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
|
# vim: set fileencoding=utf-8:
#
# GPIO Zero: a library for controlling the Raspberry Pi's GPIO pins
#
# Copyright (c) 2016-2021 Dave Jones <dave@waveform.org.uk>
# Copyright (c) 2019 Andrew Scheller <github@loowis.durge.org>
#
# SPDX-License-Identifier: BSD-3-Clause
from __future__ import (
unicode_literals,
absolute_import,
print_function,
division,
)
nstr = str
str = type('')
import io
import sys
import pytest
from array import array
from mock import patch
from collections import namedtuple
from gpiozero.pins.native import NativeFactory
from gpiozero.pins.local import (
LocalPiHardwareSPI,
LocalPiSoftwareSPI,
LocalPiHardwareSPIShared,
LocalPiSoftwareSPIShared,
)
from gpiozero.pins.mock import MockSPIDevice
from gpiozero import *
def test_spi_hardware_params(mock_factory):
with patch('gpiozero.pins.local.SpiDev'):
with mock_factory.spi() as device:
assert isinstance(device, LocalPiHardwareSPI)
assert repr(device) == 'SPI(port=0, device=0)'
device.close()
assert device.closed
assert repr(device) == 'SPI(closed)'
with mock_factory.spi(port=0, device=0) as device:
assert isinstance(device, LocalPiHardwareSPI)
with mock_factory.spi(port=0, device=1) as device:
assert isinstance(device, LocalPiHardwareSPI)
with mock_factory.spi(clock_pin=11) as device:
assert isinstance(device, LocalPiHardwareSPI)
with mock_factory.spi(clock_pin=11, mosi_pin=10, select_pin=8) as device:
assert isinstance(device, LocalPiHardwareSPI)
with mock_factory.spi(clock_pin=11, mosi_pin=10, select_pin=7) as device:
assert isinstance(device, LocalPiHardwareSPI)
# Ensure we support "partial" SPI where we don't reserve a pin because
# the device wants it for general IO (see SPI screens which use a pin
# for data/commands)
with mock_factory.spi(clock_pin=11, mosi_pin=10, miso_pin=None, select_pin=7) as device:
assert isinstance(device, LocalPiHardwareSPI)
with mock_factory.spi(clock_pin=11, mosi_pin=None, miso_pin=9, select_pin=7) as device:
assert isinstance(device, LocalPiHardwareSPI)
with mock_factory.spi(shared=True) as device:
assert isinstance(device, LocalPiHardwareSPIShared)
with pytest.raises(ValueError):
mock_factory.spi(port=1)
with pytest.raises(ValueError):
mock_factory.spi(device=2)
with pytest.raises(ValueError):
mock_factory.spi(port=0, clock_pin=12)
with pytest.raises(ValueError):
mock_factory.spi(foo='bar')
def test_spi_software_params(mock_factory):
with patch('gpiozero.pins.local.SpiDev'):
with mock_factory.spi(select_pin=6) as device:
assert isinstance(device, LocalPiSoftwareSPI)
assert repr(device) == 'SPI(clock_pin=11, mosi_pin=10, miso_pin=9, select_pin=6)'
device.close()
assert device.closed
assert repr(device) == 'SPI(closed)'
with mock_factory.spi(clock_pin=11, mosi_pin=9, miso_pin=10) as device:
assert isinstance(device, LocalPiSoftwareSPI)
device._bus.close()
assert device._bus.closed
device.close()
assert device.closed
with mock_factory.spi(select_pin=6, shared=True) as device:
assert isinstance(device, LocalPiSoftwareSPIShared)
with patch('gpiozero.pins.local.SpiDev', None):
# Clear out the old factory's caches (this is only necessary
# because we're being naughty switching out patches)
mock_factory.pins.clear()
mock_factory._reservations.clear()
# Ensure software fallback works when SpiDev isn't present
with mock_factory.spi() as device:
assert isinstance(device, LocalPiSoftwareSPI)
def test_spi_hardware_conflict(mock_factory):
with patch('gpiozero.pins.local.SpiDev') as spidev:
with LED(11) as led:
with pytest.raises(GPIOPinInUse):
mock_factory.spi(port=0, device=0)
with patch('gpiozero.pins.local.SpiDev') as spidev:
with mock_factory.spi(port=0, device=0) as spi:
with pytest.raises(GPIOPinInUse):
LED(11)
def test_spi_software_same_bus(mock_factory):
with patch('gpiozero.pins.local.SpiDev'):
with mock_factory.spi(select_pin=6) as device:
with pytest.raises(GPIOPinInUse):
mock_factory.spi(select_pin=6)
with mock_factory.spi(select_pin=5) as another_device:
assert device._bus is another_device._bus
def test_spi_software_shared_bus(mock_factory):
with patch('gpiozero.pins.local.SpiDev'):
with mock_factory.spi(select_pin=6, shared=True) as device:
with mock_factory.spi(select_pin=6, shared=True) as another_device:
assert device is another_device
def test_spi_hardware_read(mock_factory):
with patch('gpiozero.pins.local.SpiDev') as spidev:
spidev.return_value.xfer2.side_effect = lambda data: list(range(10))[:len(data)]
with mock_factory.spi() as device:
assert device.read(3) == [0, 1, 2]
assert device.read(6) == list(range(6))
def test_spi_hardware_write(mock_factory):
with patch('gpiozero.pins.local.SpiDev') as spidev:
spidev.return_value.xfer2.side_effect = lambda data: list(range(10))[:len(data)]
with mock_factory.spi() as device:
assert device.write([0, 1, 2]) == 3
assert spidev.return_value.xfer2.called_with([0, 1, 2])
assert device.write(list(range(6))) == 6
assert spidev.return_value.xfer2.called_with(list(range(6)))
def test_spi_hardware_modes(mock_factory):
with patch('gpiozero.pins.local.SpiDev') as spidev:
spidev.return_value.mode = 0
spidev.return_value.lsbfirst = False
spidev.return_value.cshigh = True
spidev.return_value.bits_per_word = 8
with mock_factory.spi() as device:
assert device.clock_mode == 0
assert not device.clock_polarity
assert not device.clock_phase
device.clock_polarity = False
assert device.clock_mode == 0
device.clock_polarity = True
assert device.clock_mode == 2
device.clock_phase = True
assert device.clock_mode == 3
assert not device.lsb_first
assert device.select_high
assert device.bits_per_word == 8
device.select_high = False
device.lsb_first = True
device.bits_per_word = 12
assert not spidev.return_value.cshigh
assert spidev.return_value.lsbfirst
assert spidev.return_value.bits_per_word == 12
device.rate = 1000000
assert device.rate == 1000000
device.rate = 500000
assert device.rate == 500000
def test_spi_software_read(mock_factory):
class SPISlave(MockSPIDevice):
def on_start(self):
super(SPISlave, self).on_start()
for i in range(10):
self.tx_word(i)
with patch('gpiozero.pins.local.SpiDev', None), \
SPISlave(11, 10, 9, 8) as slave, \
mock_factory.spi() as master:
assert master.read(3) == [0, 1, 2]
assert master.read(6) == [0, 1, 2, 3, 4, 5]
slave.clock_phase = True
master.clock_phase = True
assert master.read(3) == [0, 1, 2]
assert master.read(6) == [0, 1, 2, 3, 4, 5]
def test_spi_software_write(mock_factory):
with patch('gpiozero.pins.local.SpiDev', None), \
MockSPIDevice(11, 10, 9, 8) as test_device, \
mock_factory.spi() as master:
master.write([0])
assert test_device.rx_word() == 0
master.write([2, 0])
# 0b 0000_0010 0000_0000
assert test_device.rx_word() == 512
master.write([0, 1, 1])
# 0b 0000_0000 0000_0001 0000_0001
assert test_device.rx_word() == 257
def test_spi_software_write_lsb_first(mock_factory):
with patch('gpiozero.pins.local.SpiDev', None), \
MockSPIDevice(11, 10, 9, 8, lsb_first=True) as test_device, \
mock_factory.spi() as master:
# lsb_first means the bit-strings above get reversed
master.write([0])
assert test_device.rx_word() == 0
master.write([2, 0])
# 0b 0000_0000 0100_0000
assert test_device.rx_word() == 64
master.write([0, 1, 1])
# 0b 1000_0000 1000_0000 0000_0000
assert test_device.rx_word() == 8421376
def test_spi_software_clock_mode(mock_factory):
with patch('gpiozero.pins.local.SpiDev', None), \
mock_factory.spi() as master:
assert master.clock_mode == 0
assert not master.clock_polarity
assert not master.clock_phase
master.clock_polarity = False
assert master.clock_mode == 0
master.clock_polarity = True
assert master.clock_mode == 2
master.clock_phase = True
assert master.clock_mode == 3
master.clock_mode = 0
assert not master.clock_polarity
assert not master.clock_phase
with pytest.raises(ValueError):
master.clock_mode = 5
def test_spi_software_attr(mock_factory):
with patch('gpiozero.pins.local.SpiDev', None), \
mock_factory.spi() as master:
assert not master.lsb_first
assert not master.select_high
assert master.bits_per_word == 8
master.bits_per_word = 12
assert master.bits_per_word == 12
master.lsb_first = True
assert master.lsb_first
master.select_high = True
assert master.select_high
with pytest.raises(ValueError):
master.bits_per_word = 0
# XXX Test two simultaneous SPI devices sharing clock, MOSI, and MISO, with
# separate select pins (including threaded tests which attempt simultaneous
# reading/writing)
|
