怎么用u盘实现OTA升级，求大神指点

发布于 2020-04-23 22:26:43 浏览：2605 订阅该版

9 个回答

aozima 2020-04-24

调网络不抓包，调I2C等时序不上逻辑分析仪，就像电工不用万用表！多用整理的好的文字，比截图更省流量，还能在整理过程中思考。

晨起小酌 2020-04-24

这家伙很懒，什么也没写！

aozima 2020-04-24

调网络不抓包，调I2C等时序不上逻辑分析仪，就像电工不用万用表！多用整理的好的文字，比截图更省流量，还能在整理过程中思考。

踩姑娘的小蘑菇 2020-04-24

这家伙很懒，什么也没写！

晨起小酌 2020-04-25

这家伙很懒，什么也没写！

>我用过从SD卡把固件写到download分区，然后重启，可以正常更新的
>
>看报错感觉可能是没写到正确的位置，固 ...

---

/* 以只读模式打开文件 */
    fd = open("/rtthread.rbl", O_RDONLY);
    if (fd >= 0)
    {
        update_file_cur_size = 0;
        while(1)
        {
            /* 读取u盘的固件，一次读1024字节 */
            size = read(fd, buf, sizeof(buf));

rt_kprintf("Read from file rtthread.rbl : %s \n", buf);

/* 把固件写入片外flash的download分区  */
            if (fal_partition_write(dl_part, update_file_cur_size, buf, size) < 0)
            {
                LOG_E("Firmware download failed! Partition (%s) write data error!", dl_part->name);
                return RYM_CODE_CAN;
            }

update_file_cur_size += size;

if(size != sizeof(buf))
            {
                close(fd);
                break;
            }
        }
    }
    else
    {
        rt_kprintf("check: open file for read failed\n");
        return 0;
    }
    rt_kprintf("Download firmware to flash success.\n");
    rt_kprintf("System now will restart...\r\n");

/* wait some time for terminal response finish */
    rt_thread_delay(rt_tick_from_millisecond(200));

/* Reset the device, Start new firmware */
    extern void rt_hw_cpu_reset(void);
    rt_hw_cpu_reset();
    /* wait some time for terminal response finish */
    rt_thread_delay(rt_tick_from_millisecond(200));

return 0;

晨起小酌 2020-04-25

这家伙很懒，什么也没写！

踩姑娘的小蘑菇 2020-04-25

这家伙很懒，什么也没写！

```
static const struct fal_partition * dl_part = RT_NULL;
int update_file_to_flash_and_reboot(void)
{
    int count = 1;

rt_kprintf("program date:%s,%s\n",__DATE__, __TIME__);
	
		while(1)
		{
				if (dfs_mount("sd0", "/", "elm", 0, 0) == 0)
				{
						LOG_I("file system OK!\n");
						//sdcard OK
						break;
				}
				else
				{
						LOG_E("file system ERROR!\n");
				}
				 rt_thread_mdelay(1000);
		}
		
		rt_int32_t file_size = my_read_file_size("/rtthread.rbl");
		LOG_I("file size:%d",file_size);
		
		size_t update_file_cur_size=0;
		rt_uint8_t update_file_percentage = 0;
		
		if(file_size>0)
		{
			if ((dl_part = fal_partition_find("download")) == RT_NULL)
			{
				LOG_E("Firmware download failed! Partition (%s) find error!", "download");
				goto exit;
			}
			if (fal_partition_erase(dl_part, 0, file_size) < 0)
			{
					LOG_E("Firmware download failed! Partition (%s) erase error!", dl_part->name);
					goto exit;
			}
			
			
			int fd,read_size=0;
			uint8_t buf[512] = { 0 };

fd = open("/rtthread.rbl", O_RDWR);
			while(1)
			{
				read_size = read(fd,buf,512);
//				LOG_I("read size:%d",read_size);
				if (fal_partition_write(dl_part, update_file_cur_size, buf, read_size) < 0)
				{
						LOG_E("Firmware download failed! Partition (%s) write data error!", dl_part->name);
						goto exit;
				}
				rt_thread_mdelay(5);

update_file_cur_size += read_size;
				
				if(update_file_percentage!=(update_file_cur_size*100/file_size))
					LOG_I("[move firmware]%3d%%",update_file_percentage);
					
					update_file_percentage = update_file_cur_size*100/file_size;
				
				if(read_size != 512) break;
			}
			close(fd);
			unlink("/rtthread.rbl");
			
			  rt_thread_mdelay(200);

extern void rt_hw_cpu_reset(void);
        rt_hw_cpu_reset();
        rt_thread_mdelay(200);

}
		else
		{
			
			LOG_W("No rtthread.rbl");
		}
exit:
		LOG_I("file size to flash:%d",update_file_cur_size);

return RT_EOK;
}
```

这个是我的代码，也是从ota的代码里改来的:lol看起来你的没啥区别，可以用我这个改来试试