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/*
* Copyright (C) 2015, 2016 "IoT.bzh"
* Author "Romain Forlot" <romain.forlot@iot.bzh>
*
* 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
*
* http://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 "can-decoder.hpp"
#include "canutil/read.h"
#include "../utils/openxc-utils.hpp"
float decoder_t::parseSignalBitfield(can_signal_t& signal, const can_message_t& message)
{
return bitfield_parse_float(message.get_data(), CAN_MESSAGE_SIZE,
signal.get_bit_position(), signal.get_bit_size(), signal.get_factor(),
signal.get_offset());
}
openxc_DynamicField decoder_t::noopDecoder(can_signal_t& signal,
const std::vector<can_signal_t>& signals, float value, bool* send)
{
openxc_DynamicField decoded_value = build_DynamicField(value);
return decoded_value;
}
openxc_DynamicField decoder_t::booleanDecoder(can_signal_t& signal,
const std::vector<can_signal_t>& signals, float value, bool* send)
{
openxc_DynamicField decoded_value = build_DynamicField(value == 0.0 ? false : true);
return decoded_value;
}
openxc_DynamicField decoder_t::ignoreDecoder(can_signal_t& signal,
const std::vector<can_signal_t>& signals, float value, bool* send)
{
if(send)
*send = false;
openxc_DynamicField decoded_value = {0, openxc_DynamicField_Type_BOOL, 0, "", 0, 0, 0, 0};
return decoded_value;
}
openxc_DynamicField decoder_t::stateDecoder(can_signal_t& signal,
const std::vector<can_signal_t>& signals, float value, bool* send)
{
const std::string signal_state = signal.get_states(value);
openxc_DynamicField decoded_value = build_DynamicField(signal_state);
if(signal_state.size() <= 0)
{
*send = false;
ERROR(binder_interface, "stateDecoder: No state found with index: %d", (int)value);
}
return decoded_value;
}
openxc_DynamicField decoder_t::translateSignal(can_signal_t& signal, can_message_t& message,
const std::vector<can_signal_t>& signals)
{
if(&signal == nullptr || &message == nullptr)
{
openxc_DynamicField ret = {0, openxc_DynamicField_Type_BOOL, 0, "", 0, 0, 0, 0};
return ret;
}
float value = decoder_t::parseSignalBitfield(signal, message);
DEBUG(binder_interface, "translateSignal: Decoded message from parseSignalBitfield: %f", value);
bool send = true;
// Must call the decoders every time, regardless of if we are going to
// decide to send the signal or not.
openxc_DynamicField decoded_value = decoder_t::decodeSignal(signal,
value, signals, &send);
signal.set_received(true);
signal.set_last_value(value);
return decoded_value;
}
openxc_DynamicField decoder_t::decodeSignal( can_signal_t& signal,
float value, const std::vector<can_signal_t>& signals, bool* send)
{
SignalDecoder decoder = signal.get_decoder() == nullptr ?
noopDecoder : signal.get_decoder();
openxc_DynamicField decoded_value = decoder(signal, signals,
value, send);
return decoded_value;
}
openxc_DynamicField decoder_t::decodeSignal( can_signal_t& signal,
const can_message_t& message, const std::vector<can_signal_t>& signals, bool* send)
{
float value = parseSignalBitfield(signal, message);
return decodeSignal(signal, value, signals, send);
}
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