From 12e415f1594852437f30feb23060d8b551534537 Mon Sep 17 00:00:00 2001
From: Quentin Bolsee <quentinbolsee@hotmail.com>
Date: Fri, 31 May 2024 04:13:55 -0700
Subject: [PATCH] code
---
code/rp2040_midi_glass/rp2040_midi_glass.ino | 132 +++++++++++++++++++
1 file changed, 132 insertions(+)
create mode 100644 code/rp2040_midi_glass/rp2040_midi_glass.ino
diff --git a/code/rp2040_midi_glass/rp2040_midi_glass.ino b/code/rp2040_midi_glass/rp2040_midi_glass.ino
new file mode 100644
index 0000000..016204b
--- /dev/null
+++ b/code/rp2040_midi_glass/rp2040_midi_glass.ino
@@ -0,0 +1,132 @@
+#include <Adafruit_NeoPixel.h>
+
+#define digitalWriteFast(pin,val) (val ? sio_hw->gpio_set = (1 << pin) : sio_hw->gpio_clr = (1 << pin))
+#define digitalReadFast(pin) ((1 << pin) & sio_hw->gpio_in)
+
+#define RX1 26 // receive 1 pin
+#define TX1 28 // transmit 1 pin
+#define TX2 29 // transmit 2 pin
+#define TX3 6 // transmit 3 pin
+
+#define N_TX 3
+
+#define settle 20 // settle time
+#define samples 100 // number of samples to accumulate
+
+#define USE_MIDI
+
+#ifdef USE_MIDI
+#include <Arduino.h>
+#include <Adafruit_TinyUSB.h>
+#include <MIDI.h>
+#endif
+
+Adafruit_NeoPixel pixels(1, 12, NEO_GRB + NEO_KHZ800);
+int colors[N_TX][3] = {{255, 26, 0}, {0, 255, 0}, {0, 16, 255}};
+
+// MIDI
+#ifdef USE_MIDI
+Adafruit_USBD_MIDI usb_midi;
+MIDI_CREATE_INSTANCE(Adafruit_USBD_MIDI, usb_midi, MIDI);
+int rx_notes[N_TX] = {90, 93, 102};
+#endif
+
+// CAPACITIVE SENSING
+int tx_pins[N_TX] = {TX1, TX2, TX3};
+int32_t rx_values[N_TX];
+int32_t rx_thresholds[N_TX] = {150, 190, 190};
+bool rx_triggered[N_TX];
+
+void setup() {
+ pixels.begin();
+ Serial.begin(0);
+
+ pinMode(11, OUTPUT);
+ digitalWrite(11, HIGH);
+
+ for (int i = 0; i < N_TX; i++) {
+ rx_triggered[N_TX] = false;
+ }
+
+ #ifdef USE_MIDI
+ TinyUSB_Device_Init(0);
+ MIDI.begin(MIDI_CHANNEL_OMNI);
+ while( !TinyUSBDevice.mounted() ) delay(1);
+ #endif
+}
+
+void loop() {
+
+}
+
+void setup1() {
+
+}
+
+int32_t measure(int pin) {
+ int32_t up, down;
+ up = down = 0;
+ pinMode(pin, OUTPUT);
+ for (int i = 0; i < samples; ++i) {
+ digitalWriteFast(pin, HIGH); // charge up
+ up += analogRead(RX1); // read
+ delayMicroseconds(settle); //settle
+ digitalWriteFast(pin,LOW); // charge down
+ down += analogRead(RX1); // read
+ delayMicroseconds(settle); // settle
+ }
+ pinMode(pin, INPUT);
+ return (up-down) / samples;
+}
+
+bool any = false;
+
+void loop1() {
+ for (int i = 0; i < N_TX; i++) {
+ rx_values[i] = measure(tx_pins[i]);
+ if (rx_triggered[i]) {
+ if (rx_values[i] < rx_thresholds[i]) {
+ rx_triggered[i] = false;
+ #ifdef USE_MIDI
+ MIDI.sendNoteOff(64, 0, 1+i);
+ #endif
+ }
+ } else {
+ if (rx_values[i] > rx_thresholds[i]) {
+ rx_triggered[i] = true;
+ #ifdef USE_MIDI
+ MIDI.sendNoteOn(64, 127, 1+i);
+ #endif
+ }
+ }
+ }
+
+ bool any_now = false;
+
+ for (int i = 0; i < N_TX; i++) {
+ Serial.print(rx_values[i]);
+ Serial.print(" ");
+ any_now |= rx_triggered[i];
+ }
+ Serial.println("");
+
+ // neopixel
+ if (any_now && !any) {
+ for (int i = 0; i < N_TX; i++) {
+ if (rx_triggered[i]) {
+ pixels.clear();
+ pixels.setPixelColor(0, pixels.Color(colors[i][0], colors[i][1], colors[i][2]));
+ pixels.show();
+ break;
+ }
+ }
+ }
+ if (!any_now && any) {
+ pixels.clear();
+ pixels.setPixelColor(0, pixels.Color(0, 0, 0));
+ pixels.show();
+ }
+
+ // update
+ any = any_now;
+}
--
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