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annotate service/arduinoNode/devices.py @ 971:fbe72d44f15a

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only recompile if the C code is new. redo Device class api. single temperature sensor is working Ignore-this: e78106d25dbb2ac8c5e5d8a81d576358 darcs-hash:20150411084359-312f9-7c50d2f4f21dd9d5a0fa8913873a1e6d7d325118
author drewp <drewp@bigasterisk.com>
date Sat, 11 Apr 2015 01:43:59 -0700
parents 70a5392b24d3
children d228105749ac
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 from rdflib import Namespace, RDF, URIRef, Literal
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2
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3 ROOM = Namespace('http://projects.bigasterisk.com/room/')
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4
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5 def readLine(read):
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6 buf = ''
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7 for c in iter(lambda: read(1), '\n'):
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8 buf += c
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9 return buf
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10
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11 class DeviceType(object):
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12 deviceType = None
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13 @classmethod
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14 def findInstances(cls, graph, board):
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15 """
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16 return any number of instances of this class for all the separately
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17 controlled devices on the board. Two LEDS makes two instances,
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18 but two sensors on the same onewire bus makes only one device
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19 (which yields more statements).
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20 """
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21 instances = []
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22 for row in graph.query("""SELECT ?dev ?pinNumber WHERE {
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23 ?board :hasPin ?pin .
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24 ?pin :pinNumber ?pinNumber;
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25 :connectedTo ?dev .
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26 ?dev a ?thisType .
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27 } ORDER BY ?dev""",
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28 initBindings=dict(board=board,
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29 thisType=cls.deviceType),
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30 initNs={'': ROOM}):
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31 instances.append(cls(graph, row.dev, int(row.pinNumber)))
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32 return instances
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33
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34 # subclasses may add args to this
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35 def __init__(self, graph, uri, pinNumber):
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36 self.graph, self.uri = graph, uri
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37 self.pinNumber = pinNumber
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38
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39 def readFromPoll(self, read):
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40 """
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41 read an update message returned as part of a poll bundle. This may
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42 consume a varying number of bytes depending on the type of
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43 input (e.g. IR receiver).
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44 Returns rdf statements.
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45 """
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46 raise NotImplementedError('readFromPoll in %s' % self.__class__)
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47
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48 def generateIncludes(self):
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49 return []
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50
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51 def generateArduinoLibs(self):
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52 return []
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53
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54 def generateGlobalCode(self):
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55 return ''
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56
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57 def generateSetupCode(self):
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58 return ''
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59
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60 def generatePollCode(self):
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61 """if this returns nothing, we don't try to poll this device"""
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62 return ''
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63
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64 def generateActionCode(self):
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65 """
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66 if you get called to do your action, this code reads the args you
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67 need and do the right action
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68 """
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69 return ''
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70
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71 _knownTypes = set()
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72 def register(deviceType):
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73 _knownTypes.add(deviceType)
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74 return deviceType
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75
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76 @register
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77 class PingInput(DeviceType):
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78 @classmethod
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79 def findInstances(cls, graph, board):
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80 return [cls(graph, board, None)]
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81
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82 def generatePollCode(self):
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83 return "Serial.write('k');"
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84 def readFromPoll(self, read):
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85 if read(1) != 'k':
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86 raise ValueError('invalid ping response')
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87 return [(self.uri, ROOM['ping'], ROOM['ok'])]
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88
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89 @register
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90 class MotionSensorInput(DeviceType):
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91 deviceType = ROOM['MotionSensor']
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92 def generateSetupCode(self):
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93 return 'pinMode(%(pin)d, INPUT); digitalWrite(%(pin)d, LOW);' % {
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94 'pin': self.pinNumber(),
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95 }
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96
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97 def generatePollCode(self):
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98 return "Serial.write(digitalRead(%(pin)d) ? 'y' : 'n');" % {
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99 'pin': self.pinNumber()
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100 }
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101
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102 def readFromPoll(self, read):
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103 b = read(1)
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104 if b not in 'yn':
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105 raise ValueError('unexpected response %r' % b)
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106 motion = b == 'y'
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107 return [(self.uri, ROOM['sees'],
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108 ROOM['motion'] if motion else ROOM['noMotion'])]
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109
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110 @register
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111 class OneWire(DeviceType):
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112 deviceType = ROOM['OneWire']
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113
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114 def generateIncludes(self):
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115 return ['OneWire.h', 'DallasTemperature.h']
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116
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117 def generateArduinoLibs(self):
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118 return ['OneWire', 'DallasTemperature']
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119
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120 def generateGlobalCode(self):
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121 # not yet isolated to support multiple OW buses
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122 return '''
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123 OneWire oneWire(%(pinNumber)s);
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124 DallasTemperature sensors(&oneWire);
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125 DeviceAddress tempSensorAddress;
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126 #define NUM_TEMPERATURE_RETRIES 5
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127
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128 void initSensors() {
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129 sensors.begin();
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130 sensors.getAddress(tempSensorAddress, 0);
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131 sensors.setResolution(tempSensorAddress, 12);
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132 }
969
70a5392b24d3 start arduinonode
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133
971
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134 ''' % dict(pinNumber=self.pinNumber)
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135 def generatePollCode(self):
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136 return r'''
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137 for (int i=0; i<NUM_TEMPERATURE_RETRIES; i++) {
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138 sensors.requestTemperatures();
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139 float newTemp = sensors.getTempF(tempSensorAddress);
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140 if (i < NUM_TEMPERATURE_RETRIES-1 &&
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141 (newTemp < -100 || newTemp > 180)) {
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142 // too many errors that were fixed by restarting arduino.
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143 // trying repeating this much init
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144 initSensors();
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145 continue;
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146 }
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147 Serial.print(newTemp);
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148 Serial.print('\n');
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149 Serial.print((char)i);
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150 break;
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151 }
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152 '''
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153
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154 def readFromPoll(self, read):
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155 newTemp = readLine(read)
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156 retries = ord(read(1))
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157 return [
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158 (self.uri, ROOM['temperatureF'], Literal(newTemp)),
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159 (self.uri, ROOM['temperatureRetries'], Literal(retries)),
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160 ]
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161
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162 def makeDevices(graph, board):
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163 out = []
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164 for dt in sorted(_knownTypes, key=lambda cls: cls.__name__):
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165 out.extend(dt.findInstances(graph, board))
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166 return out
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167