1 #!/usr/bin/env python |
1 #!/usr/bin/env python |
2 |
2 |
3 import collections |
3 import qmsk.dmx |
4 import serial |
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5 import time |
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6 |
4 |
7 import logging; log = logging.getLogger('dmx') |
5 import logging; log = logging.getLogger('dmx') |
8 |
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9 class DMXError (Exception) : |
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10 def __init__ (self, **kwargs) : |
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11 self.kwargs = kwargs |
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12 |
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13 def __str__ (self) : |
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14 return self.__doc__.strip().format(**self.kwargs) |
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15 |
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16 class DMXCommandError (DMXError) : |
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17 """ |
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18 Command {cmd!r} failed: {out!r} |
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19 """ |
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20 |
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21 class DMXUnknownCommandError (DMXError) : |
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22 """ |
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23 Unknown command: {cmd!r} |
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24 """ |
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25 |
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26 class DMX (object) : |
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27 """ |
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28 Arudino-based DMX controller using src/hello-dmx.c over the serial port. |
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29 """ |
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30 |
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31 SERIAL = '/dev/arduino' |
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32 SERIAL_BAUD = 9600 |
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33 SERIAL_TIMEOUT = 1.0 |
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34 |
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35 @classmethod |
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36 def open (cls, path, baud=SERIAL_BAUD, timeout=SERIAL_TIMEOUT) : |
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37 return cls(serial.Serial(path, baud, timeout=timeout)) |
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38 |
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39 def __init__ (self, io) : |
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40 self.io = io |
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41 |
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42 # XXX: bug |
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43 self.io.write('\r') |
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44 self.io.flush() |
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45 self.io.read(1) |
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46 |
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47 def _arg (self, arg) : |
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48 if isinstance(arg, str) : |
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49 value, = arg |
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50 value = ord(value) |
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51 elif isinstance(arg, int) : |
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52 value = arg |
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53 else : |
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54 raise ValueError(arg) |
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55 |
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56 if 0 <= value <= 255 : |
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57 return str(value) |
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58 else : |
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59 raise ValueError(value) |
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60 |
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61 def __call__ (self, cmd, *args) : |
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62 out = cmd + ' ' + ' '.join(self._arg(arg) for arg in args) + '\r' |
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63 |
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64 log.info("%s", out) |
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65 |
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66 self.io.write(out) |
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67 self.io.flush() |
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68 |
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69 ret = self.io.read(len(out)) |
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70 |
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71 if '!' in ret : |
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72 raise DMXCommandError(cmd=out, out=ret) |
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73 |
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74 elif '?' in ret : |
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75 raise DMXUnknownCommandError(cmd=cmd) |
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76 |
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77 def clear (self) : |
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78 """ |
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79 Set dmx = [ ] |
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80 |
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81 i.e. start transmitting zero-length DMX packets. |
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82 For most lights, this seems to be equivalent to losing the DMX signal, and they retain their old state. |
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83 """ |
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84 |
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85 self('c') |
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86 |
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87 def zero (self) : |
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88 """ |
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89 Set dmx = [0, ...] |
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90 |
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91 Uses the maximum DMX packet length available. |
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92 """ |
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93 |
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94 self('z') |
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95 |
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96 def out (self, *values) : |
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97 """ |
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98 Set dmx = (value, ...) |
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99 """ |
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100 |
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101 self('o', *values) |
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102 |
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103 def set (self, start, *values) : |
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104 """ |
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105 Set dmx[start:] = value |
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106 """ |
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107 |
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108 self('s', start, *values) |
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109 |
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110 def fill (self, start, end, *values) : |
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111 """ |
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112 Set dmx[start:end] to repetitions of (value, ...) |
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113 """ |
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114 |
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115 self('f', start, end, *values) |
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116 |
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117 def range (self, start, stop, step, value) : |
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118 """ |
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119 Set dmx[start:end:step] = value |
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120 """ |
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121 |
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122 self('r', start, stop, step, value) |
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123 |
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124 def __setitem__ (self, index, value) : |
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125 if isinstance(value, collections.Sequence) : |
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126 values = tuple(value) |
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127 else : |
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128 values = (value, ) |
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129 |
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130 if isinstance(index, slice) : |
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131 if index.start and index.stop and index.step : |
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132 # XXX: single |
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133 self.range(index.start, index.stop, index.step, value) |
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134 |
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135 elif index.start and index.stop : |
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136 self.fill(index.start, index.stop, *values) |
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137 |
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138 elif index.start : |
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139 self.set(index.start, *values) |
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140 |
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141 else : |
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142 raise IndexError("invalid slice: %s" % (index, )) |
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143 |
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144 else : |
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145 # simple set |
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146 self.set(index, *values) |
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147 |
6 |
148 import argparse |
7 import argparse |
149 |
8 |
150 def main (argv) : |
9 def main (argv) : |
151 parser = argparse.ArgumentParser() |
10 parser = argparse.ArgumentParser() |
152 parser.add_argument('--serial', default=DMX.SERIAL, |
11 parser.add_argument('--serial', default=qmsk.dmx.DMX.SERIAL, |
153 help="Path to /dev/tty*") |
12 help="Path to /dev/tty*") |
154 parser.add_argument('--zero', action='store_true', |
13 parser.add_argument('--zero', action='store_true', |
155 help="Zero output before setting") |
14 help="Zero output before setting") |
156 parser.add_argument('--start', type=int, |
15 parser.add_argument('--start', type=int, |
157 help="Set from start offset") |
16 help="Set from start offset") |