Add traffic lights

traffic_lights/.gitignore

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+.pio
+CMakeListsPrivate.txt
+cmake-build-*/ 

traffic_lights/.idea/.gitignore

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+# Default ignored files
+/shelf/
+/workspace.xml
+# Datasource local storage ignored files
+/dataSources/
+/dataSources.local.xml
+# Editor-based HTTP Client requests
+/httpRequests/

traffic_lights/.idea/misc.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="CMakeWorkspace" PROJECT_DIR="$PROJECT_DIR$" />
+  <component name="CidrRootsConfiguration">
+    <excludeRoots>
+      <file path="$PROJECT_DIR$/.pio" />
+      <file path="$PROJECT_DIR$/cmake-build-debug" />
+    </excludeRoots>
+  </component>
+</project>

traffic_lights/.idea/modules.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="ProjectModuleManager">
+    <modules>
+      <module fileurl="file://$PROJECT_DIR$/.idea/traffic_lights.iml" filepath="$PROJECT_DIR$/.idea/traffic_lights.iml" />
+    </modules>
+  </component>
+</project>

traffic_lights/.idea/traffic_lights.iml

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+<?xml version="1.0" encoding="UTF-8"?>
+<module classpath="CMake" type="CPP_MODULE" version="4" />

traffic_lights/.idea/vcs.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<project version="4">
+  <component name="VcsDirectoryMappings">
+    <mapping directory="$PROJECT_DIR$/.." vcs="Git" />
+  </component>
+</project>

traffic_lights/CMakeLists.txt

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+# !!! WARNING !!! AUTO-GENERATED FILE, PLEASE DO NOT MODIFY IT AND USE
+# https://docs.platformio.org/page/projectconf/section_env_build.html#build-flags
+#
+# If you need to override existing CMake configuration or add extra,
+# please create `CMakeListsUser.txt` in the root of project.
+# The `CMakeListsUser.txt` will not be overwritten by PlatformIO.
+
+cmake_minimum_required(VERSION 3.13)
+set(CMAKE_SYSTEM_NAME Generic)
+set(CMAKE_C_COMPILER_WORKS 1)
+set(CMAKE_CXX_COMPILER_WORKS 1)
+
+project("traffic_lights" C CXX)
+
+include(CMakeListsPrivate.txt)
+
+if(EXISTS ${CMAKE_CURRENT_SOURCE_DIR}/CMakeListsUser.txt)
+include(CMakeListsUser.txt)
+endif()
+
+add_custom_target(
+    Production ALL
+    COMMAND platformio -c clion run "$<$<NOT:$<CONFIG:All>>:-e${CMAKE_BUILD_TYPE}>"
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+)
+
+add_custom_target(
+    Debug ALL
+    COMMAND platformio -c clion run --target debug "$<$<NOT:$<CONFIG:All>>:-e${CMAKE_BUILD_TYPE}>"
+    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
+)
+
+add_executable(Z_DUMMY_TARGET ${SRC_LIST})

traffic_lights/include/README

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+
+This directory is intended for project header files.
+
+A header file is a file containing C declarations and macro definitions
+to be shared between several project source files. You request the use of a
+header file in your project source file (C, C++, etc) located in `src` folder
+by including it, with the C preprocessing directive `#include'.
+
+```src/main.c
+
+#include "header.h"
+
+int main (void)
+{
+ ...
+}
+```
+
+Including a header file produces the same results as copying the header file
+into each source file that needs it. Such copying would be time-consuming
+and error-prone. With a header file, the related declarations appear
+in only one place. If they need to be changed, they can be changed in one
+place, and programs that include the header file will automatically use the
+new version when next recompiled. The header file eliminates the labor of
+finding and changing all the copies as well as the risk that a failure to
+find one copy will result in inconsistencies within a program.
+
+In C, the usual convention is to give header files names that end with `.h'.
+It is most portable to use only letters, digits, dashes, and underscores in
+header file names, and at most one dot.
+
+Read more about using header files in official GCC documentation:
+
+* Include Syntax
+* Include Operation
+* Once-Only Headers
+* Computed Includes
+
+https://gcc.gnu.org/onlinedocs/cpp/Header-Files.html

traffic_lights/include/lib.h

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+//
+// Created by Gabriel Augendre on 27/04/2021.
+//
+
+#ifndef TOY_PROJECTS_LIB_H
+#define TOY_PROJECTS_LIB_H
+
+#define GREEN 2
+#define YELLOW 3
+#define RED 4
+#define BUZZER 5
+#define BUTTON 6
+#define BUZZ_DURATION 100
+#define BUZZ_FREQUENCY 440
+
+/**
+ * Block until the button is pressed.
+ */
+void waitForButton();
+
+/**
+ * Make the buzzer beep n times.
+ * @param n number of times the buzzer should beep.
+ */
+void beep(int n);
+
+/**
+ * Make the buzzer beep once.
+ * See `beep(int)` for more control.
+ */
+void beep();
+
+#endif //TOY_PROJECTS_LIB_H

traffic_lights/lib/README

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+
+This directory is intended for project specific (private) libraries.
+PlatformIO will compile them to static libraries and link into executable file.
+
+The source code of each library should be placed in a an own separate directory
+("lib/your_library_name/[here are source files]").
+
+For example, see a structure of the following two libraries `Foo` and `Bar`:
+
+|--lib
+|  |
+|  |--Bar
+|  |  |--docs
+|  |  |--examples
+|  |  |--src
+|  |     |- Bar.c
+|  |     |- Bar.h
+|  |  |- library.json (optional, custom build options, etc) https://docs.platformio.org/page/librarymanager/config.html
+|  |
+|  |--Foo
+|  |  |- Foo.c
+|  |  |- Foo.h
+|  |
+|  |- README --> THIS FILE
+|
+|- platformio.ini
+|--src
+   |- main.c
+
+and a contents of `src/main.c`:
+```
+#include <Foo.h>
+#include <Bar.h>
+
+int main (void)
+{
+  ...
+}
+
+```
+
+PlatformIO Library Dependency Finder will find automatically dependent
+libraries scanning project source files.
+
+More information about PlatformIO Library Dependency Finder
+- https://docs.platformio.org/page/librarymanager/ldf.html

traffic_lights/lib/lib.cpp

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+//
+// Created by Gabriel Augendre on 27/04/2021.
+//
+
+#include "lib.h"
+
+void waitForButton() {
+    while (digitalRead(BUTTON) == HIGH) {}
+}
+
+void beep(int n) {
+    for (int i = 0; i < n; i++) {
+        tone(BUZZER, BUZZ_FREQUENCY, BUZZ_DURATION);
+        delay(BUZZ_DURATION * 2);
+    }
+}
+
+void beep() {
+    beep(1);
+}

traffic_lights/platformio.ini

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+; PlatformIO Project Configuration File
+;
+;   Build options: build flags, source filter
+;   Upload options: custom upload port, speed and extra flags
+;   Library options: dependencies, extra library storages
+;   Advanced options: extra scripting
+;
+; Please visit documentation for the other options and examples
+; https://docs.platformio.org/page/projectconf.html
+
+[env:uno]
+platform = atmelavr
+board = uno
+framework = arduino

traffic_lights/src/main.cpp

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+#include <Arduino.h>
+#include "lib.h"
+
+void setup() {
+    pinMode(GREEN, OUTPUT);
+    pinMode(YELLOW, OUTPUT);
+    pinMode(RED, OUTPUT);
+    pinMode(BUZZER, OUTPUT);
+    // assumes the button connects to GND when pressed
+    pinMode(BUTTON, INPUT_PULLUP);
+}
+
+void loop() {
+    digitalWrite(RED, LOW);
+    digitalWrite(YELLOW, LOW);
+    digitalWrite(GREEN, HIGH);
+    waitForButton();
+    beep();
+    delay(1000);
+    digitalWrite(GREEN, LOW);
+    digitalWrite(YELLOW, HIGH);
+    delay(3000);
+    digitalWrite(YELLOW, LOW);
+    digitalWrite(RED, HIGH);
+    beep(2);
+    delay(5000);
+    beep(3);
+    delay(2000);
+    digitalWrite(YELLOW, HIGH);
+}

traffic_lights/test/README

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+
+This directory is intended for PlatformIO Unit Testing and project tests.
+
+Unit Testing is a software testing method by which individual units of
+source code, sets of one or more MCU program modules together with associated
+control data, usage procedures, and operating procedures, are tested to
+determine whether they are fit for use. Unit testing finds problems early
+in the development cycle.
+
+More information about PlatformIO Unit Testing:
+- https://docs.platformio.org/page/plus/unit-testing.html