chentianya/levelx
1
0
Fork 0
mirror of https://github.com/eclipse-threadx/levelx.git synced 2026-09-14 12:37:01 +08:00
Code Issues Packages Projects Releases Wiki Activity

Initial commit

Browse Source
This commit is contained in:
PProvost
2020-05-11 08:49:43 -06:00
commit 6f4ea0561f
65 changed files with 14775 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files
common/src/lx_nor_flash_driver_write.c
+141
View File
@@ -0,0 +1,141 @@
/**************************************************************************/
/* */
/* 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 */
/** */
/** NOR 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_nor_flash_driver_write PORTABLE C */
/* 6.0 */
/* AUTHOR */
/* */
/* William E. Lamie, Microsoft Corporation */
/* */
/* DESCRIPTION */
/* */
/* This function performs a write of the NOR flash memory. */
/* */
/* INPUT */
/* */
/* nor_flash NOR flash instance */
/* flash_address Address of NOR flash to write */
/* source Source for the write */
/* words Number of words to write */
/* */
/* OUTPUT */
/* */
/* return status */
/* */
/* CALLS */
/* */
/* (lx_nor_flash_driver_write) Actual driver write */
/* */
/* CALLED BY */
/* */
/* Application Code */
/* */
/* RELEASE HISTORY */
/* */
/* DATE NAME DESCRIPTION */
/* */
/* 05-19-2020 William E. Lamie Initial Version 6.0 */
/* */
/**************************************************************************/
UINT _lx_nor_flash_driver_write(LX_NOR_FLASH *nor_flash, ULONG *flash_address, ULONG *source, ULONG words)
{
#ifndef LX_NOR_DISABLE_EXTENDED_CACHE
UINT status;
UINT i;
ULONG *cache_entry_start;
ULONG *cache_entry_end;
ULONG cache_offset;
/* Is the request a whole sector or a partial sector. */
if ((words == 1) && (nor_flash -> lx_nor_flash_extended_cache_entries))
{
/* One word request, which implies that it is a NOR flash metadata write. */
/* Loop through the cache entries to see if there is a sector in cache. */
for (i = 0; i < nor_flash -> lx_nor_flash_extended_cache_entries; i++)
{
/* Search through the cache to see if there is a cache entry. */
/* Determine the cache entry addresses. */
cache_entry_start = nor_flash -> lx_nor_flash_extended_cache[i].lx_nor_flash_extended_cache_entry_sector_address;
cache_entry_end = cache_entry_start + LX_NOR_SECTOR_SIZE;
/* Determine if the flash address in in the cache entry. */
if ((cache_entry_start) && (flash_address >= cache_entry_start) && (flash_address < cache_entry_end))
{
/* Yes, we found the entry. */
/* Calculate the offset into the cache entry. */
cache_offset = (ULONG)(flash_address - cache_entry_start);
/* Copy the word into the cache. */
*(nor_flash -> lx_nor_flash_extended_cache[i].lx_nor_flash_extended_cache_entry_sector_memory + cache_offset) = *source;
/* Get out of the loop. */
break;
}
}
}
/* In any case, call the actual driver write function. */
status = (nor_flash -> lx_nor_flash_driver_write)(flash_address, source, words);
/* Return completion status. */
return(status);
#else
UINT status;
/* Call the actual driver write function. */
status = (nor_flash -> lx_nor_flash_driver_write)(flash_address, source, words);
/* Return completion status. */
return(status);
#endif
}