The fundamentals of the new ctypes interface are working

host/matelight.py

@@ -0,0 +1,35 @@
+import usb
+import colorsys
+import numpy as np
+import itertools
+
+CRATE_WIDTH = 5
+CRATE_HEIGHT = 4
+CRATES_X = 8
+CRATES_Y = 4
+
+DISPLAY_WIDTH = CRATES_X*CRATE_WIDTH
+DISPLAY_HEIGHT = CRATES_Y*CRATE_HEIGHT
+FRAME_SIZE = CRATE_WIDTH*CRATE_HEIGHT*3
+
+dev = usb.core.find(idVendor=0x1cbe, idProduct=0x0003)
+
+def sendframe(framedata):
+	""" Send a frame to the display
+
+	The argument contains a h * w array of 3-tuples of (r, g, b)-data or 4-tuples of (r, g, b, a)-data where the a
+	channel is ignored.
+	"""
+	def chunks(l, n):
+		for i in xrange(0, len(l), n):
+			yield l[i:i+n]
+
+	for cx, cy in itertools.product(range(DISPLAY_WIDTH), range(DISPLAY_HEIGHT)):
+		data = [ v for x in range(CRATE_WIDTH) for y in range(CRATE_HEIGHT) for v in framedata[cy*CRATE_HEIGHT + y][cx*CRATE_WIDTH + x][:3] ]
+		if len(data) != FRAME_SIZE:
+			raise ValueError('Invalid frame data. Expected {} bytes, got {}.'.format(FRAME_SIZE, len(data)))
+		# Send framebuffer data
+		dev.write(0x01, bytes([0, x, y])+bytes(data))
+	# Send latch command
+	dev.write(0x01, b'\x01')
+