Atmel AVR Butterfly User manual

AVR Butterfly Evaluation Kit
.............................................................................................
User Guide

AVR Butterfly User Guide i
4271B–AVR–11/03
Table of Contents
Section 1
Introduction...........................................................................................1-1
1.1 Resources Available on the AVR Butterfly Kit...........................................1-2
Section 2
How to Operate the Preprogrammed Application.................................2-3
2.1 Included Firmware.....................................................................................2-3
2.2 Joystick Input ............................................................................................2-4
2.3 Menu System............................................................................................2-5
2.4 Bootloader.................................................................................................2-7
Section 3
Using the AVR Butterfly......................................................................3-11
3.1 Connectors..............................................................................................3-11
3.2 Programming the AVR Butterfly..............................................................3-11
3.3 JTAG.......................................................................................................3-15
3.4 LCD Display............................................................................................3-16
3.5 Joystick ...................................................................................................3-16
3.6 Sensors...................................................................................................3-17
3.7 Connect to PC.........................................................................................3-20
3.8 USI..........................................................................................................3-20
3.9 External DataFlash..................................................................................3-21
3.10 Piezo Element.........................................................................................3-22
3.11 Battery.....................................................................................................3-22
Section 4
Troubleshooting Guide .......................................................................4-25
Section 5
Technical Specifications .....................................................................5-27
Section 6
Technical Support...............................................................................6-29
Section 7
Complete Schematics.........................................................................7-31
7.1 Bill of Materials........................................................................................7-37

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Section 1
Introduction
The AVR Butterfly evaluation kit is designed to demonstrate the benefits and key fea-
tures of the AVR microcontrollers. It is a stand alone microprocessor module that can be
used in numerous applications:
 The AVR architecture in general and the ATmega169 in particular
 Low power design
 The MLF package type
 Peripherals
– LCD controller
– Memories
- Flash, EEPROM, SRAM, external DataFlash
– Communication interfaces
- UART, SPI, USI
– Programming methods
- Selfprogramming/ Bootloader, SPI, Parallel, JTAG
– Analog to Digital Converter (ADC)
– Timers/Counters
- Real Time Clock (RTC)
- Pulse Width Modulation (PWM)
It also serve as a development kit for the ATmega169, and can be used as a module in
other products.
Figure 1-1. AVR Butterfly

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1.1 Resources
Available on the
AVR Butterfly Kit
The following resources are available on the Butterfly kit.
 ATmega169 (MLF-package)
 LCD-on-glass display with 120 segments, for demonstrating the ATmega169 LCD
controller.
 Joystick, 4-directions with centre push, as user input
 Piezo element, to play sounds
 32kHz Xtal for the RTC
 4 Mbit DataFlash, for data storage
 RS-232 level-converter, for communicating with off-board units
 Negative Temperature Coefficient (NTC) thermistor, to measure temperature
 Light Dependent Resistor (LDR), to measure light intenisty
 3V button cell battery (600mAh) to provide operating power
 JTAG emulation, for debugging
 USI-interface, for additional communication interface
 Supported by AVR Studio 4.
 Pre-programmed with a demonstration application, including bootloader
 No external hardware is required to reprogram the AVR Butterfly
The ATmega169 in the kit controls the external peripherals, and can also be used to do
voltage readings from 0 to 5 volts. The kit can be reprogrammed a number of different
ways including serial programming through the JTAG port. Most users will prefer to use
the preloaded bootloader with AVR Studio to download new code.
For more information about the ATmega169, see the datasheet at www.atmel.com.

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Section 2
How to Operate the Pre-programmed
Application
The AVR Butterfly comes with a preprogrammed application. This section will go
through the basics of this application. The firmware can be downloaded from the AVR
Butterfly web-site, http://www.atmel.com/products/AVR/butterfly.
2.1 Included
Firmware These modules are preprogrammed with the AVR Butterfly:
 Bootloader code
 Application code
– State machine
– Features included
- Name-tag
- Clock (date)
- Temperature measurements
- Light measurements
- Voltage readings
- Play tunes/melodies
- Auto power save
- Adjust LCD contrast
– More functions can be added later on
- Calculator
- Reminder function
- Alarm (daily alarms, kitchen timers, etc…)
- Play melodies and displaying the text (Karaoke-function)
- With the 4Mbit dataflash one can store large amount of data. (Some
examples: AVR Info Bank (Basic of all AVR-parts); your local bus-table;
melodies, etc.)
Note: The application can be upgraded without any external hardware, due to the inte-
grated level-converter and the Self-programming feature.

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2.2 Joystick Input To operate the AVR Butterfly a joystick is used as user input. It operates in five direc-
tions, including center-push, see Figure 2-1.
Figure 2-1. Joystick Input
Using the joystick one can move around in the menu shown in Figure 2-2, and edit val-
ues, entering name, etc. Here are examples on how to enter your name.
2.2.1 Entering Your Name
Using the Joystick: 1. Press the joystick up (“SCROLL UP”) to wake the AVR Butterfly. If “AVR BUT- TERFLY” is notscrolling over the display, press the joystick to the left (“EXIT
SUB-MENU”) until it does.
2. Press the joystick down (“SCROLL DOWN”) three times, so the string “NAME” is
displayed.
3. Press the joystick to the right (“ENTER SUB-MENU”). If this is the first time a
name is entered, the string “ENTER NAME” will be displayed, otherwise the
name already entered will be displayed and you have to press the joystick to the
right (“ENTER SUB-MENU”) once more.
4. When “ENTER NAME” is displayed press center push (“ENTER”). If this is the
first time you enter a name, the character “A” should be blinking in the right side
in the display, otherwise the last character of the already entered name will blink.
5. Press the joystick up (“SCROLL UP”) or down (“SCROLL DOWN”) to get to the
wanted character. Press the joystick to the right (“ENTER SUB-MENU”) to add a
new character or press the joystick to the left (“EXIT SUB-MENU”) to remove a
character.
6. When you have got all the characters, up to maximum 25, press center push
(“ENTER”) to save this name. The name will now be displayed in the display. If
the name is more than 6 characters long it will scroll over the display, otherwise it
will be displayed static.

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2.2.2 Entering Your Name
Using a Terminal: 1. Connect a serial cable from the PC to the AVR Butterfly as described in Section 3.7 “Connect to PC”, Open a terminal on your PC (e.g. HyperTerminal) and con-
figure the terminal to 19200 Baudrate, 8 Databits, none Parity and one stop bit.
2. Go through point 1, 2 and 3 above.
3. When the “ENTER NAME” is displayed press the joystick down (“SCROLL
DOWN”), and “DOWNLOAD NAME” will be displayed
4. Press center push (“ENTER”) to activate the UART, and the text “WAITING
FOR INPUT ON RS232” will be displayed.
5. Type your name in the terminal window on the PC (up to 25 characters) and
save the name by pressing enter on your PC-keyboard. The name you typed
should now be displayed in the AVR Butterfly display.
Note: The Auto Power Off feature is default enabled. It will turn off the LCD after
default 30 minutes. This timeout can be changed or turned off. To wake the
AVR Butterfly from SLEEP, press the joystick in the UP-position.
2.3 Menu System A menu system is established to be able to shift between the different modules in appli-
cation in a efficient way.

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Figure 2-2. Application Menu