20 OTA下载后APP跳转后FAL分区检测失败

发布于 2022-04-21 10:37:47 浏览：939 订阅该版

使用OTA更新APP代码后跳转到APP程序运行时FAL分区识别不了。具体执行流程如下。

1、无OTA程序时APP程序编写运行串口信息输出如下
![image.png](https://oss-club.rt-thread.org/uploads/20220421/809dda1febb8eb49f31b10f998da8165.png)

2、使用RTT官方的IOT进行BootLoader生成
![image.png](https://oss-club.rt-thread.org/uploads/20220421/f46036cb3870ee9f29c9a8ccbe1cc9d8.png.webp)

![image.png](https://oss-club.rt-thread.org/uploads/20220421/379240d573e51c9d76838a121c25c617.png)

3、使用st-link下载BootLoader代码，串口打印信息如下
![image.png](https://oss-club.rt-thread.org/uploads/20220421/a15864fe5c9a166ae4fb899c43250f73.png)

4、使能APP的ota功能，修改APP代码启动地址等相关信息
![image.png](https://oss-club.rt-thread.org/uploads/20220421/f92b9f2b20aa911195027e6373929351.png)

![image.png](https://oss-club.rt-thread.org/uploads/20220421/b7c05a55355f997c670b21832e084311.png)

增加跳转代码如下
```
/**
 * Function    ota_app_vtor_reconfig
 * Description Set Vector Table base location to the start addr of app(RT_APP_PART_ADDR).
*/
static int ota_app_vtor_reconfig(void)
{
    #define NVIC_VTOR_MASK   0x3FFFFF80
    /* Set the Vector Table base location by user application firmware definition */
    SCB->VTOR = RT_APP_PART_ADDR & NVIC_VTOR_MASK;
 
    return 0;
}
INIT_BOARD_EXPORT(ota_app_vtor_reconfig);
```
下载APP代码运行正常，串口打印信息如下：
![image.png](https://oss-club.rt-thread.org/uploads/20220421/d22d14f7ae4a1f64d80888d391caab55.png)

5、制作固件包
![image.png](https://oss-club.rt-thread.org/uploads/20220421/e828f084e6c561c9f4eb11dfcaa4a4be.png.webp)

6、ymodem下载程序验证
![image.png](https://oss-club.rt-thread.org/uploads/20220421/54ba7a902dd0b974104fbb368840f783.png)

通过ymodem更新代码后FAL初始化成功，查找到SPI flash 但是分区表不争取。