1 // Copyright 2021 The Pigweed Authors
2 //
3 // Licensed under the Apache License, Version 2.0 (the "License"); you may not
4 // use this file except in compliance with the License. You may obtain a copy of
5 // the License at
6 //
7 // https://www.apache.org/licenses/LICENSE-2.0
8 //
9 // Unless required by applicable law or agreed to in writing, software
10 // distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
11 // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
12 // License for the specific language governing permissions and limitations under
13 // the License.
14
15 #include <array>
16 #include <optional>
17
18 #include "gtest/gtest.h"
19 #include "pw_spi/chip_selector.h"
20 #include "pw_spi/device.h"
21 #include "pw_spi/initiator.h"
22 #include "pw_status/status.h"
23 #include "pw_sync/borrow.h"
24 #include "pw_sync/mutex.h"
25
26 namespace pw::spi {
27 namespace {
28
29 const pw::spi::Config kConfig = {.polarity = ClockPolarity::kActiveHigh,
30 .phase = ClockPhase::kFallingEdge,
31 .bits_per_word = BitsPerWord(8),
32 .bit_order = BitOrder::kMsbFirst};
33
34 class SpiTestDevice : public ::testing::Test {
35 public:
SpiTestDevice()36 SpiTestDevice()
37 : initiator_(),
38 chip_selector_(),
39 initiator_lock_(),
40 borrowable_initiator_(initiator_, initiator_lock_),
41 device_(borrowable_initiator_, kConfig, chip_selector_) {}
42
43 private:
44 // Stub SPI Initiator/ChipSelect objects, used to exercise public API surface.
45 class TestInitiator : public Initiator {
46 public:
Configure(const Config &)47 Status Configure(const Config& /*config */) override { return OkStatus(); }
WriteRead(ConstByteSpan,ByteSpan)48 Status WriteRead(ConstByteSpan /* write_buffer */,
49 ByteSpan /* read_buffer */) override {
50 return OkStatus();
51 }
52 };
53
54 class TestChipSelector : public ChipSelector {
55 public:
SetActive(bool)56 Status SetActive(bool /*active*/) override { return OkStatus(); }
57 };
58
59 TestInitiator initiator_;
60 TestChipSelector chip_selector_;
61 sync::VirtualMutex initiator_lock_;
62 sync::Borrowable<Initiator> borrowable_initiator_;
63 Device device_;
64 };
65
66 // Simple test ensuring the SPI HAL compiles
TEST_F(SpiTestDevice,CompilationSucceeds)67 TEST_F(SpiTestDevice, CompilationSucceeds) {
68 // arrange
69 // act
70 // assert
71 EXPECT_TRUE(true);
72 }
73
74 } // namespace
75 } // namespace pw::spi
76