You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
71 lines
2.1 KiB
71 lines
2.1 KiB
// 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 <cstddef>
|
|
|
|
#include "pw_hdlc/rpc_channel.h"
|
|
#include "pw_hdlc/rpc_packets.h"
|
|
#include "pw_log/log.h"
|
|
#include "pw_rpc_system_server/rpc_server.h"
|
|
#include "pw_stream/sys_io_stream.h"
|
|
|
|
namespace pw::rpc::system_server {
|
|
namespace {
|
|
|
|
constexpr size_t kMaxTransmissionUnit = 256;
|
|
|
|
// Used to write HDLC data to pw::sys_io.
|
|
stream::SysIoWriter writer;
|
|
stream::SysIoReader reader;
|
|
|
|
// Set up the output channel for the pw_rpc server to use.
|
|
hdlc::RpcChannelOutputBuffer<kMaxTransmissionUnit> hdlc_channel_output(
|
|
writer, pw::hdlc::kDefaultRpcAddress, "HDLC channel");
|
|
Channel channels[] = {pw::rpc::Channel::Create<1>(&hdlc_channel_output)};
|
|
rpc::Server server(channels);
|
|
|
|
} // namespace
|
|
|
|
void Init() {
|
|
// Send log messages to HDLC address 1. This prevents logs from interfering
|
|
// with pw_rpc communications.
|
|
pw::log_basic::SetOutput([](std::string_view log) {
|
|
pw::hdlc::WriteUIFrame(1, std::as_bytes(std::span(log)), writer);
|
|
});
|
|
}
|
|
|
|
rpc::Server& Server() { return server; }
|
|
|
|
Status Start() {
|
|
// Declare a buffer for decoding incoming HDLC frames.
|
|
std::array<std::byte, kMaxTransmissionUnit> input_buffer;
|
|
hdlc::Decoder decoder(input_buffer);
|
|
|
|
while (true) {
|
|
std::byte byte;
|
|
Status ret_val = pw::sys_io::ReadByte(&byte);
|
|
if (!ret_val.ok()) {
|
|
return ret_val;
|
|
}
|
|
if (auto result = decoder.Process(byte); result.ok()) {
|
|
hdlc::Frame& frame = result.value();
|
|
if (frame.address() == hdlc::kDefaultRpcAddress) {
|
|
server.ProcessPacket(frame.data(), hdlc_channel_output);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
} // namespace pw::rpc::system_server
|