80 lines
2.7 KiB
C++
80 lines
2.7 KiB
C++
#ifndef FSFW_TMTCPACKET_SPACEPACKETBASE_H_
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#define FSFW_TMTCPACKET_SPACEPACKETBASE_H_
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#include <cstddef>
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#include "fsfw/returnvalues/HasReturnvaluesIF.h"
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#include "fsfw/tmtcpacket/ReadablePacketIF.h"
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#include "fsfw/tmtcpacket/RedirectableDataPointerIF.h"
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#include "fsfw/tmtcpacket/ccsds/defs.h"
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/**
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* @defgroup tmtcpackets Space Packets
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* This is the group, where all classes associated with Telecommand and
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* Telemetry packets belong to.
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* The class hierarchy resembles the dependency between the different standards
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* applied, namely the CCSDS Space Packet standard and the ECCSS Packet
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* Utilization Standard. Most field and structure names are taken from these
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* standards.
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*/
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/**
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* This class is the basic data handler for any CCSDS Space Packet
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* compatible Telecommand and Telemetry packet.
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* It does not contain the packet data itself but a pointer to the
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* data must be set on instantiation. An invalid pointer may cause
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* damage, as no getter method checks data validity. Anyway, a NULL
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* check can be performed by making use of the getWholeData method.
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* Remark: All bit numbers in this documentation are counted from
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* the most significant bit (from left).
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* @ingroup tmtcpackets
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*/
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class SpacePacketReader : public SpacePacketIF,
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public ReadablePacketIF,
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public RedirectableDataPointerIF {
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public:
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SpacePacketReader() = default;
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/**
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* This is the default constructor.
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* It sets its internal data pointer to the address passed.
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* @param set_address The position where the packet data lies.
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*/
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explicit SpacePacketReader(const uint8_t* setAddress, size_t maxSize);
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/**
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* No data is allocated, so the destructor is empty.
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*/
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~SpacePacketReader() override;
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[[nodiscard]] uint16_t getPacketIdRaw() const override;
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[[nodiscard]] uint16_t getPacketSeqCtrlRaw() const override;
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[[nodiscard]] uint16_t getPacketDataLen() const override;
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const uint8_t* getFullData() override;
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// Helper methods:
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[[nodiscard]] ReturnValue_t checkLength() const;
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const uint8_t* getPacketData();
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/**
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* With this method, the packet data pointer can be redirected to another
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* location.
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* @param p_Data A pointer to another raw Space Packet.
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*/
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ReturnValue_t setData(uint8_t* p_Data, size_t maxSize, void* args) override;
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protected:
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/**
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* A pointer to a structure which defines the data structure of
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* the packet header.
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* To be hardware-safe, all elements are of byte size.
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*/
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const ccsds::PrimaryHeader* spHeader{};
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const uint8_t* packetDataField{};
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size_t maxSize = 0;
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void setInternalFields(const uint8_t* data, size_t maxSize);
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};
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#endif /* FSFW_TMTCPACKET_SPACEPACKETBASE_H_ */
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