rtthread-studio使用GNUC的步骤有哪些呢

看keil和studio有一丝不同，所以标注的是KEIL，keil使用armc，rtthread-studio使用GNUC
一、首先进入COMPONENTS.c文件中的函数

int $Sub$$main(void)
{
    rtthread_startup();
    返回0；
}

二、rtthread_startup();详解


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();


#ifdef RT_USING_SMP
    rt_hw_spin_lock(&_cpus_lock);
#endif /*RT_USING_SMP*/


    /* start scheduler */
    rt_system_scheduler_start();


    /* never reach here */
    return 0;
}
#endif

详解1、 rt_hw_interrupt_disable();关闭中断

rt_hw_interrupt_disable    PROC
    EXPORT  rt_hw_interrupt_disable
    MRS     r0, PRIMASK
    CPSID   I
    BX      LR
    ENDP


;/*
; * void rt_hw_interrupt_enable(rt_base_t level);
; */
rt_hw_interrupt_enable    PROC
    EXPORT  rt_hw_interrupt_enable
    MSR     PRIMASK, r0
    BX      LR
    ENDP
    位置：context_rvds.S

2、位置drive_common.c

RT_WEAK void rt_hw_board_init()
{
#ifdef SCB_EnableICache
    /* Enable I-Cache---------------------------------------------------------*/
    SCB_EnableICache();
#endif


#ifdef SCB_EnableDCache
    /* Enable D-Cache---------------------------------------------------------*/
    SCB_EnableDCache();
#endif


    /* HAL_Init() function is called at the beginning of the program */
    HAL_Init();//hal库初始化


    /* enable interrupt */
    __set_PRIMASK(0);
    /* System clock initialization */
    SystemClock_Config();//时钟初始化
    /* disable interrupt */
    __set_PRIMASK(1);


    rt_hw_systick_init();


    /* Heap initialization */
#if defined(RT_USING_HEAP)
    rt_system_heap_init((void *)HEAP_BEGIN, (void *)HEAP_END);
#endif


    /* Pin driver initialization is open by default */
#ifdef RT_USING_PIN
    rt_hw_pin_init();//后期再聊的知识点
#endif


    /* USART driver initialization is open by default */
#ifdef RT_USING_SERIAL
    rt_hw_usart_init();//串口初始化
#endif


    /* Set the shell console output device */
#ifdef RT_USING_CONSOLE
    rt_console_set_device(RT_CONSOLE_DEVICE_NAME);//控制台初始化
#endif


    /* Board underlying hardware initialization */
#ifdef RT_USING_COMPONENTS_INIT
    rt_components_board_init();//划重点，第二章说
#endif
}

3、rt_show_version(); 程序开始启动的时候显示串口的版本等
4、system_timer_init();
5、rt_system_scheduler_init（）；内核的东西不说
6、rt_application_init

void rt_application_init(void)
{
    rt_thread_t tid;


#ifdef RT_USING_HEAP
    tid = rt_thread_create("main", main_thread_entry, RT_NULL,
                           RT_MAIN_THREAD_STACK_SIZE, RT_MAIN_THREAD_PRIORITY, 20);
    RT_ASSERT(tid != RT_NULL);
#else
    rt_err_t result;


    tid = &main_thread;
  /*  #define RT_MAIN_THREAD_STACK_SIZE 2048
      #define RT_MAIN_THREAD_PRIORITY 10*/
    result = rt_thread_init(tid, "main", main_thread_entry, RT_NULL,
                            main_stack, sizeof(main_stack), RT_MAIN_THREAD_PRIORITY, 20);
    RT_ASSERT(result == RT_EOK);


    /* if not define RT_USING_HEAP, using to eliminate the warning */
    (void)result;
#endif


    rt_thread_startup(tid);
}
void main_thread_entry(void *parameter)
{
    extern int main(void);
    extern int $Super$$main(void);
   
#ifdef RT_USING_COMPONENTS_INIT
    /* RT-Thread components initialization */
    rt_components_init();
#endif   
#ifdef RT_USING_SMP
    rt_hw_secondary_cpu_up();
#endif
    /* invoke system main function */
#if defined(__CC_ARM) || defined(__CLANG_ARM)
    $Super$$main(); /* for ARMCC. */
#elif defined(__ICCARM__) || defined(__GNUC__)
    main();
#endif
}


画重点： rt_components_init();这人函数是rtthread最好用的函数。