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2020-05-11 08:49:43 -06:00
commit 6f4ea0561f
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common/src/lx_nand_flash_page_ecc_check.c
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/**************************************************************************/
/* */
/* Copyright (c) Microsoft Corporation. All rights reserved. */
/* */
/* This software is licensed under the Microsoft Software License */
/* Terms for Microsoft Azure RTOS. Full text of the license can be */
/* found in the LICENSE file at https://aka.ms/AzureRTOS_EULA */
/* and in the root directory of this software. */
/* */
/**************************************************************************/
/**************************************************************************/
/**************************************************************************/
/** */
/** LevelX Component */
/** */
/** NAND Flash */
/** */
/**************************************************************************/
/**************************************************************************/
#define LX_SOURCE_CODE
/* Disable ThreadX error checking. */
#ifndef TX_DISABLE_ERROR_CHECKING
#define TX_DISABLE_ERROR_CHECKING
#endif
/* Include necessary system files. */
#include "lx_api.h"
/**************************************************************************/
/* */
/* FUNCTION RELEASE */
/* */
/* _lx_nand_flash_page_ecc_check PORTABLE C */
/* 6.0 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function checks the NAND page and ECC for errors and */
/* attempts to correct 1 bit errors. */
/* */
/* INPUT */
/* */
/* nand_flash NAND flash instance */
/* page_buffer Page buffer */
/* ecc_buffer Returned ECC buffer */
/* */
/* OUTPUT */
/* */
/* return status */
/* */
/* CALLS */
/* */
/* _lx_nand_flash_256byte_ecc_check Check 256 bytes and ECC */
/* */
/* CALLED BY */
/* */
/* NAND flash driver */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 William E. Lamie Initial Version 6.0 */
/* */
/**************************************************************************/
UINT _lx_nand_flash_page_ecc_check(LX_NAND_FLASH *nand_flash, UCHAR *page_buffer, UCHAR *ecc_buffer)
{
UINT bytes_checked;
UINT status;
UINT return_status = LX_SUCCESS;
/* Loop to check the entire NAND flash page. */
bytes_checked = 0;
while (bytes_checked < nand_flash -> lx_nand_flash_bytes_per_page)
{
/* Check this 256 byte piece of the NAND page. */
status = _lx_nand_flash_256byte_ecc_check(page_buffer, ecc_buffer);
/* Determine if there was an error. */
if (status != LX_SUCCESS)
{
/* Determine if a non-correctable error is present. */
if (status == LX_NAND_ERROR_NOT_CORRECTED)
{
/* Always return a non-correctable error, if present. */
return_status = LX_NAND_ERROR_NOT_CORRECTED;
break;
}
/* A single-bit error was corrected, return this status
if there is no LX_ERROR status already detected. */
else if (return_status == LX_SUCCESS)
{
/* Return a notice that the single bit error was corrected. */
return_status = LX_NAND_ERROR_CORRECTED;
}
}
/* Move to the next 256 byte portion of the page. */
bytes_checked = bytes_checked + 256;
/* Move the page buffer forward. */
page_buffer = page_buffer + 256;
/* Move the ECC buffer forward, note there are 3 bytes of ECC per page. */
ecc_buffer = ecc_buffer + 3;
}
/* Return status. */
return(return_status);
}