118 lines
3.1 KiB
Python
118 lines
3.1 KiB
Python
add_library('serial')
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import math
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import jarray
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gamma = 1.7
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brightness = 4
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errorCount = 0
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framerate = 30
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dimension = 0
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long_line = True
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ledSerial = None
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data = None
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current_px = 0
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def serialConfigure(portName):
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global ledSerial
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try:
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ledSerial = Serial(this, portName)
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if ledSerial is None:
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raise NullPointerException()
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ledSerial.write('?')
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except Exception as e:
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println("Serial port " + portName + " does not exist or is non-functional")
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errorCount += 1
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return
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delay(50);
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line_serial = ledSerial.readStringUntil(10)
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if (line is None):
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println("Serial port " + portName + " is not responding.")
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println("Is it really a Teensy 3.0 running VideoDisplay?")
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errorCount += 1
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return
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param = line_serial.split(",")
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if (len(param) != 12):
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println("Error: port " + portName + " did not respond to LED config query")
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errorCount += 1
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return
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def image2data(data):
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offset = 3
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pixel_nb = 0
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for x in range(0, height):
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pixel_line = pixels[pixel_nb:pixel_nb+width]
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if long_line and pixel_nb/width%2 == 1:
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pixel_line = reversed(pixel_line)
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for px in pixel_line:
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pixel = [colorWiring(px) for i in range(0, 8)]
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imgmask = 0x800000
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while imgmask != 0:
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b = 0
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for i in range(0, 8):
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if ((pixel[i] & imgmask) != 0):
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b |= (1 << i)
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if b > 127:
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# Convert to signed bytes (expected by jarray)
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b -= 2**8
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data[offset] = b
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else:
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data[offset] = b
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offset += 1
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imgmask >>= 1
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pixel_nb +=1
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def colorWiring(c):
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red = (c & 0xFF0000) >> 16
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green = (c & 0x00FF00) >> 8
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blue = (c & 0x0000FF)
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red = gammatable[red] >> 8
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green = gammatable[green] >> 8
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blue = gammatable[blue] >> 8
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return (green << 16) | (red << 8) | (blue)
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def send_serial():
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image2data(data)
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ledSerial.write(data)
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def prepare_data():
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global data
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data = jarray.zeros(dimension * 24 + 3, "b")
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data[0] = ord('*')
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usec = int((1000000.0 / framerate) * 0.75)
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data[1] = (usec % 256) - 2**8
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data[2] = usec >> 8
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def setup():
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global gammatable
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global dimension
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size(8, 5)
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dimension = width * height
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frameRate(framerate)
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serialConfigure("/dev/ttyACM0")
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if (errorCount > 0):
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exit()
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gammatable = [int((math.pow(i / 255.0, gamma) * 255.0 + 0.5) * brightness) for i in range(0, 256)]
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prepare_data()
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loadPixels()
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for i in range(dimension):
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pixels[i] = color(0, 0, 0)
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updatePixels()
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def draw():
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global current_px
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pixels[current_px] = color(0, 255, 0)
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if current_px == 0:
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pixels[len(pixels) - 1] = color(0, 0, 0)
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else:
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pixels[current_px - 1] = color(0, 0, 0)
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updatePixels()
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if current_px == len(pixels) - 1:
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current_px = 0
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else:
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current_px += 1
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send_serial()
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