NUCLEO-L053R8:低功耗STOP模式,RTC唤醒(例程分享)5 g) y6 q: U1 j' a- } 基于ST官方NUCLEO-L053R8开发板 代码下载:见附件 Stop mode with RTC:1uA VDD=3.0V /** * @brief Main program * @param None * @retval None% n) D' T8 e; Z+ o. Z */3 v1 R8 U4 S! C9 H int main(void): o# W5 ^0 X' j {. N j$ Y5 l3 p( q. g/ U0 I /* STM32L0xx HAL library initialization: - Configure the Flash prefetch, Flash preread and Buffer caches - Systick timer is configured by default as source of time base, but user 8 p7 G1 T% J' z9 ~1 o can eventually implement his proper time base source (a general purpose , g8 L6 p# m) T7 o% K# p. \; a timer for example or other time source), keeping in mind that Time base # h, o4 {$ u$ { duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and 1 D5 f+ z% j' B& B3 m: z. O# y handled in milliseconds basis.1 o; B3 D, Z4 s8 U# o5 Z' _; ^+ m - Low Level Initialization3 I$ F" I+ W' d# Z6 k. o */8 A: O" K; ^/ k8 f; `) ] HAL_Init();1 S$ K' r3 H2 n: Z5 [ / _7 Y+ F- Y% q; X+ s! D$ J( X /* Configure LED2 to handle error handler */ BSP_LED_Init(LED2);* g5 {& Y s: _ $ [: `3 y& }9 S8 y. M% j6 D2 c1 g /* Configure the system clock @ 32 Mhz */ SystemClock_Config();& q5 f$ @7 }; c# W+ V$ u /* Configure the system Power */ SystemPower_Config(); while (1)* w1 K0 ?: N; c { /* Insert 3 seconds delay */ BSP_LED_Init(LED2); //LED初始化 2 |" v6 o1 q* P( W$ t HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_SET); //点亮LED,延时3S,再灭LED9 h0 `( W" \- {5 ]/ N n x+ m HAL_Delay(3000);' |9 B C) s; B' q. S( [ HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_RESET); HAL_Delay(3000);4 \- n) W2 s1 V! t4 `$ {) r/ O$ H SystemPowerNORTC_Config(); //关闭所有IO和时钟,不关闭RTC' I. J; `4 r4 r$ |! x 5 v7 C/ y3 G; A. I% l/ I /* Disable Wakeup Counter */ HAL_RTCEx_DeactivateWakeUpTimer(&RTCHandle); . F' k* `* N. R: x+ ~. d+ y' H( |" @ /*## Setting the Wake up time ############################################*/ /* RTC Wakeup Interrupt Generation:5 l. P* _" F9 @) N; Y" Y Wakeup Time Base = (RTC_WAKEUPCLOCK_RTCCLK_DIV /(LSE or LSI)) Wakeup Time = Wakeup Time Base * WakeUpCounter & r: y# G# _0 u" a% J = (RTC_WAKEUPCLOCK_RTCCLK_DIV /(LSE or LSI)) * WakeUpCounter ==> WakeUpCounter = Wakeup Time / Wakeup Time Base 7 K0 i5 D! o. l* n- r. {3 N7 f To configure the wake up timer to 4s the WakeUpCounter is set to 0x1FFF:/ F. w, s7 U4 e5 U RTC_WAKEUPCLOCK_RTCCLK_DIV = RTCCLK_Div16 = 16 / r8 f6 H% c0 e9 G) F6 a+ O, \ Wakeup Time Base = 16 /(~39.000KHz) = ~0,410 ms Wakeup Time = ~4s = 0,410ms * WakeUpCounter ==> WakeUpCounter = ~4s/0,410ms = 9750 = 0x2616 */ v& I9 ?% C4 ?2 \ HAL_RTCEx_SetWakeUpTimer_IT(&RTCHandle, 0x2616, RTC_WAKEUPCLOCK_RTCCLK_DIV16); /* Enter Stop Mode *// @5 K s2 @: C. y8 D HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI); ' [/ F- j4 Q2 R9 m# ^ /* Configures system clock after wake-up from STOP: enable HSI, PLL and select PLL as system clock source (HSI and PLL are disabled automatically in STOP mode) */( h& n5 l& O$ u% G9 ]3 _7 a SystemClockConfig_STOP(); }7 [1 c% C) q( c2 A! e& n- t% I5 S } 7 D- [: l" F+ [0 M$ W$ d7 m |
PWR_STOP_RTC.rar
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