Initial platformio commit

.gitignore

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+.pio
+.vscode/.browse.c_cpp.db*
+.vscode/c_cpp_properties.json
+.vscode/launch.json
+.vscode/ipch

.vscode/extensions.json

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+{
+    // See http://go.microsoft.com/fwlink/?LinkId=827846
+    // for the documentation about the extensions.json format
+    "recommendations": [
+        "platformio.platformio-ide"
+    ],
+    "unwantedRecommendations": [
+        "ms-vscode.cpptools-extension-pack"
+    ]
+}

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

lib/CarDriver/CarDriver.cpp

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+#include <CarDriver.h>
+
+boolean goesForward = false;
+
+NewPing sonar(trig_pin, echo_pin, maximum_distance); //sensor function
+Servo servo_motor; 
+
+void setupCar() {
+  pinMode(RightMotorForward, OUTPUT);
+  pinMode(LeftMotorForward, OUTPUT);
+  pinMode(LeftMotorBackward, OUTPUT);
+  pinMode(RightMotorBackward, OUTPUT);
+  
+  servo_motor.attach(ServoPin); //our servo pin
+  servo_motor.write(115);
+  delay(2000);
+  getPingDistance();
+  delay(100);
+  getPingDistance();
+  delay(100);
+  getPingDistance();
+  delay(100);
+  getPingDistance();
+  delay(100);
+}
+
+int lookRight() {  
+  servo_motor.write(50);
+  delay(500);
+  int distance = getPingDistance();
+  delay(100);
+  servo_motor.write(115);
+  return distance;
+}
+
+int lookLeft() {
+  servo_motor.write(170);
+  delay(500);
+  int distance = getPingDistance();
+  delay(100);
+  servo_motor.write(115);
+  delay(100);
+  return distance;
+}
+
+int getPingDistance() {
+  delay(70);
+  int cm = sonar.ping_cm();
+  if(cm == 0) {
+    return maximum_distance;
+  }
+  return cm;
+}
+
+void moveStop() {
+  digitalWrite(RightMotorForward, LOW);
+  digitalWrite(LeftMotorForward, LOW);
+  digitalWrite(RightMotorBackward, LOW);
+  digitalWrite(LeftMotorBackward, LOW);
+}
+
+void moveForward() {
+  if(!goesForward) {
+    goesForward = true;
+    
+    digitalWrite(LeftMotorForward, HIGH);
+    digitalWrite(RightMotorForward, HIGH);
+  
+    digitalWrite(LeftMotorBackward, LOW);
+    digitalWrite(RightMotorBackward, LOW); 
+  }
+}
+
+void moveBackward() {
+  goesForward = false;
+
+  digitalWrite(LeftMotorBackward, HIGH);
+  digitalWrite(RightMotorBackward, HIGH);
+  
+  digitalWrite(LeftMotorForward, LOW);
+  digitalWrite(RightMotorForward, LOW);
+  
+}
+
+void turnRight() {
+  digitalWrite(LeftMotorForward, HIGH);
+  digitalWrite(RightMotorBackward, HIGH);
+  
+  digitalWrite(LeftMotorBackward, LOW);
+  digitalWrite(RightMotorForward, LOW);
+  
+  delay(500);
+  
+  digitalWrite(LeftMotorForward, HIGH);
+  digitalWrite(RightMotorForward, HIGH);
+  
+  digitalWrite(LeftMotorBackward, LOW);
+  digitalWrite(RightMotorBackward, LOW);
+}
+
+void turnLeft() {
+  digitalWrite(LeftMotorBackward, HIGH);
+  digitalWrite(RightMotorForward, HIGH);
+  
+  digitalWrite(LeftMotorForward, LOW);
+  digitalWrite(RightMotorBackward, LOW);
+
+  delay(500);
+  
+  digitalWrite(LeftMotorForward, HIGH);
+  digitalWrite(RightMotorForward, HIGH);
+  
+  digitalWrite(LeftMotorBackward, LOW);
+  digitalWrite(RightMotorBackward, LOW);
+}

lib/CarDriver/CarDriver.h

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+#include <Servo.h>          //standard library for the servo
+#include <NewPing.h>        //for the Ultrasonic sensor function library.
+
+//L298N motor control pins
+const int LeftMotorForward = 5;
+const int LeftMotorBackward = 4;
+const int RightMotorForward = 6;
+const int RightMotorBackward = 7;
+
+// servo pins
+const int ServoPin = 3;
+
+//sensor pins
+#define echo_pin A1
+#define trig_pin A2
+
+#define maximum_distance 200
+
+void setupCar();
+int lookRight();
+int lookLeft();
+int getPingDistance();
+void moveStop();
+void moveForward();
+void moveBackward();
+void turnRight();
+void turnLeft();

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

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
+lib_deps = 
+	arduino-libraries/Servo@^1.1.8
+	teckel12/NewPing@^1.9.4

src/main.cpp

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+#include <Arduino.h>
+#include <CarDriver.h>
+
+void setup() {
+  setupCar();
+}
+
+void loop() {
+  int distance = 0;
+  int distanceRight = 0;
+  int distanceLeft = 0;
+  delay(50);
+
+  distance = getPingDistance();
+  if(distance <= 20) {
+    moveStop();
+    delay(300);
+    moveBackward();
+    delay(400);
+    moveStop();
+    delay(300);
+    distanceRight = lookRight();
+    delay(300);
+    distanceLeft = lookLeft();
+    delay(300);
+
+    if(distance >= distanceLeft) {
+      turnRight();
+      moveStop();
+    } else if(distance > distanceRight) {
+      turnLeft();
+      moveStop();
+    }
+  } else {
+    moveForward(); 
+  }
+}

test/README

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+
+This directory is intended for PlatformIO Test Runner 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/en/latest/advanced/unit-testing/index.html