mirror of
https://github.com/brmlab/ledbar.git
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50 lines
1.6 KiB
Python
50 lines
1.6 KiB
Python
#!/usr/bin/python
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# vim:et:sw=4:ts=4:sts=4
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import sys
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import time
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class Ledbar:
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def __init__(self, boxes=20, secs_per_frame=0.025):
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self.boxes = boxes
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self.secs_per_frame = secs_per_frame
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self.last_update = time.time()
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self.pixels = []
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for i in xrange(boxes):
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self.pixels.append([0, 0, 0])
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def set_pixel(self, pixel, red, green, blue):
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self.set_red(pixel, red)
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self.set_green(pixel, green)
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self.set_blue(pixel, blue)
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def set_red(self, pixel, red):
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if red < 0.0 or red > 1.0: raise ValueError('red has to be between 0.0 and 1.0')
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self.pixels[pixel][0] = int(red*255.99)
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def set_green(self, pixel, green):
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if green < 0.0 or green > 1.0: raise ValueError('green has to be between 0.0 and 1.0')
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self.pixels[pixel][1] = int(green*255.99)
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def set_blue(self, pixel, blue):
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if blue < 0.0 or blue > 1.0: raise ValueError('blue has to be between 0.0 and 1.0')
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self.pixels[pixel][2] = int(blue*255.99)
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def echo(self, s, no_newline=False):
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sys.stderr.write(str(s) + ('' if no_newline else '\n'))
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def update(self):
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now = time.time()
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delta = now - self.last_update
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if delta < self.secs_per_frame:
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time.sleep(self.secs_per_frame - delta)
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try:
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for p in self.pixels:
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for c in p:
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sys.stdout.write(chr(c))
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sys.stdout.flush()
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except IOError:
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return False
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self.last_update += self.secs_per_frame
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return True
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