2 * FreeRTOS+FAT build 191128 - Note: FreeRTOS+FAT is still in the lab!
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3 * Copyright (C) 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved.
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4 * Authors include James Walmsley, Hein Tibosch and Richard Barry
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6 * Permission is hereby granted, free of charge, to any person obtaining a copy of
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7 * this software and associated documentation files (the "Software"), to deal in
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8 * the Software without restriction, including without limitation the rights to
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9 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
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10 * the Software, and to permit persons to whom the Software is furnished to do so,
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11 * subject to the following conditions:
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13 * The above copyright notice and this permission notice shall be included in all
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14 * copies or substantial portions of the Software.
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16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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17 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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18 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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19 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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20 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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21 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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23 * https://www.FreeRTOS.org
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36 #error this header will be included from "plusfat.h"
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39 /*---------- ERROR CODES */
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42 /*---------- PROTOTYPES */
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44 /* HT statistics Will be taken away after testing: */
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45 #if( ffconfigFAT_USES_STAT != 0 )
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49 unsigned clearCount;
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50 unsigned getCount[2]; /* Index 0 for READ counts, index 1 for WRITE counts. */
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51 unsigned reuseCount[2];
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52 unsigned missCount[2];
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55 extern struct SFatStat fatStat;
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58 #if( ffconfigWRITE_BOTH_FATS != 0 )
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59 #define ffconfigBUF_STORE_COUNT 2
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61 #define ffconfigBUF_STORE_COUNT 1
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64 typedef struct _FatBuffers
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66 FF_Buffer_t *pxBuffers[ffconfigBUF_STORE_COUNT];
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67 uint8_t ucMode; /* FF_MODE_READ or WRITE. */
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70 uint32_t FF_getClusterPosition( FF_IOManager_t *pxIOManager, uint32_t ulEntry, uint32_t ulEntrySize );
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71 uint32_t FF_getClusterChainNumber( FF_IOManager_t *pxIOManager, uint32_t ulEntry, uint32_t ulEntrySize );
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72 uint32_t FF_getMajorBlockNumber( FF_IOManager_t *pxIOManager, uint32_t ulEntry, uint32_t ulEntrySize );
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73 uint32_t FF_getMinorBlockNumber( FF_IOManager_t *pxIOManager, uint32_t ulEntry, uint32_t ulEntrySize );
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74 uint32_t FF_getMinorBlockEntry( FF_IOManager_t *pxIOManager, uint32_t ulEntry, uint32_t ulEntrySize );
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76 /* A partition may define a block size larger than 512 bytes (at offset 0x0B of the PBR).
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77 This function translates a block address to an address based on 'pxIOManager->usBlkSize',
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78 which is usually 512 bytes.
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80 static portINLINE uint32_t FF_getRealLBA( FF_IOManager_t *pxIOManager, uint32_t LBA )
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82 return LBA * pxIOManager->xPartition.ucBlkFactor;
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85 uint32_t FF_Cluster2LBA( FF_IOManager_t *pxIOManager, uint32_t ulCluster );
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86 uint32_t FF_LBA2Cluster( FF_IOManager_t *pxIOManager, uint32_t ulAddress );
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87 uint32_t FF_getFATEntry( FF_IOManager_t *pxIOManager, uint32_t ulCluster, FF_Error_t *pxError, FF_FATBuffers_t *pxFATBuffers );
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88 FF_Error_t FF_putFATEntry( FF_IOManager_t *pxIOManager, uint32_t ulCluster, uint32_t ulValue, FF_FATBuffers_t *pxFATBuffers );
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89 BaseType_t FF_isEndOfChain( FF_IOManager_t *pxIOManager, uint32_t ulFatEntry );
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90 uint32_t FF_FindFreeCluster( FF_IOManager_t *pxIOManager, FF_Error_t *pxError, BaseType_t aDoClaim );
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91 uint32_t FF_ExtendClusterChain( FF_IOManager_t *pxIOManager, uint32_t ulStartCluster, uint32_t ulCount );
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92 FF_Error_t FF_UnlinkClusterChain( FF_IOManager_t *pxIOManager, uint32_t ulStartCluster, BaseType_t xDoTruncate );
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93 uint32_t FF_TraverseFAT( FF_IOManager_t *pxIOManager, uint32_t ulStart, uint32_t ulCount, FF_Error_t *pxError );
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94 uint32_t FF_CreateClusterChain( FF_IOManager_t *pxIOManager, FF_Error_t *pxError );
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95 uint32_t FF_GetChainLength( FF_IOManager_t *pxIOManager, uint32_t pa_nStartCluster, uint32_t *piEndOfChain, FF_Error_t *pxError );
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96 uint32_t FF_FindEndOfChain( FF_IOManager_t *pxIOManager, uint32_t Start, FF_Error_t *pxError );
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97 FF_Error_t FF_ClearCluster( FF_IOManager_t *pxIOManager, uint32_t ulCluster );
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99 #if( ffconfig64_NUM_SUPPORT != 0 )
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100 uint64_t FF_GetFreeSize( FF_IOManager_t *pxIOManager, FF_Error_t *pxError );
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102 uint32_t FF_GetFreeSize( FF_IOManager_t *pxIOManager, FF_Error_t *pxError );
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105 /* WARNING: If this prototype changes, it must be updated in ff_ioman.c also! */
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106 uint32_t FF_CountFreeClusters( FF_IOManager_t *pxIOManager, FF_Error_t *pxError );
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108 FF_Error_t FF_ReleaseFATBuffers( FF_IOManager_t *pxIOManager, FF_FATBuffers_t *pxFATBuffers );
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110 static portINLINE void FF_InitFATBuffers( FF_FATBuffers_t *pxFATBuffers, uint8_t ucMode )
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112 pxFATBuffers->pxBuffers[ 0 ] = NULL;
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113 #if ffconfigBUF_STORE_COUNT > 1
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114 pxFATBuffers->pxBuffers[ 1 ] = NULL;
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116 #if ffconfigBUF_STORE_COUNT > 2
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117 #error Please check this code, maybe it is time to use memset
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119 pxFATBuffers->ucMode = ucMode; /* FF_MODE_READ/WRITE */
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120 #if ffconfigFAT_USES_STAT
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122 fatStat.initCount++;
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