1 /*!
2 * \file nvmm.c
3 *
4 * \brief None volatile memory management module
5 *
6 * \copyright Revised BSD License, see section \ref LICENSE.
7 *
8 * \code
9 * ______ _
10 * / _____) _ | |
11 * ( (____ _____ ____ _| |_ _____ ____| |__
12 * \____ \| ___ | (_ _) ___ |/ ___) _ \
13 * _____) ) ____| | | || |_| ____( (___| | | |
14 * (______/|_____)_|_|_| \__)_____)\____)_| |_|
15 * (C)2013-2020 Semtech
16 *
17 * ___ _____ _ ___ _ _____ ___ ___ ___ ___
18 * / __|_ _/_\ / __| |/ / __/ _ \| _ \/ __| __|
19 * \__ \ | |/ _ \ (__| ' <| _| (_) | / (__| _|
20 * |___/ |_/_/ \_\___|_|\_\_| \___/|_|_\\___|___|
21 * embedded.connectivity.solutions===============
22 *
23 * \endcode
24 */
25
26 #include <stdint.h>
27
28 #include "utilities.h"
29 #include "eeprom-board.h"
30 #include "nvmm.h"
31
NvmmWrite(uint8_t * src,uint16_t size,uint16_t offset)32 uint16_t NvmmWrite( uint8_t* src, uint16_t size, uint16_t offset )
33 {
34 if( EepromMcuWriteBuffer( offset, src, size ) == LMN_STATUS_OK )
35 {
36 return size;
37 }
38 return 0;
39 }
40
NvmmRead(uint8_t * dest,uint16_t size,uint16_t offset)41 uint16_t NvmmRead( uint8_t* dest, uint16_t size, uint16_t offset )
42 {
43 if( EepromMcuReadBuffer( offset, dest, size ) == LMN_STATUS_OK )
44 {
45 return size;
46 }
47 return 0;
48 }
49
NvmmCrc32Check(uint16_t size,uint16_t offset)50 bool NvmmCrc32Check( uint16_t size, uint16_t offset )
51 {
52 uint8_t data = 0;
53 uint32_t calculatedCrc32 = 0;
54 uint32_t readCrc32 = 0;
55
56 if( NvmmRead( ( uint8_t* ) &readCrc32, sizeof( readCrc32 ),
57 ( offset + ( size - sizeof( readCrc32 ) ) ) ) == sizeof( readCrc32 ) )
58 {
59 // Calculate crc
60 calculatedCrc32 = Crc32Init( );
61 for( uint16_t i = 0; i < ( size - sizeof( readCrc32 ) ); i++ )
62 {
63 if( NvmmRead( &data, 1, offset + i ) != 1 )
64 {
65 return false;
66 }
67 calculatedCrc32 = Crc32Update( calculatedCrc32, &data, 1 );
68 }
69 calculatedCrc32 = Crc32Finalize( calculatedCrc32 );
70
71 if( calculatedCrc32 != readCrc32 )
72 {
73 return false;
74 }
75 }
76 return true;
77 }
78
NvmmReset(uint16_t size,uint16_t offset)79 bool NvmmReset( uint16_t size, uint16_t offset )
80 {
81 uint32_t crc32 = 0;
82
83 if( EepromMcuWriteBuffer( offset + size - sizeof( crc32 ),
84 ( uint8_t* ) &crc32, sizeof( crc32 ) ) == LMN_STATUS_OK )
85 {
86 return true;
87 }
88 return false;
89 }
90
