def test_the_homer(self):
db = cantools.db.load_file('tests/files/kcd/the_homer.kcd')
self.assertEqual(db.messages[1].signal_tree, [{
'ABS_InfoMux': {
0: ['Info0', 'Info1'],
1: ['Info2', 'Info3'],
2: ['Info4', 'Info5'],
3: ['Info6', 'Info7']
}
}, 'OutsideTemp', 'SpeedKm', 'Handbrake'])
self.assertEqual(
formatting.signal_tree_string(db.messages[1]), '-- {root}\n'
' +-- ABS_InfoMux\n'
' | +-- 0\n'
' | | +-- Info0\n'
' | | +-- Info1\n'
' | +-- 1\n'
' | | +-- Info2\n'
' | | +-- Info3\n'
' | +-- 2\n'
' | | +-- Info4\n'
' | | +-- Info5\n'
' | +-- 3\n'
' | +-- Info6\n'
' | +-- Info7\n'
' +-- OutsideTemp\n'
' +-- SpeedKm\n'
' +-- Handbrake')
def test_multiplex_choices(self):
db = cantools.db.load_file('tests/files/dbc/multiplex_choices.dbc')
message_1 = db.messages[0]
self.assertEqual(
formatting.signal_choices_string(message_1), '\n'
'Multiplexor\n'
' 8 MULTIPLEXOR_8\n'
' 16 MULTIPLEXOR_16\n'
' 24 MULTIPLEXOR_24\n'
'\n'
'BIT_L\n'
' 0 Off\n'
' 1 On')
message_2 = db.messages[1]
self.assertEqual(
formatting.signal_tree_string(message_2), '-- {root}\n'
' +-- Multiplexor\n'
' +-- MULTIPLEXOR_4_NO_SIGNALS (4)\n'
' +-- MULTIPLEXOR_8 (8)\n'
' | +-- BIT_J\n'
' | +-- BIT_C\n'
' | +-- BIT_G\n'
' | +-- BIT_L\n'
' +-- MULTIPLEXOR_16 (16)\n'
' | +-- BIT_J\n'
' | +-- BIT_C\n'
' | +-- BIT_G\n'
' | +-- BIT_L\n'
' +-- MULTIPLEXOR_24 (24)\n'
' +-- BIT_J\n'
' +-- BIT_C\n'
' +-- BIT_G\n'
' +-- BIT_L\n'
' +-- BIT_A\n'
' +-- BIT_K\n'
' +-- BIT_E\n'
' +-- BIT_D\n'
' +-- BIT_B\n'
' +-- BIT_H\n'
' +-- BIT_F')
def test_multiplex(self):
db = cantools.db.load_file('tests/files/dbc/multiplex.dbc')
message_1 = db.messages[0]
self.assertEqual(message_1.signal_tree, [{
'Multiplexor': {
8: ['BIT_J', 'BIT_C', 'BIT_G', 'BIT_L'],
16: ['BIT_J', 'BIT_C', 'BIT_G', 'BIT_L'],
24: [
'BIT_J', 'BIT_C', 'BIT_G', 'BIT_L', 'BIT_A', 'BIT_K',
'BIT_E', 'BIT_D', 'BIT_B', 'BIT_H', 'BIT_F'
]
}
}])
self.assertEqual(
formatting.signal_tree_string(message_1), '-- {root}\n'
' +-- Multiplexor\n'
' +-- 8\n'
' | +-- BIT_J\n'
' | +-- BIT_C\n'
' | +-- BIT_G\n'
' | +-- BIT_L\n'
' +-- 16\n'
' | +-- BIT_J\n'
' | +-- BIT_C\n'
' | +-- BIT_G\n'
' | +-- BIT_L\n'
' +-- 24\n'
' +-- BIT_J\n'
' +-- BIT_C\n'
' +-- BIT_G\n'
' +-- BIT_L\n'
' +-- BIT_A\n'
' +-- BIT_K\n'
' +-- BIT_E\n'
' +-- BIT_D\n'
' +-- BIT_B\n'
' +-- BIT_H\n'
' +-- BIT_F')
def test_multiplex_extended(self):
# tree | bits
# =============================+========
# -- {root} |
# +-- S0 | 0..4
# | +-- 0 |
# | | +-- S1 | 4..8
# | | +-- 0 |
# | | | +-- S2 | 8..16
# | | | +-- S3 | 16..32
# | | +-- 2 |
# | | +-- S4 | 8..32
# | +-- 1 |
# | +-- S5 | 4..32
# +-- S6 | 32..40
# +-- 1 |
# | +-- S7 | 40..64
# +-- 2 |
# +-- S8 | 40..48
#
signals = [
cantools.db.Signal(name='S0',
start=0,
length=4,
is_multiplexer=True),
cantools.db.Signal(name='S1',
start=4,
length=4,
is_multiplexer=True,
multiplexer_ids=[0],
multiplexer_signal='S0'),
cantools.db.Signal(name='S2',
start=8,
length=8,
multiplexer_ids=[0],
multiplexer_signal='S1'),
cantools.db.Signal(name='S3',
start=16,
length=16,
multiplexer_ids=[0],
multiplexer_signal='S1'),
cantools.db.Signal(name='S4',
start=8,
length=24,
multiplexer_ids=[2],
multiplexer_signal='S1'),
cantools.db.Signal(name='S5',
start=4,
length=28,
multiplexer_ids=[1],
multiplexer_signal='S0'),
cantools.db.Signal(name='S6',
start=32,
length=8,
is_multiplexer=True),
cantools.db.Signal(name='S7',
start=40,
length=24,
multiplexer_ids=[1],
multiplexer_signal='S6'),
cantools.db.Signal(name='S8',
start=40,
length=8,
multiplexer_ids=[2],
multiplexer_signal='S6')
]
message = cantools.db.Message(frame_id=1,
name='M0',
length=8,
signals=signals)
self.assertEqual(message.signal_tree, [{
'S0': {
0: [{
'S1': {
0: ['S2', 'S3'],
2: ['S4']
}
}],
1: ['S5']
}
}, {
'S6': {
1: ['S7'],
2: ['S8']
}
}])
self.assertEqual(
formatting.signal_tree_string(message), '-- {root}\n'
' +-- S0\n'
' | +-- 0\n'
' | | +-- S1\n'
' | | +-- 0\n'
' | | | +-- S2\n'
' | | | +-- S3\n'
' | | +-- 2\n'
' | | +-- S4\n'
' | +-- 1\n'
' | +-- S5\n'
' +-- S6\n'
' +-- 1\n'
' | +-- S7\n'
' +-- 2\n'
' +-- S8')