lx_nand_flash_page_ecc_compute.c
| Line | Branch | Exec | Source |
|---|---|---|---|
| 1 | /*************************************************************************** | ||
| 2 | * Copyright (c) 2024 Microsoft Corporation | ||
| 3 | * Copyright (c) 2026-present Eclipse ThreadX contributors | ||
| 4 | * | ||
| 5 | * This program and the accompanying materials are made available under the | ||
| 6 | * terms of the MIT License which is available at | ||
| 7 | * https://opensource.org/licenses/MIT. | ||
| 8 | * | ||
| 9 | * SPDX-License-Identifier: MIT | ||
| 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 | /**************************************************************************/ | ||
| 71 | 10 | UINT _lx_nand_flash_page_ecc_compute(LX_NAND_FLASH *nand_flash, UCHAR *page_buffer, UCHAR *ecc_buffer) | |
| 72 | { | ||
| 73 | |||
| 74 | UINT bytes_computed; | ||
| 75 | |||
| 76 | |||
| 77 | /* Loop to compute the ECC over the entire NAND flash page. */ | ||
| 78 | 10 | bytes_computed = 0; | |
| 79 |
2/2✓ Branch 5 → 3 taken 20 times.
✓ Branch 5 → 6 taken 10 times.
|
30 | while (bytes_computed < nand_flash -> lx_nand_flash_bytes_per_page) |
| 80 | { | ||
| 81 | |||
| 82 | /* Compute the ECC for this 256 byte piece of the page. */ | ||
| 83 | 20 | _lx_nand_flash_256byte_ecc_compute(page_buffer, ecc_buffer); | |
| 84 | |||
| 85 | /* Move to the next 256 byte portion of the page. */ | ||
| 86 | 20 | bytes_computed = bytes_computed + 256; | |
| 87 | |||
| 88 | /* Move the page buffer forward. */ | ||
| 89 | 20 | page_buffer = page_buffer + 256; | |
| 90 | |||
| 91 | /* Move the ECC buffer forward, note there are 3 bytes of ECC per page. */ | ||
| 92 | 20 | ecc_buffer = ecc_buffer + 3; | |
| 93 | } | ||
| 94 | |||
| 95 | /* Return success. */ | ||
| 96 | 10 | return(LX_SUCCESS); | |
| 97 | } | ||
| 98 | |||
| 99 |