85 lines
2.5 KiB
C
85 lines
2.5 KiB
C
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#ifndef BSP_Q7S_DEVICES_ARCSECDATALINKLAYER_H_
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#define BSP_Q7S_DEVICES_ARCSECDATALINKLAYER_H_
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#include "mission/devices/devicedefinitions/StarTrackerDefinitions.h"
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#include "fsfw/returnvalues/HasReturnValuesIF.h"
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extern "C" {
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#include "common/misc.h"
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}
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/**
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* @brief Helper class to handle the datalinklayer of replies from the star tracker of arcsec.
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*/
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class ArcsecDatalinkLayer: public HasReturnvaluesIF {
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public:
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static const uint8_t INTERFACE_ID = CLASS_ID::STR_HANDLER;
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//! [EXPORT] : [COMMENT] More data required to complete frame
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static const ReturnValue_t DEC_IN_PROGRESS = MAKE_RETURN_CODE(0xA0);
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//! [EXPORT] : [COMMENT] Data too short to represent a valid frame
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static const ReturnValue_t REPLY_TOO_SHORT = MAKE_RETURN_CODE(0xA1);
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//! [EXPORT] : [COMMENT] Detected CRC failure in received frame
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static const ReturnValue_t CRC_FAILURE = MAKE_RETURN_CODE(0xA2);
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ArcsecDatalinkLayer();
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virtual ~ArcsecDatalinkLayer();
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/**
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* @brief Applies decoding to data referenced by rawData pointer
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*
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* @param rawData Pointer to raw data received from star tracker
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* @param rawDataSize Size of raw data stream
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* @param remainingBytes Number of bytes left
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*/
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ReturnValue_t decodeFrame(const uint8_t* rawData, size_t rawDataSize, size_t* bytesLeft);
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/**
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* @brief SLIP encodes data pointed to by data pointer.
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*
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* @param data Pointer to data to encode
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* @param length Length of buffer to encode
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*/
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void encodeFrame(const uint8_t* data, uint32_t length);
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/**
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* @brief Returns the frame type field of a decoded frame.
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*/
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uint8_t getReplyFrameType();
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/**
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* @brief Returns pointer to reply packet.
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*/
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const uint8_t* getReply();
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/**
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* @brief Returns size of encoded frame
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*/
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uint32_t getEncodedLength();
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/**
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* @brief Returns pointer to encoded frame
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*/
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uint8_t* getEncodedFrame();
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private:
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// Used by arcsec slip decoding function process received data
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uint8_t rxBuffer[StarTracker::MAX_FRAME_SIZE];
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// Decoded frame will be copied to this buffer
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uint8_t decodedFrame[StarTracker::MAX_FRAME_SIZE];
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// Buffer where encoded frames will be stored
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uint8_t encBuffer[StarTracker::MAX_FRAME_SIZE * 2 + 2];
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// Size of decoded frame
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uint32_t decFrameSize = 0;
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// Size of encoded frame
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uint32_t encFrameSize = 0;
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slip_decode_state slipInfo;
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void slipInit();
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};
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#endif /* BSP_Q7S_DEVICES_ARCSECDATALINKLAYER_H_ */
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