pw_unit_test: Add RPC service
This implements an RPC service that streams pw_unit_test events, as well
as a unit test main that initializes a server with the test service
registered and an HDLC serial channel.
Change-Id: I6c66f2216c54d82aa70c351d7d3d99d9a5c173de
Reviewed-on: https://pigweed-review.googlesource.com/c/pigweed/pigweed/+/23901
Commit-Queue: Alexei Frolov <frolv@google.com>
Reviewed-by: Keir Mierle <keir@google.com>
diff --git a/pw_unit_test/rpc_main.cc b/pw_unit_test/rpc_main.cc
new file mode 100644
index 0000000..04a70ad
--- /dev/null
+++ b/pw_unit_test/rpc_main.cc
@@ -0,0 +1,67 @@
+// Copyright 2020 The Pigweed Authors
+//
+// Licensed under the Apache License, Version 2.0 (the "License"); you may not
+// use this file except in compliance with the License. You may obtain a copy of
+// the License at
+//
+// https://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+// License for the specific language governing permissions and limitations under
+// the License.
+
+#include "pw_hdlc_lite/encoder.h"
+#include "pw_hdlc_lite/rpc_channel.h"
+#include "pw_hdlc_lite/rpc_packets.h"
+#include "pw_hdlc_lite/sys_io_stream.h"
+#include "pw_log/log.h"
+#include "pw_unit_test/framework.h"
+#include "pw_unit_test/unit_test_service.h"
+
+// TODO(frolv): This file is largely copied from the HDLC RPC example. It should
+// be updated to use the system RPC server facade when that is ready.
+
+namespace pw {
+namespace {
+
+constexpr size_t kMaxTransmissionUnit = 256;
+
+// Used to write HDLC data to pw::sys_io.
+stream::SysIoWriter writer;
+
+// Set up the output channel for the pw_rpc server to use to use.
+hdlc_lite::RpcChannelOutputBuffer<kMaxTransmissionUnit> hdlc_channel_output(
+ writer, hdlc_lite::kDefaultRpcAddress, "HDLC channel");
+
+rpc::Channel channels[] = {rpc::Channel::Create<1>(&hdlc_channel_output)};
+
+// Declare the pw_rpc server with the HDLC channel.
+rpc::Server server(channels);
+
+unit_test::UnitTestService unit_test_service;
+
+void RegisterServices() { server.RegisterService(unit_test_service); }
+
+} // namespace
+
+extern "C" int main() {
+ // Send log messages to HDLC address 1. This prevents logs from interfering
+ // with pw_rpc communications.
+ log_basic::SetOutput([](std::string_view log) {
+ hdlc_lite::WriteInformationFrame(1, std::as_bytes(std::span(log)), writer);
+ });
+
+ RegisterServices();
+
+ // Declare a buffer for decoding incoming HDLC frames.
+ std::array<std::byte, kMaxTransmissionUnit> input_buffer;
+
+ PW_LOG_INFO("Starting pw_rpc server");
+ hdlc_lite::ReadAndProcessPackets(server, hdlc_channel_output, input_buffer);
+
+ return 0;
+}
+
+} // namespace pw