rights arising from such use or oth- MPLAB, PICmicro, ICSP and In-Circuit Serial Programming erwise. Use of Microchip’s products as critical components in are trademarks of Microchip Technology Incorporated.
    [Show full text]
  • Experience of Teaching the Pic Microcontrollers
    Session 1520 EXPERIENCE OF TEACHING THE PIC MICROCONTROLLERS Han-Way Huang, Shu-Jen Chen Minnesota State University, Mankato, Minnesota/ DeVry University, Tinley Park, Illinois Abstract This paper reports our experience in teaching the Microchip 8-bit PIC microcontrollers. The 8-bit Motorola 68HC11 microcontroller has been taught extensively in our introductory microprocessor courses and used in many student design projects in the last twelve years. However, the microcontroller market place has changed considerably in the recent years. Motorola stopped new development for the 68HC11 and introduced the 8- bit 68HC908 and the 16-bit HCS12 with the hope that customers will migrate their low- end and high-end applications of the 68HC11 to these microcontrollers, respectively. On the other hand, 8-bit microcontrollers from other vendors also gain significant market share in the last few years. The Microchip 8-bit microcontrollers are among the most popular microcontrollers in use today. In addition to the SPI, USART, timer functions, and A/D converter available in the 68HC11 [6], the PIC microcontrollers from Microchip also provide peripheral functions such as CAN, I2C, and PWM. The controller-area- network (CAN) has been widely used in automotive and process control applications. The Inter-Integrated Circuit (I2C) has been widely used in interfacing peripheral chips to the microcontroller whereas the Pulse Width Modulation (PWM) function has been used extensively in motor control. After considering the change in microcontrollers and the technology evolution, we decided to teach the Microchip 8-bit microcontrollers. 1 Several major issues need to be addressed before a new microcontroller can be taught: textbook, demo boards, and development software and hardware tools.
    [Show full text]
  • Mplab C18 C Compiler Getting Started
    MPLAB® C18 C COMPILER GETTING STARTED © 2005 Microchip Technology Inc. DS51295F Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. • Microchip is willing to work with the customer who is concerned about the integrity of their code. • Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.” Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act. Information contained in this publication regarding device Trademarks applications and the like is provided only for your convenience The Microchip name and logo, the Microchip logo, Accuron, and may be superseded by updates. It is your responsibility to dsPIC, KEELOQ, microID, MPLAB, PIC, PICmicro, PICSTART, ensure that your application meets with your specifications.
    [Show full text]
  • Pickit 2 Programmer/Debugger Overview 1.1 Introduction
    PICkit™ 2 Programmer/Debugger User’s Guide © 2008 Microchip Technology Inc. DS51553E Note the following details of the code protection feature on Microchip devices: • Microchip products meet the specification contained in their particular Microchip Data Sheet. • Microchip believes that its family of products is one of the most secure families of its kind on the market today, when used in the intended manner and under normal conditions. • There are dishonest and possibly illegal methods used to breach the code protection feature. All of these methods, to our knowledge, require using the Microchip products in a manner outside the operating specifications contained in Microchip’s Data Sheets. Most likely, the person doing so is engaged in theft of intellectual property. • Microchip is willing to work with the customer who is concerned about the integrity of their code. • Neither Microchip nor any other semiconductor manufacturer can guarantee the security of their code. Code protection does not mean that we are guaranteeing the product as “unbreakable.” Code protection is constantly evolving. We at Microchip are committed to continuously improving the code protection features of our products. Attempts to break Microchip’s code protection feature may be a violation of the Digital Millennium Copyright Act. If such acts allow unauthorized access to your software or other copyrighted work, you may have a right to sue for relief under that Act. Information contained in this publication regarding device Trademarks applications and the like is provided only for your convenience The Microchip name and logo, the Microchip logo, Accuron, and may be superseded by updates. It is your responsibility to dsPIC, KEELOQ, KEELOQ logo, MPLAB, PIC, PICmicro, ensure that your application meets with your specifications.
    [Show full text]
  • Microchip Miwi P2P Wireless Protocol
    AN1204 Microchip MiWi™ P2P Wireless Protocol This application note assumes that readers know C Author: Yifeng Yang programming. However, it also recommends that Microchip Technology Inc. readers review the IEEE 802.15.4 specification and Microchip MiMAC/MiApp interfaces before starting this application note or working with the MiWi P2P wireless INTRODUCTION protocol. The demand is growing for more and more applications to move to wireless communication. Protocol Overview The benefits are reduced costs and ease The MiWi P2P protocol modifies the IEEE 802.15.4 implementation. Wireless communication does not specification’s Media Access Control (MAC) layer by require cabling and other hardware, and the associated adding commands that simplify the handshaking installation costs. It also can be implemented in locations process. It simplifies link disconnection and channel where installing cable is difficult. hopping by providing supplementary MAC commands. Since the IEEE released the Wireless Personal Area However, application-specific decisions, such as when Network (WPAN) specification (IEEE 802.15.4™) in to perform an energy detect scan or when to jump 2003, it has become the real industry standard for low- channels, are not defined in the protocol. These issues rate WPANs (LR-WPAN). The specification applies to are left to the application developer. low data rate applications with low-power and low-cost requirements. Protocol Features Microchip MiWi™ P2P Wireless Protocol is one of the wireless protocols that are supported in MiWi The MiWi P2P Wireless Protocol has the following Development Environment (DE). It is a variation of features: IEEE 802.15.4, using Microchip’s IEEE 802.15.4 • Operates on Microchip PIC18, PIC24, dsPIC33 compliant and other proprietary RF transceivers, which and PIC32 platforms are controlled by Microchip 8, 16 or 32-bit • Supports Microchip C18, C30 and C32 compilers microcontroller with a Serial Peripheral Interface (SPI).
    [Show full text]