求助 在RTT操作系统的空闲钩子函数里实现低功耗
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;
/**
* @briefConfigures system clock after wake-up from STOP: enable HSE, PLL
* and select PLL as system clock source.
* @paramNone
* @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)
{
}
}
}
/**
* @briefConfigures EXTI Lines.
* @paramNone
* @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);
}
/**
* @briefConfigures NVIC and Vector Table base location.
* @paramNone
* @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 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！ 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。 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
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