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# N7 ]$ s8 z6 B1、定时休眠唤醒code: K, D( t1 H; q( A6 O; {) v
- HAL_Delay(2000);//进行采样的时间1 g, f3 n2 A+ F9 y# P' J0 @
- HAL_RTCEx_DeactivateWakeUpTimer(&RTCHandle);
' p8 f6 f* s1 V( `5 u - HAL_RTCEx_SetWakeUpTimer_IT(&RTCHandle, 2, RTC_WAKEUPCLOCK_RTCCLK_DIV16);
8 o. x, j6 x7 j% [ - HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);//调用库函数进入STOP模式
. F4 H9 q( d) C. p - SystemClockConfig_STOP();//停机模式后唤醒,恢复时钟源
4 e t1 X m3 d8 |8 T/ n, \ w2 U1 n - count1++;
5 n; b: {+ A4 E$ r' [' y - while(count1==1)//循环的次数2 Z* Q# {" u7 b+ X
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- Rx_Init();
* n/ [0 M4 f) `" ? - count1=0;$ B" {+ N+ `( i" R
- flag3=0;# _3 _5 p$ Z" ]( n7 D
- __HAL_RTC_ALARM_DISABLE_IT(&RTCHandle, RTC_IT_ALRA);9 M5 G6 b( ~5 [) S( B
- __HAL_RTC_ALARM_CLEAR_FLAG(&RTCHandle, RTC_IT_ALRA);* y! {9 B1 X! F* o2 }: P% q
- HAL_TIM_Base_Stop(&TimHandle); //定时器停止) ^% o. U4 f7 N2 H1 a5 k3 u) F
- HAL_RTCEx_DeactivateWakeUpTimer(&RTCHandle);$ }! e g" L1 a- w! l w/ T8 r" r
- HAL_PWR_EnterSTOPMode(PWR_LOWPOWERREGULATOR_ON, PWR_STOPENTRY_WFI);//调用库函数进入STOP模式, F* u+ P( f3 D
- }
4 L& d3 L/ j4 Y - 计算方法:例如休眠4s
8 A8 G/ V# E8 B: V- q- N u) I4 M - /* RTC Wakeup Interrupt Generation:
+ V' ~$ `- b' ~ R3 V2 a - Wakeup Time Base = (RTC_WAKEUPCLOCK_RTCCLK_DIV /(LSE or LSI))
5 ~9 m0 o4 }- f - Wakeup Time = Wakeup Time Base * WakeUpCounter6 r3 a8 ?3 }! l8 L2 j8 I
- = (RTC_WAKEUPCLOCK_RTCCLK_DIV /(LSE or LSI)) * WakeUpCounter$ M1 a" f( E6 T; \$ ]
- ==> WakeUpCounter = Wakeup Time / Wakeup Time BaseTo configure the wake up timer to 4s the WakeUpCounter is set to 0x1FFF:
3 } v. w! `, f; ?5 n& \ - RTC_WAKEUPCLOCK_RTCCLK_DIV = RTCCLK_Div16 = 16& l3 ?& x( F! x+ v9 x8 h
- Wakeup Time Base = 16 /(~39.000KHz) = ~0,410 ms, X. i, O: o1 a. ]0 r. P2 t
- Wakeup Time = ~4s = 0,410ms * WakeUpCounter
) ^9 u) y5 i. k. n/ ^ - ==> WakeUpCounter = ~4s/0,410ms = 9750 = 0x2616 */0 o3 ?; g1 P" I/ E: Y5 N$ @8 V
- HAL_RTCEx_SetWakeUpTimer_IT(&RTCHandle, 0x2616, RTC_WAKEUPCLOCK_RTCCLK_DIV16);
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% x$ M) `9 R+ h/ g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。" {7 _, v' C$ e7 L
- F" O0 M$ a+ q) J; h7 _另一种方法:改HAL_RTCEx_SetWakeUpTimer_IT(&RTCHandle, 2, RTC_WAKEUPCLOCK_CK_SPRE_16BITS);
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* p# U# p; p( _( p b0 t9 ]5 N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。* f. @+ g; A! g) Q
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2、串口中断唤醒$ C" R! [8 W% J% w$ r. e2 ?9 V
& D. I$ }" |' S( a4 v+ ~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)$ @1 T4 Z. u& |0 m& G7 \
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by:百战天虫& z4 L& W) \! J/ D v
- void Rx_Init()6 V6 \4 m7 n* q$ H/ `
- {
9 R0 [& D3 F3 w' c - GPIO_InitTypeDef GPIO_InitStruct;
' E4 P# P" z" ]: N - __HAL_RCC_GPIOA_CLK_ENABLE();- l+ x* i) ~/ }4 D7 m
- // 配置UART1的Rx引脚为EXIT模式
" n5 G2 e8 v2 c( Q- m2 P Y- e - GPIO_InitStruct.Pin = USARTx_RX_PIN;
4 f; V! r4 w* i4 Z - GPIO_InitStruct.Mode = GPIO_MODE_IT_FALLING; // 特别注意这里要使用中断模式" G/ q2 q$ g" _( D$ H) {
- GPIO_InitStruct.Pull = GPIO_PULLUP;9 L R- x2 O7 l9 O6 s) H. E
- HAL_GPIO_Init(USARTx_TX_GPIO_PORT, &GPIO_InitStruct);
( v/ a* K/ L& O: M4 { - HAL_NVIC_SetPriority(EXTI4_15_IRQn, 2, 0);
9 k! i1 A( r: N$ D& N - HAL_NVIC_EnableIRQ(EXTI4_15_IRQn);: o6 `7 |: g6 t8 P# `
- }
0 {# ~( |7 d2 ]9 x; _' j* j - void HAL_GPIO_EXTI_Callback(uint16_t GPIO_Pin), \* z$ I5 g- z j
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- if(GPIO_Pin==USARTx_RX_PIN)$ b' R2 J# K9 C6 O
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- // HAL_NVIC_EnableIRQ(SysTick_IRQn);. G/ b6 S2 K- x; Y* n1 t/ W
- SystemClockConfig_STOP();//停机模式后唤醒,恢复时钟源
: u. n' Z) O+ T9 D0 j - HAL_Init();
8 ^* a% e+ e! q" z& H' \: p( Z - SystemClock_Config();2 J% v: }% O5 Y) ` L
- SystemPower_Config();1 ?0 f. U/ B' E Q) z
- HAL_SPI_DeInit(&hspi1);' U$ Q" y( E) }
- 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!
5 G; o1 V2 b& X8 h. _ U - __HAL_RCC_GPIOA_CLK_ENABLE();( `. o. k1 @ ^5 W8 v7 W
- __HAL_RCC_GPIOA_CLK_ENABLE();
3 f0 ^2 D0 v( w4 Z! u& T. c - __HAL_RCC_GPIOB_CLK_ENABLE();. Q. p2 q6 t9 H9 R
- SPI_GPIO_Init();/ J4 E2 l: Y) R2 `
- UartHandle.Instance = USARTx;
; V' N8 W& q3 T9 N- s. R - UartHandle.Init.BaudRate = uart_baud;
]( L0 Q5 y* }# Q- \% G8 l' p2 u - UartHandle.Init.WordLength = UART_WORDLENGTH_8B;; o9 ?/ d/ s0 I, o9 l( d
- UartHandle.Init.StopBits = UART_STOPBITS_1;
6 V: [$ @4 Z$ r9 C - UartHandle.Init.Parity = UART_PARITY_NONE;) o' w& M: w1 S& z0 G, T
- UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
+ T5 R# |/ T7 P - UartHandle.Init.Mode = UART_MODE_TX_RX;
* n% _* \- o" _ - GPIO_InitTypeDef GPIO_InitStruct;( L4 y5 z2 z1 o7 D! B3 I# N
- /*##-1- Enable peripherals and GPIO Clocks #################################*/
: n* \! P/ K6 |8 p - /* Enable GPIO TX/RX clock */, [/ Q# M3 r& J8 k5 g9 `
- USARTx_TX_GPIO_CLK_ENABLE();8 h; |; A% C) Z1 D* r
- USARTx_RX_GPIO_CLK_ENABLE();2 m8 M- c0 p/ t2 L
- /* Enable USART2 clock */
9 T+ A) y6 b. { - USARTx_CLK_ENABLE();
/ l$ O; \) }1 l1 O5 S - /*##-2- Configure peripheral GPIO ##########################################*/5 _ n4 H" Z- B2 }, d; }
- /* UART TX GPIO pin configuration */9 {, `" e7 n+ r, N! H
- GPIO_InitStruct.Pin = USARTx_TX_PIN;! c: _9 J! P& t) C4 y6 v) s
- GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;6 z- I; }& ~ R/ u. C \& I, w
- GPIO_InitStruct.Pull = GPIO_NOPULL;
$ W' k4 ]" B! P R - GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_HIGH ;0 \7 k1 Z0 S/ j
- GPIO_InitStruct.Alternate = USARTx_TX_AF;
; ]% l* S. X8 c - HAL_GPIO_Init(USARTx_TX_GPIO_PORT, &GPIO_InitStruct);
0 [2 Z7 F+ E3 A( z7 l - /* UART RX GPIO pin configuration */! |: r3 e/ T/ T5 x. L! V( G0 E
- GPIO_InitStruct.Pin = USARTx_RX_PIN;
- K, o' c5 P% R - GPIO_InitStruct.Alternate = USARTx_RX_AF;
" t1 Y5 O/ j' ^, L) a" W - HAL_GPIO_Init(USARTx_RX_GPIO_PORT, &GPIO_InitStruct);- M g9 D( e k, u3 j& f, n# G4 Z
- HAL_NVIC_DisableIRQ(EXTI4_15_IRQn);5 i X2 P8 G% C) Y! e9 l( d, f
- __HAL_GPIO_EXTI_CLEAR_IT(USARTx_RX_PIN);/ Z2 U. c1 f3 v u
- HAL_NVIC_SetPriority(USARTx_IRQn, 4, 0);( B, ]2 f' y& y" g2 C a
- HAL_NVIC_EnableIRQ(USARTx_IRQn);
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