FragmentationMath.h

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00005 * MULTI-TECH SYSTEMS, INC.
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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 #ifndef MAX_PARITY
00028 #define MAX_PARITY 300
00029 #endif
00030 class FragmentationMath
00031 {
00032   public:
00033     FragmentationMath(mDot* dot, uint16_t frame_count, uint8_t frame_size, WriteFile* fh);
00034     ~FragmentationMath();
00035     bool Init();
00036     int getLostFrameCount();
00037     void reset(uint16_t fcount);
00038     void setFrameFound(uint16_t frameCounter);
00039     bool processParityFrag(uint16_t frameCounter, uint8_t *pFrag);
00040 
00041     int FragmentationPrbs23(int x);
00042     bool IsPowerOfTwo(unsigned int x);
00043     int32_t FindMissingFrameIndex(uint16_t x);
00044     int32_t FindTrueFrameIndex(uint16_t x);
00045     void GetRowInFlash(int l, uint8_t *rowData);
00046     int FindFirstOne(uint8_t *boolData, int size);
00047     void StoreRowInFlash(uint8_t *rowData, int index);
00048     void XorLineData(uint8_t *dataL1, uint8_t *dataL2, int size);
00049     void XorLineBit(uint8_t *dataL1, uint8_t *dataL2, int size);
00050     void XorRowWithMatrix(uint8_t* row, int matrix_row_num);
00051     void FragmentationGetParityMatrixRow(int N, int M, uint8_t *matrixRow);
00052     void CondenseRow(uint8_t *row, int row_number, int start);
00053     void ExpandAndXorRow(uint8_t *row, int row_number);
00054     bool CheckIfMissing(int row_number, int index);
00055     void CompleteRow(int row_num);
00056     void printMatrix();
00057 
00058     uint8_t _frame_size;
00059     uint16_t _frame_count;
00060     uint16_t _max_parity;
00061     uint16_t numFramesMissing;
00062     uint16_t lastReceiveFrameCnt;
00063 
00064     uint8_t *matrix;
00065     uint8_t *matrixRow;
00066     uint8_t *parity_frag;
00067     uint8_t *missingFrameIndex;
00068     uint8_t *frag_in_flash;
00069 
00070     bool empty;
00071     int index_of_first;
00072     int matrix_row_num;
00073     int index;
00074 
00075     mDot* _dot;
00076     WriteFile* _fh;
00077 };
00078 #endif
00079 #endif // _FRAGMENTATION_MATH_H