單片機(jī)型號(hào)：STM32L053R8T6

   本例程測(cè)試STOP_RTC模式的真實(shí)功耗，主程序如下：

int main(void)

{

while(1)

{

    HAL_Delay(5000);

Target.HAL.Rtc.EnterStopRtcMode();

Target.HAL.SystemClock.SetMode(2);

  }

}

    系統(tǒng)進(jìn)入主循環(huán)后，先進(jìn)行5秒延時(shí)，然后進(jìn)入低功耗模式，低功耗模式設(shè)置的RTC時(shí)間為4秒，4秒過后退出低功耗模式，重新進(jìn)行時(shí)鐘設(shè)置。

    在進(jìn)入main函數(shù)之前，執(zhí)行了3個(gè)操作：時(shí)鐘設(shè)置、低功耗設(shè)置和RTC設(shè)置，如下面程序：

class CHAL

{

public:

CSystemClock SystemClock;

CSystemLowPower SystemLowPower;

CRtc Rtc;

};

    時(shí)鐘設(shè)置相關(guān)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; //HSIDT?y?μ

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);

}

}

    低功耗設(shè)置相關(guān)程序如下：

CLowPower::CLowPower(uint8_t mode)

{

if (mode == 1)

{

GPIO_InitTypeDef GPIO_InitStructure;

HAL_PWREx_EnableUltraLowPower(); //ê1?ü3?μí1|o?

    HAL_PWREx_EnableFastWakeUp(); //ê1?ü?ì?ù??D?

__HAL_RCC_WAKEUPSTOP_CLK_CONFIG(RCC_STOP_WAKEUPCLOCK_HSI); //??HSIê±?ó×÷?a??D?oóμ??÷ê±?ó

//???ùóDòy?????????a?￡?aê?è??￡ê?

    __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設(shè)置相關(guān)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???DDê?3?òy????ó3é?

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__);

}

}

    程序運(yùn)行后，5秒為正常功耗，4秒為低功耗，測(cè)得實(shí)際功耗2.4uA，手冊(cè)中指出的STOP_RTC模式為1uA，產(chǎn)生差錯(cuò)的原因在《STM32L0低功耗設(shè)計(jì)3: Stop模式下的真實(shí)功耗》中已經(jīng)介紹過，2.4uA已經(jīng)能夠滿足項(xiàng)目本身的設(shè)計(jì)了，還算不錯(cuò)。