Initial commit.

.gitignore

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+.pio
+.pioenvs
+.piolibdeps

.travis.yml

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+# Continuous Integration (CI) is the practice, in software
+# engineering, of merging all developer working copies with a shared mainline
+# several times a day < https://docs.platformio.org/page/ci/index.html >
+#
+# Documentation:
+#
+# * Travis CI Embedded Builds with PlatformIO
+#   < https://docs.travis-ci.com/user/integration/platformio/ >
+#
+# * PlatformIO integration with Travis CI
+#   < https://docs.platformio.org/page/ci/travis.html >
+#
+# * User Guide for `platformio ci` command
+#   < https://docs.platformio.org/page/userguide/cmd_ci.html >
+#
+#
+# Please choose one of the following templates (proposed below) and uncomment
+# it (remove "# " before each line) or use own configuration according to the
+# Travis CI documentation (see above).
+#
+
+
+#
+# Template #1: General project. Test it using existing `platformio.ini`.
+#
+
+# language: python
+# python:
+#     - "2.7"
+#
+# sudo: false
+# cache:
+#     directories:
+#         - "~/.platformio"
+#
+# install:
+#     - pip install -U platformio
+#     - platformio update
+#
+# script:
+#     - platformio run
+
+
+#
+# Template #2: The project is intended to be used as a library with examples.
+#
+
+# language: python
+# python:
+#     - "2.7"
+#
+# sudo: false
+# cache:
+#     directories:
+#         - "~/.platformio"
+#
+# env:
+#     - PLATFORMIO_CI_SRC=path/to/test/file.c
+#     - PLATFORMIO_CI_SRC=examples/file.ino
+#     - PLATFORMIO_CI_SRC=path/to/test/directory
+#
+# install:
+#     - pip install -U platformio
+#     - platformio update
+#
+# script:
+#     - platformio ci --lib="." --board=ID_1 --board=ID_2 --board=ID_N

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

include/buttons.h

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+#pragma once
+
+#include "controller.h"
+
+class Buttons {
+private:
+	unsigned long _debounce_until = 0;
+	Controller* _controller;
+	void _debounce();
+public:
+	Buttons(Controller* c) : _controller(c) {}
+	void setup();
+	void loop();
+};

include/config.h

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+#pragma once
+#include <Arduino.h>
+
+#define PIN_SD_CS            D1
+#define PIN_VS1053_CS        D2
+#define PIN_RC522_CS         D3
+
+#define PIN_BTN_VOL_UP       D4
+#define PIN_BTN_VOL_DOWN     D5
+#define PIN_BTN_TRACK_NEXT   D6
+#define PIN_BTN_TRACK_PREV   D7
+
+#define DEBOUNCE_MILLIS      100

include/controller.h

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+#pragma once
+
+#include "player.h"
+
+class Controller {
+private:
+	Player* _player;
+
+public:
+	Controller(Player* p) : _player(p) {}
+	void vol_up();
+	void vol_down();
+	void track_next();
+	void track_prev();
+};

include/player.h

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+#pragma once
+
+class Player {
+public:
+	void vol_up();
+	void vol_down();
+	void track_next();
+	void track_prev();
+};

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:esp12e]
+platform = espressif8266
+board = esp12e
+framework = arduino

src/buttons.cpp

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+#include <Arduino.h>
+#include "buttons.h"
+#include "config.h"
+
+void Buttons::setup() {
+	pinMode(PIN_BTN_VOL_UP, INPUT);
+	pinMode(PIN_BTN_VOL_DOWN, INPUT);
+	pinMode(PIN_BTN_TRACK_NEXT, INPUT);
+	pinMode(PIN_BTN_TRACK_PREV, INPUT);
+}
+
+void Buttons::_debounce() {
+	unsigned long now = millis();
+	_debounce_until = now + DEBOUNCE_MILLIS;
+	if (_debounce_until < now) _debounce_until = now;
+}
+
+void Buttons::loop() {
+	bool vol_up = digitalRead(PIN_BTN_VOL_UP);
+	bool vol_down = digitalRead(PIN_BTN_VOL_DOWN);
+	bool track_next = digitalRead(PIN_BTN_TRACK_NEXT);
+	bool track_prev = digitalRead(PIN_BTN_TRACK_PREV);
+	
+	if (_debounce_until > millis()) {
+		if (vol_up || vol_down || track_next || track_prev) {
+			_debounce();
+		}
+		return;
+	}
+	
+	if (vol_up) {
+		_controller->vol_up();
+	} else if (vol_down) {
+		_controller->vol_down();
+	} else if (track_next) {
+		_controller->track_next();
+	} else if (track_prev) {
+		_controller->track_prev();
+	} else {
+		// If we reach this, no button was pressed and we are not debouncing -> do nothing.
+		return;
+	}
+	
+	// If we reach this, some button was pressed. So enable debouncing.
+	_debounce();
+}

src/controller.cpp

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+#include "controller.h"
+
+void Controller::vol_up() {
+	_player->vol_up();
+}
+
+void Controller::vol_down() {
+	_player->vol_down();
+}
+
+void Controller::track_next() {
+	_player->track_next();
+}
+
+void Controller::track_prev() {
+	_player->track_prev();
+}

src/main.cpp

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+#include <Arduino.h>
+#include "config.h"
+#include "buttons.h"
+#include "controller.h"
+#include "player.h"
+
+Buttons* buttons;
+Controller* controller;
+Player* player;
+
+void setup() {
+	player = new Player();
+	controller = new Controller(player);
+	buttons = new Buttons(controller);
+}
+
+void loop() {
+
+}

test/README

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+
+This directory is intended for PIO 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 PIO Unit Testing:
+- https://docs.platformio.org/page/plus/unit-testing.html