Can protocol implementation for industrial process control gsm
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This document describes a project to implement industrial parameter control through the CAN protocol using 8051 and AVR microcontrollers. The main aim is to allow control of sensors and actuators over a CAN network using microcontrollers as the interface between devices and the bus. The programming is done using Embedded C and RIDE software. Hardware includes AT89S52 and ATmega8515 microcontrollers, MAX485 CAN controllers, an LCD display, temperature and light sensors, and a power supply.
Can protocol implementation for industrial process control gsm
- 1. Embedded systems Ph:7842522786 9948887244 CAN protocol Implementation for Industrial Process control ABSTRACT AIM: The main aim of this project is to implementation of industrial parameter control through CAN protocol by using 8051 and AVR microcontrollers. DESCRIPTION: CAN is a multi-master broadcast serial bus standard for connecting electronic control units (ECUs).Each node is able to send and receive messages, but not simultaneously: a message (consisting primarily of an ID usually chosen to identify the message-type/sender and up to eight message bytes) is transmitted serially onto the bus, one bit after another this signal pattern codes the message (in NRZ) and is sensed by all nodes. The devices that are connected by a CAN network are typically sensors, actuators and control devices. A CAN message never reaches these devices directly, but instead a host processor and a CAN controller are needed between these devices and the bus. Bit rates up to 1 Mbit/s are possible at network lengths below 40 m. Decreasing the bit rate allows longer network distances (e.g. 125 kbit/s at 500 m). The programming language used for developing the software to the microcontroller is Embedded/Assembly. The KEIL cross compiler is used to edit, compile and debug this program. Micro Flash programmer is used for burning the developed code on Keil in to the microcontroller Chip. Here in our application we are using AT89C51 microcontroller which is Flash Programmable IC.AT represents the Atmel Corporation represents CMOS technology is used for designing the IC. This IC is one of the versions of 8051. skesystems@gmail.com Vijayawada Hyderabad Page 1
- 2. Embedded systems Ph:7842522786 9948887244 BLOCK DIAGRAM OF THE PROJECT CANH CANL AVR Micro Display Controller Unit CAN Transceiver CAN Controller CAN Transceiver CAN Controller 8051 Micro CAN Transceiver CAN Controller 8051 Micro LDR Controller Ds18b20 Controller SOFTWARE: 1. Embedded C 2. RIDE 3. ISP to program the microconrollers HARDWARE: 1. At89s52 2. At mega8515 3. max485 CAN Controller 4. Power supply 5. LCD 6. Ds18b20 7. LDR skesystems@gmail.com Vijayawada Hyderabad Page 2
- 3. Embedded systems Ph:7842522786 9948887244 skesystems@gmail.com Vijayawada Hyderabad Page 3