Mercurial > code > home > repos > homeauto

comparison service/arduinoNode/devices.py @ 164:49c1756b2edb

Find changesets by keywords (author, files, the commit message), revision number or hash, or revset expression.
start arduinonode Ignore-this: 6ddc4d3af9ab8468e25b346bddf15835
author drewp@bigasterisk.com
date Mon, 06 Apr 2015 02:13:39 -0700
parents
children c0180bd2b33a
comparison
equal deleted inserted replaced
163:4b0f221d790c 164:49c1756b2edb
1 from rdflib import Namespace, RDF, URIRef
2
3 ROOM = Namespace('http://projects.bigasterisk.com/room/')
4
5 class BoardInput(object):
6 """
7 one device that gives us input. this includes processing to make
8 statements, but this object doesn't store state
9 """
10 def __init__(self, graph, uri):
11 self.graph, self.uri = graph, uri
12
13 def readFromPoll(self, read):
14 """
15 read an update message returned as part of a poll bundle. This may
16 consume a varying number of bytes depending on the type of
17 input (e.g. IR receiver).
18 Returns rdf statements.
19 """
20 raise NotImplementedError
21
22 def generateSetupCode(self):
23 return ''
24
25 def generatePollCode(self):
26 return ''
27
28 def pinNumber(self, pred=ROOM['pin']):
29 pinUri = self.graph.value(self.uri, pred)
30 return int(self.graph.value(pinUri, ROOM['pinNumber']))
31
32 _inputForType = {}
33 def registerInput(deviceType):
34 def newcls(cls):
35 _inputForType[deviceType] = cls
36 return cls
37 return newcls
38
39 class PingInput(BoardInput):
40 def generatePollCode(self):
41 return "Serial.write('k');"
42 def readFromPoll(self, read):
43 if read(1) != 'k':
44 raise ValueError('invalid ping response')
45 return [(self.uri, ROOM['ping'], ROOM['ok'])]
46
47 @registerInput(deviceType=ROOM['MotionSensor'])
48 class MotionSensorInput(BoardInput):
49 def generateSetupCode(self):
50 return 'pinMode(%(pin)d, INPUT); digitalWrite(%(pin)d, LOW);' % {
51 'pin': self.pinNumber(),
52 }
53
54 def generatePollCode(self):
55 return "Serial.write(digitalRead(%(pin)d) ? 'y' : 'n');" % {
56 'pin': self.pinNumber()
57 }
58
59 def readFromPoll(self, read):
60 b = read(1)
61 if b not in 'yn':
62 raise ValueError('unexpected response %r' % b)
63 motion = b == 'y'
64 return [(self.uri, ROOM['sees'],
65 ROOM['motion'] if motion else ROOM['noMotion'])]
66
67 def makeBoardInput(graph, uri):
68 deviceType = graph.value(uri, RDF.type)
69 return _inputForType[deviceType](graph, uri)
70