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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"
float decoder_t::parseSignalBitfield(CanSignal& signal, const can_message_t& message)
{
return bitfield_parse_float(message.get_data(), CAN_MESSAGE_SIZE,
signal.bitPosition, signal.bitSize, signal.factor,
signal.offset);
}
openxc_DynamicField decoder_t::noopDecoder(CanSignal& signal,
const std::vector<CanSignal>& signals, float value, bool* send)
{
openxc_DynamicField decoded_value;
decoded_value.has_type = true;
decoded_value.type = openxc_DynamicField_Type_NUM;
decoded_value.has_numeric_value = true;
decoded_value.numeric_value = value;
return decoded_value;
}
openxc_DynamicField decoder_t::booleanDecoder(CanSignal& signal,
const std::vector<CanSignal>& signals, float value, bool* send)
{
openxc_DynamicField decoded_value;
decoded_value.has_type = true;
decoded_value.type = openxc_DynamicField_Type_BOOL;
decoded_value.has_boolean_value = true;
decoded_value.boolean_value = value == 0.0 ? false : true;
return decoded_value;
}
openxc_DynamicField decoder_t::ignoreDecoder(CanSignal& signal,
const std::vector<CanSignal>& 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(CanSignal& signal,
const std::vector<CanSignal>& signals, float value, bool* send)
{
openxc_DynamicField decoded_value = {0, openxc_DynamicField_Type_BOOL, 0, "", 0, 0, 0, 0};
decoded_value.has_type = true;
decoded_value.type = openxc_DynamicField_Type_STRING;
decoded_value.has_string_value = true;
/* TODO: Handle SignalState
const CanSignalState* signalState = lookupSignalState(value, signal);
if(signalState != NULL) {
::strcpy(decoded_value.string_value, signalState->name);
} else {
*send = false;
}*/
return decoded_value;
}
openxc_DynamicField decoder_t::translateSignal(CanSignal& signal, can_message_t& message,
const std::vector<CanSignal>& signals)
{
if(&signal == nullptr || &message == nullptr)
{
openxc_DynamicField ret = {0, openxc_DynamicField_Type_BOOL, 0, "", 0, 0, 0, 0};
return ret;
}
float value = parseSignalBitfield(signal, message);
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 = decodeSignal(signal,
value, signals, &send);
signal.received = true;
signal.lastValue = value;
return decoded_value;
}
openxc_DynamicField decoder_t::decodeSignal( CanSignal& signal,
float value, const std::vector<CanSignal>& signals, bool* send)
{
SignalDecoder decoder = signal.decoder == NULL ?
noopDecoder : signal.decoder;
openxc_DynamicField decoded_value = decoder(signal, signals,
value, send);
return decoded_value;
}
openxc_DynamicField decoder_t::decodeSignal( CanSignal& signal,
const can_message_t& message, const std::vector<CanSignal>& signals, bool* send)
{
float value = parseSignalBitfield(signal, message);
return decodeSignal(signal, value, signals, send);
}
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