AVR ATmega8 Development Board

Transcription

1 AVR ATmega8 Development Board Campus Component Pvt. Ltd.

2 DISCLAIMER Information furnished is believed to be accurate and reliable at the time of publication. However, Campus Component Pvt. Ltd. assumes no responsibility arising from the use of the specifications described. The applications mentioned herein are used solely for the purpose of illustration and Campus component Pvt. Ltd. makes no warranty or representation that such applications will be suitable without further modification, nor recommends the use of its products for application that may present a risk to human life due to malfunction or otherwise. Campus Component Pvt. Ltd. does not assume any liability arising out of the application or use of any product or circuit described herein; neither does it convey any license under its patents rights, nor the rights of other. Campus Component Pvt. Ltd. reserves the right to alter its products without prior notification. For the most up-to-date information, please visit our web site at Pictures are representational only and actual product may vary. Copyright 2011CAMPUS COMPONENT Pvt. Ltd. All rights reserved. Campus Component Pvt. Ltd., logo and combinations thereof, are registered trademarks of CAMPUS COMPONENT Pvt. Ltd. Other terms and product names may be trademarks of others.

3 AVR Development Board Introduction: AVR ATmega8 Development Board is made from Double sided PTH PCB to provide extra strength to the connector joints for increased reliability. Board can work on 7V to 15V AC or DC supply. It has built-in reverse polarity protection voltage regulator has heat sink for heat dissipation so that it can supply 1Amp current continuously without getting over heated. It has switches for reset and power. All the ports are connected to standard 10 pin Box Header connectors. Features: Double sided PTH PCB board to provide extra strength to the connector joints for increased reliability Support the following 40 pin AVR Microcontroller from Atmel Corporation ATmega8 ATmega8L ATmega48 ATmega88 ATmega168 ATmega328 Supports LCD with linear 16x1 pinout 16x1 LCD, 16x2 LCD and 16x4 LCD 20x1 LCD, 20x2 LCD and 20x4 LCD 32x2 LCD and 32x4 LCD 40x2 LCD All the ports are connected to standard 10 pin Header Box connectors Onboard crystal oscillator generating 12MHz frequency Adapter Input AC/DC Socket For 7V to 15V AC/DC Reverse polarity protected by using onboard Bridge Rectifier Voltage regulation provided using 7805 Voltage Regulator Provides 8 yellow SMD LEDs for I/O testing Provides facility for resetting the board when required LCD contrast adjusting through potentiometer provided Onboard 5V Buzzer provided for testing Power on display indicator(red or Yellow LED) Warning: Current dissipation throughout board s all components and connectors should not exceed than 1 Amp

4 Hardware Description: LED Port D Port Reset Switch Buzzer VCC GND VIN Power On LED LED for I/O Testing ISP Port Microcntroller IC Sliding Switch Bridge Rectifier AC/DC Socket Voltage Regulator LCD Connector Potentiometer for Contrast adjust for LCD B Port C Port LCD Port LCD Command Pins Power Supply Socket: This power supply socket which actually named as AC/DC Socket provides the functionality to user to connect external power supply from Transformer, Battery or Adapter via DC jack. User can provide maximum of 15V AC/DC power supply through AC/DC socket. This is power supply designed into maximum protection consideration so that it can even prevent reverse polarity DC power supply as well as AC power Supply. It also includes 7805 Voltage Regulator which provides regulated 5V DC for Microcontroller and other I/O connectors. GND, VCC and VIN Connector: This board also provides user to have an extra pins for Power supplies as shown in figure. These pins are GND (0V), VCC (5V from Voltage Regulator) and VIN (Voltage supplied to AC/DC Socket minus 1.4V denoted as +12V on board). Four pins are provided for each type of supply. User can connect these pins to external device by using Single Berg Wire. On/Off Switch and Reset Switch: On/Off switch is type of SPDT Sliding switch which is used for only make power supply on/off provided through AC/DC Socket. Reset Switch is type of Push on DPST tactile switch which is used for only to make program reset. 10 pin Box Header Connector: Pin Headers with plastic guide box around them are known as Box Headers or Shrouded Headers and are normally only used in combination with a Flat Ribbon Cable (FRC) connector. A notch (key) in the guide box normally prevents placing the connector the wrong way around. Box Header can be connected using FRCs and also Single Berg Wires for individual pin connections. Notch

5 Ÿ FRC Cable: Two FRC Connectors can be connected with the help of FRC cable. FRC cable has following pin configuration. A, B, C, D Port Connector: 40 pin ATmega series microcontroller has four I/O ports generally. These Four Port are expanded from Microcontroller IC separately by using 10 pin Box Header for each port (A, B, C and D port). Among 10 pins 8 pins represents I/O pin of respective port th th and 9 and 10 pin represents GND and VCC respectively. This is shown in figure. LED Connector Eight LEDs used for I/O testing are connected in common cathode configuration. Other terminal (anode) of LED connected to the LED port. This LED port can be directly connected to any of A, B, C or D port's Box Header through Flat Ribbon Cable (FRC). LCD Connector This board featured with two types of LCD Connections. One is linearly placed 16 pin Berg male Connector. This connector used to mount LCD which has 16 connecting pins. Another connector is 10 pin Box Header through which user can connect LCD port to any of I/O port (A, B, C or D). There are also three other pins of Berg male connector which represents RS, RW and EN pin of LCD so that user can connect these pins to any of I/O pin by using Single Berg Wire. D7 D3 D6 D2 EN LED+ D5 D1 RW LED- D4 D0 RS VEE VCC GND RS RW EN Potentiometer for contrast adjust of LCD LCD Port

6 ISP Connector ISP (In System Programming) port provides connection between AVR Development Board and AVR Programmer Kit. It has following configuration. It also used as a power supply from USB (Universal Serial Bus) Cable. As this functionality provided by Microcontroller IC itself, thus pins are directly connected to respective pins. C Port Pin Configuration: C Port in 28 pin ATmega series Microcontroller has only seven I/O pins as stated in Datasheet. PC6 which is seventh pin of C port is actually works as a RESET Pin. If user do any I/O operation on this pin Microcontroller will get reset every time. Thus this pin is not available in this board to prevent unfeasibility in operation or application. PC6 pin removed to prevent interrupting reset operation

7 Installation of Software: This guide will help User to installation of Software which are recommended for Program Compiling and Downloading. Step 1: Double Click on WinAVR software, then User will see window like this. Select language and then press OK. Step 2: after clicking OK welcome window will appear, Click on Next > Step 3: Read License agreement and press I Agree

8 Step 4: Choose destination folder for installation. Press Next > Step 5: Select all checkboxes and then press Install button Step 6: Now Installing window will appear, Let the progress bar be filled completely

9 Step 7: After Installation complete window press Finish Installation of WinAVR is completed Now Install AVR Studio4 Step 1: Double Click on AVRStudio4 installation file, then welcome window will appear, click on Next >

10 Step 2: Click on I accept the terms of the agreement and then click on Next > Step 3: If User want to change destination folder for installation then click on Change otherwise or after click on Next >

11 Step 4: Check Install/upgrade Jungo USB Driver and then click on Next > Step 5: Click on Install Button

12 Step 6: Let the installation be completed Step 7: After completion of installation click on Finish Button

13 Building Programs in AVR Studio 4 Following are steps show how programming should develop step by step in AVR Development Board. These steps will demonstrate to User a program which glows eight LEDs serially. Its recommend User to use compiler 'WinAVR' and Editor 'AVRStudio4'. Step 1: Go to Start Menu > Select All Programs Click on Atmel AVR Tools Folder > Left Click on AVR Studio 4

14 Step 2: Loading Window will appear on Desktop Select New Project Note: However if User wants to open existing project then user needs to click o Open Project Step 3: In Project type section select AVR GCC Option Note: GCC used to Compiling Program written in Embedded C Language, whereas AVR Assembler used to Compiling Program written in Assembly Language.

15 Step 4: Give a Project name whatever User wants Warning: Don't give space in your Project Name; it will consider it as invalid name Check Crete initial file and Create folder Check boxes Press Next Button Step 5: Two lists will be appeared, select AVR Simulator option from left side list Step 6: Select Microcontroller for which User wants to write a program, here ATmega8 shown as an example. Press Finish Button

16 IDE will generate some windows which created platform to write a program for selected Microcontroller i.e. ATmega16. User needs to write program in Middle window. Step 7: Write Down program to glow eight LEDs serially in Embedded C Language Note: This is sample program User can write any type of program according to application Step 8: Once User completed Program go to main menu and then select Build option > Click on Build to compile the program

17 Step 9: If program doesn't contains any error it will give message as shown in picture and will generate.hex file, else it won't generate.hex file Note: Just deal with errors don't consider warnings, if User gets any number of warnings still program can generate.hex file Step 10: Now attach Microcontroller Development Board and AVR USB Programmer through ISP Port only. Warning: Programmer should be connected to ISP port only, if you connect programmer via FRC to any other port it may damage your programmer as well as your development board. Step 11: Now open Sinaprog Software, window will look like this

18 Step 12: Select.hex file of your respective program Path to find.hex file Go to Directory where you put your Project Folder > Open Folder named as your project name > open default folder > select.hex file Step 13: Click on Program button present in Flash section After Program will finish it will give you message Programming Flash OK

19 Step 14: Take one FRC and connect its one end to LED port Connect another end to A port Note: Acoording to sample program we have connected LED port to A port, User can use any of Microcontroller s I/O port acccording to modified program Congrats! You successfully executed your Program Contact Us Campus Component Pvt. Ltd. Ackruti Chambers, Office No. 308, 3rd Floor, Near Laxminarayan Theater, Swargate, Pune Mobile : Landline : Address: sales@campuscomponent.com