STM32L151系列低功耗模式編程

ID:432182 · 發表于 2019-9-23 09:10

STM32L151系列低功耗模式：Stop模式、Stop+RTC模式、Sleep模式
STM32L系列有五種低功耗模式，分別是standby,stop,sleep,low power sleep,low power run.
其中standby模式下功耗最低，實測電流為1uA，此種模式下數據不保存。
stop模式實測功耗為1.3uA，此種模式下數據保存。
sleep模式下功耗為1mA左右，主要受頻率，溫度等影響，功耗發生變化。

此代碼使用RTC喚醒，使用其他方式喚醒方式相對簡單，可以參考st官方例程。

單片機源程序如下:

/*
*********************************************************
** Filename: stop_mode.c
** Abstract: 使用STM32L151C8T6MCU，使用RTC喚醒STOP和STANDBY模式下的低功耗,低功耗時長可以人為的進行設置
** 設置低功耗時長時請參考頭文件中關于時長的宏定義
** 使用注意事項：使用CubeMX生成函數時，在main()函數后會自動生成SystemClock_Config()函數，此程序中調用了該函數。
** 如果該函數在其他文件中，請將該.h文件加入，以免發生錯誤；
** Date : 2018-01-04
** Author:王翔武
*********************************************************
*/
/* Includes ------------------------------------------------------------------*/
#include "pwr_mode_rtc.h"
#include "main.h"
RTC_HandleTypeDef RTCHandle; //RTC結構體變量
//進入STOP模式低功耗，使用RTC功能喚醒，其中stoptime單位為S，如設置1，低功耗1秒后喚醒
void enter_stop_rtc(float stoptime)
{
uint32_t i; //局部變量，用于計算低功耗時長
system_power_config();
/* Disable Wakeup Counter */
HAL_RTCEx_DeactivateWakeUpTimer(&RTCHandle);
/*To configure the wake up timer to 4s the WakeUpCounter is set to 0x242B:
RTC_WAKEUPCLOCK_RTCCLK_DIV = RTCCLK_Div16 = 16
Wakeup Time Base = 16 /(~37KHz) = ~0,432 ms
Wakeup Time = ~5s = 0,432ms * WakeUpCounter
==> WakeUpCounter = ~5s/0,432ms = 11562 */
i = stoptime*2396;
HAL_RTCEx_SetWakeUpTimer_IT(&RTCHandle, i, RTC_WAKEUPCLOCK_RTCCLK_DIV16);
/* Enter Stop Mode */
HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);
SystemClock_Config();
}
//進入STANDBY模式低功耗，使用RTC功能喚醒，其中standbytime單位為S，如設置1，低功耗1秒后喚醒
void enter_standby_rtc(float standbytime)
{
uint32_t i; //局部變量，用于計算低功耗時長
system_power_config();
if(__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET)
{
/* Clear Standby flag */
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);
}
/* Disable Wakeup Counter */
HAL_RTCEx_DeactivateWakeUpTimer(&RTCHandle);
/*To configure the wake up timer to 4s the WakeUpCounter is set to 0x242B:
RTC_WAKEUPCLOCK_RTCCLK_DIV = RTCCLK_Div16 = 16
Wakeup Time Base = 16 /(~37KHz) = ~0,432 ms
Wakeup Time = ~5s = 0,432ms * WakeUpCounter
==> WakeUpCounter = ~5s/0,432ms = 11562 */
i = standbytime*2396;
HAL_RTCEx_SetWakeUpTimer_IT(&RTCHandle, i, RTC_WAKEUPCLOCK_RTCCLK_DIV16);
/* Clear all related wakeup flags */
__HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);
/* Enter the Standby mode */
HAL_PWR_EnterSTANDBYMode();
}
//進入SLEEP模式低功耗，使用RTC功能喚醒，其中sleeptime單位為S，如設置1，低功耗1秒后喚醒
void enter_sleep_rtc(float sleeptime)
{
uint32_t i; //局部變量，用于計算低功耗時長
system_power_config();
/* Disable Wakeup Counter */
HAL_RTCEx_DeactivateWakeUpTimer(&RTCHandle);
/*To configure the wake up timer to 4s the WakeUpCounter is set to 0x242B:
RTC_WAKEUPCLOCK_RTCCLK_DIV = RTCCLK_Div16 = 16
Wakeup Time Base = 16 /(~37KHz) = ~0,432 ms
Wakeup Time = ~5s = 0,432ms * WakeUpCounter
==> WakeUpCounter = ~5s/0,432ms = 11562 */
i = sleeptime*2396;
HAL_RTCEx_SetWakeUpTimer_IT(&RTCHandle, i, RTC_WAKEUPCLOCK_RTCCLK_DIV16);
/*Suspend Tick increment to prevent wakeup by Systick interrupt.
Otherwise the Systick interrupt will wake up the device within 1ms (HAL time base)*/
HAL_SuspendTick();
/* Enter Sleep Mode , wake up is done once Key push button is pressed */
HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI);
/* Resume Tick interrupt if disabled prior to sleep mode entry*/
HAL_ResumeTick();
}
//低功耗關閉項
void system_power_config(void)
{
GPIO_InitTypeDef GPIO_InitStructure = {0};
/* Enable Power Control clock */
__HAL_RCC_PWR_CLK_ENABLE();
/* Enable Ultra low power mode */
HAL_PWREx_EnableUltraLowPower();
/* Enable the fast wake up from Ultra low power mode */
HAL_PWREx_EnableFastWakeUp();
/* Enable GPIOs clock */
__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();
__HAL_RCC_GPIOE_CLK_ENABLE();
/* Configure all GPIO port pins in Analog Input mode (floating input trigger OFF) */
/* Note: Debug using ST-Link is not possible during the execution of this */
/* example because communication between ST-link and the device */
/* under test is done through UART. All GPIO pins are disabled (set */
/* to analog input mode) including UART I/O pins. */
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_GPIO_Init(GPIOE, &GPIO_InitStructure);
/* Disable GPIOs clock */
__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();
__HAL_RCC_GPIOE_CLK_DISABLE();
/* Configure RTC */
RTCHandle.Instance = RTC;
/* Configure RTC prescaler and RTC data registers as follow:
- Hour Format = Format 24
- Asynch Prediv = Value according to source clock
- Synch Prediv = Value according to source clock
- OutPut = Output Disable
- OutPutPolarity = High Polarity
- OutPutType = Open Drain */
RTCHandle.Init.HourFormat = RTC_HOURFORMAT_24;
RTCHandle.Init.AsynchPrediv = 0x7C;
RTCHandle.Init.SynchPrediv = 0x0127;
RTCHandle.Init.OutPut = RTC_OUTPUT_DISABLE;
RTCHandle.Init.OutPutPolarity = RTC_OUTPUT_POLARITY_HIGH;
RTCHandle.Init.OutPutType = RTC_OUTPUT_TYPE_OPENDRAIN;
if(HAL_RTC_Init(&RTCHandle) != HAL_OK)
{
/* Initialization Error */
Error_Handler();
}
}
/************************ Johnking *****END OF FILE****/