AVR Development Board (118010)
Contents
1. Slave in PortB3 MISO Master in Slave out PortB4 SCK Serial clock PortB5 RST Reset Reset GND Ground Ground 2 11 RS 232 INTERFACE These is a 3 pin interface that can be used for PC controlled applications debugging purpose data communication with PC and for inter board data communication The port consists of three pins namely R Receiver T Transmitter G Ground 2 12 PB PORTB It is a general purpose I O port This port contains six pins that can be used as digital input and digital output These pins are in the form DATA VCC GROUND denoted as D respectively on the board The Data pins are towards the microcontroller The VCC and Ground pins are provided with a 5V 1A power supply and or the supply to these pins can also be switched to external supply connected in DS pin through PTOG switch 2 13 PC PORTC It is a general purpose I O port This port contains six pins that can be used as digital input output and ADC These pins are in the form DATA VCC GROUND denoted as D respectively on the board The VCC and Ground pins are provided with a 5V 1A power supply 2 14 PC PORTC It is a general purpose I O port This port contains eight pins that can be used as digital input and output Technophilia 8 User s Manual 2 15 MOTOR DRIVER CONNECTIONS The motor drivers are used to run the DC motors or stepper motors that may be connected to the board according to the data from the microcont2. in 5V mode or to use any other external power source connected in DS for the high power applications like servo motors by setting the switch in EXT mode Technophilia 6 User s Manual PROG Programming Switch It is also a toggle switch for programming the microcontroller using on board USB programmer For programming mode it should be ON then RESET button should be pressed For normal operation it should be off 2 7 POWER SUPPLY LS Logic Supply It consist of two pins one is ve and another is ve A battery or a AC adaptor can be connected here to provide power suply to the mother board it provides regulated power supply to all the peripherials present in the mother board and also to the external periphrials connected to the motherboard through a voltage regulator The DC voltage provided to this terminal should be lies in between 6 to 16 volt To use the supply connected in LS pin the power switch should be toggled towards MP Main power DS Driving Supply It consist of two pins one is ve and another is ve lt is basically use to provide a separate high current power supply to the Motors For operating DC motors you may provide here a Power supply of 5 to 40 volt For operating a servo motor you may suppose to provise any suitable power supply as per the requirement of your motors mostly servos works at 4 5 to 6 volt Power from this pins are directly goes to the driving supply of the motor driver and t
3. microcontroller of mega AVR family ATmega8 3 2 Programming WinAVR is a suite of executable open source software development tools for the Atmel s AVR series of RISC microcontrollers hosted on the Windows platform It includes the GNU GCC compiler for C and C Steps for writing a code using WinAVR 1 Open the Programmer s Notepad and write your code Create a new folder and save your code in that folder with extension name c Now open the make file and edit it as mentioned bellow Make file gt main filename give your file name here without extension Make file gt MCU type gt ATmega chose your UC Make file gt Debug format AVR ext COFF Make file gt Programmer gt select your programmer if your programmer is not in the list then follow the step3 d Make file gt port gt select the port where you have connected your programmer Make file gt enable editing make file gt then in your make file edit the following things 10 F_CPU 12000000 change it as for your crystal frequency AVRDUDE_PROGRAMMER stk500 here write down you programmers name 11 Save the make file in your folder without changing its name 12 Now open the programmer s notepad 13 To compile your code and to generate hex file Tools gt make all 14 To upload your code into your UC Tools gt program or S alt a po Technophilia 10 User s Manual Website www technophilia co in Email info technophilia co in Last mo
4. stepper motors by using separate power supply X Technophilie 5 User s Manual 2 5 16 X 2 16 X 1 LCD INTERFACE The LCD interface can be use to interface any 16x2 or 16x1 character LCD display in 4 bit mode The LCD display can be used to display any message status or also can be used for debugging purpose The LCD interfacing can also be used as a general purpose input output port The pin connections for interfacing an LCD to the board are given below D4 PortBO D5 PortB1 D6 PortB2 D7 PortB3 RS PortB4 RW Ground E PortB5 XTAL1 PortB6 XTAL2 PortB7 2 6 SWITCHES Four tact switches along with a Reset switch are present on the board in order to provide an external input to the board The switches are connected in the following manner SO PortCO S1 PortC1 S2 PortC2 S3 PortC3 RST Reset switch The Reset switch is basically used to reset a running program right to the beginning it is same as the reset switch of a PC POWER Power On Switch It is basically a toggle switch used to provide power supply to the main board The power can be supplied either by a battery power supply through LS or can be USB powered Thus the POWER switch can be made to toggle between MP Main Power or UP USB Power PTOG Power Toggle Switch It is basically a toggle switch which toggles the power for the devices connected to PORTB either to use the internal power supply 5V of the main board by setting the switch
5. AVR Development Board 118010 User s Manual Technophilia Research Invention Execution User s Manual About the User Guide AVR Development Board 118010 is especially designed for the students having interest in electronics embedded system robotics and industrial automation This board is made in such a way that it becomes easier for any body to learn about AVR micro controllers This board can also be used in various applications and hobby projects PROPRIETARY NOTICE This document contains proprietary information furnished for evaluation purposes only except with the express written permission of Technophilia such information may not be published disclosed or used for any other purpose You acknowledge and agree that this document and all portions thereof including but not limited to any copyright trade secret and other intellectual property rights relating thereto are and at all times shall remain the sole property Technophilia and that title and full ownership rights in the information contained herein and all portions thereof are reserved to and at all times shall remain with Technophilia You acknowledge and agree that the information contained herein constitutes a valuable trade secret of Technophilia You agree to use utmost care in protecting the proprietary and confidential nature of the information contained herein Technophilia 2 User s Manual Contents l PFOGUCE Description scssancaicsc
6. dified Sept2011 Technophilia 11
7. ed 7 channel I O pins for ADC Exposed 12 I O channels for sensors and other peripherals with 5V 1A power supply Exposed 8 channel I O pins for servo sensors and other peripherals with dual power supply Four tact switches for external input and reset Four test surface mounted LEDS for status and debugging purpose Two supply indicator LEDS Dual power supply through DC source 6V to 16V or USB powered On board USB programmer Dual or single power supply option Exposed ISP pins for programming Option for connect or disconnect LEDs Option for separate AREF Analog Reference for ADC Option for separate AVCC Analog VCC for ADC Technophilia 4 User s Manual 2 Parts Identification D eteert nrg 2 SEG BORA Y ad _ d 2 1 Microcontroller It is a micro computer chip which stores our programs executes them and takes necessary action The chip used here is Atmel popular AVR micro controller 2 2 1117 VOLTAGE REGULATOR It is a three terminal 5V voltage regulator IC used to provide a constant voltage supply of 5V to the micro controller and other peripherals i e sensors etc attached in the main board 2 3 MAX232 This IC takes care of voltage conversion needed for the communication between the PC s RS 232 Serial COM port and AVR Development board 2 4 L293DNE MOTOR DRIVER This is basically a motor driver IC which takes input from microcontroller and is able to drive the DC and
8. o the supply pins of PortB if PTOG switch is toggled towards EXT J1 Jumper 1 It is a simple jumper which can be use to use a sinle power supply for DS and LS If you put here a jumper then you have to provide supply only on DC or LS and your board will get both the power supply USB socket 2 8 LED s It is basically used for USB communication with the PC It also provides necessary logic supply to the motherboard In order to use the USB supply the POWER switch should be toggled towards UP USB power When using the USB power some prequtions should be taken such as any heavy load should not be connected to the board directly and Don t use the J1 Active high RED LED1 PORTBO RED LED2 PORTB1 RED LED3 PORTB2 RED LED4 PORTB3 ORANGE LS l Logic Power ON indicator GREEN DS I Driver Power ON indicator Technophilia 7 User s Manual 2 9 BZ BUZZER It can be easily used to get an audible feedback from the controller It is connected in an active high mode i e the buzzer beeps when the data given to it is 1 The Buzzer is connected to the pin PORTC5 of the microcontroller 2 10 ISP IN SYSTEM PROGRAMMING INTERFACE It is the In System Programming interface of the main board which can be used to connect any ISP programmer to download the programs in the microcontroller It can also be used in SPI Serial Peripheral Interface communication The pins provided for ISP are given below MOSI Master Out
9. roller The motor driver s link with micro controller is shown bellow MO PortBO M1 PortB1 M2 PortB2 M3 PortB3 M4 PortD4 M5 PortD5 M6 PortD6 M7 PortD7 Technophilia 9 User s Manual 3 The AVR Microcontrollers 3 1 Description The AVR is a Modified Harvard architecture 8 bit RISC single chip microcontroller which was developed by Atmel in 1996 The AVR was one of the first microcontroller families to use on chip flash memory for program storage as opposed to One Time Programmable ROM EPROM or EEPROM used by other microcontrollers at the time Atmel s low power high performance AVR microcontrollers handle demanding 8 and 16 bit applications With a single cycle instruction RISC CPU innovative Pico Power technology and a rich feature set the AVR architecture ensures fast code execution combined with the lowest possible power consumption Whether you program in C or assembly the tuned AVR instructions decrease program size and development time The well defined I O structure limits the need for external components and reduces development cost A variety of internal oscillators timers UARTs SPIs Pulse Width Modulation pull up resistors ADCs Analog Comparators and Watch Dog Timers are some of the features available for creative engineers The AVR microcontrollers are divided into 4 families tiny AVR mega AVR XMEGA and Application specific AVR Among these 4 families of AVR here we are going to use a
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