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// Copyright 2021 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 <array>
#include <cstddef>
#include <cstdint>
#include <cstdio>
#include "pw_assert/check.h"
#include "pw_hdlc/rpc_channel.h"
#include "pw_hdlc/rpc_packets.h"
#include "pw_log/log.h"
#include "pw_sync/mutex.h"
#include "pw_system/config.h"
#include "pw_system/io.h"
#include "pw_system/rpc_server.h"
namespace pw::system {
namespace {
constexpr size_t kMaxTransmissionUnit = PW_SYSTEM_MAX_TRANSMISSION_UNIT;
hdlc::RpcChannelOutput hdlc_channel_output(GetWriter(),
PW_SYSTEM_DEFAULT_RPC_HDLC_ADDRESS,
"HDLC channel");
rpc::Channel channels[] = {
rpc::Channel::Create<kDefaultRpcChannelId>(&hdlc_channel_output)};
rpc::Server server(channels);
// Declare a buffer for decoding incoming HDLC frames.
std::array<std::byte, kMaxTransmissionUnit> input_buffer;
hdlc::Decoder decoder(input_buffer);
std::array<std::byte, 1> data;
} // namespace
rpc::Server& GetRpcServer() { return server; }
class RpcDispatchThread final : public thread::ThreadCore {
public:
RpcDispatchThread() = default;
RpcDispatchThread(const RpcDispatchThread&) = delete;
RpcDispatchThread(RpcDispatchThread&&) = delete;
RpcDispatchThread& operator=(const RpcDispatchThread&) = delete;
RpcDispatchThread& operator=(RpcDispatchThread&&) = delete;
void Run() override {
PW_LOG_INFO("Running RPC server");
while (true) {
auto ret_val = GetReader().Read(data);
if (ret_val.ok()) {
for (std::byte byte : ret_val.value()) {
if (auto result = decoder.Process(byte); result.ok()) {
hdlc::Frame& frame = result.value();
if (frame.address() == PW_SYSTEM_DEFAULT_RPC_HDLC_ADDRESS) {
server.ProcessPacket(frame.data(), hdlc_channel_output);
}
}
}
}
}
}
};
thread::ThreadCore& GetRpcDispatchThread() {
static RpcDispatchThread rpc_dispatch_thread;
return rpc_dispatch_thread;
}
} // namespace pw::system