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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31 * @defgroup MEMORY FreeRTOS+FAT Memory Access Routines
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32 * @brief Handles memory access in a portable way.
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34 * Provides simple, fast, and portable access to memory routines.
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35 * These are only used to read data from buffers. That are LITTLE ENDIAN
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36 * due to the FAT specification.
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38 * These routines may need to be modified to your platform.
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42 #include "ff_headers.h"
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45 * Here below 3 x 2 access functions that allow the code
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46 * not to worry about the endianness of the MCU.
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50 #if( ffconfigINLINE_MEMORY_ACCESS == 0 )
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52 uint8_t FF_getChar( const uint8_t *pBuffer, uint32_t aOffset )
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54 return ( uint8_t ) ( pBuffer[ aOffset ] );
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57 uint16_t FF_getShort( const uint8_t *pBuffer, uint32_t aOffset )
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62 u16.bytes.u8_1 = pBuffer[ 1 ];
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63 u16.bytes.u8_0 = pBuffer[ 0 ];
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68 uint32_t FF_getLong( const uint8_t *pBuffer, uint32_t aOffset )
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73 u32.bytes.u8_3 = pBuffer[ 3 ];
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74 u32.bytes.u8_2 = pBuffer[ 2 ];
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75 u32.bytes.u8_1 = pBuffer[ 1 ];
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76 u32.bytes.u8_0 = pBuffer[ 0 ];
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81 void FF_putChar( uint8_t *pBuffer, uint32_t aOffset, uint32_t Value )
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83 pBuffer[ aOffset ] = ( uint8_t ) Value;
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86 void FF_putShort( uint8_t *pBuffer, uint32_t aOffset, uint32_t Value )
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90 u16.u16 = ( uint16_t ) Value;
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92 pBuffer[ 0 ] = u16.bytes.u8_0;
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93 pBuffer[ 1 ] = u16.bytes.u8_1;
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96 void FF_putLong( uint8_t *pBuffer, uint32_t aOffset, uint32_t Value )
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101 pBuffer += aOffset;
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102 pBuffer[ 0 ] = u32.bytes.u8_0;
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103 pBuffer[ 1 ] = u32.bytes.u8_1;
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104 pBuffer[ 2 ] = u32.bytes.u8_2;
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105 pBuffer[ 3 ] = u32.bytes.u8_3;
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