atmega16 or 32 mini user manual

7/29/2019 ATmega16 or 32 Mini User Manual

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Indias Premier Leader in Robotics

http://www.robosapiensindia.com

mailto:[email protected]

Robosapiens ATMEGA-16

Mini Board for

Robotics & Embedded

Application


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USER MANUAL


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Thanks for purchasing Robosapienss

ATMEGA-16 Mini Board for Robotics &

Embedded Application.

This Development Board is speciallydesigned to perform the Robotics

application and embedded

programming using ATMEGA-16 AVR

Microcontrollers.


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1. Introduction

1.1 Overview

The Mini Board is a complete starter kit and development system for the AVR Atmega16 flashmicrocontrollers from ATMEL

Corporation. It is designed to give designers a quick start to develop

code on the AVR.

This document covers features of this product with detail explanation of each sections and its use.

1.2 Features

Programming through Bootloading through USB or 6-Pin ISP (In System Programming)cable

Driver Software not required ( Plug & Play device) USB Port for Bootloading Exposed Four ports available for user interface

PORTA-8 Data Lines, PORTB-8 Data Lines, PORTC-8 Data Lines, PORTD-8 Data Lines

Port for USART/UART communication Buzzer for sound output Light Dependent Resistor (LDR) interfaced on ADC port External Reset Switch 16x2 LCD interfacing port with on board contrast controlling preset. Two supply inputs: one through battery and second through adapter. On board 5 volt regulated power supply for the board and external peripherals. Two H-Bridge implemented in the board using L293D IC to drive two DC motor with 1A

drive current at voltages 4.5 to 36 volt.

Comes with Built in Black Line Follower Robot Program

1.3 Known Issues

There are at the moment no known issues with the Mini Board.1.4 Precautions

USB Bootloader must be used always. If kit is once programmed using ISP, USBBootloading firmfare will get erased and cannot be used for programming.

Pin A0 is reserved for Bootloading application, it should not be used.NOTE: Novice users must not use ISP Programmer on this kit.


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2. Getting Started

2.1 Quick Start

The Mini Board can source power to the microcontroller through the USB cable. Remember

that the power available through the USB cable is limited. If your application attaches several

peripherals to the board, you should use an external power source connected to the DC input

socket on Mini Board. The external power supply should be 9-12V DC with positive centre

connector.

The red POWER LED is lit when power is on.

2.2 Connecting the Hardware

The Mini Board must be connected to a host PC with a USB cable for programming. Connect

the cable to a USB port on the PC or on a USB hub. The USB port must be capable of

supplying 500mA. If using a USB hub, make sure it has an external power supply.

Connect the other end of the USB cable to the USB connector on Mini Board.

3. Mini Board Block Diagram

DC JACK POWER

MCU

USB

RESET BUTTON

OSCILLATOR

LDR

BUZZER

PWM LED

UART POR

LCD PORT

ISP PORT A, B, C & D


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4. Block Description

LCD PORT

RESET

MCU LDRPOWER LED

USB PORT

BUZZER

ISP PWM LED DC JACK


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4.1 Microcontroller

The Mini Board is designed for AVR Atmega16.

4.2 Power Supply

The supply voltage to the AVR microcontroller is provided either through DC Jack or USB.

It is connected to the AVR's VCC pin.

4.2.1 DC J ack

Connect external power supply to this jack.

4.2.2 USB

Connect USB connector to this Port.

4.2.3 Power LED

LED will glow when Power in On.


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4.3 USB Port

For programming the Mini Board connect the USB port on Mini Board to

a free USB port on the PC or on a USB hub through cable.

4.4 Reset Button

Press this button to reset the Mini Board.

Reset Button is connected on Pin no. 9 (RESET)

4.5 LDR

LDR (Light Dependent Resistor) is connected to

microcontroller for applications that are dependent on

intensity of external light source.

LDR is connected on Pin no. PA1

4.6 ISP

In-System Programming uses the AVR internal SPI (Serial Peripheral Interface) to download

code into the flash and EEPROM memory of the AVR. ISP programming requires only VCC,

GND, RESET and 3 signal lines for programming.

The AVR can be programmed at the normal operating voltage,

normally 2.7V-6.0V. No high voltage signals are required. The ISP

programmer can program both the internal flash and EEPROM. It alsoprograms fuse bits for selecting clock options, startup time and internal

Brown Out Detector (BOD) for the device.

During ISP programming the 6-wire cable must always be connected to

the header marked ISP (6PIN).

ISP port also acts power source.

ISP is connected on Pin nos.

MOSI MISO SCK RESET VCC GND

PB5 PB6 PB7 RESET (9) VCC GND


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4.7 Buzzer

Buzzer is connected to microcontroller for applications that need

sound as output.

Buzzer is connected on Pin no PB3

4.8 PWM LED

PWM LED is connected to microcontroller for applications that

require PWM application. LED is used to check proper functioning

of PWM application.PWM LED is connected on Pin no PD5

4.9 LCD Port

LCD Port is connected to microcontroller for

applications that need information display.

These pins are connected on Pin no[.......]

GND VCC VSS RS RW EN D0 D1 D2 D3 D4 D5 D6 D7 VCC GNDGND VCC VSS PB0 PB1 PB2 X X X X PB4 PB5 PB6 PB7 VCC GND

4.12 PORT A, B, C & DThese Ports are connected to microcontroller for interfacing I/O Pins of Microcontroller.

4.12.1 PORT A4.12.2 PORT B

1)Pin B0 (PB0) - Pin B3 (PB3)2)Pin B0 (PB3) - Pin B3 (PB7)

4.12.3 PORT C4.12.4 PORT D


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5. Example Application

5.1 Connecting LCD

Interfacing LCD to Mini Board is easy and intuitive , just connect LCD Pins to the Board

pins as shown in figure.

5.2 Connecting Sensors

When interfacing sensors, always make sure to connect sensor output pin to MCU pin, VCCto VCC Pin and GND to GND pin of the board.


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5.3 Connecting Motors

When interfacing motors , you have connect both the pins to the cable to the MCU pins as

shown in the figure.


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5.4 Ground & VCC Pins GND

VCC

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