TlmPacket.cpp

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/*
 * TlmPacket.cpp
 *
 *  Created on: May 24, 2014
 *      Author: Timothy Canham
 */
#include <Fw/Types/Serializable.hpp>
#include <Fw/Tlm/TlmPacket.hpp>
#include <Fw/Types/Assert.hpp>
 
namespace Fw {
 
    TlmPacket::TlmPacket() : m_numEntries(0) {
        this->m_type = FW_PACKET_TELEM;
        this->m_tlmBuffer.resetSer();
    }
 
    TlmPacket::~TlmPacket() {
    }
 
    SerializeStatus TlmPacket::resetPktSer() {
        this->m_tlmBuffer.resetSer();
        // reset packet count
        this->m_numEntries = 0;
        // make sure packet type is correct before serializing. It should
        // never be anything but FW_PACKET_TELEM, so assert.
        FW_ASSERT(FW_PACKET_TELEM == this->m_type,this->m_type);
        // serialize descriptor
        // The function serializeBase inherited from ComPacket converts this->m_type
        // to type FwPacketDescriptorType and serializes the result into this->m_tlmBuffer.
        return this->serializeBase(this->m_tlmBuffer);
    }
 
    SerializeStatus TlmPacket::resetPktDeser() {
        this->m_tlmBuffer.resetDeser();
        // deserialize descriptor
        // The function deserializeBase inherited from ComPacket deserializes a
        // value of type FwPacketDescriptorType from this->m_tlmBuffer and stores it
        // into this->m_type.
        Fw::SerializeStatus stat = this->deserializeBase(this->m_tlmBuffer);
        if (stat != Fw::FW_SERIALIZE_OK) {
            return stat;
        }
        // make sure that this->m_tlmBuffer stores a telemetry packet
        if (this->m_type != FW_PACKET_TELEM) {
            return Fw::FW_DESERIALIZE_TYPE_MISMATCH;
        }
 
        return Fw::FW_SERIALIZE_OK;
    }
 
    NATIVE_UINT_TYPE TlmPacket::getNumEntries() {
        return this->m_numEntries;
    }
 
    Fw::ComBuffer& TlmPacket::getBuffer() {
        return this->m_tlmBuffer;
    }
 
    void TlmPacket::setBuffer(Fw::ComBuffer& buffer) {
        this->m_tlmBuffer = buffer;
    }
 
    SerializeStatus TlmPacket::addValue(FwChanIdType id, Time& timeTag, TlmBuffer& buffer) {
        // check to make sure there is room for all the fields
        NATIVE_UINT_TYPE left = this->m_tlmBuffer.getBuffCapacity()-this->m_tlmBuffer.getBuffLength();
        if (
            (sizeof(FwChanIdType) + Time::SERIALIZED_SIZE + buffer.getBuffLength()) > left
        ) {
            return Fw::FW_SERIALIZE_NO_ROOM_LEFT;
        }
 
        // serialize items into buffer
 
        // id
        SerializeStatus stat = this->m_tlmBuffer.serialize(id);
        if (stat != Fw::FW_SERIALIZE_OK) {
            return stat;
        }
 
        // time tag
        stat = this->m_tlmBuffer.serialize(timeTag);
        if (stat != Fw::FW_SERIALIZE_OK) {
            return stat;
        }
 
        // telemetry buffer
        stat = this->m_tlmBuffer.serialize(buffer.getBuffAddr(),buffer.getBuffLength(),true);
        if (stat != Fw::FW_SERIALIZE_OK) {
            return stat;
        }
 
        // increment number of packets
        this->m_numEntries++;
 
        return Fw::FW_SERIALIZE_OK;
    }
 
            // extract telemetry value
    SerializeStatus TlmPacket::extractValue(FwChanIdType &id, Time& timeTag, TlmBuffer& buffer, NATIVE_UINT_TYPE bufferSize) {
 
        // deserialize items out of buffer
 
        // id
        SerializeStatus stat = this->m_tlmBuffer.deserialize(id);
        if (stat != Fw::FW_SERIALIZE_OK) {
            return stat;
        }
 
        // time tag
        stat = this->m_tlmBuffer.deserialize(timeTag);
        if (stat != Fw::FW_SERIALIZE_OK) {
            return stat;
        }
 
        // telemetry buffer
        stat = this->m_tlmBuffer.deserialize(buffer.getBuffAddr(),bufferSize,true);
        if (stat != Fw::FW_SERIALIZE_OK) {
            return stat;
        }
 
        // set buffer size
        stat = buffer.setBuffLen(bufferSize);
        if (stat != Fw::FW_SERIALIZE_OK) {
            return stat;
        }
 
        return Fw::FW_SERIALIZE_OK;
 
    }
 
    SerializeStatus TlmPacket::serialize(SerializeBufferBase& buffer) const {
        // serialize the number of packets
        SerializeStatus stat = buffer.serialize(this->m_numEntries);
        if (stat != Fw::FW_SERIALIZE_OK) {
            return stat;
        }
        // Serialize the ComBuffer
        return buffer.serialize(this->m_tlmBuffer.getBuffAddr(),m_tlmBuffer.getBuffLength(),true);
    }
 
    SerializeStatus TlmPacket::deserialize(SerializeBufferBase& buffer) {
 
        // deserialize the number of packets
        SerializeStatus stat = buffer.deserialize(this->m_numEntries);
        if (stat != Fw::FW_SERIALIZE_OK) {
            return stat;
        }
        // deserialize the channel value entry buffers
        NATIVE_UINT_TYPE size = buffer.getBuffLeft();
        stat = buffer.deserialize(this->m_tlmBuffer.getBuffAddr(),size,true);
        if (stat == FW_SERIALIZE_OK) {
            // Shouldn't fail
            stat = this->m_tlmBuffer.setBuffLen(size);
            FW_ASSERT(stat == FW_SERIALIZE_OK,static_cast<NATIVE_INT_TYPE>(stat));
        }
        return stat;
    }
 
} /* namespace Fw */