init

.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"
+    ]
+}

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/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:az-delivery-devkit-v4]
+platform = espressif32
+board = az-delivery-devkit-v4
+framework = arduino
+monitor_port = COM[13]
+monitor_speed = 115200
+
+lib_deps = 
+	evert-arias/EasyBuzzer@^1.0.4
+	lbernstone/Tone32@^1.0.0

src/main.cpp

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+#include <Tone32.h>
+#include <NeoPixelBus.h>
+
+#define BUZZER_PIN 5
+#define BUZZER_CHANNEL 0
+const uint16_t PixelCount = 10; // this example assumes 4 pixels, making it smaller will cause a failure
+// make sure to set this to the correct pins
+const uint8_t DotDataPin = 14;  
+
+#define colorSaturation 128
+#define MAX_ITER 2000000
+#define IMPULS 400 //400 ms impuls minimal
+// for software bit bang
+NeoPixelBus<NeoGrbFeature, Neo800KbpsMethod> strip(PixelCount, DotDataPin);
+// for hardware SPI (best performance but must use hardware pins)
+//NeoPixelBus<DotStarBgrFeature, DotStarSpiMethod> strip(PixelCount);
+
+// DotStars that support RGB color and a overall luminance/brightness value
+// NeoPixelBus<DotStarLbgrFeature, DotStarMethod> strip(PixelCount, DotClockPin, DotDataPin);
+// DotStars that support RGBW color with a seperate white element
+//NeoPixelBus<DotStarWbgrFeature, DotStarMethod> strip(PixelCount, DotClockPin, DotDataPin);
+
+RgbColor red(colorSaturation, 0, 0);
+RgbColor green(0, colorSaturation, 0);
+RgbColor blue(0, 0, colorSaturation);
+RgbColor white(colorSaturation);
+RgbColor black(0);
+
+RgbColor 	Aqua(0,255,255);
+RgbColor  Black(0,0,0);
+RgbColor 	Blue(0,0,255);
+RgbColor	Cream(255,251,240);
+RgbColor  Grey(128,128,128);
+RgbColor 	Fuchsia(255,0,255);
+RgbColor	Green(0,128,0);
+RgbColor	Lime_green(0,255,0);
+RgbColor 	Maroon(128,0,0);
+RgbColor  Navy(0,0,128);
+RgbColor	Olive_green(128,128,0);
+RgbColor 	Purple(255,0,255);
+RgbColor	Red(255,0,0);
+RgbColor 	Silver(192,192,192);
+RgbColor 	Teal(0,128,128);
+RgbColor	White(255,255,255);
+RgbColor rgbArrayL[] = {Aqua, Black, Blue, Cream, Grey, Fuchsia, Green, Lime_green,Maroon,Navy, Olive_green,Purple,Red,Silver,Teal,White};
+// for use with RGB DotStars when using the luminance/brightness global value
+// note that its range is only 0 - 31 (31 is full bright) and 
+// also note that it is not useful for POV displays as it will cause more flicker
+RgbwColor redL(colorSaturation, 0, 0, 31); // use white value to store luminance
+RgbwColor greenL(0, colorSaturation, 0, 31); // use white value to store luminance
+RgbwColor blueL(0, 0, colorSaturation, 31); // use white value to store luminance
+RgbwColor whiteL(255, 255, 255, colorSaturation / 8); // luminance is only 0-31
+
+// Position of snake
+static unsigned int n;
+static RgbColor LEDonColor;
+static RgbColor LEDoffColor;
+
+RgbColor rgbArray[] = {red, blue, green, white};
+
+const byte interruptPin = 17;
+volatile int interruptCounter = 0;
+int numberOfInterrupts = 0;
+
+unsigned long one,zero;
+bool run;
+
+TaskHandle_t Task1;
+
+
+portMUX_TYPE mux = portMUX_INITIALIZER_UNLOCKED;
+
+void LCD_snake()
+{
+  // set the colors
+  Serial.println("Snake:");
+  for (n=0;n<50;n++) {
+    for (int i=0;i < PixelCount;i++) {
+      strip.SetPixelColor(i,rgbArrayL[(i + n) % sizeof(rgbArrayL)]);
+    }
+    strip.Show();
+    delay(250);
+  }
+  strip.ClearTo(black);
+  strip.Show();
+}
+
+void LCD_blink_color()
+{
+  Serial.print("Blink:");
+  if (n % 2)
+    for (int i=0;i < PixelCount;i++) {
+      strip.SetPixelColor(i,LEDonColor);
+  } else {
+    for (int i=0;i < PixelCount;i++) {
+      strip.SetPixelColor(i,LEDoffColor);
+    }
+  }
+  n++;
+  strip.Show();
+}
+
+void beep(void * pvParameters) {
+  for (;;) {
+    if (run) {
+      tone(BUZZER_PIN, NOTE_C4, 500, BUZZER_CHANNEL);
+      noTone(BUZZER_PIN, BUZZER_CHANNEL);
+      tone(BUZZER_PIN, NOTE_D4, 500, BUZZER_CHANNEL);
+      noTone(BUZZER_PIN, BUZZER_CHANNEL);
+      tone(BUZZER_PIN, NOTE_E4, 500, BUZZER_CHANNEL);
+      noTone(BUZZER_PIN, BUZZER_CHANNEL);
+      tone(BUZZER_PIN, NOTE_F4, 500, BUZZER_CHANNEL);
+      noTone(BUZZER_PIN, BUZZER_CHANNEL);
+      tone(BUZZER_PIN, NOTE_G4, 500, BUZZER_CHANNEL);
+      noTone(BUZZER_PIN, BUZZER_CHANNEL);
+      tone(BUZZER_PIN, NOTE_A4, 500, BUZZER_CHANNEL);
+      noTone(BUZZER_PIN, BUZZER_CHANNEL);
+      tone(BUZZER_PIN, NOTE_B4, 500, BUZZER_CHANNEL);
+      noTone(BUZZER_PIN, BUZZER_CHANNEL);
+      run = false;
+    }
+    delay(100);
+  }
+}
+ 
+void IRAM_ATTR handleInterrupt() {
+
+  portENTER_CRITICAL_ISR(&mux);
+
+  if (digitalRead(interruptPin) == HIGH) one = millis();
+  if (digitalRead(interruptPin) == LOW) zero = millis();
+  
+  interruptCounter++;
+  portEXIT_CRITICAL_ISR(&mux);
+}
+
+void setup() {
+ 
+  Serial.begin(115200);
+
+  Serial.println("Initializing strip...");
+  strip.Begin();
+  strip.ClearTo(black);
+  strip.Show();
+
+  one = zero = millis();
+
+  Serial.println("Monitoring interrupts: ");
+  pinMode(interruptPin, INPUT_PULLUP);
+  attachInterrupt(digitalPinToInterrupt(interruptPin), handleInterrupt, CHANGE);
+  
+  xTaskCreatePinnedToCore(
+             beep, /* Task function. */
+             "Task1",   /* name of task. */
+             10000,     /* Stack size of task */
+             NULL,      /* parameter of the task */
+             1,         /* priority of the task */
+             &Task1,    /* Task handle to keep track of created task */
+             0);        /* pin task to core 0 */
+
+}
+
+void loop() {
+
+  if(interruptCounter>0){
+ 
+      portENTER_CRITICAL(&mux);
+      interruptCounter--;
+      portEXIT_CRITICAL(&mux);
+ 
+      numberOfInterrupts++;
+      Serial.print("An interrupt has occurred. Total: ");
+      Serial.println(numberOfInterrupts);
+      
+      if (zero > one && zero - one > IMPULS) run = true;
+      else run = false;
+      
+      if (run) LCD_snake();
+      
+  }
+  delay(100);
+}

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