rt_kprintf之前要加rt_thread_mdelay功能才正常

HAL_ADC_Start_DMA(&hadc1, (uint32_t*)&ADC_Value_Buff, SIZE);
while(1)
    {
        semADC=rt_sem_take(adc_over_sem, RT_WAITING_FOREVER);
        if(semADC ==RT_EOK)
        {
            rt_kprintf("\n\nADC sampling over!\n");
            rt_kprintf("IN1:%d\n",ADC_Value_Buff[0]);
        }
    }

HAL_ADC_Start_DMA(&hadc1, (uint32_t*)&ADC_Value_Buff, SIZE);
while(1)
    {
        semADC=rt_sem_take(adc_over_sem, RT_WAITING_FOREVER);
        if(semADC ==RT_EOK)
        {
            rt_thread_mdelay(2);
            rt_kprintf("\n\nADC sampling over!\n");
            rt_kprintf("IN1:%d\n",ADC_Value_Buff[0]);
        }
    }