FragmentationMath.h

00001 #ifndef _FRAGMENTATION_MATH_H
00002 #define _FRAGMENTATION_MATH_H
00003 #ifdef FOTA
00004 
00005 #include "mbed.h"
00006 #include "mDot.h"
00007 #include "WriteFile.h"
00008 
00009 #define FRAG_SESSION_ONGOING    0xffffffff
00010 #ifndef MAX_PARITY
00011 #define MAX_PARITY 300
00012 #endif
00013 class FragmentationMath
00014 {
00015   public:
00016     FragmentationMath(mDot* dot, uint16_t frame_count, uint8_t frame_size, WriteFile* fh);
00017     ~FragmentationMath();
00018     bool Init();
00019     int getLostFrameCount();
00020     void reset(uint16_t fcount);
00021     void setFrameFound(uint16_t frameCounter);
00022     bool processParityFrag(uint16_t frameCounter, uint8_t *pFrag);
00023 
00024     int FragmentationPrbs23(int x);
00025     bool IsPowerOfTwo(unsigned int x);
00026     int32_t FindMissingFrameIndex(uint16_t x);
00027     int32_t FindTrueFrameIndex(uint16_t x);
00028     void GetRowInFlash(int l, uint8_t *rowData);
00029     int FindFirstOne(uint8_t *boolData, int size);
00030     void StoreRowInFlash(uint8_t *rowData, int index);
00031     void XorLineData(uint8_t *dataL1, uint8_t *dataL2, int size);
00032     void XorLineBit(uint8_t *dataL1, uint8_t *dataL2, int size);
00033     void XorRowWithMatrix(uint8_t* row, int matrix_row_num);
00034     void FragmentationGetParityMatrixRow(int N, int M, uint8_t *matrixRow);
00035     void CondenseRow(uint8_t *row, int row_number, int start);
00036     void ExpandAndXorRow(uint8_t *row, int row_number);
00037     bool CheckIfMissing(int row_number, int index);
00038     void CompleteRow(int row_num);
00039     void printMatrix();
00040 
00041     uint8_t _frame_size;
00042     uint16_t _frame_count;
00043     uint16_t _max_parity;
00044     uint16_t numFramesMissing;
00045     uint16_t lastReceiveFrameCnt;
00046 
00047     uint8_t *matrix;
00048     uint8_t *matrixRow;
00049     uint8_t *parity_frag;
00050     uint8_t *missingFrameIndex;
00051     uint8_t *frag_in_flash;
00052 
00053     bool empty;
00054     int index_of_first;
00055     int matrix_row_num;
00056     int index;
00057 
00058     mDot* _dot;
00059     WriteFile* _fh;
00060 };
00061 #endif
00062 #endif // _FRAGMENTATION_MATH_H