01. 概述& M1 {" }0 h3 ~( z+ }7 j
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。! a/ P) s. ]# y9 Y; G; ?9 Y$ [/ K
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在stm32f4xx_pwr.c 和stm32f4xx_pwr.h 文件中。* e# Y$ A, {- a, r
1 ?; k3 A5 g: X$ R& ~( ~: f* n" W02. 相关类型: I+ B! I; a4 Q1 \, l9 _/ i/ E
PWR_PVD_detection_level
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% [' q( Z- w4 _- O$ C, u# n+ D- /** @defgroup PWR_PVD_detection_level
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- #define PWR_PVDLevel_0 PWR_CR_PLS_LEV0
$ ?$ E1 ]9 H U - #define PWR_PVDLevel_1 PWR_CR_PLS_LEV1
. j: a- M$ D, f: ?: Y: x7 {7 k0 D1 H$ j - #define PWR_PVDLevel_2 PWR_CR_PLS_LEV2# P8 z# v* T7 n9 R( M
- #define PWR_PVDLevel_3 PWR_CR_PLS_LEV3
' P$ M: U8 X+ K( w' U8 d - #define PWR_PVDLevel_4 PWR_CR_PLS_LEV45 g3 |! K- h I- ~
- #define PWR_PVDLevel_5 PWR_CR_PLS_LEV5
8 ~8 A& V+ G0 s* B) l - #define PWR_PVDLevel_6 PWR_CR_PLS_LEV61 A: q7 w! T w
- #define PWR_PVDLevel_7 PWR_CR_PLS_LEV7
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, }8 M h) P/ r! i1 g% {: v- #define IS_PWR_PVD_LEVEL(LEVEL) (((LEVEL) == PWR_PVDLevel_0) || ((LEVEL) == PWR_PVDLevel_1)|| \
* l* l6 A2 w q1 }! g - ((LEVEL) == PWR_PVDLevel_2) || ((LEVEL) == PWR_PVDLevel_3)|| \1 M# m1 D% H" H0 {! f6 P
- ((LEVEL) == PWR_PVDLevel_4) || ((LEVEL) == PWR_PVDLevel_5)|| \. P% n" E: ~7 @: ~0 ~
- ((LEVEL) == PWR_PVDLevel_6) || ((LEVEL) == PWR_PVDLevel_7))
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PWR_Regulator_state_in_STOP_mode
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- /** @defgroup PWR_Regulator_state_in_STOP_mode
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- */
8 A7 y( [: d+ H - #define PWR_MainRegulator_ON ((uint32_t)0x00000000)
C! R6 h8 {" F - #define PWR_LowPowerRegulator_ON PWR_CR_LPDS% ?2 H6 C5 v+ ^/ E5 \4 w7 }
- 5 ^0 U: |: N# R) [& D/ x
- /* --- PWR_Legacy ---*/
8 |) n0 J: ]' ~9 E - #define PWR_Regulator_ON PWR_MainRegulator_ON
9 z' C6 l/ o/ J0 J6 v - #define PWR_Regulator_LowPower PWR_LowPowerRegulator_ON
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- #define IS_PWR_REGULATOR(REGULATOR) (((REGULATOR) == PWR_MainRegulator_ON) || \+ u5 F6 r. g p8 R" Z2 y
- ((REGULATOR) == PWR_LowPowerRegulator_ON))
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2 x8 | B# Z e( F o; ~ _, t) UPWR_Regulator_state_in_UnderDrive_mode
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- /** @defgroup PWR_Regulator_state_in_UnderDrive_mode
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- */
! M' U% s: d+ C& O; q - #define PWR_MainRegulator_UnderDrive_ON PWR_CR_MRUDS
0 \- W: `9 D7 A - #define PWR_LowPowerRegulator_UnderDrive_ON ((uint32_t)(PWR_CR_LPDS | PWR_CR_LPUDS))
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- #define IS_PWR_REGULATOR_UNDERDRIVE(REGULATOR) (((REGULATOR) == PWR_MainRegulator_UnderDrive_ON) || \/ U6 D6 y- Q% J6 Y' q
- ((REGULATOR) == PWR_LowPowerRegulator_UnderDrive_ON))
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% n; B* z6 w- N3 \. OPWR_STOP_mode_entry3 n t2 P- X6 k7 W
' w5 z" z: L6 ?) {% e$ C- /** @defgroup PWR_STOP_mode_entry 8 v0 Z' l# {0 v2 k' e" c( @
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- #define PWR_STOPEntry_WFI ((uint8_t)0x01) t. h& Q) v& k7 `6 {! P N
- #define PWR_STOPEntry_WFE ((uint8_t)0x02)$ H; I& r: T v
- #define IS_PWR_STOP_ENTRY(ENTRY) (((ENTRY) == PWR_STOPEntry_WFI) || ((ENTRY) == PWR_STOPEntry_WFE))
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PWR_Regulator_Voltage_Scale( l3 @1 m+ b1 q+ F: Z, x
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- /** @defgroup PWR_Regulator_Voltage_Scale
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- #define PWR_Regulator_Voltage_Scale1 ((uint32_t)0x0000C000)& T$ t- y y7 a" r
- #define PWR_Regulator_Voltage_Scale2 ((uint32_t)0x00008000); e4 H+ e1 j7 \1 E3 Y. q. g( J% J
- #define PWR_Regulator_Voltage_Scale3 ((uint32_t)0x00004000). @) c8 L9 D+ |, x0 f: O( L, E
- #define IS_PWR_REGULATOR_VOLTAGE(VOLTAGE) (((VOLTAGE) == PWR_Regulator_Voltage_Scale1) || \ Z9 h+ z1 e2 |. \& K* P8 Z+ N
- ((VOLTAGE) == PWR_Regulator_Voltage_Scale2) || \
6 i, O9 W) l% l - ((VOLTAGE) == PWR_Regulator_Voltage_Scale3))
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PWR_Flag
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- /** @defgroup PWR_Flag ) j* }, u! H9 Y: B1 {6 K0 y$ X u
- * @{
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( a/ x* Q8 @: L. W - #define PWR_FLAG_WU PWR_CSR_WUF
) M1 j2 g5 B O, V - #define PWR_FLAG_SB PWR_CSR_SBF
- W, I. }0 ?$ k0 H' \ x - #define PWR_FLAG_PVDO PWR_CSR_PVDO
3 ]* L$ ^8 @2 c: c( E) t/ z - #define PWR_FLAG_BRR PWR_CSR_BRR! M3 E( s6 y7 E' ^
- #define PWR_FLAG_VOSRDY PWR_CSR_VOSRDY
7 a; z" [1 s0 I+ M6 ?6 A5 F - #define PWR_FLAG_ODRDY PWR_CSR_ODRDY- V" L. r' M) L; S0 J
- #define PWR_FLAG_ODSWRDY PWR_CSR_ODSWRDY
, m( _5 i: o2 @; R - #define PWR_FLAG_UDRDY PWR_CSR_UDSWRDY) C5 R9 [. H+ A
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- /* --- FLAG Legacy ---*/" E9 t. q. g. G( \# g ~
- #define PWR_FLAG_REGRDY PWR_FLAG_VOSRDY
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- #define IS_PWR_GET_FLAG(FLAG) (((FLAG) == PWR_FLAG_WU) || ((FLAG) == PWR_FLAG_SB) || \
3 }; d& A) r& N# t - ((FLAG) == PWR_FLAG_PVDO) || ((FLAG) == PWR_FLAG_BRR) || \# q c$ [6 p$ l! B4 b
- ((FLAG) == PWR_FLAG_VOSRDY) || ((FLAG) == PWR_FLAG_ODRDY) || \
4 |7 G; R" Q# L* e1 P9 ? - ((FLAG) == PWR_FLAG_ODSWRDY) || ((FLAG) == PWR_FLAG_UDRDY))1 f8 F1 u3 w" p# _$ y( r$ O
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6 [# |( b* Y3 ]* [3 n- G/ t4 f8 B- #define IS_PWR_CLEAR_FLAG(FLAG) (((FLAG) == PWR_FLAG_WU) || ((FLAG) == PWR_FLAG_SB) || \: W1 W* Z) z5 Q0 {% W6 d$ G$ v; V$ i
- ((FLAG) == PWR_FLAG_UDRDY))
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, @/ G2 F8 T0 W1 j03. 相关函数
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: j, L G! n6 H, e; k1 U- /* Function used to set the PWR configuration to the default reset state ******/
: E5 {% e; [9 h- V. f0 e& { - void PWR_DeInit(void);
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- /* Backup Domain Access function **********************************************/ $ P. R8 B' l7 p! K) H$ d
- void PWR_BackupAccessCmd(FunctionalState NewState);: v: U8 m0 S0 b9 ? d, C
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- /* PVD configuration functions ************************************************/
; U% y5 p- q' I - void PWR_PVDLevelConfig(uint32_t PWR_PVDLevel);
# g. K5 X+ l3 ?6 J7 r: F - void PWR_PVDCmd(FunctionalState NewState);$ E2 }! M+ Q5 p8 S; V" H0 J1 X+ a- }
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- void PWR_WakeUpPinCmd(FunctionalState NewState);& S, p4 ^; g; {% z6 b3 X$ y+ |# h: @
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- /* Main and Backup Regulators configuration functions *************************/
0 c' x+ r) e) O$ |% A - void PWR_BackupRegulatorCmd(FunctionalState NewState);
, ]+ y1 s0 d" K' ?- D+ f - void PWR_MainRegulatorModeConfig(uint32_t PWR_Regulator_Voltage);, ~. f* A# Q9 n
- void PWR_OverDriveCmd(FunctionalState NewState);
0 O/ z1 s1 N9 t6 v' \ - void PWR_OverDriveSWCmd(FunctionalState NewState);
' O2 d: }8 R' e! _" i- E - void PWR_UnderDriveCmd(FunctionalState NewState);
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# t- U$ C1 H) [- /* FLASH Power Down configuration functions ***********************************/ * I8 m2 v5 W9 b* w& U# p
- void PWR_FlashPowerDownCmd(FunctionalState NewState);) S3 u7 J: u& l
7 }; I$ o8 b: M) \) x+ J- /* Low Power modes configuration functions ************************************/ ! R& v1 r2 O' u+ j
- void PWR_EnterSTOPMode(uint32_t PWR_Regulator, uint8_t PWR_STOPEntry);# k2 F* u! F }" n# x' A/ ~* ~
- void PWR_EnterUnderDriveSTOPMode(uint32_t PWR_Regulator, uint8_t PWR_STOPEntry);
" D0 q$ O0 x4 x- W& `; g - void PWR_EnterSTANDBYMode(void);
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* ~1 h m4 A/ m- /* Flags management functions *************************************************/ " r3 x' g+ E9 p
- FlagStatus PWR_GetFlagStatus(uint32_t PWR_FLAG);# @- H* h% L, q! z3 y/ M
- void PWR_ClearFlag(uint32_t PWR_FLAG);0 T. X2 J8 T0 {2 R- M# w1 s
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04. 结构体封装
( E8 t: D% ^7 ] {5 j3 k9 ^( Y- /** 4 p8 V" N( \, y$ s5 U9 ?2 A4 B
- * @brief Power Control
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, I' P% y7 W/ z9 M* l( m- typedef struct
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# q2 m9 a. _ C7 I$ f - __IO uint32_t CR; /*!< PWR power control register, Address offset: 0x00 */: R, V: q. D0 |4 d7 s3 N! m1 y
- __IO uint32_t CSR; /*!< PWR power control/status register, Address offset: 0x04 */
, J3 E0 y: E h - } PWR_TypeDef;
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