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// Copyright 2016 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_SAMPLE_CONVERTER_H_
#define TOOLS_BATTOR_AGENT_BATTOR_SAMPLE_CONVERTER_H_
#include <stddef.h>
#include <vector>
#include "base/macros.h"
#include "tools/battor_agent/battor_protocol_types.h"
namespace battor {
// Converter capable of taking raw samples from the BattOr and using
// configuration information to turn them into samples with real units.
class BattOrSampleConverter {
public:
// Constructs a BattOrSampleConverter.
//
// - eeprom: The BattOr's EEPROM, which contains some required conversion
// parameters.
// - calibration_frame: The first frame sent back from the BattOr when
// streaming samples. This frame gives current and voltage measurements
// that ignore whatever the BattOr's connected to, and therefore provide
// a means for us to determine baseline current and voltage.
BattOrSampleConverter(const BattOrEEPROM& eeprom,
const std::vector<RawBattOrSample>& calibration_frame);
virtual ~BattOrSampleConverter();
// Converts a raw sample to a unitful one with a timestamp.
BattOrSample ToSample(const RawBattOrSample& sample,
size_t sample_number) const;
// Returns the lowest magnitude sample that the BattOr can collect.
BattOrSample MinSample() const;
// Returns the highest magnitude sample that the BattOr can collect.
BattOrSample MaxSample() const;
private:
// The BattOr's EEPROM, which stores some conversion parameters we need.
BattOrEEPROM eeprom_;
// The baseline current and voltage calculated from the calibration frame.
double baseline_current_;
double baseline_voltage_;
DISALLOW_COPY_AND_ASSIGN(BattOrSampleConverter);
};
} // namespace battor
#endif // TOOLS_BATTOR_AGENT_BATTOR_SAMPLE_CONVERTER_H_
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