1 /**************************************************************************/
2 /* */
3 /* Copyright (c) Microsoft Corporation. All rights reserved. */
4 /* */
5 /* This software is licensed under the Microsoft Software License */
6 /* Terms for Microsoft Azure RTOS. Full text of the license can be */
7 /* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
8 /* and in the root directory of this software. */
9 /* */
10 /**************************************************************************/
11
12
13 /**************************************************************************/
14 /**************************************************************************/
15 /** */
16 /** LevelX Component */
17 /** */
18 /** NAND Flash */
19 /** */
20 /**************************************************************************/
21 /**************************************************************************/
22
23 #define LX_SOURCE_CODE
24
25
26 /* Disable ThreadX error checking. */
27
28 #ifndef LX_DISABLE_ERROR_CHECKING
29 #define LX_DISABLE_ERROR_CHECKING
30 #endif
31
32
33 /* Include necessary system files. */
34
35 #include "lx_api.h"
36
37
38 /**************************************************************************/
39 /* */
40 /* FUNCTION RELEASE */
41 /* */
42 /* _lx_nand_flash_page_ecc_compute PORTABLE C */
43 /* 6.1.7 */
44 /* AUTHOR */
45 /* */
46 /* William E. Lamie, Microsoft Corporation */
47 /* */
48 /* DESCRIPTION */
49 /* */
50 /* This function computes the ECC for a NAND flash page. */
51 /* */
52 /* INPUT */
53 /* */
54 /* nand_flash NAND flash instance */
55 /* page_buffer Page buffer */
56 /* ecc_buffer Returned ECC buffer */
57 /* */
58 /* OUTPUT */
59 /* */
60 /* return status */
61 /* */
62 /* CALLS */
63 /* */
64 /* _lx_nand_flash_256byte_ecc_compute Compute ECC for 256 bytes */
65 /* */
66 /* CALLED BY */
67 /* */
68 /* NAND flash driver */
69 /* */
70 /* RELEASE HISTORY */
71 /* */
72 /* DATE NAME DESCRIPTION */
73 /* */
74 /* 05-19-2020 William E. Lamie Initial Version 6.0 */
75 /* 09-30-2020 William E. Lamie Modified comment(s), */
76 /* resulting in version 6.1 */
77 /* 06-02-2021 Bhupendra Naphade Modified comment(s), */
78 /* resulting in version 6.1.7 */
79 /* */
80 /**************************************************************************/
_lx_nand_flash_page_ecc_compute(LX_NAND_FLASH * nand_flash,UCHAR * page_buffer,UCHAR * ecc_buffer)81 UINT _lx_nand_flash_page_ecc_compute(LX_NAND_FLASH *nand_flash, UCHAR *page_buffer, UCHAR *ecc_buffer)
82 {
83
84 UINT bytes_computed;
85
86
87 /* Loop to compute the ECC over the entire NAND flash page. */
88 bytes_computed = 0;
89 while (bytes_computed < nand_flash -> lx_nand_flash_bytes_per_page)
90 {
91
92 /* Compute the ECC for this 256 byte piece of the page. */
93 _lx_nand_flash_256byte_ecc_compute(page_buffer, ecc_buffer);
94
95 /* Move to the next 256 byte portion of the page. */
96 bytes_computed = bytes_computed + 256;
97
98 /* Move the page buffer forward. */
99 page_buffer = page_buffer + 256;
100
101 /* Move the ECC buffer forward, note there are 3 bytes of ECC per page. */
102 ecc_buffer = ecc_buffer + 3;
103 }
104
105 /* Return success. */
106 return(LX_SUCCESS);
107 }
108
109
