import RT-Thread@9217865c without bsp, libcpu and components/net
This commit is contained in:
Zihao Yu
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108
components/fal/samples/porting/README.md
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108
components/fal/samples/porting/README.md
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# Flash 设备及分区移植示例
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本示例主要演示 Flash 设备及分区相关的移植。
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## 1、Flash 设备
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在定义 Flash 设备表前，需要先定义 Flash 设备，参考 [`fal_flash_sfud_port.c`](fal_flash_sfud_port.c) （基于 [SFUD](https://github.com/armink/SFUD) 万能 SPI Flash 驱动的 Flash 设备）与 [`fal_flash_stm32f2_port.c`](fal_flash_stm32f2_port.c) （STM32F2 片内 Flash）这两个文件。这里简介下 `fal_flash_stm32f2_port.c` 里的代码实现。
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### 1.1 定义 Flash 设备
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针对 Flash 的不同操作，这里定义了如下几个操作函数：
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- `static int init(void)`：**可选** 的初始化操作
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- `static int read(long offset, uint8_t *buf, size_t size)`：读取操作
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|参数 |描述|
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|:----- |:----|
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|offset |读取数据的 Flash 偏移地址|
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|buf |存放待读取数据的缓冲区|
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|size |待读取数据的大小|
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|return |返回实际读取的数据大小|
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- `static int write(long offset, const uint8_t *buf, size_t size)` ：写入操作
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| 参数 | 描述 |
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| :----- | :------------------------ |
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| offset | 写入数据的 Flash 偏移地址 |
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| buf | 存放待写入数据的缓冲区 |
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| size | 待写入数据的大小 |
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| return | 返回实际写入的数据大小 |
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- `static int erase(long offset, size_t size)` ：擦除操作
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| 参数 | 描述 |
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| :----- | :------------------------ |
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| offset | 擦除区域的 Flash 偏移地址 |
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| size | 擦除区域的大小 |
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| return | 返回实际擦除的区域大小 |
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用户需要根据自己的 Flash 情况分别实现这些操作函数。在文件最底部定义了具体的 Flash 设备对象(stm32f2_onchip_flash)：
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`const struct fal_flash_dev stm32f2_onchip_flash = { "stm32_onchip", 0x08000000, 1024*1024, 128*1024, {init, read, write, erase} };`
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- `"stm32_onchip"` : Flash 设备的名字
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- 0x08000000: 对 Flash 操作的起始地址
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- 1024*1024：Flash 的总大小（1MB）
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- 128*1024：Flash 块/扇区大小（因为 STM32F2 各块大小不均匀，所以擦除粒度为最大块的大小：128K）
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- {init, read, write, erase} }：Flash 的操作函数。 如果没有 init 初始化过程，第一个操作函数位置可以置空。
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### 1.2 定义 Flash 设备表
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Flash 设备表定义在 `fal_cfg.h` 头文件中，定义分区表前需 **新建 `fal_cfg.h` 文件** 。
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参考 [示例文件 samples/porting/fal_cfg.h](samples/porting/fal_cfg.h) 或如下代码：
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```c
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/* ===================== Flash device Configuration ========================= */
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extern const struct fal_flash_dev stm32f2_onchip_flash;
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extern struct fal_flash_dev nor_flash0;
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/* flash device table */
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#define FAL_FLASH_DEV_TABLE \
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{ \
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&stm32f2_onchip_flash, \
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&nor_flash0, \
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}
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```
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Flash 设备表中，有两个 Flash 对象，一个为 STM32F2 的片内 Flash ，一个为片外的 Nor Flash。
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## 2、Flash 分区
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Flash 分区基于 Flash 设备，每个 Flash 设备又可以有 N 个分区，这些分区的集合就是分区表。在配置分区表前，务必保证已定义好 Flash 设备及设备表。
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分区表也定义在 `fal_cfg.h` 头文件中。参考 [示例文件 samples/porting/fal_cfg.h](samples/porting/fal_cfg.h) 或如下代码：
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```C
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#define NOR_FLASH_DEV_NAME "norflash0"
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/* ====================== Partition Configuration ========================== */
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#ifdef FAL_PART_HAS_TABLE_CFG
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/* partition table */
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#define FAL_PART_TABLE \
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{ \
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{FAL_PART_MAGIC_WORD, "bl", "stm32_onchip", 0, 64*1024, 0}, \
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{FAL_PART_MAGIC_WORD, "app", "stm32_onchip", 64*1024, 704*1024, 0}, \
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{FAL_PART_MAGIC_WORD, "easyflash", NOR_FLASH_DEV_NAME, 0, 1024*1024, 0}, \
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{FAL_PART_MAGIC_WORD, "download", NOR_FLASH_DEV_NAME, 1024*1024, 1024*1024, 0}, \
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}
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#endif /* FAL_PART_HAS_TABLE_CFG */
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```
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上面这个分区表详细描述信息如下：
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| 分区名 | Flash 设备名 | 偏移地址 | 大小 | 说明 |
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| :---------- | :------------- | :-------- | :---- | :----------------- |
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| "bl" | "stm32_onchip" | 0 | 64KB | 引导程序 |
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| "app" | "stm32_onchip" | 64*1024 | 704KB | 应用程序 |
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| "easyflash" | "norflash0" | 0 | 1MB | EasyFlash 参数存储 |
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| "download" | "norflash0" | 1024*1024 | 1MB | OTA 下载区 |
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用户需要修改的分区参数包括：分区名称、关联的 Flash 设备名、偏移地址（相对 Flash 设备内部）、大小，需要注意以下几点：
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- 分区名保证 **不能重复**
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- 关联的 Flash 设备 **务必已经在 Flash 设备表中定义好** ，并且 **名称一致** ，否则会出现无法找到 Flash 设备的错误
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- 分区的起始地址和大小 **不能超过 Flash 设备的地址范围** ，否则会导致包初始化错误
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> 注意：每个分区定义时，除了填写上面介绍的参数属性外，需在前面增加 `FAL_PART_MAGIC_WORD` 属性，末尾增加 `0` （目前用于保留功能）
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41
components/fal/samples/porting/fal_cfg.h
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41
components/fal/samples/porting/fal_cfg.h
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/*
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* Copyright (c) 2006-2018, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2018-05-17 armink the first version
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*/
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#ifndef _FAL_CFG_H_
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#define _FAL_CFG_H_
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#include <rtconfig.h>
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#include <board.h>
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#define NOR_FLASH_DEV_NAME "norflash0"
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/* ===================== Flash device Configuration ========================= */
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extern const struct fal_flash_dev stm32f2_onchip_flash;
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extern struct fal_flash_dev nor_flash0;
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/* flash device table */
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#define FAL_FLASH_DEV_TABLE \
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{ \
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&stm32f2_onchip_flash, \
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&nor_flash0, \
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}
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/* ====================== Partition Configuration ========================== */
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#ifdef FAL_PART_HAS_TABLE_CFG
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/* partition table */
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#define FAL_PART_TABLE \
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{ \
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{FAL_PART_MAGIC_WORD, "bl", "stm32_onchip", 0, 64*1024, 0}, \
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{FAL_PART_MAGIC_WORD, "app", "stm32_onchip", 64*1024, 704*1024, 0}, \
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{FAL_PART_MAGIC_WORD, "easyflash", NOR_FLASH_DEV_NAME, 0, 1024*1024, 0}, \
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{FAL_PART_MAGIC_WORD, "download", NOR_FLASH_DEV_NAME, 1024*1024, 1024*1024, 0}, \
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}
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#endif /* FAL_PART_HAS_TABLE_CFG */
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#endif /* _FAL_CFG_H_ */
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96
components/fal/samples/porting/fal_flash_sfud_port.c
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96
components/fal/samples/porting/fal_flash_sfud_port.c
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/*
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* Copyright (c) 2006-2018, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2018-01-26 armink the first version
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*/
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#include <fal.h>
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#include <sfud.h>
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#ifdef FAL_USING_SFUD_PORT
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#ifdef RT_USING_SFUD
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#include <spi_flash_sfud.h>
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#endif
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#ifndef FAL_USING_NOR_FLASH_DEV_NAME
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#define FAL_USING_NOR_FLASH_DEV_NAME "norflash0"
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#endif
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static int init(void);
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static int read(long offset, uint8_t *buf, size_t size);
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static int write(long offset, const uint8_t *buf, size_t size);
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static int erase(long offset, size_t size);
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static sfud_flash_t sfud_dev = NULL;
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struct fal_flash_dev nor_flash0 =
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{
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.name = FAL_USING_NOR_FLASH_DEV_NAME,
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.addr = 0,
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.len = 8 * 1024 * 1024,
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.blk_size = 4096,
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.ops = {init, read, write, erase},
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.write_gran = 1
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};
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static int init(void)
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{
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#ifdef RT_USING_SFUD
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/* RT-Thread RTOS platform */
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sfud_dev = rt_sfud_flash_find_by_dev_name(FAL_USING_NOR_FLASH_DEV_NAME);
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#else
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/* bare metal platform */
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extern sfud_flash sfud_norflash0;
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sfud_dev = &sfud_norflash0;
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#endif
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if (NULL == sfud_dev)
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{
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return -1;
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}
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/* update the flash chip information */
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nor_flash0.blk_size = sfud_dev->chip.erase_gran;
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nor_flash0.len = sfud_dev->chip.capacity;
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return 0;
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}
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static int read(long offset, uint8_t *buf, size_t size)
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{
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assert(sfud_dev);
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assert(sfud_dev->init_ok);
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sfud_read(sfud_dev, nor_flash0.addr + offset, size, buf);
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return size;
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}
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static int write(long offset, const uint8_t *buf, size_t size)
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{
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assert(sfud_dev);
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assert(sfud_dev->init_ok);
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if (sfud_write(sfud_dev, nor_flash0.addr + offset, size, buf) != SFUD_SUCCESS)
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{
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return -1;
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}
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return size;
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}
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static int erase(long offset, size_t size)
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{
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assert(sfud_dev);
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assert(sfud_dev->init_ok);
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if (sfud_erase(sfud_dev, nor_flash0.addr + offset, size) != SFUD_SUCCESS)
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{
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return -1;
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}
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return size;
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}
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#endif /* FAL_USING_SFUD_PORT */
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198
components/fal/samples/porting/fal_flash_stm32f2_port.c
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198
components/fal/samples/porting/fal_flash_stm32f2_port.c
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/*
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* Copyright (c) 2006-2018, RT-Thread Development Team
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*
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* SPDX-License-Identifier: Apache-2.0
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*
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* Change Logs:
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* Date Author Notes
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* 2018-01-26 armink the first version
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*/
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#include <fal.h>
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#include <stm32f2xx.h>
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/* base address of the flash sectors */
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#define ADDR_FLASH_SECTOR_0 ((uint32_t)0x08000000) /* Base address of Sector 0, 16 K bytes */
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#define ADDR_FLASH_SECTOR_1 ((uint32_t)0x08004000) /* Base address of Sector 1, 16 K bytes */
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#define ADDR_FLASH_SECTOR_2 ((uint32_t)0x08008000) /* Base address of Sector 2, 16 K bytes */
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#define ADDR_FLASH_SECTOR_3 ((uint32_t)0x0800C000) /* Base address of Sector 3, 16 K bytes */
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#define ADDR_FLASH_SECTOR_4 ((uint32_t)0x08010000) /* Base address of Sector 4, 64 K bytes */
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#define ADDR_FLASH_SECTOR_5 ((uint32_t)0x08020000) /* Base address of Sector 5, 128 K bytes */
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#define ADDR_FLASH_SECTOR_6 ((uint32_t)0x08040000) /* Base address of Sector 6, 128 K bytes */
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#define ADDR_FLASH_SECTOR_7 ((uint32_t)0x08060000) /* Base address of Sector 7, 128 K bytes */
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#define ADDR_FLASH_SECTOR_8 ((uint32_t)0x08080000) /* Base address of Sector 8, 128 K bytes */
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#define ADDR_FLASH_SECTOR_9 ((uint32_t)0x080A0000) /* Base address of Sector 9, 128 K bytes */
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#define ADDR_FLASH_SECTOR_10 ((uint32_t)0x080C0000) /* Base address of Sector 10, 128 K bytes */
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#define ADDR_FLASH_SECTOR_11 ((uint32_t)0x080E0000) /* Base address of Sector 11, 128 K bytes */
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/**
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* Get the sector of a given address
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*
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* @param address flash address
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*
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* @return The sector of a given address
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*/
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static uint32_t stm32_get_sector(uint32_t address)
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{
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uint32_t sector = 0;
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if ((address < ADDR_FLASH_SECTOR_1) && (address >= ADDR_FLASH_SECTOR_0))
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{
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sector = FLASH_Sector_0;
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}
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else if ((address < ADDR_FLASH_SECTOR_2) && (address >= ADDR_FLASH_SECTOR_1))
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{
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sector = FLASH_Sector_1;
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}
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else if ((address < ADDR_FLASH_SECTOR_3) && (address >= ADDR_FLASH_SECTOR_2))
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{
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sector = FLASH_Sector_2;
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}
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else if ((address < ADDR_FLASH_SECTOR_4) && (address >= ADDR_FLASH_SECTOR_3))
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{
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sector = FLASH_Sector_3;
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}
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else if ((address < ADDR_FLASH_SECTOR_5) && (address >= ADDR_FLASH_SECTOR_4))
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{
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sector = FLASH_Sector_4;
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}
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else if ((address < ADDR_FLASH_SECTOR_6) && (address >= ADDR_FLASH_SECTOR_5))
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{
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sector = FLASH_Sector_5;
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}
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else if ((address < ADDR_FLASH_SECTOR_7) && (address >= ADDR_FLASH_SECTOR_6))
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{
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sector = FLASH_Sector_6;
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}
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else if ((address < ADDR_FLASH_SECTOR_8) && (address >= ADDR_FLASH_SECTOR_7))
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{
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sector = FLASH_Sector_7;
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}
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else if ((address < ADDR_FLASH_SECTOR_9) && (address >= ADDR_FLASH_SECTOR_8))
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{
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sector = FLASH_Sector_8;
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}
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else if ((address < ADDR_FLASH_SECTOR_10) && (address >= ADDR_FLASH_SECTOR_9))
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{
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sector = FLASH_Sector_9;
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}
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else if ((address < ADDR_FLASH_SECTOR_11) && (address >= ADDR_FLASH_SECTOR_10))
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{
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sector = FLASH_Sector_10;
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}
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else
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{
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sector = FLASH_Sector_11;
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}
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return sector;
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||||
}
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/**
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* Get the sector size
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*
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* @param sector sector
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*
|
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* @return sector size
|
||||
*/
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static uint32_t stm32_get_sector_size(uint32_t sector) {
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assert(IS_FLASH_SECTOR(sector));
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switch (sector) {
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case FLASH_Sector_0: return 16 * 1024;
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case FLASH_Sector_1: return 16 * 1024;
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case FLASH_Sector_2: return 16 * 1024;
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case FLASH_Sector_3: return 16 * 1024;
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case FLASH_Sector_4: return 64 * 1024;
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case FLASH_Sector_5: return 128 * 1024;
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case FLASH_Sector_6: return 128 * 1024;
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case FLASH_Sector_7: return 128 * 1024;
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case FLASH_Sector_8: return 128 * 1024;
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case FLASH_Sector_9: return 128 * 1024;
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case FLASH_Sector_10: return 128 * 1024;
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case FLASH_Sector_11: return 128 * 1024;
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default : return 128 * 1024;
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}
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}
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static int init(void)
|
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{
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||||
/* do nothing now */
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||||
}
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||||
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static int read(long offset, uint8_t *buf, size_t size)
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{
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size_t i;
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uint32_t addr = stm32f2_onchip_flash.addr + offset;
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for (i = 0; i < size; i++, addr++, buf++)
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||||
{
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*buf = *(uint8_t *) addr;
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}
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return size;
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||||
}
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||||
static int write(long offset, const uint8_t *buf, size_t size)
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{
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size_t i;
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||||
uint32_t read_data;
|
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uint32_t addr = stm32f2_onchip_flash.addr + offset;
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||||
FLASH_Unlock();
|
||||
FLASH_ClearFlag(
|
||||
FLASH_FLAG_EOP | FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR | FLASH_FLAG_PGAERR | FLASH_FLAG_PGPERR
|
||||
| FLASH_FLAG_PGSERR);
|
||||
for (i = 0; i < size; i++, buf++, addr++)
|
||||
{
|
||||
/* write data */
|
||||
FLASH_ProgramByte(addr, *buf);
|
||||
read_data = *(uint8_t *) addr;
|
||||
/* check data */
|
||||
if (read_data != *buf)
|
||||
{
|
||||
return -1;
|
||||
}
|
||||
}
|
||||
FLASH_Lock();
|
||||
|
||||
return size;
|
||||
}
|
||||
|
||||
static int erase(long offset, size_t size)
|
||||
{
|
||||
FLASH_Status flash_status;
|
||||
size_t erased_size = 0;
|
||||
uint32_t cur_erase_sector;
|
||||
uint32_t addr = stm32f2_onchip_flash.addr + offset;
|
||||
|
||||
/* start erase */
|
||||
FLASH_Unlock();
|
||||
FLASH_ClearFlag(
|
||||
FLASH_FLAG_EOP | FLASH_FLAG_OPERR | FLASH_FLAG_WRPERR | FLASH_FLAG_PGAERR | FLASH_FLAG_PGPERR
|
||||
| FLASH_FLAG_PGSERR);
|
||||
/* it will stop when erased size is greater than setting size */
|
||||
while (erased_size < size)
|
||||
{
|
||||
cur_erase_sector = stm32_get_sector(addr + erased_size);
|
||||
flash_status = FLASH_EraseSector(cur_erase_sector, VoltageRange_3);
|
||||
if (flash_status != FLASH_COMPLETE)
|
||||
{
|
||||
return -1;
|
||||
}
|
||||
erased_size += stm32_get_sector_size(cur_erase_sector);
|
||||
}
|
||||
FLASH_Lock();
|
||||
|
||||
return size;
|
||||
}
|
||||
|
||||
const struct fal_flash_dev stm32f2_onchip_flash =
|
||||
{
|
||||
.name = "stm32_onchip",
|
||||
.addr = 0x08000000,
|
||||
.len = 1024*1024,
|
||||
.blk_size = 128*1024,
|
||||
.ops = {init, read, write, erase},
|
||||
.write_gran = 8
|
||||
};
|
||||
|
||||
Loading…
Add table
Add a link
Reference in a new issue