/* | |
* FreeRTOS+FAT build 191128 - Note: FreeRTOS+FAT is still in the lab! | |
* Copyright (C) 2018 Amazon.com, Inc. or its affiliates. All Rights Reserved. | |
* Authors include James Walmsley, Hein Tibosch and Richard Barry | |
* | |
* Permission is hereby granted, free of charge, to any person obtaining a copy of | |
* this software and associated documentation files (the "Software"), to deal in | |
* the Software without restriction, including without limitation the rights to | |
* use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of | |
* the Software, and to permit persons to whom the Software is furnished to do so, | |
* subject to the following conditions: | |
* | |
* The above copyright notice and this permission notice shall be included in all | |
* copies or substantial portions of the Software. | |
* | |
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS | |
* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR | |
* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER | |
* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN | |
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. | |
* | |
* https://www.FreeRTOS.org | |
* | |
*/ | |
/** | |
* @file ff_memory.c | |
* @ingroup MEMORY | |
* | |
* @defgroup MEMORY FreeRTOS+FAT Memory Access Routines | |
* @brief Handles memory access in a portable way. | |
* | |
* Provides simple, fast, and portable access to memory routines. | |
* These are only used to read data from buffers. That are LITTLE ENDIAN | |
* due to the FAT specification. | |
* | |
* These routines may need to be modified to your platform. | |
* | |
**/ | |
#include "ff_headers.h" | |
/* | |
* Here below 3 x 2 access functions that allow the code | |
* not to worry about the endianness of the MCU. | |
*/ | |
#if( ffconfigINLINE_MEMORY_ACCESS == 0 ) | |
uint8_t FF_getChar( const uint8_t *pBuffer, uint32_t aOffset ) | |
{ | |
return ( uint8_t ) ( pBuffer[ aOffset ] ); | |
} | |
uint16_t FF_getShort( const uint8_t *pBuffer, uint32_t aOffset ) | |
{ | |
FF_T_UN16 u16; | |
pBuffer += aOffset; | |
u16.bytes.u8_1 = pBuffer[ 1 ]; | |
u16.bytes.u8_0 = pBuffer[ 0 ]; | |
return u16.u16; | |
} | |
uint32_t FF_getLong( const uint8_t *pBuffer, uint32_t aOffset ) | |
{ | |
FF_T_UN32 u32; | |
pBuffer += aOffset; | |
u32.bytes.u8_3 = pBuffer[ 3 ]; | |
u32.bytes.u8_2 = pBuffer[ 2 ]; | |
u32.bytes.u8_1 = pBuffer[ 1 ]; | |
u32.bytes.u8_0 = pBuffer[ 0 ]; | |
return u32.u32; | |
} | |
void FF_putChar( uint8_t *pBuffer, uint32_t aOffset, uint32_t Value ) | |
{ | |
pBuffer[ aOffset ] = ( uint8_t ) Value; | |
} | |
void FF_putShort( uint8_t *pBuffer, uint32_t aOffset, uint32_t Value ) | |
{ | |
FF_T_UN16 u16; | |
u16.u16 = ( uint16_t ) Value; | |
pBuffer += aOffset; | |
pBuffer[ 0 ] = u16.bytes.u8_0; | |
pBuffer[ 1 ] = u16.bytes.u8_1; | |
} | |
void FF_putLong( uint8_t *pBuffer, uint32_t aOffset, uint32_t Value ) | |
{ | |
FF_T_UN32 u32; | |
u32.u32 = Value; | |
pBuffer += aOffset; | |
pBuffer[ 0 ] = u32.bytes.u8_0; | |
pBuffer[ 1 ] = u32.bytes.u8_1; | |
pBuffer[ 2 ] = u32.bytes.u8_2; | |
pBuffer[ 3 ] = u32.bytes.u8_3; | |
} | |
#endif |