adjust display controller

to run single threaded instead of multithreaded

src/display_manager.py

@@ -4,22 +4,46 @@ import time
 from typing import Dict, Any
 
 class DisplayManager:
+    _instance = None
+    _initialized = False
+
+    def __new__(cls, *args, **kwargs):
+        if cls._instance is None:
+            cls._instance = super(DisplayManager, cls).__new__(cls)
+        return cls._instance
+
     def __init__(self, config: Dict[str, Any]):
-        self.config = config
-        self.matrix = self._setup_matrix()
-        self.font = ImageFont.truetype("DejaVuSans.ttf", 24)
-        self.image = Image.new('RGB', (self.matrix.width, self.matrix.height))
-        self.draw = ImageDraw.Draw(self.image)
+        # Only initialize once
+        if not DisplayManager._initialized:
+            self.config = config
+            self.matrix = self._setup_matrix()
+            self.font = ImageFont.truetype("DejaVuSans.ttf", 24)
+            self.image = Image.new('RGB', (self.matrix.width, self.matrix.height))
+            self.draw = ImageDraw.Draw(self.image)
+            DisplayManager._initialized = True
 
     def _setup_matrix(self) -> RGBMatrix:
         """Setup the RGB matrix with the provided configuration."""
         options = RGBMatrixOptions()
+        
+        # Hardware specific settings
+        options.hardware_mapping = 'adafruit-hat'  # Set for Adafruit Bonnet/HAT
+        options.gpio_slowdown = 4  # Required for Pi 3
         options.rows = self.config.get('rows', 32)
         options.cols = self.config.get('cols', 64)
         options.chain_length = self.config.get('chain_length', 2)
-        options.hardware_mapping = 'adafruit-hat'
-        options.gpio_slowdown = 4
+        options.parallel = 1
+        options.pwm_bits = 11
         options.brightness = self.config.get('brightness', 50)
+        options.pwm_lsb_nanoseconds = 130
+        options.led_rgb_sequence = "RGB"
+        options.pixel_mapper_config = ""
+        options.multiplexing = 0
+        
+        # Additional options for stability
+        options.disable_hardware_pulsing = False
+        options.show_refresh_rate = 1
+        options.limit_refresh_rate_hz = 100
         
         return RGBMatrix(options=options)
 
@@ -36,4 +60,7 @@ class DisplayManager:
 
     def cleanup(self):
         """Clean up resources."""
-        self.matrix.Clear() 
+        self.matrix.Clear()
+        # Reset the singleton state when cleaning up
+        DisplayManager._instance = None
+        DisplayManager._initialized = False