-
Notifications
You must be signed in to change notification settings - Fork 408
/
Copy pathtest_frame_encoding.py
206 lines (172 loc) · 6.93 KB
/
test_frame_encoding.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
# -*- coding: utf-8 -*-
import io
# import os.path
import textwrap
import attr
import canmatrix.formats
def load_dbc():
test_file = "tests/files/dbc/test_frame_decoding.dbc"
return canmatrix.formats.loadp_flat(test_file)
def test_encode_with_dbc_big_endian():
cm = load_dbc()
# 002#0C00057003CD1F83
frame = cm.frame_by_id(canmatrix.ArbitrationId(1))
to_encode = dict()
to_encode["sig0"] = 1
to_encode["sig1"] = 35
to_encode["sig2"] = 0
to_encode["sig3"] = 2048
to_encode["sig4"] = 256
to_encode["sig5"] = 1
to_encode["sig6"] = 0
to_encode["sig7"] = 520
to_encode["sig8"] = 0
to_encode["sig9"] = 0
to_encode["sig10"] = 0
frame_data = frame.encode(to_encode)
assert frame_data == bytearray([141, 0, 16, 1, 0, 130, 1, 0])
def test_encode_with_dbc_little_endian():
cm = load_dbc()
# 002#0C00057003CD1F83
frame = cm.frame_by_id(canmatrix.ArbitrationId(2))
to_encode = dict()
to_encode["secSig1"] = 0
to_encode["secSig2"] = 0
to_encode["secSig3"] = 0
to_encode["secSig4"] = 2
to_encode["secSig5"] = 0
to_encode["secSig6"] = 0
to_encode["secSig7"] = 0
to_encode["secSig8"] = 3
to_encode["secSig9"] = 1
to_encode["secSig10"] = 1280
to_encode["secSig11"] = -144
to_encode["secSig12"] = 12
frame_data = frame.encode(to_encode)
assert frame_data == bytearray([0x0c, 0x00, 0x05, 0x70, 0x03, 0x00, 0x10, 0x83])
def test_encode_with_dbc_float():
cm = load_dbc()
# 003#38638A7E58A8C540
frame = cm.frame_by_id(canmatrix.ArbitrationId(3))
to_encode = dict()
to_encode["floatSignal1"] = 5.424999835668132e-05
to_encode["floatSignal2"] = 6.176799774169922
frame_data = frame.encode(to_encode)
assert frame_data == bytearray([0x38, 0x63, 0x8A, 0x7E, 0x58, 0xA8, 0xC5, 0x40])
def test_encode_with_dbc_multiplex():
cm = load_dbc()
frame = cm.frame_by_id(canmatrix.ArbitrationId(4))
to_encode1 = dict()
to_encode1["myMuxer"] = 0
to_encode1["muxSig9"] = 0x20
to_encode1["muxSig1"] = 0x38
to_encode1["muxSig2"] = 0x63
to_encode1["muxSig3"] = 0x8A
to_encode1["muxSig4"] = 0x3F
frame_data1 = frame.encode(to_encode1)
assert frame_data1 == bytearray([0x38, 0x63, 0x8A, 0x7E, 0x00, 0x20, 0x00])
to_encode2 = dict()
to_encode2["myMuxer"] = 1
to_encode2["muxSig9"] = 0x20
to_encode2["muxSig5"] = -6
to_encode2["muxSig6"] = 0x18
to_encode2["muxSig7"] = 0x0C
to_encode2["muxSig8"] = -8
frame_data2 = frame.encode(to_encode2)
assert frame_data2 == bytearray([0x38, 0x60, 0x80, 0x1E, 0x18, 0x20, 0x20])
def test_sym():
"""Test signal and frame encoding based on a .sym file
The symbol file was created using the PCAN Symbol Editor. The reference
transmissions were created using PCAN Explorer. The result message bytes
were observed in PCAN-View.
PCAN Symbol Editor v3.1.6.342
PCAN Explorer v5.3.4.823
PCAN-View v4.2.1.533
"""
s = textwrap.dedent(
u'''\
FormatVersion=5.0 // Do not edit this line!
Title="Untitled"
{SENDRECEIVE}
[Unsigned]
ID=000h
DLC=7
Var=two_bit_big_endian unsigned 33,2 -m
Var=two_bit_little_endian unsigned 30,2
Var=seven_bit_big_endian unsigned 4,7 -m
Var=seven_bit_little_endian unsigned 5,7
Var=eleven_bit_big_endian unsigned 35,11 -m
Var=eleven_bit_little_endian unsigned 18,11
[Signed]
ID=001h
DLC=7
Var=two_bit_big_endian signed 33,2 -m
Var=two_bit_little_endian signed 30,2
Var=seven_bit_big_endian signed 4,7 -m
Var=seven_bit_little_endian signed 5,7
Var=eleven_bit_big_endian signed 35,11 -m
Var=eleven_bit_little_endian signed 18,11
''',
)
f = io.BytesIO(s.encode('utf-8'))
matrix = canmatrix.formats.load_flat(f, import_type='sym')
unsigned_frame = matrix.frame_by_name('Unsigned')
signed_frame = matrix.frame_by_name('Signed')
@attr.s(frozen=True)
class TestFrame(object):
two_bit_big_endian = attr.ib(default=0)
two_bit_little_endian = attr.ib(default=0)
seven_bit_big_endian = attr.ib(default=0)
seven_bit_little_endian = attr.ib(default=0)
eleven_bit_big_endian = attr.ib(default=0)
eleven_bit_little_endian = attr.ib(default=0)
def encode(self, frame_to_encode):
return frame_to_encode.encode(attr.asdict(self))
unsigned_cases = {
TestFrame(): b'\x00\x00\x00\x00\x00\x00\x00',
TestFrame(two_bit_big_endian=1): b'\x00\x00\x00\x00\x20\x00\x00',
TestFrame(two_bit_big_endian=2): b'\x00\x00\x00\x00\x40\x00\x00',
TestFrame(two_bit_little_endian=1): b'\x00\x00\x00\x40\x00\x00\x00',
TestFrame(two_bit_little_endian=2): b'\x00\x00\x00\x80\x00\x00\x00',
TestFrame(seven_bit_big_endian=1): b'\x00\x20\x00\x00\x00\x00\x00',
TestFrame(seven_bit_big_endian=64): b'\x08\x00\x00\x00\x00\x00\x00',
TestFrame(seven_bit_little_endian=1): b'\x20\x00\x00\x00\x00\x00\x00',
TestFrame(seven_bit_little_endian=64): b'\x00\x08\x00\x00\x00\x00\x00',
TestFrame(eleven_bit_big_endian=1): b'\x00\x00\x00\x00\x00\x04\x00',
TestFrame(eleven_bit_big_endian=1024): b'\x00\x00\x00\x00\x10\x00\x00',
TestFrame(eleven_bit_little_endian=1): b'\x00\x00\x04\x00\x00\x00\x00',
TestFrame(eleven_bit_little_endian=1024): (
b'\x00\x00\x00\x10\x00\x00\x00'
),
}
signed_cases = {
TestFrame(): b'\x00\x00\x00\x00\x00\x00\x00',
TestFrame(two_bit_big_endian=1): b'\x00\x00\x00\x00\x20\x00\x00',
TestFrame(two_bit_big_endian=-2): b'\x00\x00\x00\x00\x40\x00\x00',
TestFrame(two_bit_little_endian=1): b'\x00\x00\x00\x40\x00\x00\x00',
TestFrame(two_bit_little_endian=-2): b'\x00\x00\x00\x80\x00\x00\x00',
TestFrame(seven_bit_big_endian=1): b'\x00\x20\x00\x00\x00\x00\x00',
TestFrame(seven_bit_big_endian=-2): b'\x0F\xC0\x00\x00\x00\x00\x00',
TestFrame(seven_bit_little_endian=1): b'\x20\x00\x00\x00\x00\x00\x00',
TestFrame(seven_bit_little_endian=-2): b'\xC0\x0F\x00\x00\x00\x00\x00',
TestFrame(eleven_bit_big_endian=1): b'\x00\x00\x00\x00\x00\x04\x00',
TestFrame(eleven_bit_big_endian=-2): b'\x00\x00\x00\x00\x1F\xF8\x00',
TestFrame(eleven_bit_little_endian=1): b'\x00\x00\x04\x00\x00\x00\x00',
TestFrame(eleven_bit_little_endian=-2): (
b'\x00\x00\xF8\x1F\x00\x00\x00'
),
}
def h(b):
return ' '.join('{:02X}'.format(c) for c in b)
frame_case_pairs = (
(unsigned_frame, unsigned_cases),
(signed_frame, signed_cases),
)
for frame, cases in frame_case_pairs:
for test_frame, expected in cases.items():
expected = bytearray(expected)
encoded = test_frame.encode(frame)
print(test_frame)
print(h(encoded))
print(h(expected))
assert encoded == expected