App sync code, handles button presses from mixer and syncs changes from VM. Included python code from the mixer. Some other PCB changes, but still needs improvements

ControlMixer/ControlMixer.kicad_sch

@@ -4147,6 +4147,28 @@
 			)
 		)
 	)
+	(global_label "MCP_CS"
+		(shape input)
+		(at 245.11 138.43 0)
+		(fields_autoplaced yes)
+		(effects
+			(font
+				(size 1.27 1.27)
+			)
+			(justify left)
+		)
+		(uuid "110d57d2-9a85-4aeb-9b6a-69c907ecb067")
+		(property "Intersheetrefs" "${INTERSHEET_REFS}"
+			(at 255.5337 138.43 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify left)
+				(hide yes)
+			)
+		)
+	)
 	(global_label "Pot3"
 		(shape input)
 		(at 245.11 120.65 0)
@@ -4213,6 +4235,28 @@
 			)
 		)
 	)
+	(global_label "MCP_CS"
+		(shape input)
+		(at 127 124.46 180)
+		(fields_autoplaced yes)
+		(effects
+			(font
+				(size 1.27 1.27)
+			)
+			(justify right)
+		)
+		(uuid "18abe3ae-619d-4ea9-a26d-baf9ec2f3ec9")
+		(property "Intersheetrefs" "${INTERSHEET_REFS}"
+			(at 116.5763 124.46 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify right)
+				(hide yes)
+			)
+		)
+	)
 	(global_label "Pot4"
 		(shape input)
 		(at 245.11 123.19 0)
@@ -4675,28 +4719,6 @@
 			)
 		)
 	)
-	(global_label "Gnd"
-		(shape input)
-		(at 127 124.46 180)
-		(fields_autoplaced yes)
-		(effects
-			(font
-				(size 1.27 1.27)
-			)
-			(justify right)
-		)
-		(uuid "47bd9f65-0e2a-4fc6-bd4e-d5f3d0725d71")
-		(property "Intersheetrefs" "${INTERSHEET_REFS}"
-			(at 120.4468 124.46 0)
-			(effects
-				(font
-					(size 1.27 1.27)
-				)
-				(justify right)
-				(hide yes)
-			)
-		)
-	)
 	(global_label "USB_5v"
 		(shape input)
 		(at 214.63 138.43 180)
@@ -4895,6 +4917,28 @@
 			)
 		)
 	)
+	(global_label "MCP_CS"
+		(shape input)
+		(at 127 167.64 180)
+		(fields_autoplaced yes)
+		(effects
+			(font
+				(size 1.27 1.27)
+			)
+			(justify right)
+		)
+		(uuid "60a88f2d-666a-4237-80f4-f94f107c2781")
+		(property "Intersheetrefs" "${INTERSHEET_REFS}"
+			(at 116.5763 167.64 0)
+			(effects
+				(font
+					(size 1.27 1.27)
+				)
+				(justify right)
+				(hide yes)
+			)
+		)
+	)
 	(global_label "Ch1Zero"
 		(shape input)
 		(at 214.63 133.35 180)
@@ -5665,28 +5709,6 @@
 			)
 		)
 	)
-	(global_label "Gnd"
-		(shape input)
-		(at 127 167.64 180)
-		(fields_autoplaced yes)
-		(effects
-			(font
-				(size 1.27 1.27)
-			)
-			(justify right)
-		)
-		(uuid "c18809a2-710c-49cd-8166-9b76e2516110")
-		(property "Intersheetrefs" "${INTERSHEET_REFS}"
-			(at 120.4468 167.64 0)
-			(effects
-				(font
-					(size 1.27 1.27)
-				)
-				(justify right)
-				(hide yes)
-			)
-		)
-	)
 	(global_label "3v3"
 		(shape input)
 		(at 135.89 22.86 180)
@@ -8261,10 +8283,10 @@
 			)
 		)
 		(pin "2"
-			(uuid "266096b0-0722-468b-b667-02afdd8ba748")
+			(uuid "266096b0-0722-468b-b667-02afdd8ba749")
 		)
 		(pin "1"
-			(uuid "a9d6408d-fc4c-4df3-b784-212408267add")
+			(uuid "a9d6408d-fc4c-4df3-b784-212408267ade")
 		)
 		(instances
 			(project "ControlMixer"

ControlMixerPython/boot.py

@@ -0,0 +1,12 @@
+import board
+import digitalio
+import usb_mixer
+recovery_pin = digitalio.DigitalInOut(board.D3)
+recovery_pin.direction = digitalio.Direction.INPUT
+recovery_pin.pull = digitalio.Pull.UP
+
+if recovery_pin.value == True:
+    print("Booting normal mode")
+    usb_mixer.initUsb()
+else:
+    print("Booting recovery mode")

ControlMixerPython/boot_out.txt

@@ -0,0 +1,5 @@
+Adafruit CircuitPython 9.0.4 on 2024-04-16; Adafruit ItsyBitsy M4 Express with samd51g19
+Board ID:itsybitsy_m4_express
+UID:A9C26FCF53324853202020472A3908FF
+boot.py output:
+Booting normal mode

ControlMixerPython/code.py

@@ -0,0 +1,63 @@
+import usb_mixer
+import board
+import adafruit_dotstar
+import analogio
+import time
+import math
+import ulab.numpy
+import supervisor
+import key_interface
+import storage
+
+ANALOG_SAMPLE_SIZE=150
+
+pixel = adafruit_dotstar.DotStar(board.DOTSTAR_CLOCK, board.DOTSTAR_DATA, 1)
+slider_in = [
+    analogio.AnalogIn(board.A0),
+    analogio.AnalogIn(board.A1),
+    analogio.AnalogIn(board.A2),
+    analogio.AnalogIn(board.A3),
+    analogio.AnalogIn(board.A4)
+]
+
+i2c = board.I2C()
+keys = key_interface.KeyInterface(i2c)
+
+slider_vals = [0,0,0,0,0]
+buttons = [0,0,0,0,0]
+
+def readSlider(num):
+    vals = []
+    for i in range(0, ANALOG_SAMPLE_SIZE):
+        vals.append((slider_in[num].value / 0xFFFF) * 0xFFF) # Scale analogio back to ADC resolution
+    val_median = ulab.numpy.mean(ulab.numpy.ndarray(vals))
+    return math.floor((val_median / 0xFFF) * usb_mixer.RESOLUTION)
+
+try:
+    pixel.fill((0,0,32))
+    while not supervisor.runtime.usb_connected:
+        time.sleep(0.5)
+
+    mixer = usb_mixer.UsbMixer()
+    pixel.fill((0,32,0))
+    while True:
+        new_values = [
+            readSlider(0),
+            readSlider(1),
+            readSlider(2),
+            readSlider(3),
+            readSlider(4)
+        ]
+        new_buttons = keys.scan()
+        if new_values != slider_vals or new_buttons != buttons:
+            mixer.send_values(new_values[0], new_values[1], new_values[2], new_values[3], new_values[4], new_buttons)
+            pixel.fill((32,32,32))
+            slider_vals = new_values
+            buttons = new_buttons
+            pixel.fill((0,32,0))
+        time.sleep(0.001)
+except Exception as ex:
+    pixel.fill((255,0,0))
+    with open("/runtime_ex.txt", "w") as fp:
+        fp.write(ex)
+    print(ex)

ControlMixerPython/key_interface.py

@@ -0,0 +1,40 @@
+import board
+import busio
+import digitalio
+from adafruit_mcp230xx.mcp23017 import MCP23017
+
+class KeyInterface:
+    _MCP23017_OLATA = 0x14
+    _MCP23017_OLATB = 0x15
+    
+    def set_olata(self, val: int):
+        self.mcp._write_u8(self._MCP23017_OLATA, val)
+    
+    def set_olatb(self, val: int):
+        self.mcp._write_u8(self._MCP23017_OLATB, val)
+    
+    def __init__(self, i2c):
+        self._i2c = i2c
+        
+        # Turn on MCP
+        self._mcp_reset_pin = digitalio.DigitalInOut(board.D4)
+        self._mcp_reset_pin.direction = digitalio.Direction.OUTPUT
+        self._mcp_reset_pin.value = True
+        
+        # Initialize MCP
+        self.mcp = MCP23017(self._i2c)
+        
+        # Set up MCP pins
+        self.mcp.iodirb = 255  # GPIO B (rows) all input
+        self.mcp.ipolb = 255   # GPIO B inverted polarity
+        self.mcp.gppub = 255   # GPIO B all pulled up
+        self.set_olata(0) # GPIO A all output low
+        
+    def scan(self):
+        result = []
+        for i in range(0, 6):
+            self.mcp.iodira = 0xFF ^ (0x01 << i)
+            result.append(self.mcp.gpiob)
+        self.mcp.iodira = 0xFF
+        return result
+        

ControlMixerPython/sd/placeholder.txt

@@ -0,0 +1 @@
+SD cards mounted at /sd will hide this file from Python. SD cards are not visible via USB CIRCUITPY.

ControlMixerPython/usb_mixer.py

@@ -0,0 +1,86 @@
+import usb_hid
+import supervisor
+import storage
+import usb_midi
+
+DEFAULT_REPORT_ID = 1
+HANDSHAKE_REPORT_ID = 2
+VENDOR_ID = 0x0359
+PRODUCT_ID = 0x6497           # T9 MIXR
+
+RESOLUTION = 100               # Voicemeeter sliders go from 12.0 to -60.0 in 0.1 increments
+
+REPORT_DESCRIPTOR = bytes([
+    0x05, 0x01,               # Usage Page (Generic Desktop Controls)
+    0x09, 0x08,               # Usage (Multi-Axis Controller)
+    #0x09, 0x04, # Joystick usage (for windows to pick up as usb controller)
+    0xA1, 0x01,               # Collection (Application)
+    # BUTTONS
+    0x05, 0x09,               # Usage Page (Button)
+    0x19, 0x01,               # Usage Minimum (Button 1)
+    0x29, 0x30,               # Usage Maximum (Button 48)
+    0x15, 0x00,               # Logical Minimum (0)
+    0x25, 0x01,               # Logical Maximum (1)
+    0x75, 0x01,               # Report Size (1 bit)
+    0x95, 0x30,               # Report Count (48)
+    0x81, 0x02,               # Input (Data, Variable, Absolute)
+    # SLIDERS
+    0x15, 0x00,               # Logical Minimum (0)
+    0x26, 0xFF, 0xFF,         # Logical Maximum (RESOLUTION (720))
+    0x75, 0x10,               # Report Size (16-bit)
+    #0x85, DEFAULT_REPORT_ID,  # Report ID (DEFAULT_REPORT_ID)
+    0x95, 0x05,               # Report Count (5)
+    0x09, 0x30,               # Usage (X)
+    0x09, 0x31,               # Usage (Y)
+    0x09, 0x32,               # Usage (Z)
+    0x09, 0x33,               # Usage (Rx)
+    0x09, 0x34,               # Usage (Ry)
+    0x81, 0x00,               # Input (Data, Array, Absolute)
+    0xC0,                     # End Collection
+    #0x05, 0x06,               # Usage Page (Generic Device Controls)
+    #0x09, 0x01,               # Usage (Background/Nonuser controls)
+    #0xA1, 0x01,               # Collection (Application)
+    #0x75, 0x20,               # Report Size (32-bit)
+    #0x95, 0x01,               # Report Count (1)
+    #0x85, HANDSHAKE_REPORT_ID,# Report ID (HANDSHAKE_REPORT_ID)
+    #0x81, 0x01,               # Input (Constant, Array, Absolute)
+    #0xC0,                     # End Collection
+])
+
+def initUsb():
+    if supervisor.runtime.usb_connected:
+        raise RuntimeError("USB cannot be initialized post-boot")
+    supervisor.set_usb_identification(manufacturer="TechAbsol", product="USB Mixer", vid=VENDOR_ID, pid=PRODUCT_ID)
+
+    usb_midi.disable()
+    usb_hid.set_interface_name("CircuitPython Mixer")
+    sliders = usb_hid.Device(
+        report_descriptor = REPORT_DESCRIPTOR,
+        usage_page=0x01,
+        usage=0x08,
+        report_ids=(0,),
+        in_report_lengths=(16,),
+        out_report_lengths=(0,),
+    )
+
+    #storage.disable_usb_drive()
+    #storage.remount("/", False)
+    usb_hid.enable((sliders,))
+    
+class UsbMixer():
+    def __init__(self):
+        if not supervisor.runtime.usb_connected:
+            raise RuntimeError("USB is not connected")
+        self._device = next((dev for dev in usb_hid.devices if dev.usage_page == 0x01 and dev.usage == 0x08))
+        if self._device is None:
+            raise RuntimeError("USB mixer doesn't appear to be initialized")
+
+    def _valToBytes(self, value):
+        return bytes([value & 0xFF, (value >> 8) & 0xFF])
+    
+    def _keysToBytes(self, keys):
+        return bytes([keys[0], keys[1], keys[2], keys[3], keys[4], keys[5]])
+
+    def send_values(self, slider1, slider2, slider3, slider4, slider5, keys):
+        report = self._keysToBytes(keys) + self._valToBytes(slider1) + self._valToBytes(slider2) + self._valToBytes(slider3) + self._valToBytes(slider4) + self._valToBytes(slider5)
+        self._device.send_report(report)

HidSliders.Gui/Form1.Designer.cs

@@ -108,6 +108,7 @@
             mixerAutoConnectCheckbox = new CheckBox();
             mixerLabel = new Label();
             notifyIcon1 = new NotifyIcon(components);
+            listBox1 = new ListBox();
             groupBox1.SuspendLayout();
             ((System.ComponentModel.ISupportInitialize)trackBar1).BeginInit();
             ((System.ComponentModel.ISupportInitialize)trackBar2).BeginInit();
@@ -480,6 +481,7 @@
             checkBox5.TabIndex = 38;
             checkBox5.Text = "B3";
             checkBox5.UseVisualStyleBackColor = true;
+            checkBox5.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox6
             // 
@@ -491,6 +493,7 @@
             checkBox6.TabIndex = 37;
             checkBox6.Text = "B2";
             checkBox6.UseVisualStyleBackColor = true;
+            checkBox6.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox7
             // 
@@ -502,6 +505,7 @@
             checkBox7.TabIndex = 36;
             checkBox7.Text = "B1";
             checkBox7.UseVisualStyleBackColor = true;
+            checkBox7.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox8
             // 
@@ -513,6 +517,7 @@
             checkBox8.TabIndex = 35;
             checkBox8.Text = "A5";
             checkBox8.UseVisualStyleBackColor = true;
+            checkBox8.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox9
             // 
@@ -524,6 +529,7 @@
             checkBox9.TabIndex = 34;
             checkBox9.Text = "A4";
             checkBox9.UseVisualStyleBackColor = true;
+            checkBox9.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox10
             // 
@@ -535,6 +541,7 @@
             checkBox10.TabIndex = 33;
             checkBox10.Text = "A3";
             checkBox10.UseVisualStyleBackColor = true;
+            checkBox10.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox11
             // 
@@ -547,6 +554,7 @@
             checkBox11.Tag = "A2";
             checkBox11.Text = "A2";
             checkBox11.UseVisualStyleBackColor = true;
+            checkBox11.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox12
             // 
@@ -559,6 +567,7 @@
             checkBox12.Tag = "";
             checkBox12.Text = "A1";
             checkBox12.UseVisualStyleBackColor = true;
+            checkBox12.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox13
             // 
@@ -594,6 +603,7 @@
             checkBox15.TabIndex = 48;
             checkBox15.Text = "B3";
             checkBox15.UseVisualStyleBackColor = true;
+            checkBox15.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox16
             // 
@@ -605,6 +615,7 @@
             checkBox16.TabIndex = 47;
             checkBox16.Text = "B2";
             checkBox16.UseVisualStyleBackColor = true;
+            checkBox16.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox17
             // 
@@ -616,6 +627,7 @@
             checkBox17.TabIndex = 46;
             checkBox17.Text = "B1";
             checkBox17.UseVisualStyleBackColor = true;
+            checkBox17.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox18
             // 
@@ -627,6 +639,7 @@
             checkBox18.TabIndex = 45;
             checkBox18.Text = "A5";
             checkBox18.UseVisualStyleBackColor = true;
+            checkBox18.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox19
             // 
@@ -638,6 +651,7 @@
             checkBox19.TabIndex = 44;
             checkBox19.Text = "A4";
             checkBox19.UseVisualStyleBackColor = true;
+            checkBox19.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox20
             // 
@@ -649,6 +663,7 @@
             checkBox20.TabIndex = 43;
             checkBox20.Text = "A3";
             checkBox20.UseVisualStyleBackColor = true;
+            checkBox20.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox21
             // 
@@ -661,6 +676,7 @@
             checkBox21.Tag = "A2";
             checkBox21.Text = "A2";
             checkBox21.UseVisualStyleBackColor = true;
+            checkBox21.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox22
             // 
@@ -673,6 +689,7 @@
             checkBox22.Tag = "";
             checkBox22.Text = "A1";
             checkBox22.UseVisualStyleBackColor = true;
+            checkBox22.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox23
             // 
@@ -708,6 +725,7 @@
             checkBox25.TabIndex = 58;
             checkBox25.Text = "B3";
             checkBox25.UseVisualStyleBackColor = true;
+            checkBox25.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox26
             // 
@@ -719,6 +737,7 @@
             checkBox26.TabIndex = 57;
             checkBox26.Text = "B2";
             checkBox26.UseVisualStyleBackColor = true;
+            checkBox26.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox27
             // 
@@ -730,6 +749,7 @@
             checkBox27.TabIndex = 56;
             checkBox27.Text = "B1";
             checkBox27.UseVisualStyleBackColor = true;
+            checkBox27.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox28
             // 
@@ -741,6 +761,7 @@
             checkBox28.TabIndex = 55;
             checkBox28.Text = "A5";
             checkBox28.UseVisualStyleBackColor = true;
+            checkBox28.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox29
             // 
@@ -752,6 +773,7 @@
             checkBox29.TabIndex = 54;
             checkBox29.Text = "A4";
             checkBox29.UseVisualStyleBackColor = true;
+            checkBox29.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox30
             // 
@@ -763,6 +785,7 @@
             checkBox30.TabIndex = 53;
             checkBox30.Text = "A3";
             checkBox30.UseVisualStyleBackColor = true;
+            checkBox30.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox31
             // 
@@ -775,6 +798,7 @@
             checkBox31.Tag = "A2";
             checkBox31.Text = "A2";
             checkBox31.UseVisualStyleBackColor = true;
+            checkBox31.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox32
             // 
@@ -787,6 +811,7 @@
             checkBox32.Tag = "";
             checkBox32.Text = "A1";
             checkBox32.UseVisualStyleBackColor = true;
+            checkBox32.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox33
             // 
@@ -822,6 +847,7 @@
             checkBox35.TabIndex = 68;
             checkBox35.Text = "B3";
             checkBox35.UseVisualStyleBackColor = true;
+            checkBox35.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox36
             // 
@@ -833,6 +859,7 @@
             checkBox36.TabIndex = 67;
             checkBox36.Text = "B2";
             checkBox36.UseVisualStyleBackColor = true;
+            checkBox36.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox37
             // 
@@ -844,6 +871,7 @@
             checkBox37.TabIndex = 66;
             checkBox37.Text = "B1";
             checkBox37.UseVisualStyleBackColor = true;
+            checkBox37.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox38
             // 
@@ -855,6 +883,7 @@
             checkBox38.TabIndex = 65;
             checkBox38.Text = "A5";
             checkBox38.UseVisualStyleBackColor = true;
+            checkBox38.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox39
             // 
@@ -866,6 +895,7 @@
             checkBox39.TabIndex = 64;
             checkBox39.Text = "A4";
             checkBox39.UseVisualStyleBackColor = true;
+            checkBox39.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox40
             // 
@@ -877,6 +907,7 @@
             checkBox40.TabIndex = 63;
             checkBox40.Text = "A3";
             checkBox40.UseVisualStyleBackColor = true;
+            checkBox40.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox41
             // 
@@ -889,6 +920,7 @@
             checkBox41.Tag = "A2";
             checkBox41.Text = "A2";
             checkBox41.UseVisualStyleBackColor = true;
+            checkBox41.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // checkBox42
             // 
@@ -901,6 +933,7 @@
             checkBox42.Tag = "";
             checkBox42.Text = "A1";
             checkBox42.UseVisualStyleBackColor = true;
+            checkBox42.CheckedChanged += busCheckbox_CheckedChanged;
             // 
             // slider1Label
             // 
@@ -986,11 +1019,21 @@
             notifyIcon1.Visible = true;
             notifyIcon1.Click += notifyIcon1_Click;
             // 
+            // listBox1
+            // 
+            listBox1.FormattingEnabled = true;
+            listBox1.ItemHeight = 15;
+            listBox1.Location = new Point(12, 278);
+            listBox1.Name = "listBox1";
+            listBox1.Size = new Size(200, 64);
+            listBox1.TabIndex = 77;
+            // 
             // Form1
             // 
             AutoScaleDimensions = new SizeF(7F, 15F);
             AutoScaleMode = AutoScaleMode.Font;
             ClientSize = new Size(780, 363);
+            Controls.Add(listBox1);
             Controls.Add(groupBox2);
             Controls.Add(slider5Label);
             Controls.Add(slider4Label);
@@ -1160,5 +1203,6 @@
         private CheckBox mixerAutoConnectCheckbox;
         private Label mixerLabel;
         private NotifyIcon notifyIcon1;
+        private ListBox listBox1;
     }
 }

HidSliders.Gui/Form1.cs

@@ -1,17 +1,21 @@
-using System.Diagnostics;
-using System.Reflection;
-using HidLibrary;
+using HidSliders.Hid;
 using Voicemeeter;
 using VoiceMeeter;
+using Timer = System.Windows.Forms.Timer;
 
 namespace HidSliders.Gui
 {
     public partial class Form1 : Form
     {
         private IDisposable? _vmClient;
-        private IHidDevice? _hidDevice;
-        private const float Resolution = 72.0f;
+        private bool _mixerConnected;
+        private List<MixerButton> _previousButtons = [];
+        private readonly HidInterface _hidInterface;
+        private const int ZeroPercent = 90;
         private readonly List<ChannelControlCollection> _channels;
+        private bool _suppressCheckboxUpdate = false;
+        private Timer _syncTimer = new();
+
         public Form1()
         {
             InitializeComponent();
@@ -44,24 +48,134 @@ namespace HidSliders.Gui
             _channels[3].ChannelSelector.Value = Properties.Settings.Default.Channel4Strip;
             _channels[4].ChannelSelector.Value = Properties.Settings.Default.Channel5Strip;
 
+            _syncTimer.Tick += SyncVM;
+            _syncTimer.Interval = 100;
+            _syncTimer.Enabled = true;
             if (Properties.Settings.Default.AutoConnect)
             {
                 autoConnectCheckBox.Checked = true;
                 Task.Run(ConnectVoicemeeter).Wait();
             }
 
-            var enumerator = new HidEnumerator();
-            var hidDevices = enumerator.Enumerate(0x0359, [0x6497]);
-            _hidDevice = hidDevices.FirstOrDefault();
-            voicemeeterStatusLabel.Text = $"Mixer {(_hidDevice?.IsConnected == true ? "" : "not ")}connected";
+            _hidInterface = new HidInterface();
+            mixerLabel.Text = "Mixer not connected";
 
-            if (_hidDevice?.IsConnected == true && Properties.Settings.Default.MixerAutoConnect)
+            if (Properties.Settings.Default.MixerAutoConnect)
             {
-                UsbListenerLoop();
+                ConnectHidMixer();
                 mixerAutoConnectCheckbox.Checked = true;
             }
         }
 
+        private void OnSliderValues(int[] values)
+        {
+            this.BeginInvoke(() =>
+            {
+                for (int i = 0; i < 5; i++)
+                {
+                    var gain = HidToGain(values[i]);
+                    SetStripGain(_channels[i].CurrentStrip, gain);
+                    _channels[i].TrackBar.Value = (int)gain;
+                    _channels[i].IndicatorLabel.Text = $"{gain} dB";
+                }
+            });
+        }
+
+        private void HandleButtonPress(MixerButton button)
+        {
+            var buttonGroup = MixerButtonHelper.GetButtonGroup(button);
+            var channelButton = MixerButtonHelper.GetChannelButton(button, buttonGroup);
+
+            ChannelControlCollection channel;
+            switch (buttonGroup)
+            {
+                case ButtonGroups.Channel1:
+                    channel = _channels[0];
+                    break;
+                case ButtonGroups.Channel2:
+                    channel = _channels[1];
+                    break;
+                case ButtonGroups.Channel3:
+                    channel = _channels[2];
+                    break;
+                case ButtonGroups.Channel4:
+                    channel = _channels[3];
+                    break;
+                case ButtonGroups.Channel5:
+                    channel = _channels[4];
+                    break;
+                default:
+                    throw new Exception();
+            }
+
+            switch (channelButton)
+            {
+                case ChannelButton.ChannelA1:
+                    channel.BusA1Checkbox.Checked = !channel.BusA1Checkbox.Checked;
+                    break;
+                case ChannelButton.ChannelA2:
+                    channel.BusA2Checkbox.Checked = !channel.BusA2Checkbox.Checked;
+                    break;
+                case ChannelButton.ChannelA3:
+                    channel.BusA3Checkbox.Checked = !channel.BusA3Checkbox.Checked;
+                    break;
+                case ChannelButton.ChannelA4:
+                    channel.BusA4Checkbox.Checked = !channel.BusA4Checkbox.Checked;
+                    break;
+                case ChannelButton.ChannelA5:
+                    channel.BusA5Checkbox.Checked = !channel.BusA5Checkbox.Checked;
+                    break;
+                case ChannelButton.ChannelB1:
+                    channel.BusB1Checkbox.Checked = !channel.BusB1Checkbox.Checked;
+                    break;
+                case ChannelButton.ChannelB2:
+                    channel.BusB2Checkbox.Checked = !channel.BusB2Checkbox.Checked;
+                    break;
+                case ChannelButton.ChannelB3:
+                    channel.BusB3Checkbox.Checked = !channel.BusB3Checkbox.Checked;
+                    break;
+                case ChannelButton.ChannelMute:
+                    channel.MuteCheckBox.Checked = !channel.MuteCheckBox.Checked;
+                    break;
+                default:
+                    throw new Exception();
+            }
+            listBox1.Items.Add($"{buttonGroup} {channelButton} pressed");
+        }
+
+        private void OnButtons(List<MixerButton> buttons)
+        {
+            BeginInvoke(() =>
+            {
+                var newButtons = buttons.Except(_previousButtons).ToList();
+                _previousButtons = buttons;
+
+                newButtons.ForEach(HandleButtonPress);
+            });
+        }
+
+        private void OnSliderComplete()
+        {
+            BeginInvoke(() =>
+            {
+                _mixerConnected = false;
+                button1.Enabled = true;
+                mixerLabel.Text = "Mixer disconnected";
+            });
+        }
+
+        private void ConnectHidMixer()
+        {
+            _mixerConnected = _hidInterface.ConnectDevice(0x0359, 0x6497);
+            if (_mixerConnected)
+            {
+                mixerLabel.Text = "Mixer connected";
+                button1.Enabled = false;
+                _hidInterface.SliderObservable.Subscribe(OnSliderValues, OnSliderComplete);
+                _hidInterface.ButtonsObservable.Subscribe(OnButtons);
+            }
+        }
+
         private async Task ConnectVoicemeeter()
         {
             RunVoicemeeterParam version = RunVoicemeeterParam.None;
@@ -84,6 +198,7 @@ namespace HidSliders.Gui
             {
                 EnableVMControls(version);
                 voicemeeterStatusLabel.Text = "Connected";
+                _syncTimer.Start();
             }
         }
 
@@ -92,6 +207,16 @@ namespace HidSliders.Gui
             await ConnectVoicemeeter();
         }
 
+        private void SyncVM(object? sender, EventArgs eventArgs)
+        {
+            if (_vmClient == null || Remote.IsParametersDirty() != 1) return;
+
+            foreach (var channelControlCollection in _channels)
+            {
+                SyncChannelControls(channelControlCollection);
+            }
+        }
+
         private void EnableVMControls(RunVoicemeeterParam version)
         {
             foreach (var channel in _channels)
@@ -106,6 +231,7 @@ namespace HidSliders.Gui
 
         private void SyncChannelControls(ChannelControlCollection channel)
         {
+            _suppressCheckboxUpdate = true;
             channel.BusA1Checkbox.Checked = GetBusEnabled(channel.CurrentStrip, VMBus.A1);
             channel.BusB1Checkbox.Checked = GetBusEnabled(channel.CurrentStrip, VMBus.B1);
             if (vmBananaRadio.Checked || vmPotatoRadio.Checked)
@@ -125,6 +251,7 @@ namespace HidSliders.Gui
             channel.TrackBar.Value = (int)GetStripGain(channel.CurrentStrip);
             channel.SoloCheckBox.Checked = GetChannelSolo(channel.CurrentStrip);
             channel.MuteCheckBox.Checked = GetChannelMute(channel.CurrentStrip);
+            _suppressCheckboxUpdate = false;
         }
 
         private void Form1_FormClosing(object sender, FormClosingEventArgs e)
@@ -133,44 +260,9 @@ namespace HidSliders.Gui
             Properties.Settings.Default.Save();
         }
 
-        private async void UsbListenerLoop()
-        {
-            if (_hidDevice == null) return;
-            mixerLabel.Text = "Mixer online";
-            while (true)
-            {
-                if (_hidDevice.IsConnected)
-                {
-                    button1.Enabled = false;
-                    //label1.Text = "waiting for report";
-                    var progress = new Progress<string>();
-                    progress.ProgressChanged += (o, s) => voicemeeterStatusLabel.Text = s;
-                    var report = await Task.Run(() => _hidDevice.ReadReport());
-                    if (report.ReadStatus == HidDeviceData.ReadStatus.Success)
-                    {
-                        var reportChunk = new byte[2];
-                        for (int i = 0; i < 5; i++)
-                        {
-                            Array.Copy(report.Data, i * 2, reportChunk, 0, 2);
-                            var sliderVal = BitConverter.ToInt16(reportChunk);
-                            var gain = HidToGain(sliderVal);
-                            SetStripGain(_channels[i].CurrentStrip, gain);
-                            _channels[i].TrackBar.Value = (int)gain;
-                            _channels[i].IndicatorLabel.Text = $"{gain} dB";
-                        }
-                    }
-                    //button1.Enabled = true;
-                }
-                else
-                {
-                    button1.Enabled = true;
-                }
-            }
-        }
-
         private void button1_Click(object sender, EventArgs e)
         {
-            UsbListenerLoop();
+            ConnectHidMixer();
         }
 
         private float HidToGain(int hidValue)
@@ -179,11 +271,43 @@ namespace HidSliders.Gui
             // Truncate to first decimal (move decimal, int truncate, move decimal)
             //var realResult = 5.8456f + 17.0486f * (float)Math.Log(Math.Max(hidValue / Resolution, 0.02));
             //return ((int)(realResult * 10)) / 10.0f;
-            return hidValue - 60;
+            return (int)(CalculateGain(hidValue, ZeroPercent) * 10) / 10.0f;
+        }
+
+        public static float CalculateGain(float slider, int zeroPct)
+        {
+            float minSlider;
+            float maxSlider;
+            float minGain;
+            float maxGain;
+
+            if (slider >= zeroPct)
+            {
+                minSlider = zeroPct;
+                maxSlider = 100;
+                minGain = 0;
+                maxGain = 12;
+            }
+            else
+            {
+                minSlider = 0;
+                maxSlider = zeroPct;
+                minGain = -60;
+                maxGain = 0;
+            }
+
+            // Calculate the percentage of slider position within the range
+            var percentage = (slider - minSlider) / (maxSlider - minSlider);
+
+            // Interpolate gain within the range based on the percentage
+            var calculatedGain = minGain + (percentage * (maxGain - minGain));
+
+            return calculatedGain;
         }
 
         private void trackBar_Scroll(object sender, EventArgs e)
         {
+            if (_suppressCheckboxUpdate) return;
             if (sender is TrackBar trackBar && _vmClient != null)
             {
                 var channel = _channels.First(c => c.OwnsControl(trackBar));
@@ -193,6 +317,7 @@ namespace HidSliders.Gui
 
         private void busCheckbox_CheckedChanged(object sender, EventArgs e)
         {
+            if (_suppressCheckboxUpdate) return;
             if (sender is CheckBox { Tag: VMBus bus } checkBox && _vmClient != null)
             {
                 var channel = _channels.First(c => c.OwnsControl(checkBox));
@@ -243,8 +368,6 @@ namespace HidSliders.Gui
             }
         }
 
-
-
         private void SetBusEnabled(int strip, VMBus bus, bool enabled)
         {
             Remote.SetParameter($"Strip[{strip}].{bus}", enabled ? 1 : 0);
@@ -292,6 +415,7 @@ namespace HidSliders.Gui
 
         private void soloCheckBox_CheckedChanged(object sender, EventArgs e)
         {
+            if (_suppressCheckboxUpdate) return;
             if (sender is CheckBox checkBox && _vmClient != null)
             {
                 var channel = _channels.First(c => c.OwnsControl(checkBox));
@@ -301,6 +425,7 @@ namespace HidSliders.Gui
 
         private void muteCheckBox_CheckedChanged(object sender, EventArgs e)
         {
+            if (_suppressCheckboxUpdate) return;
             if (sender is CheckBox checkBox && _vmClient != null)
             {
                 var channel = _channels.First(c => c.OwnsControl(checkBox));

HidSliders.Gui/HidSliders.Gui.csproj

@@ -9,10 +9,14 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="hidlibrary" Version="3.3.40" />
+    <PackageReference Include="hidlibrary" Version="3.2.49" />
     <PackageReference Include="VoicemeeterRemote" Version="1.0.3" />
   </ItemGroup>
 
+  <ItemGroup>
+    <ProjectReference Include="..\HidSliders.Hid\HidSliders.Hid.csproj" />
+  </ItemGroup>
+
   <ItemGroup>
     <Compile Update="Properties\Settings.Designer.cs">
       <DesignTimeSharedInput>True</DesignTimeSharedInput>

HidSliders.Hid/Class1.cs

@@ -1,7 +0,0 @@
-namespace HidSliders.Hid
-{
-    public class Class1
-    {
-
-    }
-}

HidSliders.Hid/HidInterface.cs

@@ -0,0 +1,87 @@
+using System.Reactive.Subjects;
+using HidLibrary;
+
+namespace HidSliders.Hid
+{
+    public class HidInterface
+    {
+        private IHidDevice? _device;
+        private Subject<int[]> _sliderUpdate = new();
+        private Subject<List<MixerButton>> _buttonsUpdate = new();
+
+        public IObservable<int[]> SliderObservable => _sliderUpdate;
+        public IObservable<List<MixerButton>> ButtonsObservable => _buttonsUpdate;
+
+        public bool ConnectDevice(int vendorId, int devId)
+        {
+            var enumerator = new HidEnumerator();
+            IEnumerable<IHidDevice> hidDevices = enumerator.Enumerate(vendorId, [devId]);
+
+            _device = hidDevices.FirstOrDefault();
+
+            if (_device is { IsConnected: true })
+            {
+                _device.OpenDevice();
+                _device.MonitorDeviceEvents = true;
+
+                _device.ReadReport(OnReport);
+                _device.Removed += DeviceOnRemoved;
+                _device.Inserted += DeviceOnInserted;
+            }
+
+            return _device?.IsConnected ?? false;
+        }
+
+        private void DeviceOnInserted()
+        {
+            _sliderUpdate = new Subject<int[]>();
+            _buttonsUpdate = new Subject<List<MixerButton>>();
+        }
+
+        private void DeviceOnRemoved()
+        {
+            _sliderUpdate.OnCompleted();
+            _buttonsUpdate.OnCompleted();
+        }
+
+        private void ReadSliders(byte[] reportSliderBytes)
+        {
+            var reportChunk = new byte[4];
+            var sliderValues = new int[5];
+            for (int i = 0; i < 5; i++)
+            {
+                Array.Copy(reportSliderBytes, i * 2, reportChunk, 0, 2);
+                sliderValues[i] = BitConverter.ToInt32(reportChunk);
+            }
+            _sliderUpdate.OnNext(sliderValues);
+        }
+
+        private void ReadButtons(byte[] reportButtonBytes)
+        {
+            if (reportButtonBytes.Length != 8)
+            {
+                throw new ArgumentException("incoming report data was not padded to 8 bytes");
+            }
+            var buttonLong = BitConverter.ToInt64(reportButtonBytes);
+            _buttonsUpdate.OnNext(MixerButtonHelper.GetSetFlags(buttonLong));
+        }
+
+        private void ReadReport(byte[] reportBytes)
+        {
+            var buttons = new byte[8];
+            var sliders = new byte[10];
+            Array.Copy(reportBytes, 0, buttons, 0, 6);
+            Array.Copy(reportBytes, 6, sliders, 0, 10);
+            ReadSliders(sliders);
+            ReadButtons(buttons);
+        }
+
+        private void OnReport(HidReport report)
+        {
+            if (!_device!.IsConnected) return;
+
+            ReadReport(report.Data);
+            _device!.ReadReport(OnReport);
+        }
+    }
+}

HidSliders.Hid/HidSliders.Hid.csproj

@@ -7,7 +7,8 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="hidlibrary" Version="3.3.40" />
+    <PackageReference Include="hidlibrary" Version="3.2.49" />
+    <PackageReference Include="System.Reactive" Version="6.0.0" />
   </ItemGroup>
 
 </Project>

HidSliders.Hid/MixerButton.cs

@@ -0,0 +1,75 @@
+namespace HidSliders.Hid;
+
+[Flags]
+public enum MixerButton : long
+{
+    Button1 = 1L << 0,  // 1
+    Button2 = 1L << 1,  // 2
+    Button3 = 1L << 2,  // 4
+    Button4 = 1L << 3,  // 8
+    Button5 = 1L << 4,  // 16
+    Button6 = 1L << 5,  // 32
+    Button7 = 1L << 6,  // 64
+    Button8 = 1L << 7,  // 128
+    Button9 = 1L << 8,  // 256
+    Button10 = 1L << 9,  // 512
+    Button11 = 1L << 10, // 1024
+    Button12 = 1L << 11, // 2048
+    Button13 = 1L << 12, // 4096
+    Button14 = 1L << 13, // 8192
+    Button15 = 1L << 14, // 16384
+    Button16 = 1L << 15, // 32768
+    Button17 = 1L << 16, // 65536
+    Button18 = 1L << 17, // 131072
+    Button19 = 1L << 18, // 262144
+    Button20 = 1L << 19, // 524288
+    Button21 = 1L << 20, // 1048576
+    Button22 = 1L << 21, // 2097152
+    Button23 = 1L << 22, // 4194304
+    Button24 = 1L << 23, // 8388608
+    Button25 = 1L << 24, // 16777216
+    Button26 = 1L << 25, // 33554432
+    Button27 = 1L << 26, // 67108864
+    Button28 = 1L << 27, // 134217728
+    Button29 = 1L << 28, // 268435456
+    Button30 = 1L << 29, // 536870912
+    Button31 = 1L << 30, // 1073741824
+    Button32 = 1L << 31, // 2147483648
+    Button33 = 1L << 32, // 4294967296
+    Button34 = 1L << 33, // 8589934592
+    Button35 = 1L << 34, // 17179869184
+    Button36 = 1L << 35, // 34359738368
+    Button37 = 1L << 36, // 68719476736
+    Button38 = 1L << 37, // 137438953472
+    Button39 = 1L << 38, // 274877906944
+    Button40 = 1L << 39, // 549755813888
+    Button41 = 1L << 40, // 1099511627776
+    Button42 = 1L << 41, // 2199023255552
+    Button43 = 1L << 42, // 4398046511104
+    Button44 = 1L << 43, // 8796093022208
+    Button45 = 1L << 44  // 17592186044416
+}
+
+[Flags]
+public enum ButtonGroups : long
+{
+    Channel1 = 0b00001_00000000_00000000_00000000_00000000_11111111,
+    Channel2 = 0b00010_00000000_00000000_00000000_11111111_00000000,
+    Channel3 = 0b00100_00000000_00000000_11111111_00000000_00000000,
+    Channel4 = 0b01000_00000000_11111111_00000000_00000000_00000000,
+    Channel5 = 0b10000_11111111_00000000_00000000_00000000_00000000,
+}
+
+[Flags]
+public enum ChannelButton
+{
+    ChannelA1 = 1 << 0,
+    ChannelA2 = 1 << 1,
+    ChannelA3 = 1 << 2,
+    ChannelA4 = 1 << 3,
+    ChannelA5 = 1 << 4,
+    ChannelB1 = 1 << 5,
+    ChannelB2 = 1 << 6,
+    ChannelB3 = 1 << 7,
+    ChannelMute = 1 << 8,
+}

HidSliders.Hid/MixerButtonHelper.cs

@@ -0,0 +1,75 @@
+namespace HidSliders.Hid;
+
+public class MixerButtonHelper
+{
+    public static List<MixerButton> GetSetFlags(long value)
+    {
+        var setFlags = new List<MixerButton>();
+        foreach (MixerButton flag in Enum.GetValues(typeof(MixerButton)))
+        {
+            if ((value & (long)flag) == (long)flag)
+            {
+                setFlags.Add(flag);
+            }
+        }
+        return setFlags;
+    }
+
+    public static ButtonGroups GetButtonGroup(MixerButton button)
+    {
+        var buttonValue = (long)button;
+
+        if (((long)ButtonGroups.Channel1 & buttonValue) != 0) return ButtonGroups.Channel1;
+        if (((long)ButtonGroups.Channel2 & buttonValue) != 0) return ButtonGroups.Channel2;
+        if (((long)ButtonGroups.Channel3 & buttonValue) != 0) return ButtonGroups.Channel3;
+        if (((long)ButtonGroups.Channel4 & buttonValue) != 0) return ButtonGroups.Channel4;
+        if (((long)ButtonGroups.Channel5 & buttonValue) != 0) return ButtonGroups.Channel5;
+
+        throw new ArgumentException("The provided button does not match any button group.", nameof(button));
+    }
+
+    public static ChannelButton GetChannelButton(MixerButton button)
+    {
+        return GetChannelButton(button, GetButtonGroup(button));
+    }
+
+    public static ChannelButton GetChannelButton(MixerButton button, ButtonGroups buttonGroup)
+    {
+        var longButton = (long)button;
+        if (longButton >= 0x10000000000)
+        {
+            return ChannelButton.ChannelMute;
+        }
+
+        int intButton = 0;
+        switch (buttonGroup)
+        {
+            case ButtonGroups.Channel1:
+                intButton = (int)(longButton >> 0);
+                break;
+            case ButtonGroups.Channel2:
+                intButton = (int)(longButton >> 8);
+                break;
+            case ButtonGroups.Channel3:
+                intButton = (int)(longButton >> 16);
+                break;
+            case ButtonGroups.Channel4:
+                intButton = (int)(longButton >> 24);
+                break;
+            case ButtonGroups.Channel5:
+                intButton = (int)(longButton >> 32);
+                break;
+        }
+
+        if (((int)ChannelButton.ChannelA1 & intButton) != 0) return ChannelButton.ChannelA1;
+        if (((int)ChannelButton.ChannelA2 & intButton) != 0) return ChannelButton.ChannelA2;
+        if (((int)ChannelButton.ChannelA3 & intButton) != 0) return ChannelButton.ChannelA3;
+        if (((int)ChannelButton.ChannelA4 & intButton) != 0) return ChannelButton.ChannelA4;
+        if (((int)ChannelButton.ChannelA5 & intButton) != 0) return ChannelButton.ChannelA5;
+        if (((int)ChannelButton.ChannelB1 & intButton) != 0) return ChannelButton.ChannelB1;
+        if (((int)ChannelButton.ChannelB2 & intButton) != 0) return ChannelButton.ChannelB2;
+        if (((int)ChannelButton.ChannelB3 & intButton) != 0) return ChannelButton.ChannelB3;
+
+        throw new ArgumentException("The provided button does not match any channel button in the specified button group.", nameof(button));
+    }
+}