01. 概述5 N Z1 |. |, {& f7 N
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。8 A0 U3 N+ e( h* [8 d
2 i v; |5 D) ?- c; a在stm32f4xx_pwr.c 和stm32f4xx_pwr.h 文件中。* |( T+ S2 [8 u5 l0 t, P4 ^
" W# k# O7 v, ^! `02. 相关类型% j! ? |3 L g$ J
PWR_PVD_detection_level/ ]3 x/ H$ w& T9 P6 Z6 P
/ h3 {$ \% J) x- O4 K2 n' `/ [- \
- /** @defgroup PWR_PVD_detection_level 7 S) r, Z2 ]* e% Z7 b
- * @{. E& X8 ~3 ?* i( x+ _5 t
- */
# P8 W0 u( z0 {- |1 W - #define PWR_PVDLevel_0 PWR_CR_PLS_LEV0
# u% t$ \* u4 l2 o' H( y - #define PWR_PVDLevel_1 PWR_CR_PLS_LEV1 b& }- R# V/ O! z& Z; X5 ]0 j
- #define PWR_PVDLevel_2 PWR_CR_PLS_LEV2
- i- |& U% z, E1 i9 Q1 \! `2 P - #define PWR_PVDLevel_3 PWR_CR_PLS_LEV3
5 [- ]) O" g- [, w) \ - #define PWR_PVDLevel_4 PWR_CR_PLS_LEV49 \' J- D+ F' J1 M6 k* H; P4 c
- #define PWR_PVDLevel_5 PWR_CR_PLS_LEV5
7 s8 P- S1 E! {' \ - #define PWR_PVDLevel_6 PWR_CR_PLS_LEV6
7 `+ g6 o* x& Z; h, C7 m - #define PWR_PVDLevel_7 PWR_CR_PLS_LEV7
3 f, ]' j" ]1 M: \$ i* Q" B8 Y% a
* ~) U0 h- F! H; N. ?( @; x. ]- #define IS_PWR_PVD_LEVEL(LEVEL) (((LEVEL) == PWR_PVDLevel_0) || ((LEVEL) == PWR_PVDLevel_1)|| \) I5 f/ R7 |: ]9 T3 k$ G
- ((LEVEL) == PWR_PVDLevel_2) || ((LEVEL) == PWR_PVDLevel_3)|| \
' V5 q A3 h5 p0 V/ s4 { - ((LEVEL) == PWR_PVDLevel_4) || ((LEVEL) == PWR_PVDLevel_5)|| \
& l6 c% `/ a+ Z0 x- v - ((LEVEL) == PWR_PVDLevel_6) || ((LEVEL) == PWR_PVDLevel_7))
复制代码
( {. T9 n. {5 x: Z8 Y+ yPWR_Regulator_state_in_STOP_mode
2 |3 `% B, b! }" p( e( O3 I7 ]5 ]8 z! {+ y% I5 L2 b
- /** @defgroup PWR_Regulator_state_in_STOP_mode 2 A0 k0 u* A' {- _1 p
- * @{
. n$ [& @( q1 h5 d2 k& q - */
0 H0 \& m& G9 H S' D* n1 a - #define PWR_MainRegulator_ON ((uint32_t)0x00000000)' |# D1 M, A; W2 l
- #define PWR_LowPowerRegulator_ON PWR_CR_LPDS- X' ?+ z7 E* a7 f3 X
% o1 K6 l9 U' [& p7 [! G- /* --- PWR_Legacy ---*/
' J7 w* l# G/ i9 q( {0 v - #define PWR_Regulator_ON PWR_MainRegulator_ON
, m4 ?/ p8 S0 q- f1 v& a - #define PWR_Regulator_LowPower PWR_LowPowerRegulator_ON
) c+ K6 K/ q- Z: s# M t% @ - 8 r: ]5 B7 M" @: i% y
- #define IS_PWR_REGULATOR(REGULATOR) (((REGULATOR) == PWR_MainRegulator_ON) || \
: O" v+ D& b" }0 }* ~* [' H' O' H - ((REGULATOR) == PWR_LowPowerRegulator_ON))
复制代码 $ Z$ { }! M/ X4 y) e
PWR_Regulator_state_in_UnderDrive_mode
3 _& k- [& F5 o0 e7 Y
! z- x/ c5 G h- /** @defgroup PWR_Regulator_state_in_UnderDrive_mode 9 L( \% ~8 K- ~) j: v0 [- R0 g
- * @{
( L, n1 g7 @8 e w* O A" t- s; e - */
) r& m0 A" W4 A9 i5 i - #define PWR_MainRegulator_UnderDrive_ON PWR_CR_MRUDS
" V1 \' n/ I/ n% k! m - #define PWR_LowPowerRegulator_UnderDrive_ON ((uint32_t)(PWR_CR_LPDS | PWR_CR_LPUDS))
0 @/ n5 V* }7 @! v) [" f - # l7 o/ Q. @7 h, X7 [1 s- |) ]
- #define IS_PWR_REGULATOR_UNDERDRIVE(REGULATOR) (((REGULATOR) == PWR_MainRegulator_UnderDrive_ON) || \
# i% c* s1 z, a2 { - ((REGULATOR) == PWR_LowPowerRegulator_UnderDrive_ON))
复制代码
* r: l7 z7 f# Y/ @6 Q9 y1 F7 NPWR_STOP_mode_entry* i/ F+ M+ g; T: m8 w
: H$ M+ C' V; h3 Q
- /** @defgroup PWR_STOP_mode_entry 9 P6 r" m v9 N- `4 v
- * @{
3 g4 i, Z3 L' Z+ O6 V6 | - */4 A8 |) R4 T `. ~$ x# x: Y7 S
- #define PWR_STOPEntry_WFI ((uint8_t)0x01)4 d" d/ O8 h; q! t9 r! |
- #define PWR_STOPEntry_WFE ((uint8_t)0x02)
2 L' r8 ~; C' {/ i: V1 E# o - #define IS_PWR_STOP_ENTRY(ENTRY) (((ENTRY) == PWR_STOPEntry_WFI) || ((ENTRY) == PWR_STOPEntry_WFE))
复制代码 2 \& U/ s0 z0 R0 B' d' E! U% D* Y/ @
PWR_Regulator_Voltage_Scale6 h% x4 u' ?. ^' J
x; [* L/ @ P4 i" l7 s E5 \5 t+ S/ a- /** @defgroup PWR_Regulator_Voltage_Scale
$ Y# h9 I1 i4 u9 g* v7 y - * @{: C( C: s- g: s5 A3 T: ]) _
- */
, `$ g, C6 s/ V3 @+ E6 m - #define PWR_Regulator_Voltage_Scale1 ((uint32_t)0x0000C000)7 c/ U) j/ }2 G7 {$ y
- #define PWR_Regulator_Voltage_Scale2 ((uint32_t)0x00008000)( s1 T) s& @4 `0 r5 y4 }( Z& w+ c
- #define PWR_Regulator_Voltage_Scale3 ((uint32_t)0x00004000)
! x1 a% z: a7 v0 O - #define IS_PWR_REGULATOR_VOLTAGE(VOLTAGE) (((VOLTAGE) == PWR_Regulator_Voltage_Scale1) || \, y* N( ^& `6 o1 V8 w1 j8 @
- ((VOLTAGE) == PWR_Regulator_Voltage_Scale2) || \3 Q. Z: p! H+ p& I1 `4 h. ]
- ((VOLTAGE) == PWR_Regulator_Voltage_Scale3))
复制代码 4 L J9 @7 p" _' k. S& X
PWR_Flag/ v. ?0 a6 y* K- D. v: l
- r& A! R# m: e/ `; I; N5 s) R+ f- /** @defgroup PWR_Flag ' q2 A3 _& }) X) s2 c6 H
- * @{
8 I2 o# ^1 Y( l - */" H' m, e9 E3 J% R; [1 V
- #define PWR_FLAG_WU PWR_CSR_WUF2 W( p# c, D1 P. u, v/ O
- #define PWR_FLAG_SB PWR_CSR_SBF/ N9 b, [4 }' _0 Q! X4 U* g0 [
- #define PWR_FLAG_PVDO PWR_CSR_PVDO* u" p" b4 _2 F' f: _( O
- #define PWR_FLAG_BRR PWR_CSR_BRR
" g+ `/ X" w/ m - #define PWR_FLAG_VOSRDY PWR_CSR_VOSRDY
; o9 {. D5 ]% ~ - #define PWR_FLAG_ODRDY PWR_CSR_ODRDY
/ d/ W9 [0 p5 `( y - #define PWR_FLAG_ODSWRDY PWR_CSR_ODSWRDY
! J" A! M0 N! V! H' F A* [ - #define PWR_FLAG_UDRDY PWR_CSR_UDSWRDY( U7 f* I) l+ U7 ^
D6 C; a6 N- S* Q( b! A0 ?- /* --- FLAG Legacy ---*/
, R" i* s; X2 j8 J - #define PWR_FLAG_REGRDY PWR_FLAG_VOSRDY 5 N$ @$ O9 k3 K+ @5 Y, P
1 K+ R& Z% J' U% n2 |% Z4 ]- #define IS_PWR_GET_FLAG(FLAG) (((FLAG) == PWR_FLAG_WU) || ((FLAG) == PWR_FLAG_SB) || \
+ D5 O( S6 w' C# k# P - ((FLAG) == PWR_FLAG_PVDO) || ((FLAG) == PWR_FLAG_BRR) || \# {3 |7 t& n" ]0 y* p! ^
- ((FLAG) == PWR_FLAG_VOSRDY) || ((FLAG) == PWR_FLAG_ODRDY) || \
F: C- X( n# g, c. z1 j - ((FLAG) == PWR_FLAG_ODSWRDY) || ((FLAG) == PWR_FLAG_UDRDY))
& D6 j; _% s' H! H% V1 ] - : a4 {" j$ {8 |, I
' p5 {9 }- ]$ k# b- #define IS_PWR_CLEAR_FLAG(FLAG) (((FLAG) == PWR_FLAG_WU) || ((FLAG) == PWR_FLAG_SB) || \- i+ \: k3 Y! P- s
- ((FLAG) == PWR_FLAG_UDRDY))
复制代码 $ U. M( B2 U" a
03. 相关函数
8 {* u: j5 s! G( |3 @
! p F( p. ?* J( m" ^8 Z- /* Function used to set the PWR configuration to the default reset state ******/ 9 _9 e8 I! Y& Z' _9 h9 s/ x- P6 r! Y
- void PWR_DeInit(void);/ Y: S, f1 T I1 Q
- 3 J' U& ^7 o' L7 t0 h
- /* Backup Domain Access function **********************************************/
% V8 j" x. A( u- X7 K: V" s - void PWR_BackupAccessCmd(FunctionalState NewState);0 F- P+ z2 I% D* _
1 b7 [) y2 |5 q; ]' U- /* PVD configuration functions ************************************************/
$ T) W+ m# `* _5 o o3 }0 K* ^2 R - void PWR_PVDLevelConfig(uint32_t PWR_PVDLevel);
; P5 @7 A8 o! l1 R - void PWR_PVDCmd(FunctionalState NewState);
% K) B- e& y @5 }9 C: [2 n- j
2 O- L, N0 H, q2 ^# `- void PWR_WakeUpPinCmd(FunctionalState NewState);
+ s- b% |5 d1 u6 E6 Q# S3 i
8 l/ ]+ A, @& z5 f* v, \1 R- /* Main and Backup Regulators configuration functions *************************/
: \0 Q7 m, n! d+ @) e - void PWR_BackupRegulatorCmd(FunctionalState NewState);; O2 ^1 L, @3 H6 O+ x
- void PWR_MainRegulatorModeConfig(uint32_t PWR_Regulator_Voltage);
, K( Y3 M7 U: S; [4 a - void PWR_OverDriveCmd(FunctionalState NewState);
5 {7 Q5 A( a3 E* m) O/ U) \0 @1 t - void PWR_OverDriveSWCmd(FunctionalState NewState);
! P- s. U; D8 o, ?. g - void PWR_UnderDriveCmd(FunctionalState NewState);
& V5 c$ t& N/ r
8 Z: Y5 f. S- ^" G- /* FLASH Power Down configuration functions ***********************************/ 4 g; g. q9 x! ]* |1 i d
- void PWR_FlashPowerDownCmd(FunctionalState NewState);
' N6 T/ R! P- S0 N
! O/ Z: q5 b& J5 ^2 r) G' C( Z- /* Low Power modes configuration functions ************************************/
/ o1 m* `1 z- T0 p, m4 s* \- L - void PWR_EnterSTOPMode(uint32_t PWR_Regulator, uint8_t PWR_STOPEntry);4 m+ T5 A4 s5 E5 s3 M. {
- void PWR_EnterUnderDriveSTOPMode(uint32_t PWR_Regulator, uint8_t PWR_STOPEntry);
0 q- T( e, E* C2 |* r, W8 ? - void PWR_EnterSTANDBYMode(void);' b- R) u, J) F1 j8 g( U
- * x1 k9 T9 }+ V% A$ j# O+ M
- /* Flags management functions *************************************************/ ' Q, W1 ]7 {# P+ F, J' z+ G C
- FlagStatus PWR_GetFlagStatus(uint32_t PWR_FLAG);
. P( t: s( M0 A9 V+ w% y7 N - void PWR_ClearFlag(uint32_t PWR_FLAG);1 r0 {8 O$ d' d9 A, G+ y
" R8 B9 d' @! D# i) c p
复制代码 9 y! A! p3 d& l' W1 @4 \: c
04. 结构体封装3 I- e3 S3 R. ~8 ~
- /** % n) r& @: d; B% B* B; X+ U
- * @brief Power Control& m! U" G4 K/ @5 d6 ?* ]
- */
2 @7 ]3 ~; ^, y* Q% Q$ Q; Y/ t8 f - $ r, Z- {- E& b+ O$ }" p$ v
- typedef struct
3 X% Q% L4 n0 J# c - {
$ u6 c2 F4 l7 ?$ m5 Q4 S - __IO uint32_t CR; /*!< PWR power control register, Address offset: 0x00 */. i' y z9 \$ d$ L
- __IO uint32_t CSR; /*!< PWR power control/status register, Address offset: 0x04 */
8 Y6 e+ _8 U n - } PWR_TypeDef;
复制代码
3 ^1 @) W1 \- {8 ]# Z" A6 r |