forked from brendan-w/python-OBD
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathtest_decoders.py
370 lines (267 loc) · 13.9 KB
/
test_decoders.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
from binascii import unhexlify
import obd.decoders as d
from obd.UnitsAndScaling import Unit
from obd.codes import BASE_TESTS, COMPRESSION_TESTS, SPARK_TESTS, TEST_IDS
from obd.protocols.protocol import Frame, Message
# returns a list with a single valid message,
# containing the requested data
def m(hex_data, frames=None):
# most decoders don't look at the underlying frame objects
message = Message(frames or [])
message.data = bytearray(unhexlify(hex_data))
return [message]
FLOAT_EQUALS_TOLERANCE = 0.025
# comparison for pint floating point values
def float_equals(va, vb):
units_match = (va.u == vb.u)
values_match = (abs(va.magnitude - vb.magnitude) < FLOAT_EQUALS_TOLERANCE)
return values_match and units_match
# NOTE: the prefix string is denoting the split between header (mode/PID bytes) and data
def test_noop():
assert d.noop(m("00010203")) == bytearray([0, 1, 2, 3])
def test_drop():
assert d.drop(m("deadbeef")) is None
def test_raw_string():
assert d.raw_string([Message([])]) == ""
assert d.raw_string([Message([Frame("NO DATA")])]) == "NO DATA"
assert d.raw_string([Message([Frame("A"), Frame("B")])]) == "A\nB"
assert d.raw_string([Message([Frame("A")]), Message([Frame("B")])]) == "A\nB"
def test_pid():
assert d.pid(m("4100" + "00000000")).bits == "00000000000000000000000000000000"
assert d.pid(m("4100" + "F00AA00F")).bits == "11110000000010101010000000001111"
assert d.pid(m("4100" + "11")).bits == "00010001"
def test_percent():
assert d.percent(m("4100" + "00")) == 0.0 * Unit.percent
assert d.percent(m("4100" + "FF")) == 100.0 * Unit.percent
def test_percent_centered():
assert d.percent_centered(m("4100" + "00")) == -100.0 * Unit.percent
assert d.percent_centered(m("4100" + "80")) == 0.0 * Unit.percent
assert float_equals(d.percent_centered(m("4100" + "FF")), 99.2 * Unit.percent)
def test_temp():
assert d.temp(m("4100" + "00")) == Unit.Quantity(-40, Unit.celsius)
assert d.temp(m("4100" + "FF")) == Unit.Quantity(215, Unit.celsius)
assert d.temp(m("4100" + "03E8")) == Unit.Quantity(960, Unit.celsius)
def test_current_centered():
assert d.current_centered(m("4100" + "00000000")) == -128.0 * Unit.milliampere
assert d.current_centered(m("4100" + "00008000")) == 0.0 * Unit.milliampere
assert d.current_centered(m("4100" + "ABCD8000")) == 0.0 * Unit.milliampere
# first 2 bytes are unused (should be disregarded)
assert float_equals(d.current_centered(m("4100" + "0000FFFF")), 128.0 * Unit.milliampere)
def test_sensor_voltage():
assert d.sensor_voltage(m("4100" + "0000")) == 0.0 * Unit.volt
assert d.sensor_voltage(m("4100" + "FFFF")) == 1.275 * Unit.volt
def test_sensor_voltage_big():
assert d.sensor_voltage_big(m("4100" + "00000000")) == 0.0 * Unit.volt
assert float_equals(d.sensor_voltage_big(m("4100" + "00008000")), 4.0 * Unit.volt)
assert d.sensor_voltage_big(m("4100" + "0000FFFF")) == 8.0 * Unit.volt
assert d.sensor_voltage_big(m("4100" + "ABCD0000")) == 0.0 * Unit.volt
# first 2 bytes are unused (should be disregarded)
def test_fuel_pressure():
assert d.fuel_pressure(m("4100" + "00")) == 0 * Unit.kilopascal
assert d.fuel_pressure(m("4100" + "80")) == 384 * Unit.kilopascal
assert d.fuel_pressure(m("4100" + "FF")) == 765 * Unit.kilopascal
def test_pressure():
assert d.pressure(m("4100" + "00")) == 0 * Unit.kilopascal
assert d.pressure(m("4100" + "00")) == 0 * Unit.kilopascal
def test_evap_pressure():
pass
# TODO
# assert d.evap_pressure(m("4100"+"0000")) == 0.0 * Unit.PA)
def test_abs_evap_pressure():
assert d.abs_evap_pressure(m("4100" + "0000")) == 0 * Unit.kilopascal
assert d.abs_evap_pressure(m("4100" + "FFFF")) == 327.675 * Unit.kilopascal
def test_evap_pressure_alt():
assert d.evap_pressure_alt(m("4100" + "0000")) == -32767 * Unit.pascal
assert d.evap_pressure_alt(m("4100" + "7FFF")) == 0 * Unit.pascal
assert d.evap_pressure_alt(m("4100" + "FFFF")) == 32768 * Unit.pascal
def test_timing_advance():
assert d.timing_advance(m("4100" + "00")) == -64.0 * Unit.degrees
assert d.timing_advance(m("4100" + "FF")) == 63.5 * Unit.degrees
def test_inject_timing():
assert d.inject_timing(m("4100" + "0000")) == -210 * Unit.degrees
assert float_equals(d.inject_timing(m("4100" + "FFFF")), 302 * Unit.degrees)
def test_max_maf():
assert d.max_maf(m("4100" + "00000000")) == 0 * Unit.grams_per_second
assert d.max_maf(m("4100" + "FF000000")) == 2550 * Unit.grams_per_second
assert d.max_maf(
m("4100" + "00ABCDEF")) == 0 * Unit.grams_per_second # last 3 bytes are unused (should be disregarded)
def test_fuel_rate():
assert d.fuel_rate(m("4100" + "0000")) == 0.0 * Unit.liters_per_hour
assert d.fuel_rate(m("4100" + "FFFF")) == 3276.75 * Unit.liters_per_hour
def test_fuel_status():
assert d.fuel_status(m("4100" + "0100")) == ("Open loop due to insufficient engine temperature", "")
assert d.fuel_status(m("4100" + "0800")) == ("Open loop due to system failure", "")
assert d.fuel_status(m("4100" + "0808")) == ("Open loop due to system failure",
"Open loop due to system failure")
assert d.fuel_status(m("4100" + "0008")) == ("", "Open loop due to system failure")
assert d.fuel_status(m("4100" + "0000")) is None
assert d.fuel_status(m("4100" + "0300")) is None
assert d.fuel_status(m("4100" + "0303")) is None
def test_air_status():
assert d.air_status(m("4100" + "01")) == "Upstream"
assert d.air_status(m("4100" + "08")) == "Pump commanded on for diagnostics"
assert d.air_status(m("4100" + "03")) is None
def test_fuel_type():
assert d.fuel_type(m("4100" + "00")) == "Not available"
assert d.fuel_type(m("4100" + "17")) == "Bifuel running diesel"
assert d.fuel_type(m("4100" + "18")) is None
def test_obd_compliance():
assert d.obd_compliance(m("4100" + "00")) == "Undefined"
assert d.obd_compliance(m("4100" + "21")) == "Heavy Duty Euro OBD Stage VI (HD EOBD-IV)"
assert d.obd_compliance(m("4100" + "22")) is None
def test_o2_sensors():
assert d.o2_sensors(m("4100" + "00")) == ((), (False, False, False, False), (False, False, False, False))
assert d.o2_sensors(m("4100" + "01")) == ((), (False, False, False, False), (False, False, False, True))
assert d.o2_sensors(m("4100" + "0F")) == ((), (False, False, False, False), (True, True, True, True))
assert d.o2_sensors(m("4100" + "F0")) == ((), (True, True, True, True), (False, False, False, False))
def test_o2_sensors_alt():
assert d.o2_sensors_alt(m("4100" + "00")) == ((), (False, False), (False, False), (False, False), (False, False))
assert d.o2_sensors_alt(m("4100" + "01")) == ((), (False, False), (False, False), (False, False), (False, True))
assert d.o2_sensors_alt(m("4100" + "0F")) == ((), (False, False), (False, False), (True, True), (True, True))
assert d.o2_sensors_alt(m("4100" + "F0")) == ((), (True, True), (True, True), (False, False), (False, False))
def test_aux_input_status():
assert d.aux_input_status(m("4100" + "00")) is False
assert d.aux_input_status(m("4100" + "80")) is True
def test_absolute_load():
assert d.absolute_load(m("4100" + "0000")) == 0 * Unit.percent
assert d.absolute_load(m("4100" + "FFFF")) == 25700 * Unit.percent
def test_elm_voltage():
# these aren't parsed as standard hex messages, so manufacture our own
assert d.elm_voltage([Message([Frame("12.875")])]) == 12.875 * Unit.volt
assert d.elm_voltage([Message([Frame("12")])]) == 12 * Unit.volt
assert d.elm_voltage([Message([Frame(u"12.3V")])]) == 12.3 * Unit.volt
assert d.elm_voltage([Message([Frame("12ABCD")])]) is None
def test_status():
status = d.status(m("4100" + "8307FF00"))
assert status.MIL
assert status.DTC_count == 3
assert status.ignition_type == "spark"
for name in BASE_TESTS:
assert status.__dict__[name].available
assert status.__dict__[name].complete
# check that NONE of the compression tests are available
for name in COMPRESSION_TESTS:
if name and name not in SPARK_TESTS: # there's one test name in common between spark/compression
assert not status.__dict__[name].available
assert not status.__dict__[name].complete
# check that ALL of the spark tests are available
for name in SPARK_TESTS:
if name:
assert status.__dict__[name].available
assert status.__dict__[name].complete
# a different test
status = d.status(m("4100" + "00790303"))
assert not status.MIL
assert status.DTC_count == 0
assert status.ignition_type == "compression"
# availability
assert status.MISFIRE_MONITORING.available
assert not status.FUEL_SYSTEM_MONITORING.available
assert not status.COMPONENT_MONITORING.available
# completion
assert not status.MISFIRE_MONITORING.complete
assert not status.FUEL_SYSTEM_MONITORING.complete
assert not status.COMPONENT_MONITORING.complete
# check that NONE of the spark tests are available
for name in SPARK_TESTS:
if name and name not in COMPRESSION_TESTS:
assert not status.__dict__[name].available
assert not status.__dict__[name].complete
# availability
assert status.NMHC_CATALYST_MONITORING.available
assert status.NOX_SCR_AFTERTREATMENT_MONITORING.available
assert not status.BOOST_PRESSURE_MONITORING.available
assert not status.EXHAUST_GAS_SENSOR_MONITORING.available
assert not status.PM_FILTER_MONITORING.available
assert not status.EGR_VVT_SYSTEM_MONITORING.available
# completion
assert not status.NMHC_CATALYST_MONITORING.complete
assert not status.NOX_SCR_AFTERTREATMENT_MONITORING.complete
assert status.BOOST_PRESSURE_MONITORING.complete
assert status.EXHAUST_GAS_SENSOR_MONITORING.complete
assert status.PM_FILTER_MONITORING.complete
assert status.EGR_VVT_SYSTEM_MONITORING.complete
def test_single_dtc():
assert d.single_dtc(m("4100" + "0104")) == ("P0104", "Mass or Volume Air Flow Circuit Intermittent")
assert d.single_dtc(m("4100" + "4123")) == ("C0123", "") # reverse back into correct bit-order
assert d.single_dtc(m("4100" + "01")) is None
assert d.single_dtc(m("4100" + "010400")) is None
def test_dtc():
assert d.dtc(m("4100" + "0104")) == [
("P0104", "Mass or Volume Air Flow Circuit Intermittent"),
]
# multiple codes
assert d.dtc(m("4100" + "010480034123")) == [
("P0104", "Mass or Volume Air Flow Circuit Intermittent"),
("B0003", ""), # unknown error codes return empty strings
("C0123", ""),
]
# invalid code lengths are dropped
assert d.dtc(m("4100" + "0104800341")) == [
("P0104", "Mass or Volume Air Flow Circuit Intermittent"),
("B0003", ""),
]
# 0000 codes are dropped
assert d.dtc(m("4100" + "000001040000")) == [
("P0104", "Mass or Volume Air Flow Circuit Intermittent"),
]
# test multiple messages
assert d.dtc(m("4100" + "0104") + m("4100" + "8003") + m("4100" + "0000")) == [
("P0104", "Mass or Volume Air Flow Circuit Intermittent"),
("B0003", ""),
]
def test_vin_message_count():
assert d.count(m("0901")) == 0
def test_vin():
assert d.encoded_string(17)(m("0201575030" + "5A5A5A39395A54" + "53333932313234")) == bytearray(b'WP0ZZZ99ZTS392124')
def test_cvn():
assert d.cvn(m("6021791bc8216e0b")) == '791bc8216e'
def test_monitor():
# single test -----------------------------------------
# [ test ]
v = d.monitor(m("41" + "01010A0BB00BB00BB0"))
assert len(v) == 1 # 1 test result
# make sure we can look things up by name and TID
assert v[0x01] == v.RTL_THRESHOLD_VOLTAGE == v["RTL_THRESHOLD_VOLTAGE"]
# make sure we got information
assert not v[0x01].is_null()
assert float_equals(v[0x01].value, 365 * Unit.millivolt)
assert float_equals(v[0x01].min, 365 * Unit.millivolt)
assert float_equals(v[0x01].max, 365 * Unit.millivolt)
# multiple tests --------------------------------------
# [ test ][ test ][ test ]
v = d.monitor(m("41" + "01010A0BB00BB00BB00105100048000000640185240096004BFFFF"))
assert len(v) == 3 # 3 test results
# make sure we can look things up by name and TID
assert v[0x01] == v.RTL_THRESHOLD_VOLTAGE == v["RTL_THRESHOLD_VOLTAGE"]
assert v[0x05] == v.RTL_SWITCH_TIME == v["RTL_SWITCH_TIME"]
# make sure we got information
assert not v[0x01].is_null()
assert not v[0x05].is_null()
assert not v[0x85].is_null()
assert float_equals(v[0x01].value, 365 * Unit.millivolt)
assert float_equals(v[0x01].min, 365 * Unit.millivolt)
assert float_equals(v[0x01].max, 365 * Unit.millivolt)
assert float_equals(v[0x05].value, 72 * Unit.millisecond)
assert float_equals(v[0x05].min, 0 * Unit.millisecond)
assert float_equals(v[0x05].max, 100 * Unit.millisecond)
assert float_equals(v[0x85].value, 150 * Unit.count)
assert float_equals(v[0x85].min, 75 * Unit.count)
assert float_equals(v[0x85].max, 65535 * Unit.count)
# truncate incomplete tests ----------------------------
# [ test ][junk]
v = d.monitor(m("41" + "01010A0BB00BB00BB0ABCDEF"))
assert len(v) == 1 # 1 test result
# make sure we can look things up by name and TID
assert v[0x01] == v.RTL_THRESHOLD_VOLTAGE == v["RTL_THRESHOLD_VOLTAGE"]
# make sure we got information
assert not v[0x01].is_null()
assert float_equals(v[0x01].value, 365 * Unit.millivolt)
assert float_equals(v[0x01].min, 365 * Unit.millivolt)
assert float_equals(v[0x01].max, 365 * Unit.millivolt)
# truncate incomplete tests ----------------------------
v = d.monitor(m("41" + "01010A0BB00BB00B"))
assert len(v) == 0 # no valid tests
# make sure that the standard tests are null
for tid in TEST_IDS:
assert v[tid].is_null()