【FlashDB】第一步 FlashDB 移植到 STM32L475 使用QSPI驱动外部 flash W25Q64之FAL移植

文章目录[隐藏]

准备工作
1. FlashDB是基于FAL Flash抽象层，首先对FAL的移植：
2. FAL重要部分说明：
3. 配置FAL的分区和分区大小
4. FAL是基于 SFUD 移植，请看第二步

准备工作

1. FlashDB是基于FAL Flash抽象层，首先对FAL的移植：

FAL介绍
FAL (Flash Abstraction Layer) Flash 抽象层，是对 Flash 及基于 Flash
的分区进行管理、操作的抽象层，对上层统一了 Flash 及分区操作的 API (框架图如下所示)，并具有以下特性：

支持静态可配置的分区表，并可关联多个 Flash 设备；

分区表支持自动装载。避免在多固件项目，分区表被多次定义的问题；

代码精简，对操作系统无依赖，可运行于裸机平台，比如对资源有一定要求的 Bootloader；

统一的操作接口。保证了文件系统、OTA、NVM（例如：EasyFlash）等对 Flash 有一定依赖的组件，底层 Flash 驱动的可重用性；自带基于 Finsh/MSH 的测试命令，可以通过 Shell 按字节寻址的方式操作（读写擦） Flash
或分区，方便开发者进行调试、测试

首先先完成FAL文件管理系统工作的移植

移植FAL文件说明和下载包链接如下：

https://gitee.com/RT-Thread-Mirror/fal/tree/master

2. FAL重要部分说明：

2.1在FAL例程目录中我们使用以下这个文件作为我们的移植使用文件：

2.2 搭建完成MDK开发环境后，打开 fal_flash_sfud_port.c 文件

2.3 红框部分使我们的设备名字和要初始化的一些相关参数

图中指示说明：

设备的名字，可以自己随意取，但是不能超过长度限制

W25Q64的实际FLASH大小

W25Q64一个擦除的扇区是多大

设备的初始化，设备flash读写擦除

写颗粒度W25Q默认1

3. 配置FAL的分区和分区大小

3.1打开以下 fal_cfg.h 文件

3.2 配置flash的分区和分区大小

图中指示说明：

设备的名字，建议当前分区用哪个设备起对应的名字，跟 5 对应上

初始化的设备驱动表，跟图2.3对上

魔术字，默认即可

分区的名字，建议自己使用的分区储存什么对应的文件，起对应相关的文件名字

flash设备的名字，建议分区对应的Flash设备起对应flash设备的名字

分区的起始地址

分区的大小，同一个flash设备有多个分区的话，建议当前分区首地址是上一个分区的地址的大小

默认0即可

4. FAL是基于 SFUD 移植，请看第二步

【FlashDB】第二步 FlashDB 移植 STM32L475 使用QSPI驱动外部 flash W25Q64之 SFUD 移植

下边是 fal_flash_sfud_port.c 的接口代码

/*
 * File      : fal_flash_sfud_port.c
 * This file is part of FAL (Flash Abstraction Layer) package
 * COPYRIGHT (C) 2006 - 2018, RT-Thread Development Team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Change Logs:
 * Date           Author       Notes
 * 2018-01-26     armink       the first version
 */

#include <fal.h>
#include <sfud.h>

#define  FAL_USING_SFUD_PORT

#ifdef FAL_USING_SFUD_PORT
#ifdef RT_USING_SFUD
#include <spi_flash_sfud.h>
#endif

#ifndef FAL_USING_NOR_FLASH_DEV_NAME
#define FAL_USING_NOR_FLASH_DEV_NAME             "norflash0"
#endif

static int init(void);
static int read(long offset, uint8_t *buf, size_t size);
static int write(long offset, const uint8_t *buf, size_t size);
static int erase(long offset, size_t size);

static sfud_flash_t sfud_dev = NULL;


struct fal_flash_dev nor_flash0 =
{
    .name       = FAL_USING_NOR_FLASH_DEV_NAME,
    .addr       = 0,
    .len        = 8 * 1024 * 1024,
    .blk_size   = 4096,
    .ops        = {init, read, write, erase},
    .write_gran = 1
};

static int init(void)
{
	  if (sfud_init() == SFUD_SUCCESS)
    {
        /* enable qspi fast read mode, set four data lines width */
				sfud_dev = sfud_get_device(SFUD_W25_DEVICE_INDEX);
        sfud_qspi_fast_read_enable(sfud_dev, 4);
    }	
			
    if (NULL == sfud_dev)
    {
        return -1;
    }

    /* update the flash chip information */
	nor_flash0.blk_size = sfud_dev->chip.erase_gran;
	nor_flash0.len = sfud_dev->chip.capacity;

    return 0;
}

static int read(long offset, uint8_t *buf, size_t size)
{
    assert(sfud_dev);
    assert(sfud_dev->init_ok);
    sfud_read(sfud_dev, nor_flash0.addr + offset, size, buf);

    return size;
}

static int write(long offset, const uint8_t *buf, size_t size)
{
    assert(sfud_dev);
    assert(sfud_dev->init_ok);
    if (sfud_write(sfud_dev, nor_flash0.addr + offset, size, buf) != SFUD_SUCCESS)
    {
        return -1;
    }

    return size;
}

static int erase(long offset, size_t size)
{
    assert(sfud_dev);
    assert(sfud_dev->init_ok);
    if (sfud_erase(sfud_dev, nor_flash0.addr + offset, size) != SFUD_SUCCESS)
    {
        return -1;
    }

    return size;
}
#endif /* FAL_USING_SFUD_PORT */

下边是 fal_cfg.h 的配置代码

/*
 * File      : fal_cfg.h
 * This file is part of FAL (Flash Abstraction Layer) package
 * COPYRIGHT (C) 2006 - 2018, RT-Thread Development Team
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Change Logs:
 * Date           Author       Notes
 * 2018-05-17     armink       the first version
 */

#ifndef _FAL_CFG_H_
#define _FAL_CFG_H_


#define FAL_DEBUG 1
#define FAL_PART_HAS_TABLE_CFG

#define NOR_FLASH_DEV_NAME             "norflash0"

/* ===================== Flash device Configuration ========================= */
extern struct fal_flash_dev nor_flash0;

/* flash device table */
#define FAL_FLASH_DEV_TABLE                                          \
{                                                                    \
    &nor_flash0,                                                     \
}
/* ====================== Partition Configuration ========================== */
#ifdef FAL_PART_HAS_TABLE_CFG
/* partition table */
#define FAL_PART_TABLE                                                               \
{                                                                                    \
		{FAL_PART_MAGIC_WORD, "KVDB", NOR_FLASH_DEV_NAME, 							0, 1 * 1024 * 1024, 0},  \
    {FAL_PART_MAGIC_WORD, "TSDB", NOR_FLASH_DEV_NAME, 1 * 1024 * 1024, 4 * 1024 * 1024, 0} 		\
}
#endif /* FAL_PART_HAS_TABLE_CFG */

#endif /* _FAL_CFG_H_ */