littlefs文件系统github地址
https://github.com/littlefs-project/littlefs
其实我是从Ai-M6X_SDK_release_AiPi_Eyes_SDK里移植出来
压缩包里有components和例程，要把components下的放到AI——WB2 SDK下的components
如图
例程放在
components增加了bouffalo.mk
# Component Makefile
#
## These include paths would be exported to project level
COMPONENT_ADD_INCLUDEDIRS += port littlefs littlefs/bd
## not be exported to project level
COMPONENT_PRIV_INCLUDEDIRS :=
## This component's src
COMPONENT_SRCS := port/lfs_xip_flash.c littlefs/lfs.c littlefs/lfs_util.c littlefs/bd/lfs_filebd.c littlefs/bd/lfs_rambd.c littlefs/bd/lfs_testbd.c
COMPONENT_OBJS := $(patsubst %.c,%.o, $(COMPONENT_SRCS))
COMPONENT_SRCDIRS := port littlefs littlefs/bd
##
#CPPFLAGS +=
修改了lfs_xip_flash.c
#include "lfs.h"
//#include "bflb_flash.h"
//#include "bflb_l1c.h"
#include <hosal_flash.h>
#define CONFIG_LITTLEFS_FLASH_ADDRESS 0x210000
#ifndef CONFIG_LITTLEFS_FLASH_ADDRESS
#error "must define CONFIG_LITTLEFS_FLASH_ADDRESS"
#endif
/*****************************************************************************
* @brief Read a region in a block. Negative error codes are propagated
* to the user.
* @param[in] c
* @param[in] block
* @param[in] off
* @param[out] buffer
* @param[in] size
*
* @retval int
*****************************************************************************/
int lfs_xip_flash_read(const struct lfs_config *c, lfs_block_t block,
lfs_off_t off, void *buffer, lfs_size_t size)
{
return hosal_flash_raw_read((uint8_t *)buffer, CONFIG_LITTLEFS_FLASH_ADDRESS + block * c->block_size + off, size);
}
/*****************************************************************************
* @brief Program a region in a block. The block must have previously
* been erased. Negative error codes are propagated to the user.
* May return LFS_ERR_CORRUPT if the block should be considered bad.
* @param[in] c
* @param[in] block
* @param[in] off
* @param[in] buffer
* @param[in] size
*
* @retval int
*****************************************************************************/
int lfs_xip_flash_prog(const struct lfs_config *c, lfs_block_t block,
lfs_off_t off, const void *buffer, lfs_size_t size)
{
return hosal_flash_raw_write((uint8_t *)buffer, CONFIG_LITTLEFS_FLASH_ADDRESS + block * c->block_size + off, size);
}
/*****************************************************************************
* @brief Erase a block. A block must be erased before being programmed.
* The state of an erased block is undefined. Negative error codes
* are propagated to the user.
* May return LFS_ERR_CORRUPT if the block should be considered bad.
* @param[in] c
* @param[in] block
*
* @retval int
*****************************************************************************/
int lfs_xip_flash_erase(const struct lfs_config *c, lfs_block_t block)
{
return hosal_flash_raw_erase(CONFIG_LITTLEFS_FLASH_ADDRESS + block * c->block_size, c->block_size);
}
/*****************************************************************************
* @brief Sync the state of the underlying block device. Negative error
* codes are propagated to the user.
* @param[in] c
*
* @retval int
*****************************************************************************/
int lfs_xip_flash_sync(const struct lfs_config *c)
{
/*!< if use xip, may need to clean cache */
return 0;
}
main()创建littlefs任务
xTaskCreate(littlefs_task, (char*)"littlefs_task", 512, NULL, 13, NULL);//任务优先级数值越小，优先级越低
littlefs任务做了个简单测试
/****************************************************************************
*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership. The
* ASF licenses this file to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the
* License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
****************************************************************************/
/****************************************************************************
* Included Files
****************************************************************************/
#include "FreeRTOS.h"
#include "task.h"
#include "littlefs_task.h"
#include "lfs.h"
#include "lfs_port.h"
#include <blog.h>
/*
组件log开关
静态开关 在相应的 proj_config.mk 文件目录下，LOG_ENABLED_COMPONENTS配置上增加对应组件的名字 例如这里需要增加blog_testc组件静态开关，其他组件默认关闭 LOG_ENABLED_COMPONENTS:=blog_testc
*/
/*
文件log管理
//#define BLOG_HARD_DECLARE_DISABLE 1 // 关
*/
/*
私有log管理
静态开关 使用就增加BLOG_DECLARE(…)，不用直接不增加此行即可。 BLOG_DECLARE(blog_testc2); // 打开，其中 "blog_testc2"为用户自定义
//BLOG_DECLARE(main);
*/
/*
调整等级
blog_set_level_log_component(BLOG_LEVEL_ALL, "blog_demo");
*/
BLOG_DECLARE(littlefs);//必需定义？???
/****************************************************************************
* Pre-processor Definitions
****************************************************************************/
/*!< use memory area after 512k */
#define LITTLEFS_FLASH_SIZE (0x28000)
#define LITTLEFS_FLASH_BLOCK_SIZE 4096
#define LITTLEFS_FLASH_BLOCK_COUNT (LITTLEFS_FLASH_SIZE / LITTLEFS_FLASH_BLOCK_SIZE)
#define LITTLEFS_FLASH_BLOCK_CYCLE 500
/****************************************************************************
* Private Data
****************************************************************************/
lfs_t lfs;
lfs_file_t file;
/*!< configuration of the filesystem is provided by this struct */
const struct lfs_config cfg = {
// block device operations
.read = lfs_xip_flash_read,
.prog = lfs_xip_flash_prog,
.erase = lfs_xip_flash_erase,
.sync = lfs_xip_flash_sync,
// block device configuration
.read_size = 16,
.prog_size = 16,
.lookahead_size = 16,
.cache_size = 16,
.block_size = LITTLEFS_FLASH_BLOCK_SIZE,
.block_count = LITTLEFS_FLASH_BLOCK_COUNT,
.block_cycles = LITTLEFS_FLASH_BLOCK_CYCLE,
};
/****************************************************************************
* Private Function Prototypes
****************************************************************************/
/****************************************************************************
* Functions
****************************************************************************/
void littlefs_task(void *pvParameters)
{
blog_info_user(littlefs,"mount the filesystem");
// mount the filesystem
int err = lfs_mount(&lfs, &cfg);
// reformat if we can't mount the filesystem
// this should only happen on the first boot
if (err) {
blog_error_user(littlefs,"try to reformat");
err = lfs_format(&lfs, &cfg);
if (err) {
blog_error_user(littlefs,"reformat fail");
vTaskDelete(NULL);
}
blog_info_user(littlefs,"reformat success");
blog_info_user(littlefs,"try mount the filesystem");
err = lfs_mount(&lfs, &cfg);
if (err) {
blog_error_user(littlefs,"try mount fail");
vTaskDelete(NULL);
}
}
blog_info_user(littlefs,"mount success");
// read current count
uint32_t boot_count = 0;
lfs_file_open(&lfs, &file, "boot_count", LFS_O_RDWR | LFS_O_CREAT);
lfs_file_read(&lfs, &file, &boot_count, sizeof(boot_count));
// update boot count
boot_count += 1;
lfs_file_rewind(&lfs, &file);
lfs_file_write(&lfs, &file, &boot_count, sizeof(boot_count));
// remember the storage is not updated until the file is closed successfully
lfs_file_close(&lfs, &file);
// release any resources we were using
// lfs_unmount(&lfs);
// print the boot count
printf("boot_count: %d\n", boot_count);
vTaskDelete(NULL);
while (1) {
vTaskDelay(1000 / portTICK_PERIOD_MS);
}
}
感谢
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