Import led-driver app: pico/ and esp32/ layout

Co-authored-by: Cursor <cursoragent@cursor.com>

pico/src/patterns/circle.py

@@ -0,0 +1,96 @@
+import utime
+
+
+class Circle:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def run(self, preset):
+        """Circle loading pattern - grows to n2, then tail moves forward at n3 until min length n4"""
+        head = 0
+        tail = 0
+
+        # Calculate timing from preset
+        head_rate = max(1, int(preset.n1))  # n1 = head moves per second
+        tail_rate = max(1, int(preset.n3))  # n3 = tail moves per second
+        max_length = max(1, int(preset.n2))  # n2 = max length
+        min_length = max(0, int(preset.n4))  # n4 = min length
+
+        head_delay = 1000 // head_rate  # ms between head movements
+        tail_delay = 1000 // tail_rate  # ms between tail movements
+
+        last_head_move = utime.ticks_ms()
+        last_tail_move = utime.ticks_ms()
+
+        phase = "growing"  # "growing", "shrinking", or "off"
+
+        # Support up to two colors (like chase). If only one color is provided,
+        # use black for the second; if none, default to white.
+        colors = preset.c
+        if not colors:
+            base0 = base1 = (255, 255, 255)
+        elif len(colors) == 1:
+            base0 = colors[0]
+            base1 = (0, 0, 0)
+        else:
+            base0 = colors[0]
+            base1 = colors[1]
+
+        color0 = self.driver.apply_brightness(base0, preset.b)
+        color1 = self.driver.apply_brightness(base1, preset.b)
+
+        while True:
+            current_time = utime.ticks_ms()
+
+            # Background: use second color during the "off" phase, otherwise clear to black
+            if phase == "off":
+                self.driver.n.fill(color1)
+            else:
+                self.driver.n.fill((0, 0, 0))
+
+            # Calculate segment length
+            segment_length = (head - tail) % self.driver.num_leds
+            if segment_length == 0 and head != tail:
+                segment_length = self.driver.num_leds
+
+            # Draw segment from tail to head as a solid color (no per-LED alternation)
+            current_color = color0
+            for i in range(segment_length + 1):
+                led_pos = (tail + i) % self.driver.num_leds
+                self.driver.n[led_pos] = current_color
+
+            # Move head continuously at n1 LEDs per second
+            if utime.ticks_diff(current_time, last_head_move) >= head_delay:
+                head = (head + 1) % self.driver.num_leds
+                last_head_move = current_time
+
+            # Tail behavior based on phase
+            if phase == "growing":
+                # Growing phase: tail stays at 0 until max length reached
+                if segment_length >= max_length:
+                    phase = "shrinking"
+            elif phase == "shrinking":
+                # Shrinking phase: move tail forward at n3 LEDs per second
+                if utime.ticks_diff(current_time, last_tail_move) >= tail_delay:
+                    tail = (tail + 1) % self.driver.num_leds
+                    last_tail_move = current_time
+
+                    # Check if we've reached min length
+                    current_length = (head - tail) % self.driver.num_leds
+                    if current_length == 0 and head != tail:
+                        current_length = self.driver.num_leds
+
+                    # For min_length = 0, we need at least 1 LED (the head)
+                    if min_length == 0 and current_length <= 1:
+                        phase = "off"  # All LEDs off for 1 step
+                    elif min_length > 0 and current_length <= min_length:
+                        phase = "growing"  # Cycle repeats
+            else:  # phase == "off"
+                # Off phase: second color fills the ring for 1 step, then restart
+                tail = head  # Reset tail to head position to start fresh
+                phase = "growing"
+
+            self.driver.n.write()
+
+            # Yield once per tick so other logic can run
+            yield