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

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)