10 如何确定文件在flash中的物理地址

#include <rtthread.h>
#include <rtdevice.h>
#include <board.h>
#include <fal.h>
#include <dfs_fs.h>
#include <dfs_posix.h>
#include "dfs_file.h"
#include <stdio.h>
#include <stdlib.h>
#define DBG_TAG "ota"
#define DBG_LVL DBG_INFO // DBG_LOG, DBG_INFO, DBG_WARNING, DBG_ERROR
#include <rtdbg.h>       // this line must after -> #define DBG_TAG
#define DATA_PARTITION_NAME "download"
#define APP_PARTITION_NAME "app"
typedef void (*pFunction)(void);
static const struct fal_partition *dl_part = RT_NULL;
static char *recv_partition = APP_PARTITION_NAME;
pFunction JumpToApplication;
uint32_t JumpAddress;
rt_thread_t tidOTA;
void ota(void *parameter)
{
    static struct stat stat_buf;
    static struct dfs_fd fd;
    uint32_t length;
    uint32_t pos = 0;
    char buffer[100];
    if (stat("os.bin", &stat_buf) == 0)
    {
        LOG_I("find new firmware file os.bin!");
        LOG_I("OS file size = %d", stat_buf.st_size);
        /* find app partition */
        if ((dl_part = fal_partition_find(recv_partition)) == RT_NULL)
        {
            LOG_E("APP partition (%s) find error!", recv_partition);
            return;
        }
        /* check os size */
        if (stat_buf.st_size > dl_part->len)
        {
            LOG_E("Firmware is too large! File size (%d), '%s' partition size (%d)", stat_buf.st_size, recv_partition, dl_part->len);
            return;
        }
        /* erase app partition */
        LOG_I("Start erase. Size (%d)", stat_buf.st_size);
        if (fal_partition_erase(dl_part, 0, stat_buf.st_size) < 0)
        {
            LOG_E("Firmware download failed! Partition (%s) erase error!", dl_part->name);
            return;
        }
        /* copy os file from download to app partition */
        if (dfs_file_open(&fd, "/os.bin", O_RDONLY) < 0)
        {
            LOG_E("Open %s failed!", "/os.bin");
        }
        do
        {
            memset(buffer, 0, sizeof(buffer));
            length = dfs_file_read(&fd, buffer, sizeof(buffer));
            if (length > 0)
            {
                fal_partition_write(dl_part, pos, (uint8_t *)buffer, sizeof(buffer));
                pos += length;
            }
        } while (length > 0);
        dfs_file_close(&fd);
        /* remove the os file */
        if(dfs_file_unlink("os.bin") != 0)
        {
            LOG_E("Romove os.bin file fail!");
        }
        /* restart bootloader to jump to app */
        LOG_I("OS file loaded successfully!");
        LOG_W("About to restart...");
        rt_thread_mdelay(100);
        rt_hw_cpu_reset();
    }
    else
    {
        LOG_W("NOT find new firmware file!");
        LOG_I("Start program execution...");
        /* Test if user code is programmed starting from address "RT_APP_PART_ADDR" */
        if (((*(__IO uint32_t *)RT_APP_PART_ADDR) & 0x2FFE0000) == 0x20000000)
        {
            /* Jump to user application */
            JumpAddress = *(__IO uint32_t *)(RT_APP_PART_ADDR + 4);
            JumpToApplication = (pFunction)JumpAddress;
            /* Initialize user application's Stack Pointer */
            __set_MSP(*(__IO uint32_t *)RT_APP_PART_ADDR);
            JumpToApplication();
        }
    }
}
int ota_entry(void)
{
    tidOTA = rt_thread_create("ota", ota, RT_NULL, 1024, 11, 10);
    if (tidOTA != RT_NULL)
    {
        rt_thread_startup(tidOTA);
    }
    else
    {
        if (tidOTA)
            rt_thread_delete(tidOTA);
        return -RT_ERROR;
    }
    return RT_EOK;
}