FragmentationMath.h

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00017 
00018 #ifndef _FRAGMENTATION_MATH_H
00019 #define _FRAGMENTATION_MATH_H
00020 #ifdef FOTA
00021 
00022 #include "mbed.h"
00023 #include "mDot.h"
00024 #include "WriteFile.h"
00025 
00026 #define FRAG_SESSION_ONGOING    0xffffffff
00027 
00028 #ifndef MAX_PARITY
00029 #define MAX_PARITY 300
00030 #endif
00031 
00032 class FragmentationMath
00033 {
00034   public:
00035     FragmentationMath(mDot* dot, uint16_t frame_count, uint8_t frame_size, WriteFile* fh);
00036     ~FragmentationMath();
00037     bool Init();
00038     int getLostFrameCount();
00039     int getTotalMissingFrameCount();
00040     int getTotalRcvdFrameCount();
00041     void reset(uint16_t fcount);
00042     void setFrameFound(uint16_t frameCounter);
00043     bool processParityFrag(uint16_t frameCounter, uint8_t *pFrag);
00044 
00045     int FragmentationPrbs23(int x);
00046     bool IsPowerOfTwo(unsigned int x);
00047     int32_t FindMissingFrameIndex(uint16_t x);
00048     int32_t FindTrueFrameIndex(uint16_t x);
00049     void GetRowInFlash(int l, uint8_t *rowData);
00050     int FindFirstOne(uint8_t *boolData, int size);
00051     void StoreRowInFlash(uint8_t *rowData, int index);
00052     void XorLineData(uint8_t *dataL1, uint8_t *dataL2, int size);
00053     void XorLineBit(uint8_t *dataL1, uint8_t *dataL2, int size);
00054     void XorRowWithMatrix(uint8_t* row, int matrix_row_num);
00055     void FragmentationGetParityMatrixRow(int N, int M, uint8_t *matrixRow);
00056     void CondenseRow(uint8_t *row, int row_number, int start);
00057     void ExpandAndXorRow(uint8_t *row, int row_number);
00058     bool CheckIfMissing(int row_number, int index);
00059     void CompleteRow(int row_num);
00060     void printMatrix();
00061 
00062     uint8_t _frame_size;
00063     uint16_t _frame_count;
00064     uint16_t _max_parity;
00065     int16_t numFramesMissing;
00066     uint16_t lastReceiveFrameCnt;
00067     int filled;
00068 
00069     uint8_t *matrix;
00070     uint8_t *matrixRow;
00071     uint8_t *parity_frag;
00072     uint8_t *missingFrameIndex;
00073     uint8_t *frag_in_flash;
00074 
00075     bool empty;
00076     int index_of_first;
00077     int matrix_row_num;
00078     int index;
00079 
00080     mDot* _dot;
00081     WriteFile* _fh;
00082 };
00083 #endif
00084 #endif // _FRAGMENTATION_MATH_H