10 RT-Thread Bootloader问题

发布于 2024-12-26 11:11:16 浏览：390 订阅该版

使用github上下的源码在Keil中做的bootloader代码。使用时发现一个奇怪的问题

```c
    unsigned int LCRCInt;
    char LCRCInt1;
    Device_InfoDataStruct atcrc;
    INT_FlashRead(sizeof(lUpdataFlag), (uint8_t *)&lUpdataFlag, VERINFOSTARTADRESS);
    rt_kprintf("lUpdataFlag.Program_update_flag_bit = %d\n", lUpdataFlag.Program_update_flag_bit);
    rt_kprintf("lUpdataFlag.Program_CRC_check = %u\n", lUpdataFlag.Program_CRC_check);
    rt_kprintf("lUpdataFlag.Software_length = %d\n", lUpdataFlag.Software_length);
    if (lUpdataFlag.Program_update_flag_bit != UPDATAEN) // 不需要升级，则跳转主程序,更新标志位
    {
        rt_kprintf("lUpdataFlag.Program_update_flag_bit = %d\n", lUpdataFlag.Program_update_flag_bit);
        rt_kprintf("lUpdataFlag.Program_CRC_check = %u\n", lUpdataFlag.Program_CRC_check);
        iap_load_app(APP_START_ADDR);
    }
    else
    {
        rt_kprintf("upgrade required\n");
    }
```
跳转失败，卡死在iap_load_app(APP_START_ADDR);

```c
    unsigned int LCRCInt;
    char LCRCInt1;
    Device_InfoDataStruct atcrc;
    INT_FlashRead(sizeof(lUpdataFlag), (uint8_t *)&lUpdataFlag, VERINFOSTARTADRESS);
    rt_kprintf("lUpdataFlag.Program_update_flag_bit = %d\n", lUpdataFlag.Program_update_flag_bit);
    rt_kprintf("lUpdataFlag.Program_CRC_check = %u\n", lUpdataFlag.Program_CRC_check);
    rt_kprintf("lUpdataFlag.Software_length = %d\n", lUpdataFlag.Software_length);
    if (lUpdataFlag.Program_update_flag_bit != UPDATAEN) // 不需要升级，则跳转主程序,更新标志位
    {
//        rt_kprintf("lUpdataFlag.Program_update_flag_bit = %d\n", lUpdataFlag.Program_update_flag_bit);
//        rt_kprintf("lUpdataFlag.Program_CRC_check = %u\n", lUpdataFlag.Program_CRC_check);
        iap_load_app(APP_START_ADDR);
    }
    else
    {
        rt_kprintf("upgrade required\n");
    }
```
把iap_load_app(APP_START_ADDR)上面的两行打印代码注掉后可以正常跳转到APP，并且能正常运行。
这是怎么回事？