M0内核单片机移植RT_Thread卡在 SysTick_IRQHandler

发布于 2021-08-24 10:41:08 浏览：1317 订阅该版

```c
int rtthread_startup(void)
{
    rt_hw_interrupt_disable();

/* board level initialization
     * NOTE: please initialize heap inside board initialization.
     */
    rt_hw_board_init();

/* show RT-Thread version */
    rt_show_version();

/* timer system initialization */
    rt_system_timer_init();

/* scheduler system initialization */
    rt_system_scheduler_init();

#ifdef RT_USING_SIGNALS
    /* signal system initialization */
    rt_system_signal_init();
#endif

/* create init_thread */
    rt_application_init();

/* timer thread initialization */
    rt_system_timer_thread_init();

/* idle thread initialization */
    rt_thread_idle_init();

/* start scheduler */
    rt_system_scheduler_start();

/* never reach here */
    return 0;
}
```
卡在了  rt_system_scheduler_start();  函数中
```c
 void UserSysTickInit(void)//初始化SysTick
{
    SYSTICK_InitStruType x;

x.SysTick_Value = SystemCoreClock / 1000;  //10000是SYSTIC的频率, 10000Hz->100us    1000->1ms
    x.SysTick_ClkSource = SysTick_ClkS_Cpu;
    x.SysTick_ITEnable = Enable;                //中断使能
    SysTick_Init(&x);
    //SysTick_Disable();                       	//使用时才开启
    SysTick_Enable();                          	//开启
    x.SysTick_Value = SystemCoreClock / 1000;
}

void rt_hw_board_init()
{
	  SystemInit();            	      //配置时钟
    SCU_SysClkSelect(SCU_CLK_HRC);
    PLLClock_Config(Enable, SCU_PLL_IN16M, SCU_PLL_48M, Enable);    //PLL使能，倍频到32M（可关闭打开分别观察指示灯闪烁差异）
    DeviceClockAllEnable();         //打开所有外设时钟
	  UserSysTickInit();

/* System Clock Update */
  //  SystemCoreClockUpdate();
    
    /* System Tick Configuration */
    _SysTick_Config(SystemCoreClock / RT_TICK_PER_SECOND);

/* Call components board initial (use INIT_BOARD_EXPORT()) */
#ifdef RT_USING_COMPONENTS_INIT
    rt_components_board_init();
#endif

#if defined(RT_USING_USER_MAIN) && defined(RT_USING_HEAP)
    rt_system_heap_init(rt_heap_begin_get(), rt_heap_end_get());
#endif
}

void SysTick_Handler(void)
{
	
    /* enter interrupt */
    rt_interrupt_enter();

rt_tick_increase();

/* leave interrupt */
    rt_interrupt_leave();
}
```

RT_Thread移植到东软HR8P506上卡在
```
EXPORT  SysTick_IRQHandler           [WEAK]
```
上。单片机是M0内核。