Creates a BattOrConnection for communicating with the BattOr

tools/battor_agent/battor_protocol_types.h

Index: tools/battor_agent/battor_protocol_types.h
diff --git a/tools/battor_agent/battor_protocol_types.h b/tools/battor_agent/battor_protocol_types.h
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+++ b/tools/battor_agent/battor_protocol_types.h
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+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef TOOLS_BATTOR_AGENT_BATTOR_PROTOCOL_H_
+#define TOOLS_BATTOR_AGENT_BATTOR_PROTOCOL_H_
+
+namespace battor {
+
+// Control characters in the BattOr protocol.
+enum BattOrControlByte : uint8_t {
+  // Indicates the start of a message in the protocol. All other instances of
+  // this byte must be escaped (with BATTOR_SPECIAL_BYTE_ESCAPE).
+  BATTOR_CONTROL_BYTE_START = 0x00,
+  // Indicates the end of a message in the protocol. All other instances of
+  // this byte must be escaped (with BATTOR_SPECIAL_BYTE_ESCAPE).
+  BATTOR_CONTROL_BYTE_END = 0x01,
+  // Indicates that the next byte should not be interpreted as a special
+  // character, but should instead be interpreted as itself.
+  BATTOR_CONTROL_BYTE_ESCAPE = 0x02,
+};
+
+// Types of BattOr messages that can be sent.
+enum BattOrMessageType : uint8_t {
+  // Indicates a control message sent from the client to the BattOr to tell the
+  // BattOr to do something.
+  BATTOR_MESSAGE_TYPE_CONTROL = 0x03,
+  // Indicates a control message ack sent from the BattOr back to the client to
+  // signal that the BattOr received the control message.
+  BATTOR_MESSAGE_TYPE_CONTROL_ACK,
+  // Indicates that the message contains Voltage and current measurements.
+  BATTOR_MESSAGE_TYPE_SAMPLES,
+  // TODO(charliea): Figure out what this is.
+  BATTOR_MESSAGE_TYPE_PRINT,
+};
+
+// Types of BattOr control messages that can be sent.
+enum BattOrControlMessageType : uint8_t {
+  // Tells the BattOr to initialize itself.
+  BATTOR_CONTROL_MESSAGE_TYPE_INIT = 0x00,
+  // Sets the current measurement's gain.
+  BATTOR_CONTROL_MESSAGE_TYPE_SET_GAIN,
+  // Tells the BattOr to start taking samples and sending them over the
+  // connection.
+  BATTOR_CONTROL_MESSAGE_TYPE_START_SAMPLING_UART,
+  // Tells the BattOr to start taking samples and storing them on its SD card.
+  BATTOR_CONTROL_MESSAGE_TYPE_START_SAMPLING_SD,
+  // Tells the BattOr to start streaming the samples stored on its SD card over
+  // the connection.
+  BATTOR_CONTROL_MESSAGE_TYPE_READ_SD_UART,
+  // Tells the BattOr to send its EEPROM contents over the serial connection.
+  BATTOR_CONTROL_MESSAGE_TYPE_READ_EEPROM,
+  // Tells the BattOr to reset itself.
+  BATTOR_CONTROL_MESSAGE_TYPE_RESET,
+  // Tells the BattOr to run a self test.
+  BATTOR_CONTROL_MESSAGE_TYPE_SELF_TEST,
+};
+
+// See: BattOrMessageType::BATTOR_MESSAGE_TYPE_CONTROL above.
+//
+// This struct is packed to ensure that this binary and the firmware are
+// byte-compatible.
+struct BattOrControlMessage {
+  BattOrControlMessageType type;
+  uint16_t param1;
+  uint16_t param2;
+} __attribute__((packed));
+
+}  // namespace battor
+
+#endif  // TOOLS_BATTOR_AGENT_BATTOR_PROTOCOL_H_