SD card working, simple config for edge led color added

.gitignore

@@ -0,0 +1 @@
+build

README.md

@@ -0,0 +1,24 @@
+# Soundcube Firmware
+
+## Install new firmware
+
+1. Go to [Releases](https://code.w4d.dev/W4D/soundcube-firmware/releases)
+2. Download latest `soundcube-firmware.ino.uf2` file
+3. On your Soundcube Board: Press and hold the outer most white button as seen from the USB-C socket
+4. While holding the button press the inner most white button once
+	- the board will go into bootloader mode and appear as USB thumb drive
+6. Copy the `soundcube-firmware.ino.uf2` file to the thumb drive and wait for the board to restart
+
+## Code something yourself
+
+1. Download [Arduino IDE](https://www.arduino.cc/en/software/)
+2. Install and open "Preferences"
+3. Follow these [instructions](https://github.com/earlephilhower/arduino-pico?tab=readme-ov-file#installation)
+	- No need to change checkboxes, only paste the URL and hit OK.
+4. Install **Raspberry Pi Pico** boards ([HowTo install boards](https://support.arduino.cc/hc/en-us/articles/360016119519-Add-boards-to-Arduino-IDE))
+5. Install libraries ([HowTo install libraries](https://docs.arduino.cc/software/ide-v2/tutorials/ide-v2-installing-a-library/)): Adafruit Neopixel, AS5600 (Rob Tillaart), TCA9555 (Rob Tillaart)
+6. Choose **Generic RP2350** as board and the correct port (Mac: /dev/cu.usbmodemXXXX, PC: COMXX Serial Port)
+7. Go to **Tools -> Flash Size** and choose **16MB (no FS)**
+8. Make your changes in the code
+9. Hit Upload Button (Arduino IDE compiles and uploads it automatically)
+

soundcube-firmware/soundcube-firmware.ino

@@ -1,11 +1,16 @@
+#include <ArduinoJson.h>
+#include <ArduinoJson.hpp>
+
 #include <TCA9555.h>
 #include <AS5600.h>
 #include <Adafruit_NeoPixel.h>
 #include <PWMAudio.h>
 #include <I2S.h>
+#include <SPI.h>
+#include <SD.h>
 
-#define HAPTIC 0
-#define AURAL 0
+#define HAPTIC 1
+#define AURAL 1
 #define UI_SAMPLERATE 22050
 
 I2S i2s(INPUT_PULLUP);
@@ -17,8 +22,8 @@ PWMAudio ui_snd(8);
 
 enum BUTTON {CVINL, CVINR, INL, INR, OUTR, OUTL, CVOUTR, CVOUTL, RIGHT, LEFT, SELECT, DEBUG1, DEBUG2, DEBUG3};
 
-Adafruit_NeoPixel edge_pixels(8, 4, NEO_GRB + NEO_KHZ800);
-Adafruit_NeoPixel ui_pixels(72, 5, NEO_GRB + NEO_KHZ800);
+Adafruit_NeoPixel edge_pixels(11, 4, NEO_GRB + NEO_KHZ800);
+Adafruit_NeoPixel ui_pixels(74, 5, NEO_GRB + NEO_KHZ800);
 
 volatile bool flag = false;
 volatile bool click = false;
@@ -29,16 +34,48 @@ int counter = 0;
 bool buttons[16] = {false};
 
 int16_t beep[UI_SAMPLERATE];
+uint16_t beep_length = 0;
+
+bool sd_card_detected = false;
+
+struct Config {
+  int edge_color_r = 0;
+  int edge_color_g = 0;
+  int edge_color_b = 50;
+};
+
+Config config;
+
+void loadConfiguration(Config& config) {
+  File file = SD.open("/config.txt");
+  JsonDocument doc;
+
+  DeserializationError error = deserializeJson(doc, file);
+  if(error) Serial.println(F("Failed to read file, using default configuration"));
+
+  config.edge_color_r = doc["edge"]["color"]["r"] | 0;
+  config.edge_color_g = doc["edge"]["color"]["g"] | 0;
+  config.edge_color_b = doc["edge"]["color"]["b"] | 50;
+  
+  //strlcpy(config.hostname, doc["hostname"] | "example.com", sizeof(config.hostname));
+
+  file.close();
+}
 
 void pwm_audio_callback() {
     while (ui_snd.availableForWrite()) {
       if(click) {
         ui_snd.write(beep[counter]);
+        counter++;
+        if(counter == beep_length) {
+          counter = 0;
+          click = false;
+        }
       } else {
+        digitalWriteFast(7, LOW);
         ui_snd.write(0);
+        counter = 0;
       }
-      counter++;
-      if(counter == UI_SAMPLERATE) counter = 0;
     }
 }
 
@@ -47,14 +84,45 @@ void tca_irq() {
 }
 
 void setup() {
-
-  for(int i = 0; i < UI_SAMPLERATE; i++){
-    float sine_pos = (2.0f * M_PI * 8000.0f * (float)i) / (float)UI_SAMPLERATE;
-    beep[i] = (int16_t)(sin(sine_pos) * 8000.0f);
+  Serial.begin();
+  while (!Serial) {
+    ;
   }
 
-  Serial.begin();
-  delay(2000);
+  pinMode(21, INPUT_PULLUP);
+  sd_card_detected = !digitalRead(21);
+  delay(500);
+
+  bool sdInitialized = SD.begin(22, 23, 24);
+  delay(100);
+  if(!sdInitialized) sdInitialized = SD.begin(22, 23, 24); // hack to prevent SD card from not initializing after soft reset
+
+  if(sdInitialized) loadConfiguration(config);
+
+  if(sdInitialized && SD.exists("/click.wav")) {
+    File click = SD.open("/click.wav");
+    int click_bytes = 0;
+    int32_t maxv = 0;
+    while (click.available() || click_bytes == UI_SAMPLERATE-1) {
+      int32_t sample = click.read() * 64;
+      if(abs(sample) > maxv) maxv = sample;
+      beep[click_bytes] = sample;
+      click_bytes++;
+    }
+    
+    beep_length = click_bytes;
+    Serial.print("Read ");
+    Serial.print(beep_length);
+    Serial.print(" bytes from click.wav into beep array. maxV was ");
+    Serial.println(maxv);
+  } else {
+    for(int i = 0; i < UI_SAMPLERATE; i++){
+      float sine_pos = (2.0f * M_PI * 8000.0f * (float)i) / (float)UI_SAMPLERATE;
+      beep[i] = (int16_t)(sin(sine_pos) * 8000.0f);
+    }
+    Serial.println("Synthesized 8kHz sine into beep array.");
+    beep_length = UI_SAMPLERATE;
+  }
 
   Serial.println("INIT WIRE");
   Wire1.setSDA(2);
@@ -74,7 +142,8 @@ void setup() {
   Serial.println("SUCCESS");
 
   // Rotary Encoder
-  ENC.begin(4);  //  set direction pin.
+  ENC.begin();  //  set direction pin.
+  ENC.setDirection(AS5600_COUNTERCLOCK_WISE);
 
   pinMode(6, OUTPUT);  // Vibration Motor
   pinMode(7, OUTPUT);  // UI Amp Enable
@@ -104,6 +173,8 @@ void setup() {
   // }
 }
 int active = 0;
+int active_led_ring = 0;
+
 uint32_t lastTime = 0;
 int32_t position = 0;
 
@@ -111,6 +182,10 @@ void loop() {
   edge_pixels.clear();  // Set all pixel colors to 'off'
   ui_pixels.clear();    // Set all pixel colors to 'off'
   
+  sd_card_detected = !digitalRead(21);
+  if(sd_card_detected) edge_pixels.setPixelColor(8, edge_pixels.Color(0,25,0));
+  if(!sd_card_detected) edge_pixels.setPixelColor(8, edge_pixels.Color(25,0,0));
+
   position = ENC.getCumulativePosition();
 
   // if (millis() - lastTime >= 100)
@@ -121,10 +196,12 @@ void loop() {
   //   Serial.println(ENC.getRevolutions());
   // }
 
+  // LED Ring leeren
   for (int i = 0; i < 48; i++) {
     ui_pixels.setPixelColor(i + 3, edge_pixels.Color(0, 0, 0));
   }
 
+  // flag = true when a button is pushed
   if (flag) {
     int val = TCA.read16();
     Serial.println(val, BIN);
@@ -140,30 +217,30 @@ void loop() {
     if (HAPTIC) {
       digitalWrite(6, HIGH);
     }
+    // Make beep
     if (AURAL) {
-      digitalWrite(7, HIGH);
+      digitalWriteFast(7, HIGH);
       click = true;
-      delay(50);
-      click = false;
-      digitalWrite(7, LOW);
     }
+    // Make vibration
     if(HAPTIC){
       if(!AURAL) delay(50);
       digitalWrite(6, LOW);
     }
+    // Flash led ring 
     for (int i = 0; i < 48; i++) {
         ui_pixels.setPixelColor(i + 3, edge_pixels.Color(0, 15, 0));
     }
+    // Switch through LED matrix
     if(buttons[RIGHT]) active++;
     if(buttons[LEFT]) active--;
     if(active == 13) active = 0;
     if(active == -1) active = 12;
   }
-  // 11111110 11111111 button right
 
   // EDGE LEDs
   for (int i = 0; i < 8; i++) {
-    edge_pixels.setPixelColor(i, edge_pixels.Color(15, 15, 15));
+    edge_pixels.setPixelColor(i, edge_pixels.Color(config.edge_color_r, config.edge_color_g, config.edge_color_b));
   }
 
   // Rotary button LEDs
@@ -171,16 +248,22 @@ void loop() {
   ui_pixels.setPixelColor(1, edge_pixels.Color(0, 0, 15));
   ui_pixels.setPixelColor(2, edge_pixels.Color(0, 0, 15));
 
+  // empty LED matrix
   for (int i = 0; i < 13; i++) {
     ui_pixels.setPixelColor(i + 3 + 48 + 4, edge_pixels.Color(0, 0, 0));
   }
   
+  // set active LED matrix LED
   ui_pixels.setPixelColor(active + 3 + 48 + 4, edge_pixels.Color(255, 255, 255));
 
-  // put your main code here, to run repeatedly:
+  if(position < 0) position += 4096;
+  active_led_ring = (position / 32) % 48;
   
-  edge_pixels.show();  // Set all pixel colors to 'off'
-  ui_pixels.show();    // Set all pixel colors to 'off'
+  // set active LED ring LED
+  ui_pixels.setPixelColor(active_led_ring + 3, edge_pixels.Color(255, 255, 255));
 
-  delay(1);
+  edge_pixels.show();
+  ui_pixels.show();
+
+  delay(1); // wait 1ms
 }