STM32L0低功耗设计5: STOP_RTC模式的真实功耗

本例程测试STOP_RTC模式的真实功耗，主程序如下：

int main(void)
{
	while(1)
	{
    HAL_Delay(5000);
		Target.HAL.Rtc.EnterStopRtcMode();
		Target.HAL.SystemClock.SetMode(2);
 	}
}

系统进入主循环后，先进行5秒延时，然后进入低功耗模式，低功耗模式设置的RTC时间为4秒，4秒过后退出低功耗模式，重新进行时钟设置。

在进入main函数之前，执行了3个操作：时钟设置、低功耗设置和RTC设置，如下面程序：

class CHAL
{
public:
	CSystemClock SystemClock;
	CSystemLowPower SystemLowPower;
	CRtc Rtc;
};

时钟设置相关程序如下：

void CClock::SetMode(uint8_t mode)
{
	RCC_OscInitTypeDef RCC_OscInitStruct;
	RCC_ClkInitTypeDef RCC_ClkInitStruct;
	RCC_PeriphCLKInitTypeDef PeriphClkInit;
	
	__HAL_RCC_PWR_CLK_ENABLE();
	
	if (mode  == 0)
	{
		//Configure the main internal regulator output voltage 
		__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

		//Initializes the CPU, AHB and APB busses clocks 
		RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
		RCC_OscInitStruct.HSEState = RCC_HSE_ON;
		RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
		RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
		RCC_OscInitStruct.PLL.PLLMUL = RCC_PLLMUL_8;
		RCC_OscInitStruct.PLL.PLLDIV = RCC_PLLDIV_3;
		if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
		{
			Target.ErrorHandler(__FILE__, __LINE__);
		}

		//Initializes the CPU, AHB and APB busses clocks 
		RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
																|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
		RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
		RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
		RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
		RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

		if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
		{
			Target.ErrorHandler(__FILE__, __LINE__);
		}

		PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1|RCC_PERIPHCLK_USART2;
		PeriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK2;
		PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;
		if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
		{
			Target.ErrorHandler(__FILE__, __LINE__);
		}

		//Configure the Systick interrupt time 
		HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);

		//Configure the Systick 
		HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

		//SysTick_IRQn interrupt configuration
		HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
	}
	else if (mode  == 1)
	{
		//Configure the main internal regulator output voltage 
		__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

		//Initializes the CPU, AHB and APB busses clocks 
		RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_HSE;
		RCC_OscInitStruct.HSEState = RCC_HSE_ON;
		RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
		RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
		RCC_OscInitStruct.PLL.PLLMUL = RCC_PLLMUL_8;
		RCC_OscInitStruct.PLL.PLLDIV = RCC_PLLDIV_3;
		if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
		{
			Target.ErrorHandler(__FILE__, __LINE__);
		}

		//Initializes the CPU, AHB and APB busses clocks 
		RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
																|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
		RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
		RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
		RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
		RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;

		if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
		{
			Target.ErrorHandler(__FILE__, __LINE__);
		}

		PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1|RCC_PERIPHCLK_USART2
																|RCC_PERIPHCLK_USB;
		PeriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK2;
		PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;
		PeriphClkInit.UsbClockSelection = RCC_USBCLKSOURCE_PLL;
		if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
		{
			Target.ErrorHandler(__FILE__, __LINE__);
		}

		//Configure the Systick interrupt time 
		HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);

		//Configure the Systick 
		HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

		//SysTick_IRQn interrupt configuration
		HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
	}
	else if (mode == 2)
	{
		//Configure the main internal regulator output voltage 
		__HAL_PWR_VOLTAGESCALING_CONFIG(PWR_REGULATOR_VOLTAGE_SCALE1);

		//Initializes the CPU, AHB and APB busses clocks 
		RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSI | RCC_OSCILLATORTYPE_HSE | RCC_OSCILLATORTYPE_HSI;
		RCC_OscInitStruct.HSEState = RCC_HSE_ON;
		RCC_OscInitStruct.LSIState = RCC_LSI_ON;
		RCC_OscInitStruct.HSIState = RCC_HSI_ON;
		RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;
		RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_HSE;
		RCC_OscInitStruct.PLL.PLLMUL = RCC_PLLMUL_8;
		RCC_OscInitStruct.PLL.PLLDIV = RCC_PLLDIV_3;
		RCC_OscInitStruct.HSICalibrationValue = 0x10;					//HSIÐÞÕýÖµ
		if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
		{
			Target.ErrorHandler(__FILE__, __LINE__);
		}

		//Initializes the CPU, AHB and APB busses clocks 
		RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK|RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
		RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;
		RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
		RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
		RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
		if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_1) != HAL_OK)
		{
			Target.ErrorHandler(__FILE__, __LINE__);
		}

		PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART1|RCC_PERIPHCLK_USART2|RCC_PERIPHCLK_RTC;
		PeriphClkInit.Usart1ClockSelection = RCC_USART1CLKSOURCE_PCLK2;
		PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;
		PeriphClkInit.RTCClockSelection = RCC_RTCCLKSOURCE_LSI;
		if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
		{
			Target.ErrorHandler(__FILE__, __LINE__);
		}

		//Configure the Systick interrupt time 
		HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);

		//Configure the Systick 
		HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);

		//SysTick_IRQn interrupt configuration
		HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);		
	}
}

低功耗设置相关程序如下：

CLowPower::CLowPower(uint8_t mode)
{
	if (mode == 1)
	{
		GPIO_InitTypeDef GPIO_InitStructure;
		HAL_PWREx_EnableUltraLowPower();															//Ê¹ÄÜ³¬µÍ¹¦ºÄ
    HAL_PWREx_EnableFastWakeUp();																	//Ê¹ÄÜ¿ìËÙ»½ÐÑ
		__HAL_RCC_WAKEUPSTOP_CLK_CONFIG(RCC_STOP_WAKEUPCLOCK_HSI);		//½«HSIÊ±ÖÓ×÷Îª»½ÐÑºóµÄÖ÷Ê±ÖÓ
		//½«ËùÓÐÒý½Å¶¼ÅäÖÃÎªÄ£ÄâÊäÈëÄ£Ê½
    __HAL_RCC_GPIOA_CLK_ENABLE();
		__HAL_RCC_GPIOB_CLK_ENABLE();
		__HAL_RCC_GPIOC_CLK_ENABLE();
		__HAL_RCC_GPIOD_CLK_ENABLE();
		__HAL_RCC_GPIOH_CLK_ENABLE();  
		GPIO_InitStructure.Pin = GPIO_PIN_All;
		GPIO_InitStructure.Mode = GPIO_MODE_ANALOG;
		GPIO_InitStructure.Pull = GPIO_NOPULL;
		HAL_GPIO_Init(GPIOA, &GPIO_InitStructure); 
		HAL_GPIO_Init(GPIOB, &GPIO_InitStructure);
		HAL_GPIO_Init(GPIOC, &GPIO_InitStructure);
		HAL_GPIO_Init(GPIOD, &GPIO_InitStructure);
		HAL_GPIO_Init(GPIOH, &GPIO_InitStructure);
		__HAL_RCC_GPIOA_CLK_DISABLE();
		__HAL_RCC_GPIOB_CLK_DISABLE();
		__HAL_RCC_GPIOC_CLK_DISABLE();
		__HAL_RCC_GPIOD_CLK_DISABLE();
		__HAL_RCC_GPIOH_CLK_DISABLE();
	}
}

RTC设置相关程序如下：

CRtc::CRtc(void)
{
  this->hRTC.Instance = RTC;
	pRTC = &this->hRTC;
	this->hRTC.Init.HourFormat = RTC_HOURFORMAT_24;
	this->hRTC.Init.AsynchPrediv = 124;
	this->hRTC.Init.SynchPrediv = 295;
	this->hRTC.Init.OutPut = RTC_OUTPUT_DISABLE;
	this->hRTC.Init.OutPutRemap = RTC_OUTPUT_REMAP_NONE;	//²»½øÐÐÊä³öÒý½ÅÖØÓ³Éä
	this->hRTC.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
	this->hRTC.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
	if (HAL_RTC_Init(&this->hRTC) != HAL_OK)
	{
		Target.ErrorHandler(__FILE__, __LINE__);
	}			
}

程序运行后，5秒为正常功耗，4秒为低功耗，测得实际功耗2.4uA，手册中指出的STOP_RTC模式为1uA，产生差错的原因在《STM32L0低功耗设计3: Stop模式下的真实功耗》中已经介绍过，2.4uA已经能够满足项目本身的设计了，还算不错。

原创性文章，转载请注明出处

CSDN：http://blog.csdn.net/qingwufeiyang12346

STM32L0低功耗设计5: STOP_RTC模式的真实功耗

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