76 lines
2.6 KiB
C++
76 lines
2.6 KiB
C++
#include "TcPacketPusA.h"
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#include "../../globalfunctions/CRC.h"
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#include <cstring>
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TcPacketPusA::TcPacketPusA(const uint8_t *setData): TcPacketBase(setData) {
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tcData = reinterpret_cast<TcPacketPointer*>(const_cast<uint8_t*>(setData));
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}
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uint8_t TcPacketPusA::getService() const {
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return tcData->dataField.service_type;
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}
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uint8_t TcPacketPusA::getSubService() {
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return tcData->dataField.service_subtype;
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}
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uint8_t TcPacketPusA::getAcknowledgeFlags() {
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return tcData->dataField.version_type_ack & 0b00001111;
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}
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const uint8_t* TcPacketPusA::getApplicationData() const {
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return &tcData->appData;
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}
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uint16_t TcPacketPusA::getApplicationDataSize() {
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return getPacketDataLength() - sizeof(tcData->dataField) - CRC_SIZE + 1;
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}
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uint16_t TcPacketPusA::getErrorControl() {
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uint16_t size = getApplicationDataSize() + CRC_SIZE;
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uint8_t* p_to_buffer = &tcData->appData;
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return (p_to_buffer[size - 2] << 8) + p_to_buffer[size - 1];
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}
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void TcPacketPusA::setErrorControl() {
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uint32_t full_size = getFullSize();
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uint16_t crc = CRC::crc16ccitt(getWholeData(), full_size - CRC_SIZE);
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uint32_t size = getApplicationDataSize();
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(&tcData->appData)[size] = (crc & 0XFF00) >> 8; // CRCH
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(&tcData->appData)[size + 1] = (crc) & 0X00FF; // CRCL
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}
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void TcPacketPusA::setData(const uint8_t* pData) {
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SpacePacketBase::setData(pData);
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// This function is const-correct, but it was decided to keep the pointer non-const
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// for convenience. Therefore, cast aways constness here and then cast to packet type.
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tcData = reinterpret_cast<TcPacketPointer*>(const_cast<uint8_t*>(pData));
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}
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uint8_t TcPacketPusA::getSecondaryHeaderFlag() {
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return (tcData->dataField.version_type_ack & 0b10000000) >> 7;
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}
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uint8_t TcPacketPusA::getPusVersionNumber() {
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return (tcData->dataField.version_type_ack & 0b01110000) >> 4;
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}
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void TcPacketPusA::initializeTcPacket(uint16_t apid, uint16_t sequenceCount,
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uint8_t ack, uint8_t service, uint8_t subservice) {
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initSpacePacketHeader(true, true, apid, sequenceCount);
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std::memset(&tcData->dataField, 0, sizeof(tcData->dataField));
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setPacketDataLength(sizeof(PUSTcDataFieldHeader) + CRC_SIZE - 1);
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// Data Field Header:
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// Set CCSDS_secondary_header_flag to 0 and version number to 001
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tcData->dataField.version_type_ack = 0b00010000;
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tcData->dataField.version_type_ack |= (ack & 0x0F);
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tcData->dataField.service_type = service;
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tcData->dataField.service_subtype = subservice;
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}
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size_t TcPacketPusA::calculateFullPacketLength(size_t appDataLen) {
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return sizeof(CCSDSPrimaryHeader) + sizeof(PUSTcDataFieldHeader) +
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appDataLen + TcPacketBase::CRC_SIZE;
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}
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