Microchip Technology ATmega4809 Xplained Pro User manual

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Getting Started with megaAVR® 0-Series
Features
• Getting Started with megaAVR® 0-series Microcontrollers and Tools
• Getting Started with ATmega4809 Xplained Pro and Atmel® Studio 7.0
Introduction
Author: Irun Walberg, Microchip Technology Inc.
This application note outlines how to get started with the megaAVR® 0-series devices.
Refer to the data sheet for further information on the differences between the megaAVR® 0-series
devices.
© 2018 Microchip Technology Inc. Application Note DS00002653A-page 1

Table of Contents
Features.......................................................................................................................... 1
Introduction......................................................................................................................1
1. Relevant Devices.......................................................................................................3
1.1. megaAVR® 0-Series..................................................................................................................... 3
2. Get the Device Datasheet......................................................................................... 4
3. Get the Tools............................................................................................................. 5
3.1. Get the ATmega4809 Xplained Pro Evaluation Kit.......................................................................5
3.2. Get the STK600 Starter Kit...........................................................................................................7
3.3. Get Source Code from Atmel | START.........................................................................................8
3.4. Get Atmel Studio 7.0.................................................................................................................... 9
3.5. Get IAR Embedded Workbench for AVR......................................................................................9
3.6. Get Device Support...................................................................................................................... 9
4. Atmel Studio Users Getting Started.........................................................................10
4.1. Atmel Studio with ATmega4809 Xplained Pro............................................................................10
4.2. Atmel Studio with STK600..........................................................................................................15
5. What's Next............................................................................................................. 21
6. Revision History.......................................................................................................22
The Microchip Web Site................................................................................................ 23
Customer Change Notification Service..........................................................................23
Customer Support......................................................................................................... 23
Microchip Devices Code Protection Feature................................................................. 23
Legal Notice...................................................................................................................24
Trademarks................................................................................................................... 24
Quality Management System Certified by DNV.............................................................25
Worldwide Sales and Service........................................................................................26
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1. Relevant Devices
This chapter lists the relevant devices for this document.
1.1 megaAVR® 0-Series
The figure below shows the megaAVR® 0-series devices, laying out pin count variants and memory sizes:
• Vertical migration is possible without code modification, as these devices are fully pin and feature
compatible.
• Horizontal migration to the left reduces the pin count and therefore the available features.
Figure 1-1. megaAVR® 0-Series Overview
48KB
32KB
16KB
8KB
4KB
28/32 48
Pins
Flash
ATmega3208
ATmega4808
ATmega3209
ATmega4809
Devices with different Flash memory size typically also have different SRAM and EEPROM.
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Relevant Devices
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2. Get the Device Datasheet
Web pages
•http://www.microchip.com/wwwproducts/en/ATmega3208
•http://www.microchip.com/wwwproducts/en/ATmega3209
•http://www.microchip.com/wwwproducts/en/ATmega4808
•http://www.microchip.com/wwwproducts/en/ATmega4809
Documents/files
• megaAVR 0-series Manual (.pdf)
• ATmega3208/4808 – 28-pin Datasheet (.pdf)
• ATmega3208/4808 – 32-pin Datasheet (.pdf)
• ATmega3209/4809 – 48-pin Datasheet (.pdf)
• megaAVR 0-series Errata (.pdf)
The documentation for the megaAVR® 0-series is split into three document types:
• Manual (includes all device independent descriptions of the device)
• Datasheet1 (includes all device dependent descriptions of the device, number of peripherals, pinout
and electrical characteristics)
• Errata (includes all known erratas for the device)
1For devices that are future products, the product brief is available instead of the datasheet.
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Get the Device Datasheet
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3. Get the Tools
Atmel Studio 7.0, which uses GCC compiler, is the preferred IDE to get started with megaAVR® 0-series.
3.1 Get the ATmega4809 Xplained Pro Evaluation Kit
Figure 3-1. ATmega4809 Xplained Pro Kit
DEBUG USB
POWER HEADER
EXTENSION 1 HEADER
EXTENSION 2 HEADER
EXTENSION 3 HEADER
ATmega4809
RESET BUTTON
CURRENT MEASUREMENT
HEADER
SW0 USER BUTTON
USER LED0
mikroBUS™ socket
AVR DEBUG
FOR EXTERNAL
DEBUGGER
ATECC508A
CRYPTO DEVICE
32.768kHz Crystal
TARGET VOLTAGE
SELECT HEADER
Web page: http://www.microchip.com/developmenttools/productdetails.aspx?partno=atmega4809-xpro
Get the kit: http://www.microchipdirect.com/ProductSearch.aspx?Keywords=atmega4809-xpro
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Get the Tools
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Document/file:
• ATmega4809 Xplained Pro (.pdf)
Key Features
• ATmega4809 Microcontroller
• Selectable Target Voltage
– 3.3V
– 5.0V (USB / external power)
• One Mechanical Reset/User Programmable Button
• One Mechanical User Programmable Button
• One Yellow User Programmable LED
• ATECC508 CryptoAuthentication™ device
• 32.768 kHz Crystal
• Three Xplained Pro Extension Headers
• One mikroBUS™ Socket
• 10-pin, 50-mil AVR Debug Connector with UPDI
• Embedded Debugger
– Auto-ID for board identification in Atmel Studio
– One yellow status LED
– One green board power LED
– Symbolic debug of complex data types including scope information
– Programming and debugging, including power measurements
– Data Gateway Interface: SPI, I2C, four GPIOs
– Virtual COM port (CDC)
• USB Powered
The ATmega4809 Xplained Pro user guide covers how to power the kit and the detailed information on
board components, extension interface, and the hardware guide.
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Get the Tools
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3.2 Get the STK600 Starter Kit
Figure 3-2. STK600 Starter Kit
Table 3-1. STK600 Device Support for megaAVR 0-Series
Device Routing Card Socket Card
ATmega3209 STK600-RC048M-107 STK600-QFN48
ATmega3209 STK600-RC048M-107 STK600-TQFP48
ATmega4809 STK600-RC048M-107 STK600-QFN48
ATmega4809 STK600-RC048M-107 STK600-TQFP48
For device support for other devices, refer to: http://www.microchip.com/STK600_Starter_Kit-
Users_Guide
Web page: http://www.microchip.com/ATSTK600
Get the kit: http://www.microchipdirect.com/ProductSearch.aspx?Keywords=ATSTK600
Document/file:
• STK600 User Guide (.pdf)
Key features
• AVR Studio 4/AVR32 Studio/AVR Studio 5/Atmel Studio Compatible
• USB Interface to PC for Programming and Control
• Powered from USB Bus or from an External 10-15V DC Power Supply
• Adjustable Target VCC (0-5.5V)
• Two Adjustable Reference Voltages with High Accuracy (0-5.0V, 10mV res.)
• Clock Oscillator, Adjustable On-The-Fly from Atmel Studio (0-50MHz, 0.1% res.)
• Serial In-System Programming (ISP) of tinyAVR® and megaAVR® Devices
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Get the Tools
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• PDI Programming of AVR XMEGA® Devices
• JTAG Programming of megaAVR, AVR XMEGA, and AVR UC3 Devices
• aWire Programming of AVR UC3 Devices
• ISP and JTAG Programming of AVR Devices in External Target Systems
• Flexible Routing and Socket Card System for Easy Mounting of all Supported Devices
• Eight Push Buttons for General Use
• Eight LEDs for General Use
• All AVR I/O Ports are Easily Accessible through Pin Header Connectors
• Expansion Connectors for Plug-In Modules and Prototyping Area
• On-Board 4Mb DataFlash for Non-volatile Data
• USB mini-AB (On-The-Go) Connector for AVR Devices with USB
• PHY and DSUB-9 Connector for RS-232 Interface
• PHY and DSUB-9 Connector for CAN Bus
• PHY and Header for LIN Bus
• Device Board with an ATmega2560 AVR Microcontroller Included
The STK600 User Guide describes how to power the kit, the detailed information on board components,
extension interface, and the hardware guide.
3.3 Get Source Code from Atmel | START
The example code is available through Atmel | START, which is a web-based tool that enables
configuration of application code through a Graphical User Interface (GUI). The code can be downloaded
for both Atmel Studio 7.0 and IAR Embedded Workbench® via the direct example code-link(s) below or
the BROWSE EXAMPLES button on the Atmel | START front page.
Atmel | START web page: http://microchip.com/start
Example Code
Finding example code for devices in the megaAVR 0-series, can be done by searching for the device
name, e.g. ATmega4809, in the Atmel | START example browser.
Press User guide in Atmel | START for details and information about example projects. The User guide
button can be found in the example browser, and by clicking the project name in the dashboard view
within the Atmel | START project configurator.
Atmel Studio
Download the code as an .atzip file for Atmel Studio from the example browser in Atmel | START, by
clicking DOWNLOAD SELECTED EXAMPLE. To download the file from within Atmel | START, click
EXPORT PROJECT followed by DOWNLOAD PACK.
Double-click the downloaded .atzip file and the project will be imported to Atmel Studio 7.0.
IAR Embedded Workbench
For information on how to import the project in IAR Embedded Workbench, open the Atmel | START user
guide, select Using Atmel Start Output in External Tools, and IAR Embedded Workbench. A link to the
Atmel | START user guide can be found by clicking About from the Atmel | START front page or Help And
Support within the project configurator, both located in the upper right corner of the page.
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Get the Tools
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3.4 Get Atmel Studio 7.0
Web page: http://www.microchip.com/development-tools/atmel-studio-7
Document/file:
• Atmel Studio 7.0 (build 1645) Installer (.exe)
Atmel Studio 7.0 or later is the preferred IDE for developing and debugging firmware for the megaAVR®
0-series.
For device support, refer to Get Device Support.
3.5 Get IAR Embedded Workbench for AVR
Web page: https://www.iar.com/iar-embedded-workbench/#!?architecture=AVR
Document/file: IAR Embedded Workbench® installer for AVR.
3.6 Get Device Support
Atmel Studio: Support for new devices in Atmel Studio can be added by using the Device Pack
Manager, which is found under Tools->Device Pack Manager.
For megaAVR® 0-series, update to the latest version by performing the following steps:
1. Click Check for Updates
2. For megaAVR® 0-series, select the latest available version of ATmega_DFP
3. Click Install
For offline installers, go to http://packs.download.atmel.com/. To install a pack, double click on the
installer file and follow the instructions. Any open Atmel Studio windows will have to be closed for the
installation to take effect.
IAR: Support for new devices in IAR Embedded Workbench can be added by installing the latest service
pack. The service pack is available from My Pages on https://iar.com.
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Get the Tools
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4. Atmel Studio Users Getting Started
4.1 Atmel Studio with ATmega4809 Xplained Pro
Prerequisites
• Atmel Studio 7.0 1645 or above installed
• The ATmega4809 Xplained Pro board connected to Atmel Studio 7.0 via the on-board USB
connector, which is connected to the embedded debugger. The kit will be powered by the USB, and
the embedded debugger will enable debugging and programming via the USB.
Workflow
1. Launch Atmel Studio 7.0.
2. The page shown in the figure below will appear when ATmega4809 Xplained Pro is connected to
Atmel Studio 7.0.
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Atmel Studio Users Getting Started
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Figure 4-1. ATmega4809 Xplained Pro Page in Atmel Studio
3. Start creating a new project by clicking New → Project... or by using the shortcut Ctrl+Shift+N, as
shown in the figure below.
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Atmel Studio Users Getting Started
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Figure 4-2. Create New Project in Atmel Studio
4. Select the GCC C Executable Project template from the new project wizard shown in the figure
below, type in the name of the solution and project (e.g. GETTING_STARTED and LED_TOGGLE),
and click OK.
Figure 4-3. New Project Wizard
5. Select ATmega4809 from the device selection wizard as shown in the figure below, and click OK.
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Atmel Studio Users Getting Started
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Figure 4-4. Device Selection Wizard
A new project with a main.c file associated with it, will be generated in Atmel Studio.
6. Replace the main loop in the main.c file with the following code snippet:
int main (void)
{
/* Configure SW0 as input */
PORTB.DIRCLR = PIN2_bm;
/* Configure LED0 pin as output */
PORTB.DIRSET = PIN5_bm;
while (1)
{
/* Check the status of SW0 */
/* 0: Pressed */
if (!(PORTB.IN & (PIN2_bm)))
{
/* LED0 on */
PORTB.OUTSET = PIN5_bm;
}
/* 1: Released */
else
{
/* LED0 off */
PORTB.OUTCLR = PIN5_bm;
}
}
}
In the code editor, the code should appear as shown in the figure below.
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Atmel Studio Users Getting Started
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Figure 4-5. Code Editor Window
7. Open project properties by clicking Project → Properties or by using the shortcut ALT+F7.
8. In the Tool view (see the figure below) set Selected debugger/programmer to mEDBG and Interface
to UPDI.
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Atmel Studio Users Getting Started
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Figure 4-6. Debugger and Interface for ATmega4809
9. Build the project by clicking Build → Build Solution or by using the shortcut F7.
10. Program ATmega4809 with the project code and start debugging by clicking Debug → Start
debugging and break or by using the shortcut ALT+F5. The application is programmed onto the
device and program execution should break in main.
11. Run the code by clicking Debug → Continue or by using the shortcut F5).
12. Verify that LED0 is lit when SW0 is pushed on the ATmega4809 Xplained Pro.
4.2 Atmel Studio with STK600
Prerequisites
• Atmel Studio 7.0 1645 or above installed
• The STK600 board connected to Atmel Studio 7.0 via the on-board USB connector.
Workflow
1. Launch Atmel Studio 7.0.
2. Start creating a new project by clicking New → Project... or by using the shortcut Ctrl+Shift+N, as
shown in the figure below.
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Atmel Studio Users Getting Started
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Figure 4-7. Create New Project in Atmel Studio
3. Select the GCC C Executable Project template from the new project wizard shown in the figure
below, type in the name of the solution and project (e.g. GETTING_STARTED and LED_TOGGLE),
and click OK.
Figure 4-8. New Project Wizard
4. Select ATmega4809 from the device selection wizard as shown in the figure below, and click OK.
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Atmel Studio Users Getting Started
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Figure 4-9. Device Selection Wizard
A new project with a main.c file associated with it will be generated in Atmel Studio.
5. Replace the main function in the main.c file with the following code snippet:
int main (void)
{
/* STK600 have eight User Buttons and eight User LEDs which can be connected to any IO
pin using cables */
/* Configure PB0 as input (remember to connect SW0 to PB0 using a cable */
PORTB.DIRCLR = PIN0_bm;
/* Configure PB1 as output (remember to connect LED0 to PB1 using a cable*/
PORTB.DIRSET = PIN1_bm;
while (1)
{
/* Check the status of SW0 */
/* 0: Pressed */
if (!(PORTB.IN & (PIN0_bm)))
{
/* LED0 on */
PORTB.OUTCLR = PIN1_bm;
}
/* 1: Released */
else
{
/* LED0 off */
PORTB.OUTSET = PIN1_bm;
}
}
}
In the code editor, the code should appear as shown in the figure below.
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Atmel Studio Users Getting Started
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Figure 4-10. Code Editor Window
6. Open project properties by clicking Project → Properties or by using the shortcut ALT+F7.
7. In the Tool view (see the figure below) set Selected debugger/programmer to STK600 and Interface
to UPDI.
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Atmel Studio Users Getting Started
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Figure 4-11. Debugger and Interface for ATmega4809
8. Build the project by clicking Build → Build Solution or using the shortcut F7.
9. Connect the embedded debugger on STK600 to ATmega4809 by connecting a cable between the
ISP/PDI headers, as shown in the figure below.
Figure 4-12. UPDIConnection on STK600
10. Connect PB2 to SW0, and PB5 to LED0 by using cables.
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Atmel Studio Users Getting Started
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11. Load the code onto the STK600 and start debugging by clicking Debug → Start debugging and
break or by using the shortcut ALT+F5. The application is programmed onto the device and the
program execution should break in main.
12. Run the code by clicking Debug → Continue or by using the shortcut F5.
13. Verify that LED0 is lit when SW0 is pushed on STK600.
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Atmel Studio Users Getting Started
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