01. 概述
! e$ [' R5 Z: K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。- M2 u1 k& y& D0 z3 T; w+ \. K' t
w, z4 b3 ?4 x7 V+ f3 [在stm32f4xx_pwr.c 和stm32f4xx_pwr.h 文件中。* V' b ]6 ^5 q! b0 `( i
; M/ U6 R: l, ]4 k02. 相关类型
# J8 l5 U1 b1 ]) ?* {PWR_PVD_detection_level
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- /** @defgroup PWR_PVD_detection_level 5 u, i8 x7 R/ ?( g% F2 J+ Z
- * @{3 H; @, ~! q0 G/ }/ j& |
- */
( Z& B/ O" D7 D0 O$ Z7 H - #define PWR_PVDLevel_0 PWR_CR_PLS_LEV0
4 i/ m0 f+ j7 i( k6 g! l- Y - #define PWR_PVDLevel_1 PWR_CR_PLS_LEV1% R$ v5 H4 r. w" t, I- }
- #define PWR_PVDLevel_2 PWR_CR_PLS_LEV2
3 o# M+ S# g0 ^7 d6 B# A( {1 M - #define PWR_PVDLevel_3 PWR_CR_PLS_LEV36 \, }; j' ?) B# r" P" M' H
- #define PWR_PVDLevel_4 PWR_CR_PLS_LEV4, a/ r6 [2 X1 `3 x
- #define PWR_PVDLevel_5 PWR_CR_PLS_LEV5
5 M4 x3 v& [0 p" L. z" V - #define PWR_PVDLevel_6 PWR_CR_PLS_LEV6# P0 A; _3 Q/ w, f( `
- #define PWR_PVDLevel_7 PWR_CR_PLS_LEV7+ g- F; J M* f* d7 `
- 4 O! P6 B: E) Y$ |5 ~ ^' l
- #define IS_PWR_PVD_LEVEL(LEVEL) (((LEVEL) == PWR_PVDLevel_0) || ((LEVEL) == PWR_PVDLevel_1)|| \
3 d& F. Z! G( L9 j- w" o0 Z - ((LEVEL) == PWR_PVDLevel_2) || ((LEVEL) == PWR_PVDLevel_3)|| \
8 E0 G, \! n* N5 J/ q - ((LEVEL) == PWR_PVDLevel_4) || ((LEVEL) == PWR_PVDLevel_5)|| \4 Q: m- v% q* W( F' l; g6 y
- ((LEVEL) == PWR_PVDLevel_6) || ((LEVEL) == PWR_PVDLevel_7))
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6 w& P! X6 R: e5 M) TPWR_Regulator_state_in_STOP_mode# Z* Y+ X) m) G) w! W" n
) D8 ?2 d- \: _2 a) t) a- /** @defgroup PWR_Regulator_state_in_STOP_mode
3 @- m6 a0 z4 V - * @{# P( M" |) S. ~. x5 i4 Z
- */
$ J& P& |% ?8 \# N) K - #define PWR_MainRegulator_ON ((uint32_t)0x00000000)% U2 G8 `0 d- k6 ~
- #define PWR_LowPowerRegulator_ON PWR_CR_LPDS+ Z$ P: l2 Y% d2 e
- 4 | l4 ?3 Y& W) F+ C T
- /* --- PWR_Legacy ---*/3 S6 v; E9 M; J) n2 Z. n
- #define PWR_Regulator_ON PWR_MainRegulator_ON
3 ]. P6 f& i" f: Q - #define PWR_Regulator_LowPower PWR_LowPowerRegulator_ON
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- #define IS_PWR_REGULATOR(REGULATOR) (((REGULATOR) == PWR_MainRegulator_ON) || \3 q5 Y+ @! y3 p, v: X0 n" D4 Q
- ((REGULATOR) == PWR_LowPowerRegulator_ON))
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) N9 C" Z p1 p1 |PWR_Regulator_state_in_UnderDrive_mode" ~: P3 Q; [& Q! H \
# r/ \6 h9 @* l- M/ P; E. k. A- /** @defgroup PWR_Regulator_state_in_UnderDrive_mode
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# \( O" H6 J) \. a, r - */
, g8 [: v) T8 H% { - #define PWR_MainRegulator_UnderDrive_ON PWR_CR_MRUDS
1 _# R3 |& A& k - #define PWR_LowPowerRegulator_UnderDrive_ON ((uint32_t)(PWR_CR_LPDS | PWR_CR_LPUDS))
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8 D6 a' e" R* V) [, U, m. v- #define IS_PWR_REGULATOR_UNDERDRIVE(REGULATOR) (((REGULATOR) == PWR_MainRegulator_UnderDrive_ON) || \/ p2 M! i) v" J
- ((REGULATOR) == PWR_LowPowerRegulator_UnderDrive_ON))
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PWR_STOP_mode_entry
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4 D2 ~- y0 |; p& l) g- /** @defgroup PWR_STOP_mode_entry
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- */
5 A% x3 M+ D" A8 E - #define PWR_STOPEntry_WFI ((uint8_t)0x01)
& \9 b0 H9 z+ ?; E5 m - #define PWR_STOPEntry_WFE ((uint8_t)0x02)
: \. B) z; E2 L. G! m2 Y8 l - #define IS_PWR_STOP_ENTRY(ENTRY) (((ENTRY) == PWR_STOPEntry_WFI) || ((ENTRY) == PWR_STOPEntry_WFE))
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# E2 x" ?2 H% E: ^7 I0 aPWR_Regulator_Voltage_Scale: Z; `5 Q, Q2 Q& e
, C0 P- f! R8 D* @9 I' d- /** @defgroup PWR_Regulator_Voltage_Scale ; z) z1 x! r% s4 P2 G! @
- * @{* L c3 m/ e6 s1 Z
- */
4 w! x @( J" X+ Q- N$ A' I - #define PWR_Regulator_Voltage_Scale1 ((uint32_t)0x0000C000)
) \/ V* u/ |: Q7 X/ N9 @! w# U - #define PWR_Regulator_Voltage_Scale2 ((uint32_t)0x00008000)
% s! ?* [9 K& a - #define PWR_Regulator_Voltage_Scale3 ((uint32_t)0x00004000)2 w: j1 {8 N; a. n& S X& x( s
- #define IS_PWR_REGULATOR_VOLTAGE(VOLTAGE) (((VOLTAGE) == PWR_Regulator_Voltage_Scale1) || \
: l# `" m* O8 d6 ]! z: u: f - ((VOLTAGE) == PWR_Regulator_Voltage_Scale2) || \% x- C( Q' e8 N0 n# p
- ((VOLTAGE) == PWR_Regulator_Voltage_Scale3))
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' M! Y8 z# P+ @# |PWR_Flag# f) V1 U C& y1 a# G/ i
7 C1 B9 r) V6 |; ]( }- /** @defgroup PWR_Flag * h9 _4 _! T8 v! B. D# O" }
- * @{
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- #define PWR_FLAG_WU PWR_CSR_WUF
L4 M2 _" A* \3 {3 w' H - #define PWR_FLAG_SB PWR_CSR_SBF
7 ~3 C" Y0 F1 H3 U& C. B/ V1 d - #define PWR_FLAG_PVDO PWR_CSR_PVDO
4 q$ y& ]* t$ C, W+ _! q3 W - #define PWR_FLAG_BRR PWR_CSR_BRR
8 h/ ]: H u1 S8 K0 d, z# P! T$ L - #define PWR_FLAG_VOSRDY PWR_CSR_VOSRDY
$ w" Y5 ~/ |, z' c, d0 e - #define PWR_FLAG_ODRDY PWR_CSR_ODRDY2 y, P N, W$ N/ m+ W: B9 W
- #define PWR_FLAG_ODSWRDY PWR_CSR_ODSWRDY+ F$ x' d6 z% s; ~
- #define PWR_FLAG_UDRDY PWR_CSR_UDSWRDY" `- B& ]7 R& H
- : x l) A6 \2 y _0 u5 I' V# N
- /* --- FLAG Legacy ---*/
6 t$ p' A. x4 N6 Y" J2 r5 ` - #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) || \
; Z& X* u) }! Z - ((FLAG) == PWR_FLAG_PVDO) || ((FLAG) == PWR_FLAG_BRR) || \
4 [2 Z% P0 g4 c! l! `. \ - ((FLAG) == PWR_FLAG_VOSRDY) || ((FLAG) == PWR_FLAG_ODRDY) || \
/ q7 D( j( f# t' ^$ M - ((FLAG) == PWR_FLAG_ODSWRDY) || ((FLAG) == PWR_FLAG_UDRDY))
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& V( B- Q' x n2 c6 ?7 C- #define IS_PWR_CLEAR_FLAG(FLAG) (((FLAG) == PWR_FLAG_WU) || ((FLAG) == PWR_FLAG_SB) || \0 {) W- K# M2 _* R3 o; r) ^8 z% E
- ((FLAG) == PWR_FLAG_UDRDY))
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) K G0 a! W9 ]* v* N! a9 H03. 相关函数
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9 b5 z5 Y0 }+ t4 L- /* Function used to set the PWR configuration to the default reset state ******/
* N5 ~. I! r3 B+ K/ ~3 o) W8 [ - void PWR_DeInit(void);7 v3 Y, g+ F& I7 J) L$ O5 S4 }( [5 A
9 o* T; |4 w5 f4 v- N2 ^4 a7 M- /* Backup Domain Access function **********************************************/
0 _8 o$ {- B3 n6 m& ~ - void PWR_BackupAccessCmd(FunctionalState NewState);% B# S( f% r. H: q. \
- 1 T6 e' {% w y: \
- /* PVD configuration functions ************************************************/
9 D; q; R9 c1 F G0 W* a) T4 P - void PWR_PVDLevelConfig(uint32_t PWR_PVDLevel);, |% f; }% k7 G2 R/ H3 v4 h
- void PWR_PVDCmd(FunctionalState NewState);8 [8 A, @3 N3 w1 s& q3 b* r! n
/ I6 j; F6 [) G# V& E; F1 z" ?8 e5 o m- void PWR_WakeUpPinCmd(FunctionalState NewState);
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- /* Main and Backup Regulators configuration functions *************************/ % |5 s% F4 ]: U1 q, j6 {% V
- void PWR_BackupRegulatorCmd(FunctionalState NewState);! ]4 S: d$ L( v0 ?8 [) Z+ {
- void PWR_MainRegulatorModeConfig(uint32_t PWR_Regulator_Voltage);2 H$ s, }/ z# V; {3 H: l( G
- void PWR_OverDriveCmd(FunctionalState NewState);
- x3 D: c" c2 s2 n V% z6 r - void PWR_OverDriveSWCmd(FunctionalState NewState);
7 G, |* o% R7 g' ^1 | - void PWR_UnderDriveCmd(FunctionalState NewState);3 \# y. r$ A: A
- % |4 Z, p, ^! n# |: T. l( m
- /* FLASH Power Down configuration functions ***********************************/
, \1 }5 `2 Z4 ]8 H$ t4 @+ d2 T - void PWR_FlashPowerDownCmd(FunctionalState NewState);
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- /* Low Power modes configuration functions ************************************/ % f' c4 r* u" g4 E
- void PWR_EnterSTOPMode(uint32_t PWR_Regulator, uint8_t PWR_STOPEntry);
. \. @' ^5 j; E! c - void PWR_EnterUnderDriveSTOPMode(uint32_t PWR_Regulator, uint8_t PWR_STOPEntry);6 F4 R! H$ C5 T. z' A
- void PWR_EnterSTANDBYMode(void);& V2 I% J; v' d' f, a
6 s5 x5 S9 h: Q& j% p6 G, Z- /* Flags management functions *************************************************/ 0 x! ^0 Z) J3 v' x; X* i1 W! v/ ]
- FlagStatus PWR_GetFlagStatus(uint32_t PWR_FLAG);
6 A4 h. O8 p Q4 \7 c - void PWR_ClearFlag(uint32_t PWR_FLAG);
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04. 结构体封装
- _2 O$ i! a8 c- /** 0 @3 J Q+ Z; o# W0 k1 w
- * @brief Power Control7 b; n0 V% C( R' j2 K+ ?
- */5 D9 Z6 O) L8 ]0 u
|2 G) u4 Y! W: ^8 T5 x6 l- typedef struct4 `5 X1 s. H/ U2 Z1 ^' D ^, Q
- {
! k% G! \) N, \ - __IO uint32_t CR; /*!< PWR power control register, Address offset: 0x00 */+ ~; q0 \3 B9 r
- __IO uint32_t CSR; /*!< PWR power control/status register, Address offset: 0x04 */8 H8 B! a$ V- [4 o8 }6 W1 [4 D8 O
- } PWR_TypeDef;
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