snippets/ev3/buttons_quickstart: initial project

This is a demo of: - multi-file project - using images - creating a "menu" This program can be started away from the competition table. Then a mission can be quickly activated by pressing one of the buttons.
2026-09-14 18:44:20 +00:00 · 2020-03-20 13:58:09 +01:00
parent 90f2522068
commit af926c5f19
8 changed files with 195 additions and 0 deletions
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+__pycache__/
+*.pyc
+venv/
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+{
+	// See http://go.microsoft.com/fwlink/?LinkId=827846 to learn about workspace recommendations.
+	// Extension identifier format: ${publisher}.${name}. Example: vscode.csharp
+
+	// List of extensions which should be recommended for users of this workspace.
+	"recommendations": [
+		"lego-education.ev3-micropython"
+	],
+	// List of extensions recommended by VS Code that should not be recommended for users of this workspace.
+	"unwantedRecommendations": [
+		"ms-python.python"
+	]
+}
@@ -0,0 +1,14 @@
+{
+	// Use IntelliSense to learn about possible attributes.
+	// Hover to view descriptions of existing attributes.
+	// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
+	"version": "0.2.0",
+	"configurations": [
+		{
+			"name": "Download and Run",
+			"type": "ev3devBrowser",
+			"request": "launch",
+			"program": "/home/robot/${workspaceRootFolderName}/main.py"
+		}
+	]
+}
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+// Place your settings in this file to overwrite default and user settings.
+{
+	"files.eol": "\n",
+	"debug.openDebug": "neverOpen",
+	"python.linting.enabled": false,
+	"ev3devBrowser.download.exclude": "{**/.*,**/*.svg}"
+}
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+#!/usr/bin/env pybricks-micropython
+
+from pybricks.hubs import EV3Brick
+from pybricks.parameters import Button
+
+from menu import wait_for_button
+
+# Initialize the EV3.
+ev3 = EV3Brick()
+
+while True:
+    # Show the menu and wait for one button to be selected.
+    button = wait_for_button(ev3)
+
+    # Now you can do something, based on which button was pressed.
+
+    # In this demo, we just play a different sound for each button.
+    if button == Button.LEFT:
+        ev3.speaker.beep(200)
+    elif button == Button.RIGHT:
+        ev3.speaker.beep(400)
+    elif button == Button.UP:
+        ev3.speaker.beep(600)
+    elif button == Button.DOWN:
+        ev3.speaker.beep(800)
+    elif button == Button.CENTER:
+        ev3.speaker.beep(1000)
@@ -0,0 +1,30 @@
+def wait_for_button(ev3):
+    """
+    This function shows a picture of the buttons on the EV3 screen.
+
+    Then it waits until you press a button.
+
+    It returns which button was pressed.
+    """
+
+    # Show a picture of the buttons on the screen.
+    ev3.screen.load_image('buttons.png')
+
+    # Tip: add text or icons to the image to help you
+    # remember what each button will do in your program.
+
+    # Wait for a single button to be pressed and save the result.
+    pressed = []
+    while len(pressed) != 1:
+        pressed = ev3.buttons.pressed()
+    button = pressed[0]
+
+    # Print which button was pressed
+    ev3.screen.draw_text(2, 100, button)
+
+    # Now wait for the button to be released.
+    while any(ev3.buttons.pressed()):
+        pass
+
+    # Return which button was pressed.
+    return button