求助 在RTT操作系统的空闲钩子函数里实现低功耗

gzc1017

现在我的空闲钩子函数设置是
extern void EnterSTOPMode_RTCAlarm(void);
void rt_thread_idle_sethook(void EnterSTOPMode_RTCAlarm(void))
{
    rt_thread_idle_hook=EnterSTOPMode_RTCAlarm;
}
下面是具体实现
#include "stm32f10x.h"
#include "stm32_eval.h"

extern void RTC_Configuration(void);
ErrorStatus HSEStartUpStatus;
/**
  * @brief  Configures system clock after wake-up from STOP: enable HSE, PLL
  *   and select PLL as system clock source.
  * @param  None
  * @retval None
  */
void SYSCLKConfig_STOP(void)
{
  /* Enable HSE */
  RCC_HSEConfig(RCC_HSE_ON);

  /* Wait till HSE is ready */
  HSEStartUpStatus = RCC_WaitForHSEStartUp();

  if(HSEStartUpStatus == SUCCESS)
  {

#ifdef STM32F10X_CL
    /* Enable PLL2 */
    RCC_PLL2Cmd(ENABLE);

    /* Wait till PLL2 is ready */
    while(RCC_GetFlagStatus(RCC_FLAG_PLL2RDY) == RESET)
    {
    }
#endif

    /* Enable PLL */
    RCC_PLLCmd(ENABLE);

    /* Wait till PLL is ready */
    while(RCC_GetFlagStatus(RCC_FLAG_PLLRDY) == RESET)
    {
    }

    /* Select PLL as system clock source */
    RCC_SYSCLKConfig(RCC_SYSCLKSource_PLLCLK);

    /* Wait till PLL is used as system clock source */
    while(RCC_GetSYSCLKSource() != 0x08)
    {
    }
  }
}

/**
  * @brief  Configures EXTI Lines.
  * @param  None
  * @retval None
  */
void EXTI_Configuration(void)
{
  EXTI_InitTypeDef EXTI_InitStructure;

  /* Configure EXTI Line17(RTC Alarm) to generate an interrupt on rising edge */
  EXTI_ClearITPendingBit(EXTI_Line17);
  EXTI_InitStructure.EXTI_Line = EXTI_Line17;
  EXTI_InitStructure.EXTI_Mode = EXTI_Mode_Interrupt;
  EXTI_InitStructure.EXTI_Trigger = EXTI_Trigger_Rising;
  EXTI_InitStructure.EXTI_LineCmd = ENABLE;
  EXTI_Init(&EXTI_InitStructure);
}


/**
  * @brief  Configures NVIC and Vector Table base location.
  * @param  None
  * @retval None
  */
static void NVIC_Configuration(void)
{
  NVIC_InitTypeDef NVIC_InitStructure;

  /* 2 bits for Preemption Priority and 2 bits for Sub Priority */
  NVIC_PriorityGroupConfig(NVIC_PriorityGroup_2);

  NVIC_InitStructure.NVIC_IRQChannel = RTCAlarm_IRQn;
  NVIC_InitStructure.NVIC_IRQChannelPreemptionPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelSubPriority = 0;
  NVIC_InitStructure.NVIC_IRQChannelCmd = ENABLE;
  NVIC_Init(&NVIC_InitStructure);
}



void EnterSTOPMode_RTCAlarm(void)
{

  /* Initialize LEDs and Key Button mounted on STM3210X-EVAL board */      
  STM_EVAL_LEDInit(LED1);
  STM_EVAL_LEDInit(LED2);
  STM_EVAL_LEDInit(LED3);
  STM_EVAL_PBInit(Button_KEY, Mode_EXTI);

  /* Configure EXTI Line to generate an interrupt on falling edge */
  EXTI_Configuration();

  /* Configure RTC clock source and prescaler */
  RTC_Configuration();

  /* NVIC configuration */
  NVIC_Configuration();

  /* Turn on LED1 */
  STM_EVAL_LEDOn(LED1);
  
  while (1)
  {

    /* Wait till RTC Second event occurs */
    RTC_ClearFlag(RTC_FLAG_SEC);
    while(RTC_GetFlagStatus(RTC_FLAG_SEC) == RESET);

    /* Alarm in 1 second */
    RTC_SetAlarm(RTC_GetCounter()+ 1);
    /* Wait until last write operation on RTC registers has finished */
    RTC_WaitForLastTask();

    /* Turn off LED1 */
    STM_EVAL_LEDOff(LED1);
    //rt_kprintf("Enter stop mode...\n");

    /* Request to enter STOP mode with regulator in low power mode*/
    PWR_EnterSTOPMode(PWR_Regulator_LowPower, PWR_STOPEntry_WFI);

    /* At this stage the system has resumed from STOP mode -------------------*/
    /* Turn on LED1 */
    STM_EVAL_LEDOn(LED1);
    //rt_kprintf("Wake from stop mode\n");
    /* Configures system clock after wake-up from STOP: enable HSE, PLL and select
       PLL as system clock source (HSE and PLL are disabled in STOP mode) */
    SYSCLKConfig_STOP();
       

  }
}
其中RTC的配置是
void RTC_Configuration(void)
{
   /* Enable PWR and BKP clocks */
   RCC_APB1PeriphClockCmd(RCC_APB1Periph_PWR | RCC_APB1Periph_BKP, ENABLE);
  
   /* Allow access to BKP Domain */
   PWR_BackupAccessCmd(ENABLE);
  
   /* Reset Backup Domain */
   BKP_DeInit();
  
   /* Enable LSE */
   RCC_LSEConfig(RCC_LSE_ON);
   /* Wait till LSE is ready */
   while (RCC_GetFlagStatus(RCC_FLAG_LSERDY) == RESET)
   {
   }
  
   /* Select LSE as RTC Clock Source */
   RCC_RTCCLKConfig(RCC_RTCCLKSource_LSE);
  
   /* Enable RTC Clock */
   RCC_RTCCLKCmd(ENABLE);
  
   /* Wait for RTC registers synchronization */
   RTC_WaitForSynchro();
  
   /* Wait until last write operation on RTC registers has finished */
   RTC_WaitForLastTask();
  
   /* Set RTC prescaler: set RTC period to 1sec */
   RTC_SetPrescaler(32767); /* RTC period = RTCCLK/RTC_PR = (32.768 KHz)/(32767+1) */
  
   /* Wait until last write operation on RTC registers has finished */
   RTC_WaitForLastTask();

}
但是我把程序下载进去后，低功耗程序根本没有执行，请大家分析哈原因，谢谢！困惑中

gzc1017

自己顶一下，现在只知道在RTT的IDLE钩子中不能有while (1)因为空闲线程里有个while（1），但其他的问题就不知道了，请有经验的大侠指导哈，在空闲钩子函数里应该怎么实现低功耗呢？谢谢！

ffxz

extern void EnterSTOPMode_RTCAlarm(void);
void rt_thread_idle_sethook(void EnterSTOPMode_RTCAlarm(void))
{
    rt_thread_idle_hook=EnterSTOPMode_RTCAlarm;
}

这个是？rt_thraed_idle_sethook不是系统提供的调用吗，不需要修改函数本身的实现

应该在初始化中调用：
rt_thread_idle_sethook(EnterSTOPMode_RTCAlarm)

这样钩子函数才能设置上。

litteworm

idle 裏面跑低功耗 是個好idea
畢竟嵌入式板子 功耗是永遠的話題
還有 我覺得 可以通過idle 計算cpu使用率
然後根據cpu使用率 自動調整stm32的倍頻
這樣 也可以降低功耗