New matrix example for RP2040 Feather

CircuitPython_RGBMatrix/rp2040.py

@@ -0,0 +1,52 @@
+import time
+from math import sin
+import board
+import displayio
+import rgbmatrix
+import framebufferio
+import adafruit_imageload
+import terminalio
+from adafruit_display_text.label import Label
+
+displayio.release_displays()
+matrix = rgbmatrix.RGBMatrix(
+    width=64, bit_depth=6,
+    rgb_pins=[board.D6, board.D5, board.D9, board.D11, board.D10, board.D12],
+    addr_pins=[board.D25, board.D24, board.A3, board.A2],
+    clock_pin=board.D13, latch_pin=board.D0, output_enable_pin=board.D1,
+    doublebuffer=True)
+display = framebufferio.FramebufferDisplay(matrix, auto_refresh=False)
+
+g = displayio.Group()
+b, p = adafruit_imageload.load("pi-logo32b.bmp")
+t = displayio.TileGrid(b, pixel_shader=p)
+t.x = 20
+g.append(t)
+
+l = Label(text="Feather\nRP2040", font=terminalio.FONT, color=0xffffff, line_spacing=.7)
+g.append(l)
+
+display.show(g)
+
+target_fps = 50
+ft = 1/target_fps
+now = t0 = time.monotonic_ns()
+deadline = t0 + ft
+
+p = 1
+q = 17
+while True:
+    tm = (now - t0) * 1e-9
+    x = l.x - 1
+    if x < -40:
+        x = 63
+    y =  round(12 + sin(tm / p) * 6)
+    l.x = x
+    l.y = y
+    display.refresh(target_frames_per_second=target_fps, minimum_frames_per_second=0)
+    while True:
+        now = time.monotonic_ns()
+        if now > deadline:
+            break
+        time.sleep((deadline - now) * 1e-9)
+    deadline += ft