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118 lines
4.1 KiB
ReStructuredText
118 lines
4.1 KiB
ReStructuredText
Creating and running programs
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Now that you've set up your computer and your EV3 brick, you're ready to start writing programs.
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Programs are organized into *project folders*, as shown below. A project folder is a directory on your computer that contains the main program (**main.py**), and other optional scripts or files. This project folder and all of its contents will be copied to the EV3, where the main program will be run.
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This page shows you how to create such a project and how to transfer it to the EV3.
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.. figure:: images/projectstructure.png
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:width: 100 %
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:alt: alt
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:align: center
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A project contains a program called **main.py** and optional resources like sounds or Python modules.
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Creating a new project
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To create a new project, open the Pybricks tab and click *create a new project*. Enter a project name in the text field that appears, and press *Enter*. When prompted, choose for a location for this program and confirm by clocking *choose folder*. This is summarized in the diagram below.
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.. figure:: images/newproject.png
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:width: 100 %
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:alt: alt
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:align: center
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Creating a new project. This example is called *getting_started*, but you can choose any name.
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When you create a new project, it already includes an example *main.py* file that you can modify and extend. To see its contents and to modify it, open it from the file browser as shown below.
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If you are new to Python or MicroPython programming, we recommend that you keep the existing code in place, and write your own code below it.
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.. figure:: images/projectoverview.png
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:width: 100 %
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:alt: alt
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:align: center
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Opening the default *main.py* program.
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Setting up the connection
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You'll now learn how to transfer your project to the EV3 brick and run the main program.
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First, make sure that your EV3 is turned on and that it is connected to your computer. Then, follow the steps below to configure the connection.
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.. figure:: images/connecting.png
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:width: 100 %
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:alt: alt
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:align: center
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Configuring the connection between the computer and the EV3
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Downloading and running a program
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You can press the F5 key to run your program. Alternatively, you can start it manually by going to the *debug* tab, and clicking the green start arrow, as shown below.
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When the program starts, a pop up toolbar allows you to stop the program if necessary. If your program produces any output, this is shown in the output window.
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.. figure:: images/running.png
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:width: 100 %
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:alt: alt
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:align: center
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Running a program
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Expanding the example program
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Now that you've run the basic code template, let's expand the program to make a motor move. First, attach a Large Motor to Port B on the EV3 brick, as shown below.
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.. figure:: images/firstprogram.png
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:width: 100 %
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:alt: alt
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:align: center
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The EV3 brick with a Large Motor attached to port B.
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Next, edit *main.py* such that looks like this:
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.. literalinclude:: ../../examples/ev3/getting_started/main.py
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When you run the program, you'll hear a beep, the motor rotates, and you'll hear another higher pitched beep.
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.. _managefiles:
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Managing files on the EV3
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After you've downloaded a project to the EV3, you can run, delete, or back up programs stored on the EV3, as shown in the diagram below.
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.. figure:: images/files.png
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:width: 100 %
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:alt: alt
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:align: center
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The EV3 brick with a Large Motor attached to port B.
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Running a program without a computer
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After you've downloaded your project to your EV3 brick, you can restart it even when it is not connected to a computer. To do so, find the file using the *file browser* and use the *Enter* key to start the program.
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.. figure:: images/manualrun.png
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:width: 100 %
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:alt: alt
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:align: center
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Starting a program using the buttons of the EV3 brick
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