59 lines
1.9 KiB
Python
Executable file
59 lines
1.9 KiB
Python
Executable file
#!/usr/bin/env python3
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import serial
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def chunked(data, chunk_size):
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for i in range(0, len(data), chunk_size):
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yield data[i:i+chunk_size]
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def frame_packet(data):
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if len(data) > 254:
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raise ValueError('Input too long')
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out = b''
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for run in data.split(b'\0'):
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out += bytes([len(run)+1])
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out += run
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out += b'\0'
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return out
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def format_packet(data):
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out = b''
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for a, b, c, d, e, f, g, h in chunked(data, 8):
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ah, bh, ch, dh = a>>8, b>>8, c>>8, d>>8
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eh, fh, gh, hh = e>>8, f>>8, g>>8, h>>8
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al, bl, cl, dl = a&0xff, b&0xff, c&0xff, d&0xff
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el, fl, gl, hl = e&0xff, f&0xff, g&0xff, h&0xff
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# FIXME check order of high bits
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out += bytes([al, bl, cl, dl, el, fl, gl, hl,
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(ah<<6 | bh<<4 | ch<<2 | dh<<0)&0xff,
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(eh<<6 | fh<<4 | gh<<2 | hh<<0)&0xff])
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out += bytes([1, 0, 0, 0]) # global intensity
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return out
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if __name__ == '__main__':
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import argparse
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import time
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parser = argparse.ArgumentParser()
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parser.add_argument('serial')
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args = parser.parse_args()
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ser = serial.Serial(args.serial, 2000000)
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frame_len = 4*8*8
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black, red = [0]*frame_len, [255]*frame_len
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frames = \
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[black]*10 +\
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[red]*10 +\
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[[i]*frame_len for i in range(256)] +\
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[[(i + (d//8)*8) % 256*8 for d in range(frame_len)] for i in range(256)]
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#frames = [red, black]*5
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#frames = [ x for l in [[([0]*i+[255]+[0]*(7-i))*32]*2 for i in range(8)] for x in l ]
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while True:
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for i, frame in enumerate(frames):
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formatted = format_packet(frame)
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framed = b'\0' + frame_packet(formatted[:162]) + frame_packet(formatted[162:])
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print('sending', i, len(frame), len(formatted), len(framed))
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ser.write(framed)
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time.sleep(0.02)
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# to produce framing errors: ser.write(b'\02a\0')
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