pcb routing ready

FW/Leo_muziekdoos_fw/.gitignore

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

FW/Leo_muziekdoos_fw/.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"
+    ]
+}

FW/Leo_muziekdoos_fw/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

FW/Leo_muziekdoos_fw/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

FW/Leo_muziekdoos_fw/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:genericSTM32F411CE]
+platform = ststm32
+board = genericSTM32F411CE
+framework = arduino
+upload_protocol = stlink
+debug_tool = stlink
+lib_deps = 
+	; stm32duino/STM32duino STM32SD@^1.2.3
+	; adafruit/Audio - Adafruit Fork@^1.3.1
+	adafruit/Adafruit Zero I2S Library@^1.2.1
+build_flags = 
+	-D PIO_FRAMEWORK_ARDUINO_ENABLE_CDC
+	-D PIO_FRAMEWORK_ARDUINO_USB_FULLSPEED_FULLMODE

FW/Leo_muziekdoos_fw/src/main.cpp

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+// Arduino Zero / Feather M0 I2S audio tone generation example.
+// Author: Tony DiCola
+//
+// Connect an I2S DAC or amp (like the UDA1334A) to the Arduino Zero
+// and play back simple sine, sawtooth, triangle, and square waves.
+// Makes your Zero sound like a NES!
+//
+// NOTE: The I2S signal generated by the Zero does NOT have a MCLK /
+// master clock signal.  You must use an I2S receiver that can operate
+// without a MCLK signal (like the UDA1334A).
+//
+// For an Arduino Zero / Feather M0 connect it to you I2S hardware as follows:
+// - Digital 0 -> I2S LRCLK / FS (left/right / frame select clock)
+// - Digital 1 -> I2S BCLK / SCLK (bit / serial clock)
+// - Digital 9 -> I2S DIN / SD (data output)
+// - Ground
+//
+// Released under a MIT license: https://opensource.org/licenses/MIT
+#include "Adafruit_ZeroI2S.h"
+
+
+#define SAMPLERATE_HZ 44100  // The sample rate of the audio.  Higher sample rates have better fidelity,
+                             // but these tones are so simple it won't make a difference.  44.1khz is
+                             // standard CD quality sound.
+
+#define AMPLITUDE     ((1<<29)-1)   // Set the amplitude of generated waveforms.  This controls how loud
+                             // the signals are, and can be any value from 0 to 2**31 - 1.  Start with
+                             // a low value to prevent damaging speakers!
+
+#define WAV_SIZE      256    // The size of each generated waveform.  The larger the size the higher
+                             // quality the signal.  A size of 256 is more than enough for these simple
+                             // waveforms.
+
+
+// Define the frequency of music notes (from http://www.phy.mtu.edu/~suits/notefreqs.html):
+#define C4_HZ      261.63
+#define D4_HZ      293.66
+#define E4_HZ      329.63
+#define F4_HZ      349.23
+#define G4_HZ      392.00
+#define A4_HZ      440.00
+#define B4_HZ      493.88
+
+// Define a C-major scale to play all the notes up and down.
+float scale[] = { C4_HZ, D4_HZ, E4_HZ, F4_HZ, G4_HZ, A4_HZ, B4_HZ, A4_HZ, G4_HZ, F4_HZ, E4_HZ, D4_HZ, C4_HZ };
+
+// Store basic waveforms in memory.
+int32_t sine[WAV_SIZE]     = {0};
+int32_t sawtooth[WAV_SIZE] = {0};
+int32_t triangle[WAV_SIZE] = {0};
+int32_t square[WAV_SIZE]   = {0};
+
+// Create I2S audio transmitter object.
+Adafruit_ZeroI2S i2s;
+
+#define Serial Serial
+
+void generateSine(int32_t amplitude, int32_t* buffer, uint16_t length) {
+  // Generate a sine wave signal with the provided amplitude and store it in
+  // the provided buffer of size length.
+  for (int i=0; i<length; ++i) {
+    buffer[i] = int32_t(float(amplitude)*sin(2.0*PI*(1.0/length)*i));
+  }
+}
+void generateSawtooth(int32_t amplitude, int32_t* buffer, uint16_t length) {
+  // Generate a sawtooth signal that goes from -amplitude/2 to amplitude/2
+  // and store it in the provided buffer of size length.
+  float delta = float(amplitude)/float(length);
+  for (int i=0; i<length; ++i) {
+    buffer[i] = -(amplitude/2)+delta*i;
+  }
+}
+
+void generateTriangle(int32_t amplitude, int32_t* buffer, uint16_t length) {
+  // Generate a triangle wave signal with the provided amplitude and store it in
+  // the provided buffer of size length.
+  float delta = float(amplitude)/float(length);
+  for (int i=0; i<length/2; ++i) {
+    buffer[i] = -(amplitude/2)+delta*i;
+  }
+    for (int i=length/2; i<length; ++i) {
+    buffer[i] = (amplitude/2)-delta*(i-length/2);
+  }
+}
+
+void generateSquare(int32_t amplitude, int32_t* buffer, uint16_t length) {
+  // Generate a square wave signal with the provided amplitude and store it in
+  // the provided buffer of size length.
+  for (int i=0; i<length/2; ++i) {
+    buffer[i] = -(amplitude/2);
+  }
+    for (int i=length/2; i<length; ++i) {
+    buffer[i] = (amplitude/2);
+  }
+}
+
+void playWave(int32_t* buffer, uint16_t length, float frequency, float seconds) {
+  // Play back the provided waveform buffer for the specified
+  // amount of seconds.
+  // First calculate how many samples need to play back to run
+  // for the desired amount of seconds.
+  uint32_t iterations = seconds*SAMPLERATE_HZ;
+  // Then calculate the 'speed' at which we move through the wave
+  // buffer based on the frequency of the tone being played.
+  float delta = (frequency*length)/float(SAMPLERATE_HZ);
+  // Now loop through all the samples and play them, calculating the
+  // position within the wave buffer for each moment in time.
+  for (uint32_t i=0; i<iterations; ++i) {
+    uint16_t pos = uint32_t(i*delta) % length;
+    int32_t sample = buffer[pos];
+    // Duplicate the sample so it's sent to both the left and right channel.
+    // It appears the order is right channel, left channel if you want to write
+    // stereo sound.
+    i2s.write(sample, sample);
+  }
+}
+
+void setup() {
+  // Configure serial port.
+  Serial.begin(115200);
+  Serial.println("Zero I2S Audio Tone Generator");
+
+  // Initialize the I2S transmitter.
+  if (!i2s.begin(I2S_32_BIT, SAMPLERATE_HZ)) {
+    Serial.println("Failed to initialize I2S transmitter!");
+    while (1);
+  }
+  i2s.enableTx();
+
+  // Generate waveforms.
+  generateSine(AMPLITUDE, sine, WAV_SIZE);
+  generateSawtooth(AMPLITUDE, sawtooth, WAV_SIZE);
+  generateTriangle(AMPLITUDE, triangle, WAV_SIZE);
+  generateSquare(AMPLITUDE, square, WAV_SIZE);
+}
+
+void loop() {
+  Serial.println("Sine wave");
+  for (int i=0; i<sizeof(scale)/sizeof(float); ++i) {
+    // Play the note for a quarter of a second.
+    playWave(sine, WAV_SIZE, scale[i], 0.25);
+    // Pause for a tenth of a second between notes.
+    delay(100);
+  }
+  Serial.println("Sawtooth wave");
+  for (int i=0; i<sizeof(scale)/sizeof(float); ++i) {
+    // Play the note for a quarter of a second.
+    playWave(sawtooth, WAV_SIZE, scale[i], 0.25);
+    // Pause for a tenth of a second between notes.
+    delay(100);
+  }
+  Serial.println("Triangle wave");
+  for (int i=0; i<sizeof(scale)/sizeof(float); ++i) {
+    // Play the note for a quarter of a second.
+    playWave(triangle, WAV_SIZE, scale[i], 0.25);
+    // Pause for a tenth of a second between notes.
+    delay(100);
+  }
+  Serial.println("Square wave");
+  for (int i=0; i<sizeof(scale)/sizeof(float); ++i) {
+    // Play the note for a quarter of a second.
+    playWave(square, WAV_SIZE, scale[i], 0.25);
+    // Pause for a tenth of a second between notes.
+    delay(100);
+  }
+}

FW/Leo_muziekdoos_fw/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