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MPAE-8144: Added projects and updated metadata.
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‎.main-meta/main.json

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"name": "com.microchip.mcu8.studio.project.atmega4809-getting-started-with-usart-studio",
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"displayName": "Getting Started with USART",
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"projectName": "atmega4809-getting-started-with-usart-studio",
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"shortDescription": "",
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"shortDescription": "This repository contains 5 bare metal code examples described in the TB3216-Getting Started with USART.",
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"name": "STUDIO",
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"name": "ATmega_DFP",
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"name": "START",
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"author": "Microchip",
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"START",
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[
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"Peripherals",
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"USART"
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],
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[
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"Development Kit",
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"ATmega4809 Xplained Pro"
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]
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],
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"peripherals": [
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"USART"
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],
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"keywords": [
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],

‎One_Wire_Mode/One_Wire_Mode.componentinfo.xml

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<AbsolutePath>C:/Program Files (x86)\Atmel\Studio\7.0\Packs\Atmel\ATmega_DFP\1.5.362\gcc\dev\atmega4809</AbsolutePath>
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<PackName>ATmega_DFP</PackName>
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<PackPath>C:/Program Files (x86)/Atmel/Studio/7.0/Packs/Atmel/ATmega_DFP/1.5.362/Atmel.ATmega_DFP.pdsc</PackPath>
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‎One_Wire_Mode/One_Wire_Mode.cproj

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<?xml version="1.0" encoding="utf-8"?>
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<Project DefaultTargets="Build" xmlns="http://schemas.microsoft.com/developer/msbuild/2003" ToolsVersion="14.0">
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<PropertyGroup>
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<SchemaVersion>2.0</SchemaVersion>
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<ProjectVersion>7.0</ProjectVersion>
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<ToolchainName>com.Atmel.AVRGCC8.C</ToolchainName>
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<ProjectGuid>{ff5de5c2-0859-4a14-80f5-f49a52360ebe}</ProjectGuid>
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<avrdevice>ATmega4809</avrdevice>
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<avrdeviceseries>none</avrdeviceseries>
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<OutputType>Executable</OutputType>
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<Language>C</Language>
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<OutputFileName>$(MSBuildProjectName)</OutputFileName>
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<OutputFileExtension>.elf</OutputFileExtension>
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<OutputDirectory>$(MSBuildProjectDirectory)\$(Configuration)</OutputDirectory>
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<AssemblyName>One_Wire_Mode</AssemblyName>
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<Name>One_Wire_Mode</Name>
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<RootNamespace>One_Wire_Mode</RootNamespace>
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<ToolchainFlavour>Native</ToolchainFlavour>
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<KeepTimersRunning>true</KeepTimersRunning>
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<OverrideVtor>false</OverrideVtor>
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<CacheFlash>true</CacheFlash>
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<ProgFlashFromRam>true</ProgFlashFromRam>
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<RamSnippetAddress>0x20000000</RamSnippetAddress>
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<UncachedRange />
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<preserveEEPROM>true</preserveEEPROM>
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<OverrideVtorValue>exception_table</OverrideVtorValue>
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<BootSegment>2</BootSegment>
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<ResetRule>0</ResetRule>
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<eraseonlaunchrule>0</eraseonlaunchrule>
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<EraseKey />
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<AsfFrameworkConfig>
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<framework-data xmlns="">
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<options />
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<files />
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<dependencies>
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<content-extension eid="atmel.asf" uuidref="Atmel.ASF" version="3.49.1" />
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</dependencies>
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</framework-data>
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</AsfFrameworkConfig>
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<avrtool>com.atmel.avrdbg.tool.edbg</avrtool>
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<avrtoolserialnumber>ATML3074061800002074</avrtoolserialnumber>
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<avrdeviceexpectedsignature>0x1E9651</avrdeviceexpectedsignature>
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<avrtoolinterface>UPDI</avrtoolinterface>
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<com_atmel_avrdbg_tool_edbg>
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<ToolOptions>
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<InterfaceProperties>
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<UpdiClock>500000</UpdiClock>
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</InterfaceProperties>
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<InterfaceName>UPDI</InterfaceName>
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</ToolOptions>
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<ToolType>com.atmel.avrdbg.tool.edbg</ToolType>
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<ToolNumber>ATML3074061800002074</ToolNumber>
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<ToolName>EDBG</ToolName>
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</com_atmel_avrdbg_tool_edbg>
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<avrtoolinterfaceclock>500000</avrtoolinterfaceclock>
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</PropertyGroup>
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<PropertyGroup Condition=" '$(Configuration)' == 'Release' ">
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<ToolchainSettings>
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<AvrGcc>
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<avrgcc.common.Device>-mmcu=atmega4809 -B "%24(PackRepoDir)\Atmel\ATmega_DFP\1.5.362\gcc\dev\atmega4809"</avrgcc.common.Device>
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<avrgcc.compiler.optimization.level>Optimize for size (-Os)</avrgcc.compiler.optimization.level>
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<avrgcc.common.Device>-mmcu=atmega4809 -B "%24(PackRepoDir)\Atmel\ATmega_DFP\1.5.362\gcc\dev\atmega4809"</avrgcc.common.Device>
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<Import Project="$(AVRSTUDIO_EXE_PATH)\\Vs\\Compiler.targets" />
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‎One_Wire_Mode/README.md

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<!-- Please do not change this logo with link -->
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[![MCHP](../images/microchip.png)](https://www.microchip.com)
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# One Wire Mode
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This program shows how to configure the Universal Synchronous and Asynchronous Receiver and Transmitter (USART) in one wire mode. In this mode the Receive (RX) and Transmit (TX) functions use the same pin and the communication becomes half duplex. All the transmitted characters loop-back to the receive buffer and can be compared to check for bus conflicts.
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The applications sends the string 'Microchip.\r\n' every 500 ms through the pin used for both RX and TX.
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## Related Documentation
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More details and code examples on the ATMEGA4809 can be found at the following links:
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- [TB3216-Getting Started with USART](https://ww1.microchip.com/downloads/en/Appnotes/TB3216-Getting-Started-with-USART-90003216B.pdf)
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- [ATMEGA4809 Product Page](https://www.microchip.com/wwwproducts/en/ATMEGA4809)
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- [ATMEGA4809 Code Examples on GitHub](https://github.com/microchip-pic-avr-examples?q=atmega4809)
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- [ATMEGA4809 Project Examples in START](https://start.atmel.com/#examples/ATMEGA4809XplainedPro)
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## Software Used
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- Microchip Studio 7.0.2397 or newer [(microchip.com/mplab/microchip-studio)](https://www.microchip.com/mplab/microchip-studio)
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- ATmega_DFP 1.5.362 or newer Device Pack
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## Hardware Used
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- ATMEGA4809 Xplained Pro [(ATMEGA4809-XPRO)](https://www.microchip.com/developmenttools/ProductDetails/ATMEGA4809-XPRO)
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## Setup
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The ATMEGA4809 Xplained Pro Development Board is used as test platform.
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<br><img src="../images/atmega4809_xplainedpro.jpg" height="300">
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The following configurations must be made for this project:
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- System clock configured for 3.33 MHz
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- Global interrupts enabled
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Initialize the USART1 instance with the following configurations:
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- 9600 baud rate
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- 8 data bits
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- no parity bit
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- 1 stop bit
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- Loop back mode enabled
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- RX and TX enabled
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- Receive Interrupt enabled
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|Pin | Configuration |
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| :---------------------: | :-------------------------------------------------: |
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| PC0 | RX/TX - digital input (initial configuration) |
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Note: The pin PC0 is configured as output when the microcontroller transmits messages, but it is configured as input in all the other cases.
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## Operation
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1. Connect the board to the PC.
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2. Open the **atmega4809-getting-started-with-usart-studio.atsln** solution in Microchip Studio.
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3. Set the **One_Wire_Mode** project as Start Up project. Right click on the project in the **Solution Explorer** tab and click **Set as StartUp Project**.
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<br><img src="../images/Start_Up_Project.PNG" height="500">
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4. Build the **One_Wire_Mode** project: right click on the **atmega4809-getting-started-with-usart-studio** solution and select Build Solution.
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<br><img src="../images/Build_Solution.PNG" height="500">
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5. Select the ATMEGA4809 Xplained Pro in the Connected Hardware Tool section of the project settings:
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- Right click on the project and click **Properties**;
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- Click on the **Tool** tab.
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- Select the ATMEGA4809 Xplained Pro (click on the **SN**) in the **Selected debugger/programmer** section, and save (CTRL + S):
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<br><img src="../images/Select_Tool.PNG" height="500">
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6. Program the project to the board. Then, click on the **Debug** tab and click Start Debugging and Break.
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<br><img src="images/StartDebugandBreak.png" height="300">
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7. Enable two breakpoints, as presented in the image below, and click Continue.
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<br><img src="images/breakpoints.png" height="235">
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## Demo
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When sending characters, the received one works as an acknowledgement. If the received character is the same with the sent one, the transmission is successfull.
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<br><img src="images/demo1.png" width="500">
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This image shows the string received in a terminal software.
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<br><img src="images/string_microchip.PNG" width="500">
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## Summary
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This project shows how to use the USART peripheral in One-Wire mode, in which both the transmitting and the receiving will be implemented using the same pin.

‎One_Wire_Mode/images/StartDebugandBreak.png

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‎One_Wire_Mode/images/breakpoints.png

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‎One_Wire_Mode/images/demo1.png

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‎One_Wire_Mode/images/string_microchip.PNG

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