实现方法:
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) }2 V/ ?! _' C6 v1、定时休眠唤醒code8 f, d4 V$ O' M$ @
- HAL_Delay(2000);//进行采样的时间
0 S0 j1 `! \/ z* P4 L7 a6 j - HAL_RTCEx_DeactivateWakeUpTimer(&RTCHandle);; r" D7 L) B& F( E# `+ d
- HAL_RTCEx_SetWakeUpTimer_IT(&RTCHandle, 2, RTC_WAKEUPCLOCK_RTCCLK_DIV16);( t) G6 j! P8 ], p+ w* _
- HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);//调用库函数进入STOP模式. v6 h& D" @- _- o" Q; E/ }4 W8 |
- SystemClockConfig_STOP();//停机模式后唤醒,恢复时钟源& ]/ h1 o6 x3 M7 B. K; D+ a
- count1++;* M$ S* D8 }1 V6 `( F
- while(count1==1)//循环的次数
9 D% a* l" Q3 z# _ - {
9 e1 R; V: |$ t, \# j* B+ C - Rx_Init();
: h" [' G; @( A! t2 E$ M - count1=0;
- Y- f4 m* Y/ Z - flag3=0;- x) C+ l) N, @( {
- __HAL_RTC_ALARM_DISABLE_IT(&RTCHandle, RTC_IT_ALRA);: S' k: x2 X, v- k( p5 ~1 V. `
- __HAL_RTC_ALARM_CLEAR_FLAG(&RTCHandle, RTC_IT_ALRA);
8 N8 m! N) ]2 S0 m& a3 _7 J - HAL_TIM_Base_Stop(&TimHandle); //定时器停止+ ^ q& G. g4 x+ D
- HAL_RTCEx_DeactivateWakeUpTimer(&RTCHandle);
( Z. m0 ~& A7 d' k0 _ - HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);//调用库函数进入STOP模式4 k" f+ G- e; d; j
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- 计算方法:例如休眠4s
3 D S+ S! j& _/ p- R7 }& `( G0 ?+ m - /* RTC Wakeup Interrupt Generation:( z7 }6 R7 r) N7 @! O/ b- O
- Wakeup Time Base = (RTC_WAKEUPCLOCK_RTCCLK_DIV /(LSE or LSI))
1 @; p! h N- M. P& t - Wakeup Time = Wakeup Time Base * WakeUpCounter
& V. l7 i$ ~1 T( A% C - = (RTC_WAKEUPCLOCK_RTCCLK_DIV /(LSE or LSI)) * WakeUpCounter
% x% K* W- \% y' d4 N+ Z2 K3 i3 K8 V - ==> WakeUpCounter = Wakeup Time / Wakeup Time BaseTo configure the wake up timer to 4s the WakeUpCounter is set to 0x1FFF:7 p' ~3 ^- c% q o& K
- RTC_WAKEUPCLOCK_RTCCLK_DIV = RTCCLK_Div16 = 16
0 @1 {& a5 r0 E' Q. W4 g- x - Wakeup Time Base = 16 /(~39.000KHz) = ~0,410 ms
, o* w. n' f( Q2 [: G3 Y5 I - Wakeup Time = ~4s = 0,410ms * WakeUpCounter
5 ~! [' p4 r$ E - ==> WakeUpCounter = ~4s/0,410ms = 9750 = 0x2616 */
1 _7 S8 y8 X l5 G- S7 v7 I- A3 }; N- w - HAL_RTCEx_SetWakeUpTimer_IT(&RTCHandle, 0x2616, RTC_WAKEUPCLOCK_RTCCLK_DIV16);
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" F6 E$ R" o0 p u6 q. L. n% ]% d局限性:用内部时钟LSI,大小固定导致Wakeup Time Base 被限制。 Wakeup Time(最大)=0.41ms*65535(0xffff)=26.869s,可能达不到休眠时间要求。2 m/ M# W) w# f/ y1 l
! n: l2 o2 u+ S' [% E3 U! H1 Y另一种方法:改HAL_RTCEx_SetWakeUpTimer_IT(&RTCHandle, 2, RTC_WAKEUPCLOCK_CK_SPRE_16BITS);2 w& {6 k' D# d" }- d0 L
- a! U7 g2 S0 b }9 G- T& l/ x* a这里RTC_WAKEUPCLOCK_CK_SPRE_16BITS是设置CR寄存器中的低三位,唤醒时钟选择,这里选择1hz,2表示工作2S后进入唤醒中断,这个数随便改,改成多少就是休眠多少时间。
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2、串口中断唤醒( O8 H# r2 \, N. B( k- O7 b
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唤醒机制:在MCU进入STOP状态后,不能直接通过UART等外设唤醒,在MCU进入STOP前将RX脚设为EXTI模式,并使能对应的中断。唤醒后重新初始化串口、配置时钟。(这里贴两份代码,一份是我参考的百战天虫的code,另一份我自己的). w, v0 O/ z( _! J5 Z+ M) {
+ x' ^. {1 r2 u: H# _8 Yby:百战天虫
; P$ u( R- w# C; V; K- L- void Rx_Init()5 @; \9 h: v. ^+ k* p; L2 x
- {
5 N& U& W. X. B' p# A" a - GPIO_InitTypeDef GPIO_InitStruct;
2 D1 ?7 B+ u1 h* t, @3 v/ H5 A4 v6 H - __HAL_RCC_GPIOA_CLK_ENABLE();
- w' `6 k; a# g4 k - // 配置UART1的Rx引脚为EXIT模式5 ] W+ ^4 o3 p9 |
- GPIO_InitStruct.Pin = USARTx_RX_PIN;3 q+ G- j# D6 S7 ]
- GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING; // 特别注意这里要使用中断模式
7 {) [: ]2 `0 j7 O - GPIO_InitStruct.Pull = GPIO_PULLUP;
~5 L* K8 I( R0 ~, T( n - HAL_GPIO_Init(USARTx_TX_GPIO_PORT, &GPIO_InitStruct);- K: g& G, v, z5 q
- HAL_NVIC_SetPriority(EXTI4_15_IRQn, 2, 0);9 M" b3 o& F3 x0 D' C, V9 e
- HAL_NVIC_EnableIRQ(EXTI4_15_IRQn);
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- void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin)* d2 h. x, b& X) H
- {$ }+ C5 t' ^: A! H/ ^& z
- if(GPIO_Pin==USARTx_RX_PIN)
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7 }, Z5 I) s- L* h$ y- \6 A - // HAL_NVIC_EnableIRQ(SysTick_IRQn);
# f2 v" P" @0 k, F9 h - SystemClockConfig_STOP();//停机模式后唤醒,恢复时钟源
& M, O, E3 w2 I* ]& X - HAL_Init();
3 U2 n1 F( m8 P5 N. ?+ \' P - SystemClock_Config();7 j+ x3 s( [1 {, g
- SystemPower_Config();0 ?( k9 o" X( A, |7 s/ C& q
- HAL_SPI_DeInit(&hspi1);% s# f# i0 K4 Z9 T
- HAL_GPIO_DeInit(GPIOA,GPIO_PIN_10);//串口重新初始化时HAL_UART_Init()函数会判断if(huart->State == HAL_UART_STATE_RESET),此时才会执行HAL_UART_MspInit(huart),配置串口IO口,这句话必须有!4 l- L8 [' z& U" u4 S! f3 [
- __HAL_RCC_GPIOA_CLK_ENABLE();
0 u# ~. p& v# F - __HAL_RCC_GPIOA_CLK_ENABLE();
% a2 a$ G# U! e6 s - __HAL_RCC_GPIOB_CLK_ENABLE();
4 ?2 o$ H. |4 Z( O1 \7 Z - SPI_GPIO_Init();
4 {: }5 X5 S8 U; |+ V3 ]2 [' {/ W& G7 q - UartHandle.Instance = USARTx;
( T2 H$ c4 G$ n* S" X - UartHandle.Init.BaudRate = uart_baud;$ e1 C% x, @' f) l
- UartHandle.Init.WordLength = UART_WORDLENGTH_8B;, U! d+ u4 O: d. V, j: V5 U8 U7 x% Y
- UartHandle.Init.StopBits = UART_STOPBITS_1;, f' q# b' G" X" P6 c; i
- UartHandle.Init.Parity = UART_PARITY_NONE;
+ W0 q& P' @( I/ P- J - UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
' k( G" j G/ q! U - UartHandle.Init.Mode = UART_MODE_TX_RX;' J; k7 h: h# r+ M% q
- GPIO_InitTypeDef GPIO_InitStruct;
& r4 ?* s7 L, G _' N9 a9 n( V - /*##-1- Enable peripherals and GPIO Clocks #################################*/2 O( g" v; t" i1 b# e
- /* Enable GPIO TX/RX clock */7 ^% V' j) T9 i, i( W& e; T) i
- USARTx_TX_GPIO_CLK_ENABLE();2 d# {; |& m. g/ E
- USARTx_RX_GPIO_CLK_ENABLE();
; S6 R4 r1 M9 j; x0 n - /* Enable USART2 clock */
# J+ _2 f- X! D. e" Q/ R+ X1 Q - USARTx_CLK_ENABLE();7 _" ~' x$ X' ?& a6 Q+ j. E
- /*##-2- Configure peripheral GPIO ##########################################*/; r( M! A7 b, E9 ^. V
- /* UART TX GPIO pin configuration */
: z1 w- y% ]: ~+ x - GPIO_InitStruct.Pin = USARTx_TX_PIN;; s/ P! E/ T, n+ o( i+ Q0 {
- GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
, q E/ R! z5 y6 o l. ?& Y/ X1 M" R - GPIO_InitStruct.Pull = GPIO_NOPULL;% h" C) m9 j4 P$ K- N
- GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH ;
1 ?( X/ o8 ^5 u" A/ Q) Y1 M9 b. t - GPIO_InitStruct.Alternate = USARTx_TX_AF;
1 J" j7 Y/ j: E |- v* a/ d' c - HAL_GPIO_Init(USARTx_TX_GPIO_PORT, &GPIO_InitStruct);3 Y- E9 c* b/ a. y* G. }# K
- /* UART RX GPIO pin configuration */
+ L, p* p' Y7 _) [' y S$ F - GPIO_InitStruct.Pin = USARTx_RX_PIN;
, O. [( x4 m9 d) ] - GPIO_InitStruct.Alternate = USARTx_RX_AF;
7 D" v; @+ K+ k3 I - HAL_GPIO_Init(USARTx_RX_GPIO_PORT, &GPIO_InitStruct);
}2 H1 M( M2 X - HAL_NVIC_DisableIRQ(EXTI4_15_IRQn);/ \" Y, J; V- A2 B. u: }3 I3 S/ A
- __HAL_GPIO_EXTI_CLEAR_IT(USARTx_RX_PIN);
7 `9 Q" P% O9 ^& Z. r) y - HAL_NVIC_SetPriority(USARTx_IRQn, 4, 0);1 z, |' l& u$ q1 G5 c
- HAL_NVIC_EnableIRQ(USARTx_IRQn);
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