Add Protobuf Messages

[wsciaroni]

This adds a script that would be used to serialize the commands to and from the embedded device.

For this to be used we would need to add the probof library as a dependency for the project's builds.

This should allow for a more robust protocol and easy adoption for other projects regardless of language.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
2.8% Duplication on New Code

See analysis details on SonarQube Cloud

[wsciaroni]

Could be:

syntax = "proto3";

package audio_streaming;

enum MsgType {
  DATA = 0;
  CMD = 1;
}

enum CommandType {
  PTT_DOWN = 0;
  PTT_UP = 1;
  TUNE_TO = 2;
  FILTERS = 3;
  STOP = 4;
  GET_FIRMWARE_VER = 5;
}

message MsgHeader {
  MsgType type = 1;
}

message DataMsg {
  MsgHeader header = 1;
  bytes data = 2;
}

message TxCmdMsg {
  MsgHeader header = 1;
  CommandType command = 2;
}

message RxCmdMsg {
  MsgHeader header = 1;
  CommandType command = 2;
}

message TuneCmdMsg {
  MsgHeader header = 1;
  CommandType command = 2;
  uint64 txfreq = 3;
  uint64 rxfreq = 4;
}

message FiltersCmdMsg {
  MsgHeader header = 1;
  CommandType command = 2;
  bool emphasis = 3;
  bool highpass = 4;
  bool lowpass = 5;
}

message StopCmdMsg {
  MsgHeader header = 1;
  CommandType command = 2;
}

message GetFirmwareVerCmdMsg {
  MsgHeader header = 1;
  CommandType command = 2;
}

message FirmwareVersion {
  string version = 1;
}

enum AckType {
  WILCO = 0;
  CANTCO = 1;
}

message Ack {
  AckType type = 1;
  string error_message = 2;
}