NUCLEO-L053R8：低功耗待机模式standby/PA0唤醒（例程分享）

待机模式唤醒后等同复位

基于ST官方NUCLEO-L053R8开发板

用PA0引脚唤醒（用杜邦线接高电平唤醒）

代码下载：见附件

standby mode without RTC：0.29uA VDD=3.0V

/**
* @brief  Main program
* @param  None
* a% @/ \. s* }$ N8 y. _* @retval None
4 I& |2 o1 D6 f) F*/
int main(void)
2 M: U# [$ r/ L2 Q& m) W" v: u( l{  
  /* 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
) h" G# Y; _; S- ~4 }: W             can eventually implement his proper time base source (a general purpose
: q: @( s+ \& g- o, K; w" u$ y             timer for example or other time source), keeping in mind that Time base
             duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and
1 n5 G: J, a+ i0 N             handled in milliseconds basis.
6 ?* E9 p$ M0 r       - Low Level Initialization
0 w- M- Y7 v" P9 K& K) X; j  ^6 q     */
  HAL_Init();
0 t' B  c  o# c4 ?
2 c4 P6 M' r2 P1 J  /* Configure LED2 */
+ V8 P: v% y9 g3 u" x$ D* u  BSP_LED_Init(LED2);
- C8 L1 l! [8 @) j2 o
* B0 n7 h0 ^, z* i  /* Configure the system clock to 2 MHz */
8 P: |( v2 u  v# n+ N$ C  SystemClock_Config();


9 k' u" S9 M+ @" E. P  /* Check and handle if the system was resumed from Standby mode */
  if(__HAL_PWR_GET_FLAG(PWR_FLAG_SB) != RESET)
( Y  p' ^) _* Z$ t3 C& S( `  {
    /* Clear Standby flag */
1 q$ [' S1 U- B5 w    __HAL_PWR_CLEAR_FLAG(PWR_FLAG_SB);
: A8 K2 h+ Q7 p- a
//如果是唤醒状态，则LED亮3秒
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_SET);        //点亮LED,延时3S，再灭LED
HAL_Delay(3000);
HAL_GPIO_WritePin(GPIOA, GPIO_PIN_5, GPIO_PIN_RESET);
: s5 A- }; o$ _/ M  }
else;
  
2 @9 C/ c, K; J* l6 H/ B/* Configure the system Power */
  SystemPower_Config();
  
  /* Insert 1 seconds delay */
  HAL_Delay(1000);
; k' t1 ~( F5 B' S3 R
    /*The Following Wakeup sequence is highly recommended prior to each Standby mode entry
2 E0 ^' S* T% Q     mainly  when using more than one wakeup source this is to not miss any wakeup event.
       - Disable all used wakeup sources,
       - Clear all related wakeup flags,
) }9 k# _5 i7 r# C6 Q$ V6 q- s9 J6 [       - Re-enable all used wakeup sources,
       - Enter the Standby mode.
6 g1 ^( R; ?- q" v$ n4 F: f" W6 L& Y     */
  /*Disable all used wakeup sources: Pin1(PA.0)*/
  HAL_PWR_DisableWakeUpPin(PWR_WAKEUP_PIN1);
' Q5 @7 a2 C2 z" q8 I7 s  
, r; e3 [% H4 S$ @  /*Clear all related wakeup flags*/
  __HAL_PWR_CLEAR_FLAG(PWR_FLAG_WU);
" {, B9 I+ b, H/ y  
  /*Re-enable all used wakeup sources: Pin1(PA.0)*/
  HAL_PWR_EnableWakeUpPin(PWR_WAKEUP_PIN1);
$ c3 ^( u" k+ a$ L( H( d  
$ ^# s+ f, }+ J9 \( ?  /*Enter the Standby mode*/
  HAL_PWR_EnterSTANDBYMode();
  
  while (1)
  {
  }
* E* ]# y2 N' R6 I6 n}
+ K+ B& Y- y) |

$ t# f3 P+ _* q0 `1 }

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7 C* F. N5 L0 I6 Z/ Q谢楼上支持

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参考参考

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