01. 概述
# u Q7 H" i8 ~2 I$ V很多单片机都有低功耗模式,STM32F4 也不例外。在系统或电源复位以后,微控制器处于运行状态。运行状态下的 HCLK 为 CPU 提供时钟,内核执行程序代码。当 CPU 不需继续运行时,可以利用多个低功耗模式来节省功耗,例如等待某个外部事件时。用户需要根据最低电源消耗,最快速启动时间和可用的唤醒源等条件,选定一个最佳的低功耗模式。
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在stm32f4xx_pwr.c 和stm32f4xx_pwr.h 文件中。/ ~6 ?; e2 E* D' o j0 f* V: h0 K
; T k4 B8 i( ~. `" m& g02. 相关类型
+ U! g( L+ s/ i5 {PWR_PVD_detection_level
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- /** @defgroup PWR_PVD_detection_level
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- */
( q1 S: [6 v0 m9 L - #define PWR_PVDLevel_0 PWR_CR_PLS_LEV0! H" o# r. h7 f% q A+ G: Z! u
- #define PWR_PVDLevel_1 PWR_CR_PLS_LEV1, P1 M' I/ G8 @8 B: V
- #define PWR_PVDLevel_2 PWR_CR_PLS_LEV2$ [6 X2 M N. E# d% {: p7 [+ Q
- #define PWR_PVDLevel_3 PWR_CR_PLS_LEV3. |) G, f' m+ x) y. P+ f Q1 {
- #define PWR_PVDLevel_4 PWR_CR_PLS_LEV4
) j7 j0 R! O5 \- q7 f! x6 D1 ^ - #define PWR_PVDLevel_5 PWR_CR_PLS_LEV5
2 v5 W5 q& k" a) k - #define PWR_PVDLevel_6 PWR_CR_PLS_LEV6
* z$ t- m* f. `! X - #define PWR_PVDLevel_7 PWR_CR_PLS_LEV7
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1 l6 W5 d$ C3 I% P* x! f, }- #define IS_PWR_PVD_LEVEL(LEVEL) (((LEVEL) == PWR_PVDLevel_0) || ((LEVEL) == PWR_PVDLevel_1)|| \ x6 Y+ ?7 q* _! p
- ((LEVEL) == PWR_PVDLevel_2) || ((LEVEL) == PWR_PVDLevel_3)|| \
6 j& R4 C+ C6 B% U r- r - ((LEVEL) == PWR_PVDLevel_4) || ((LEVEL) == PWR_PVDLevel_5)|| \
$ ]4 s9 w _: u# s0 C" p& o - ((LEVEL) == PWR_PVDLevel_6) || ((LEVEL) == PWR_PVDLevel_7))
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3 o6 r) ]) h2 m7 ^ \. e1 hPWR_Regulator_state_in_STOP_mode" D' ]1 c& n. ]/ C. W f
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- /** @defgroup PWR_Regulator_state_in_STOP_mode ) ]" E7 p- W; J4 C
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- */. b+ }, u$ M" Q. u& {
- #define PWR_MainRegulator_ON ((uint32_t)0x00000000)
3 V( G/ F. l0 L2 v - #define PWR_LowPowerRegulator_ON PWR_CR_LPDS
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- /* --- PWR_Legacy ---*/) M, D8 q$ S0 w2 P; ^# m' V5 W
- #define PWR_Regulator_ON PWR_MainRegulator_ON
1 D3 F0 {; n1 A7 t - #define PWR_Regulator_LowPower PWR_LowPowerRegulator_ON
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- #define IS_PWR_REGULATOR(REGULATOR) (((REGULATOR) == PWR_MainRegulator_ON) || \
1 Y" p& F# `) J6 `' j0 A - ((REGULATOR) == PWR_LowPowerRegulator_ON))
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PWR_Regulator_state_in_UnderDrive_mode6 k n: e2 [ Q) e9 a. F
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- /** @defgroup PWR_Regulator_state_in_UnderDrive_mode
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- */7 A: G4 M. [# ^$ ], A( k/ y4 y: Y
- #define PWR_MainRegulator_UnderDrive_ON PWR_CR_MRUDS
, `: F- C% F; \4 C - #define PWR_LowPowerRegulator_UnderDrive_ON ((uint32_t)(PWR_CR_LPDS | PWR_CR_LPUDS)): ]0 L! ]% k+ m+ ]
3 [) l# F3 r" k) \3 N1 V% |- #define IS_PWR_REGULATOR_UNDERDRIVE(REGULATOR) (((REGULATOR) == PWR_MainRegulator_UnderDrive_ON) || \
8 }' J. E! ^) r - ((REGULATOR) == PWR_LowPowerRegulator_UnderDrive_ON))
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: s1 B% n5 d: T3 b _PWR_STOP_mode_entry, a! _& z5 c ^7 S5 j- i3 x
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- /** @defgroup PWR_STOP_mode_entry 8 {7 R U) {* z' R' k% r
- * @{
7 I# s' X7 W( V2 V5 K - */
) \0 u# C& n$ L - #define PWR_STOPEntry_WFI ((uint8_t)0x01)# O! y5 x* F9 R& k2 `; E( f: Y' s
- #define PWR_STOPEntry_WFE ((uint8_t)0x02)
8 m2 N4 ^* R; l6 Z! _ - #define IS_PWR_STOP_ENTRY(ENTRY) (((ENTRY) == PWR_STOPEntry_WFI) || ((ENTRY) == PWR_STOPEntry_WFE))
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PWR_Regulator_Voltage_Scale% G, K R0 ?6 F" G
* g& ^: `( f' V$ b( [- \- /** @defgroup PWR_Regulator_Voltage_Scale 6 B/ w- l# ~, @ h" Z
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- */4 {* b: t# G6 t l) A, [
- #define PWR_Regulator_Voltage_Scale1 ((uint32_t)0x0000C000)
0 h5 [6 E- n) D+ I - #define PWR_Regulator_Voltage_Scale2 ((uint32_t)0x00008000)! f4 x/ |" L+ j
- #define PWR_Regulator_Voltage_Scale3 ((uint32_t)0x00004000)
! I, i; I3 d7 _ - #define IS_PWR_REGULATOR_VOLTAGE(VOLTAGE) (((VOLTAGE) == PWR_Regulator_Voltage_Scale1) || \
% [0 h8 h0 u0 j( f- e4 @; J - ((VOLTAGE) == PWR_Regulator_Voltage_Scale2) || \
' [6 E8 g6 _0 g; V0 E' _7 o - ((VOLTAGE) == PWR_Regulator_Voltage_Scale3))
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: O" g0 ?8 R2 q6 }, | \6 xPWR_Flag* o/ V! N' {- Q4 i0 a$ t
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- /** @defgroup PWR_Flag . q; f5 g& d6 c z: n
- * @{
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- #define PWR_FLAG_WU PWR_CSR_WUF
+ k# Q! | X: G1 @4 y% g3 ^7 }8 I - #define PWR_FLAG_SB PWR_CSR_SBF
+ `, T, G- h1 l- n. t - #define PWR_FLAG_PVDO PWR_CSR_PVDO/ w4 t! Q k' T
- #define PWR_FLAG_BRR PWR_CSR_BRR, e& c# r* A5 N: K$ S/ o
- #define PWR_FLAG_VOSRDY PWR_CSR_VOSRDY
# @/ v) u) ` a" ~" v - #define PWR_FLAG_ODRDY PWR_CSR_ODRDY
, i' y8 L$ K& q$ { - #define PWR_FLAG_ODSWRDY PWR_CSR_ODSWRDY7 ~1 |4 E9 M8 z% o) j. z
- #define PWR_FLAG_UDRDY PWR_CSR_UDSWRDY
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' m- u! S2 F6 [( x( \- /* --- FLAG Legacy ---*/) }$ ~: ]0 S+ \2 ~+ x$ q
- #define PWR_FLAG_REGRDY PWR_FLAG_VOSRDY
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3 L% T8 c/ W0 c7 P/ k- #define IS_PWR_GET_FLAG(FLAG) (((FLAG) == PWR_FLAG_WU) || ((FLAG) == PWR_FLAG_SB) || \. k: A' P) c, o5 ^& I+ N7 z
- ((FLAG) == PWR_FLAG_PVDO) || ((FLAG) == PWR_FLAG_BRR) || \+ W5 T, m% X8 l* T$ Q2 b5 T2 X/ q# U
- ((FLAG) == PWR_FLAG_VOSRDY) || ((FLAG) == PWR_FLAG_ODRDY) || \
% t$ Y4 g: J* m+ }. Q - ((FLAG) == PWR_FLAG_ODSWRDY) || ((FLAG) == PWR_FLAG_UDRDY))! q" I; p- [9 x7 Q$ ?0 C( ?# _& c
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- #define IS_PWR_CLEAR_FLAG(FLAG) (((FLAG) == PWR_FLAG_WU) || ((FLAG) == PWR_FLAG_SB) || \" e2 i9 e. G' X' r) i9 d9 A
- ((FLAG) == PWR_FLAG_UDRDY))
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$ i" D) E2 R- k0 y03. 相关函数& ?$ v+ z/ @+ P. ^) n2 {7 T
+ ?7 u4 H# t6 C2 w- /* Function used to set the PWR configuration to the default reset state ******/
' E8 S( Y [9 O" R - void PWR_DeInit(void);
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$ ^4 X1 U% A: g! {( A- /* Backup Domain Access function **********************************************/ ) ]. ]/ t3 L+ q8 M; _
- void PWR_BackupAccessCmd(FunctionalState NewState);
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- /* PVD configuration functions ************************************************/
, T) o6 O2 S8 J - void PWR_PVDLevelConfig(uint32_t PWR_PVDLevel);1 \: l* T5 p6 k
- void PWR_PVDCmd(FunctionalState NewState);
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- void PWR_WakeUpPinCmd(FunctionalState NewState);7 x: \1 z% S: h( d
' k9 T4 {- C# i" O, U- /* Main and Backup Regulators configuration functions *************************/
$ s5 G2 b! z- r! M8 Q8 u - void PWR_BackupRegulatorCmd(FunctionalState NewState);
; t( {, Z* `6 r - void PWR_MainRegulatorModeConfig(uint32_t PWR_Regulator_Voltage);
; o% }, \; ]* i0 F' P T( u - void PWR_OverDriveCmd(FunctionalState NewState);
8 |; V5 w% w0 p+ U) X) t( v - void PWR_OverDriveSWCmd(FunctionalState NewState);# }' g: i6 T" x& [2 w, G$ g7 x
- void PWR_UnderDriveCmd(FunctionalState NewState);
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, |4 t2 Y4 s- ~( U" j1 ^# I+ a- /* FLASH Power Down configuration functions ***********************************/ 2 X* Q9 @- W/ f# {
- void PWR_FlashPowerDownCmd(FunctionalState NewState);% P+ b$ d$ a9 E. G K4 I
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- /* Low Power modes configuration functions ************************************/ ! l: }" G a! {* N# K) n" J
- void PWR_EnterSTOPMode(uint32_t PWR_Regulator, uint8_t PWR_STOPEntry);4 ]4 E8 L' O7 p; a% r
- void PWR_EnterUnderDriveSTOPMode(uint32_t PWR_Regulator, uint8_t PWR_STOPEntry);
6 i/ j% @1 |& q* b7 U3 @) U/ n9 ` - void PWR_EnterSTANDBYMode(void);& V+ T. ?; M* d! L# _; |7 ]" j
% {% F4 X( \8 e- N# ~- /* Flags management functions *************************************************/ ( r- A. E# c; ?) j
- FlagStatus PWR_GetFlagStatus(uint32_t PWR_FLAG);4 n6 D; q1 Y3 c3 e7 g; `8 Q
- void PWR_ClearFlag(uint32_t PWR_FLAG);
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* s; [0 b. y: k9 o; p" s04. 结构体封装6 t7 F" x* ~! r
- /**
2 }+ h# H- [9 ^( i8 c) B - * @brief Power Control
7 G" b! ?3 G5 f# h& \8 l- u - */
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, L: Z; d/ }; f, R# Z/ K- typedef struct
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- __IO uint32_t CR; /*!< PWR power control register, Address offset: 0x00 */
- |7 l1 S8 b) m1 V4 _+ K - __IO uint32_t CSR; /*!< PWR power control/status register, Address offset: 0x04 */+ k5 W) b/ L9 y( y0 t: Z
- } PWR_TypeDef;
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