boot跳裸机正常跳rtt失败解决方法

发布于 2022-11-15 11:43:59 浏览：999 订阅该版

2 条评论

crystal266 2022-11-15

嵌入式

参考 [qboot 源码](https://gitee.com/qiyongzhong0/rt-thread-qboot "qboot 源码") 跳转代码的实现试一下

STM32 qboot 中 bootload 跳转到 app 代码的实现如下：
```c
void qbt_jump_to_app(void)
{
    typedef void (*app_func_t)(void);
    rt_uint32_t app_addr = QBOOT_APP_ADDR;  // APP 的起始地址，根据自己的工程定义，例如 0x08080000
    rt_uint32_t stk_addr = *((__IO rt_uint32_t *)app_addr);
    app_func_t app_func = (app_func_t)(*((__IO rt_uint32_t *)(app_addr + 4)));

if ((((rt_uint32_t)app_func & 0xff000000) != 0x08000000) || (((stk_addr & 0x2ff00000) != 0x20000000) && ((stk_addr & 0x2ff00000) != 0x24000000)))
    {
        LOG_E("No legitimate application.");
        return;
    }

rt_kprintf("Jump to application running ... \n");
    rt_thread_mdelay(200);
    
    __disable_irq();
    HAL_DeInit();

for(int i=0; i<128; i++)
    {
        HAL_NVIC_DisableIRQ(i);
        HAL_NVIC_ClearPendingIRQ(i);
    }
    
    SysTick->CTRL = 0;
    SysTick->LOAD = 0;
    SysTick->VAL = 0;
    
    HAL_RCC_DeInit();
    
    __set_CONTROL(0);
    __set_MSP(stk_addr);
    
    app_func();//Jump to application running
    
    LOG_E("Qboot jump to application fail.");
}
```