接上篇：STM32超低功耗平台上的RTOS应用--PDF课件 1 q3 n6 T1 h8 ^3 j9 E: N! D+ o 7 Y! ?, y, _' ]) Y4 w) t$ x ?. L# V/ e8 l- m% m$ V& @9 ^ b- X K9 d 3 f4 z8 E9 n. X4 {' S根据培训的视频讲解，继续学习FreeRTOS，编译成功后来简单分析一下工程和代码。 A) C2 f" {' \7 `) L! u' r (, 下载次数: 14) 上传 点击文件名下载附件 4 C6 I- d+ L( n0 F/ v* G; U 这里使用的工程师STM32L4HAL库自带的例程，实现了一个简单的FreeRTOS的低功耗功能。 " ] ~ q( F% G7 s; h2 M3 v4 S, X工程的主函数文件main.c内容如下，注释中做了简单的分析。0 }+ M" Z/ a; w /** ; D" f) b. w) d# Z ****************************************************************************** - L0 n* D- z/ \+ } * @file FreeRTOS\FreeRTOS_LowPower\Src\main.c ! O1 ~+ u9 x. c$ s8 E3 E. T * @author MCD Application Team0 S$ G3 z# @/ Y+ B * @brief Main program body ; u/ S* ?# B" n5 I: M( f( j ******************************************************************************/ {0 i4 d# Z7 ~' d" L( T% ] * @attention / }5 p) ^4 b' M' p6 ` * * n1 \( E* b& s: ? U& X * <h2><center>© Copyright (c) 2017 STMicroelectronics International N.V. ' |" }0 ^0 |" l" g) L5 ~9 W * All rights reserved.</center></h2> * ]) E X( u0 l) A' R *; f8 b: o: r; b" Q& u6 I" ? * Redistribution and use in source and binary forms, with or without 0 p9 q4 q& T9 a- k4 N5 l8 \ * modification, are permitted, provided that the following conditions are met:5 i7 R3 `6 c: P * / O9 @6 \) _: b9 Z * 1. Redistribution of source code must retain the above copyright notice, & c! v1 e- Z# K) j! g- I * this list of conditions and the following disclaimer. 5 O$ R7 H. v: u! E * 2. Redistributions in binary form must reproduce the above copyright notice,6 S( c4 w% |( m * this list of conditions and the following disclaimer in the documentation, A# w, h0 a z5 s2 v * and/or other materials provided with the distribution. ) ~, W% Z% N. { * 3. Neither the name of STMicroelectronics nor the names of other ' p/ p$ U3 w7 L: }$ R! H# k * contributors to this software may be used to endorse or promote products 7 `% K9 e, V( g3 E * derived from this software without specific written permission. 8 Q% e: B& B V0 r: [% f1 X r * 4. This software, including modifications and/or derivative works of this + _6 G$ b/ _- C" z' k! u. S: r * software, must execute solely and exclusively on microcontroller or - O9 V3 }" L* Y* B6 d+ H- x& ] * microprocessor devices manufactured by or for STMicroelectronics. ]" o% a: V! n$ F I * 5. Redistribution and use of this software other than as permitted under & M, l) n+ v4 Z! v; D1 N * this license is void and will automatically terminate your rights under 0 e( L+ o7 Z! D) e' Z5 } * this license. , q) u* o9 k3 e * . h8 G0 r" A! ~. u% y * THIS SOFTWARE IS PROVIDED BY STMICROELECTRONICS AND CONTRIBUTORS "AS IS" ) R) X h) }4 z& q! M * AND ANY EXPRESS, IMPLIED OR STATUTORY WARRANTIES, INCLUDING, BUT NOT , ^. t+ [. M; ^ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A 3 P0 C/ c& O5 o4 b# n" J0 t7 W2 w * PARTICULAR PURPOSE AND NON-INFRINGEMENT OF THIRD PARTY INTELLECTUAL PROPERTY ) t' J v, T9 [2 S * RIGHTS ARE DISCLAIMED TO THE FULLEST EXTENT PERMITTED BY LAW. IN NO EVENT / N- j! x3 m9 U% }4 O% Q% x; X * SHALL STMICROELECTRONICS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, ( c# k) s" j# G/ r& p3 A/ {: f * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT - E6 C6 f3 b1 f% e) i7 X% k6 l * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, * |1 r4 Y1 d0 C4 o * OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 5 D9 Q5 T# r. ?; S6 i0 e * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 9 j8 T1 c1 g% \7 { * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,. q' E" N W: V! A U& Y, P k * EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 1 s( Q/ b! |8 Y! t8 a$ G * & l4 I7 V4 @* E: P, i7 g: | ******************************************************************************& G, l$ Y, u1 F5 G */ - [8 e' k9 n! l( R h# j7 _) c: L1 m! Q$ c- q$ {2 \ /* Includes ------------------------------------------------------------------*/ 6 b/ J) |9 g8 P/ Q#include "main.h": Y) q* J( h$ b4 ?& q2 F& Y #include "cmsis_os.h"; `8 p, N- d r , |& H5 y* c& z7 \; f) p5 o /* Private typedef -----------------------------------------------------------*/" n$ {( _' \5 k6 L) r1 a( o$ T2 { /* Private define ------------------------------------------------------------*/( i4 {! m; X _ /* Private macro -------------------------------------------------------------*/ + J- R/ |3 ^, \. U1 S#define blckqSTACK_SIZE configMINIMAL_STACK_SIZE + }7 I% d) f( ?#define QUEUE_SIZE (uint32_t) 1 //消息队列大小' T- U1 G2 p' n9 ~% o6 _ /* Private variables ---------------------------------------------------------*/! W6 _- N' ]" h. p, e osMessageQId osQueue; //消息队列句柄7 P% ?& x; z1 O% d9 J) V ( q0 X+ @. ^* [' X# Q/ j$ W w. l /* The number of items the queue can hold. This is 1 as the Rx task will 0 I, v `+ l) b9 }7 Dremove items as they are added so the Tx task should always find the queue $ R0 e5 r" P" v5 X S# Aempty. */ 1 x B# H7 u% d: K$ ^+ E* h0 s( N#define QUEUE_LENGTH (1) //消息队列的长度2 G& M- T1 l: e4 { o7 c' b, }2 p1 t) }' N- z/* The rate at which the Tx task sends to the queue. */ , P: j: a8 @6 |: b1 ]1 {#define TX_DELAY (500) //发送消息队列任务的延时长度 ! f. w, y2 z+ h' H$ [/ A! a5 K* Q8 u$ ^( q0 O' @5 g /* The value that is sent from the Tx task to the Rx task on the queue. */0 _$ ?" O$ s# k #define QUEUED_VALUE (100) //发送消息队列的值 9 p! }5 \' _5 K$ i! }1 X% E' L9 Y* ^( m0 `8 j5 L /* The length of time the LED will remain on for. It is on just long enough / q3 N, o- c, i) Y6 gto be able to see with the human eye so as not to distort the power readings too 9 K- x" a8 ~4 G! Emuch. */ 5 w4 `- Z9 m; g0 K#define LED_TOGGLE_DELAY (20) //LED灯的翻转延时 $ A+ j, O, E! R% T1 ~/ k; v4 b//私有函数声明 - V6 [( N; c2 g- o+ ]/* Private function prototypes -----------------------------------------------*/ , o5 x" e; t( n% Qstatic void QueueReceiveThread(const void *argument); //队列接收线程 6 W: @- T" W @( tstatic void QueueSendThread(const void *argument); //队列发送线程 / S4 ]) [- b; ?7 r3 ]static void GPIO_ConfigAN(void); //GPIO配置* l# D, @- k% P* S+ t5 s void SystemClock_Config(void); //系统时钟配置0 c! U% {! F' G" l8 _ 1 p9 Y7 s1 Q8 V. N; Z% T/* Private functions ---------------------------------------------------------*/ ; `. f @+ N/ i' }* {* D$ Y& D& |1 }) s6 E+ P1 b /** : A- v- L3 H3 l+ s * @brief Main program. 5 t7 |6 H, @; [: _0 ~" L * @param None* z+ E: v9 @, G- x5 z- R * @retval None ! E( r3 B7 d/ F* U* t */' w0 n$ r9 r% X; o# N& v7 T int main(void) //主函数 1 h# d2 A8 p& M# |{- ^& _2 R! ?$ j N /* STM32L4xx HAL library initialization:6 {$ X5 | m$ M/ i/ ? - Configure the Flash prefetch # b# y; i/ s/ K- M - Systick timer is configured by default as source of time base, but user ( ~% @1 \8 |6 y5 e: Q$ T can eventually implement his proper time base source (a general purpose " E. y& A& X: O( N Z* \7 S timer for example or other time source), keeping in mind that Time base / y: b1 ~3 G9 i6 t0 _/ p duration should be kept 1ms since PPP_TIMEOUT_VALUEs are defined and 7 `( _- v. j H; M8 Q9 G handled in milliseconds basis.% |6 m8 m3 q' X: T+ m5 k - Set NVIC Group Priority to 42 R# G( h' D1 w! X9 l# ? - Low Level Initialization4 t x3 @8 U: w */' ]# F% P; R& a8 a HAL_Init(); //初始化HAL库* R! U8 O* L' a7 L1 A : Y) T- ]# |% H5 v. Q( i /* Configure the System clock to 80 MHz */ 4 d6 D8 P. S. G' ^* [. \4 @ SystemClock_Config(); //系统时钟配置 6 ]3 w9 ^3 C+ C: c' a$ H" G# A4 N+ v: B% m /* Configure GPIO's to AN to reduce power consumption */7 M9 [" m1 e# H% U( K+ B5 Q' W GPIO_ConfigAN(); //配置GPIO到模拟模式以降低功耗 1 \0 c7 b4 ^) R8 k5 C9 Q- [: @ d: K /* Initialize LED */ : b d5 E9 | F- D5 d BSP_LED_Init(LED1);//初始化开发板的LED1 ' D/ g2 ]! Z2 g, x! |2 s ; M2 m8 x6 b( M& O7 I. h: Q4 C /* Create the queue used by the two threads */ 5 `8 d3 e& T- _, f! W% r osMessageQDef(osqueue, QUEUE_LENGTH, uint16_t); 8 G( [( ]- v! I R0 ? osQueue = osMessageCreate(osMessageQ(osqueue), NULL);//创建队列 ( \- I B g+ A2 g7 I1 h* @+ R 0 r& q1 I+ H6 w4 R3 P8 L4 ]* I1 O /* Note the Tx has a lower priority than the Rx when the threads are : g0 t. x8 S, w! v4 I" d( O. ~' p Q spawned. */) a9 P2 P% B9 u/ M, o8 D% J0 Y- S: S osThreadDef(RxThread, QueueReceiveThread, osPriorityNormal, 0, configMINIMAL_STACK_SIZE);( o' b$ q7 ~1 o' U3 ]& V osThreadCreate(osThread(RxThread), NULL); //创建接收队列线程(任务)5 }' |. y0 u2 v& ] , S# j) ]. e( R3 Z+ @ osThreadDef(TxThread, QueueSendThread, osPriorityBelowNormal, 0, configMINIMAL_STACK_SIZE); 0 ~/ W- _$ g4 w, d3 L osThreadCreate(osThread(TxThread), NULL); //创建发送队列线程(任务) & j ^1 r4 d) W. T; f7 f4 O; y C8 u /* Start scheduler */3 F6 ^4 @* f/ ] osKernelStart(); //开启任务调取器 C. M' Y' A' ]. W0 h 5 ]0 T) A# O" Y, Y /* We should never get here as control is now taken by the scheduler */# R8 d. r3 X3 i/ L( ~* [+ e p# ] for (;;);% Z+ M. L, V: s# u6 B5 t- ]5 K 7 t. O) i! ?* I0 U' _}# h0 Q+ A6 h4 |3 f) g - i8 k# ?3 \! c% }. z, Z /**7 J7 b1 ` v6 X H * @brief Message Queue Producer Thread. 0 g' L, Y: Y0 g * @param argument: Not used ; g: b- ^ g! L: k0 T+ p * @retval None6 |9 m4 ~. x# w$ w% x *// r: x% ]( `' y5 j) ]3 P* C static void QueueSendThread(const void *argument) //发送消息队列线程 + u' u9 t+ y! n ?- A" ?, s4 j{ ; m' f$ d2 x% F ` for (;;) 7 _8 d& t# C5 d( k9 _ { " {- ^4 G( O, @* d# Y /* Place this thread into the blocked state until it is time to run again.7 `/ n+ o8 P; M The kernel will place the MCU into the Retention low power sleep state . q+ I0 H$ S3 H7 o& A9 G when the idle thread next runs. */" m! _& k9 y. n osDelay(TX_DELAY); //延时 ; H, }( F" P( [6 v. H0 F+ V% g /* Send to the queue - causing the queue receive thread to flash its LED.2 Q" u5 i# J6 r; ?. H It should not be necessary to block on the queue send because the Rx $ m8 }5 t7 ^* }1 q thread will already have removed the last queued item. */8 Q: w1 x% C% v& z7 I6 M2 I osMessagePut(osQueue, (uint32_t)QUEUED_VALUE, 0); //发送消息队列0 D% Y. L) S/ e( ^5 h0 {" f- u: s } 1 T) f, v0 Y" e( `" {2 v7 O}! g/ ]3 ~ @! z, q5 R9 ^ ; K# U( @; S1 o$ f4 ~/** 6 \' v! \1 B& @ * @brief Message Queue Consumer Thread.7 m1 k9 D; i7 u5 k * @param argument: Not used8 {4 b# c `+ V6 v * @retval None 6 }7 L1 G: J' q" D4 W$ L */ % h* |" S; r) Astatic void QueueReceiveThread(const void *argument) //接收消息队列线程# K4 f# h: x- L {5 C+ x1 D* G' _ M2 K/ b7 N osEvent event; 5 E. L! N) v: A3 \* Q8 } * h4 [3 o( }& A4 g; V: b6 w for (;;)) R2 O, E t! D6 s2 G { ( P6 ^$ o& s: U /* Wait until something arrives in the queue. */ ' a7 V" s7 q5 l8 V; [# Z event = osMessageGet(osQueue, osWaitForever); //获取消息队列，死等! @2 @/ i, U" C' g 8 ^, x2 S3 A) ~& r3 m /* To get here something must have arrived, but is it the expected4 v% J+ k; Y1 L: [- M% y value? If it is, turn the LED on for a short while. */+ p3 B5 _9 k) u: z6 e( V# n if (event.status == osEventMessage)0 W1 T+ S0 ?/ ^6 y( o' ?; h {& W' R% s& E3 t! `2 g if (event.value.v == QUEUED_VALUE) //如果获得消息队列，并且消息值正确 & T" V- h9 d/ r. @/ `" L { * S5 ] J. g! M# Y4 O BSP_LED_On(LED1);; h$ V# @( W3 F |3 b) N/ e, y osDelay(LED_TOGGLE_DELAY); //闪烁LED17 a: j+ [4 \! F& l$ Y: a4 r BSP_LED_Off(LED1);) h! D) O M. T9 R, @& p4 ` }" D+ j1 C% h( K' |3 g }! x: K! h B3 @( s/ t! i+ I }2 C: I9 m2 R8 R6 U! D3 Y# H" Y } - f* J$ u9 n/ Z+ W1 e: J; q$ ]% N /**( H7 {8 R" B' ]4 P) M8 g * @brief Pre Sleep Processing$ ^/ j7 A" T* d* i" n8 `# o * @param ulExpectedIdleTime: Expected time in idle state # q# G' T2 J+ `6 [5 v! {0 U$ V: g* [ * @retval None* H4 x' \ E& z* L */ 9 v2 q2 e4 O6 g; L9 `* E( Y7 L* Lvoid PreSleepProcessing(uint32_t * ulExpectedIdleTime) //进入睡眠模式前的处理函数* e$ T: w8 F8 E; m {9 U {4 W2 T9 v& r* g /* Called by the kernel before it places the MCU into a sleep mode because 7 m" g) X4 g$ `* C* V configPRE_SLEEP_PROCESSING() is #defined to PreSleepProcessing().$ j* v+ R4 ? g9 p3 { $ Y; h% M$ m9 L+ J6 F4 E. \ NOTE: Additional actions can be taken here to get the power consumption c- Z! j1 X, B even lower. For example, peripherals can be turned off here, and then back" t& y3 I! `& k) K; W# ^ on again in the post sleep processing function. For maximum power saving4 B5 o6 F( }4 m2 x ensure all unused pins are in their lowest power state. */4 K* t4 [9 y; |% Z 7 e) A% P) }* f" ?$ _& Q1 d /* & T; B' a3 Y$ z* {0 F (*ulExpectedIdleTime) is set to 0 to indicate that PreSleepProcessing contains " o/ g1 F0 A5 }! R/ r4 j its own wait for interrupt or wait for event instruction and so the kernel vPortSuppressTicksAndSleep 9 L( ~; g" D( }+ l2 x; n7 X% y function does not need to execute the wfi instruction : d: n4 J6 @( }' k9 q; c& C */ : q; s1 q/ [- T! h+ q7 q6 I( {( } *ulExpectedIdleTime = 0;! a5 I- S% T; Z r R. E6 ~% ^8 { 4 d8 j7 _8 U/ r% r /*Enter to sleep Mode using the HAL function HAL_PWR_EnterSLEEPMode with WFI instruction*/! @# S- g/ i1 c HAL_PWR_EnterSLEEPMode(PWR_MAINREGULATOR_ON, PWR_SLEEPENTRY_WFI); //调用HAL库函数进入睡眠模式 - t. H7 {8 f* D4 t} , \1 l! [' j& v0 ]! O L9 m7 b- {+ g/ G5 p/** ' F. }% e% S% W8 v) Y * @brief Post Sleep Processing/ W. l6 J5 X0 Y * @param ulExpectedIdleTime: Not used * U Z4 x' T1 d- F! Y7 P5 t0 E * @retval None & N. p; H/ f S$ g+ v* v, h */& ]; H4 o, R2 ?& m, _, M void PostSleepProcessing(uint32_t * ulExpectedIdleTime)//睡眠模式唤醒后处理函数! w; L" i* A1 D/ Q7 Q1 _ { 7 v4 w% D8 k' { /* Called by the kernel when the MCU exits a sleep mode because8 o/ w9 G1 J" }4 |! A, R3 A configPOST_SLEEP_PROCESSING is #defined to PostSleepProcessing(). */ . X! ^! b, Q( Q8 M1 _ 6 s( T3 ~/ v4 `- Y, [6 J/ F /* Avoid compiler warnings about the unused parameter. */ 8 {- z6 t a2 V, x1 c0 Q5 w (void) ulExpectedIdleTime;$ o+ L, {/ e1 k3 j8 x$ ]7 c }: k# Y* C# W! S6 w. i # W3 [2 J3 X/ e4 u5 T+ W /**3 F7 z% C8 R% F5 B0 y * @brief Configure all GPIO's to AN to reduce the power consumption/ p% D( n" t5 G& ]: }' {# _ * @param None # c: \) m9 x* b0 d * @retval None/ ~# H( n0 N+ Q- U; A */* A1 j Z2 M" z6 R5 z static void GPIO_ConfigAN(void) 2 {' w& R1 H2 k{. B- E) Z9 F* ]+ Z' Z; p- S GPIO_InitTypeDef GPIO_InitStruct;$ O. K4 q/ o( M; s8 G - S0 X, r& X3 M4 x! X2 C# a9 E" s /* Configure all GPIO as analog to reduce current consumption on non used IOs */) R. p7 R( u7 u0 E( ] /* Enable GPIOs clock */ 2 }7 n' B) f* H- P, B- N- l __HAL_RCC_GPIOA_CLK_ENABLE(); 8 g1 @% K/ x7 _3 x# t __HAL_RCC_GPIOB_CLK_ENABLE(); ; \* H' X6 D6 f5 j$ j __HAL_RCC_GPIOC_CLK_ENABLE();0 U, }" u; s8 O+ m- }, Y __HAL_RCC_GPIOD_CLK_ENABLE(); : Q( @% i9 L! N* o7 C6 \ __HAL_RCC_GPIOE_CLK_ENABLE(); # w, C0 ~* A3 Y/ Y __HAL_RCC_GPIOF_CLK_ENABLE();, K+ E c" S n4 r, {9 m __HAL_RCC_GPIOG_CLK_ENABLE(); , `% N" Z, F$ C5 o b) W5 X( ?7 W __HAL_RCC_GPIOH_CLK_ENABLE();& F& P; @: p4 \ N3 e- @; G __HAL_RCC_GPIOI_CLK_ENABLE();: r/ S) c5 K3 m+ l , W* Z5 K/ Z/ Z9 W GPIO_InitStruct.Mode = GPIO_MODE_ANALOG; ( e* r1 V% s$ m* b GPIO_InitStruct.Pull = GPIO_NOPULL; 9 g2 M6 p }' ^# R9 x GPIO_InitStruct.Pin = GPIO_PIN_All; ) j) _% e- p' L; O7 x2 s. U3 Z- M, L HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);. W6 p& k: Q* i+ n T HAL_GPIO_Init(GPIOB, &GPIO_InitStruct); & P; S3 K% \" {3 N HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);+ x( q" Q9 q& b4 V: Y) K! r+ N0 R HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);: W1 H5 s4 Y' l& s) l HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);4 v3 Z% H4 p V HAL_GPIO_Init(GPIOF, &GPIO_InitStruct); E+ F7 k. Y! C1 X5 i- Y HAL_GPIO_Init(GPIOG, &GPIO_InitStruct); # U$ J! X/ O/ ~; r; O HAL_GPIO_Init(GPIOH, &GPIO_InitStruct);- u0 T2 x m% u HAL_GPIO_Init(GPIOI, &GPIO_InitStruct);7 C/ |# T8 Y1 [ N5 t0 |, ] , w7 b( i/ V2 }3 o; S /* Disable GPIOs clock */ / L) @, I: H' S0 N) l7 j0 L6 C __HAL_RCC_GPIOA_CLK_DISABLE();5 U" o, X& c, P, h; \1 V' q __HAL_RCC_GPIOC_CLK_DISABLE(); 1 \& T" {% _6 H __HAL_RCC_GPIOC_CLK_DISABLE(); 0 b4 e& E) S$ h G; v! w __HAL_RCC_GPIOD_CLK_DISABLE();+ E1 {. a: Q, W( ~ __HAL_RCC_GPIOE_CLK_DISABLE(); 9 P8 ]5 R2 c4 o6 L* G. p __HAL_RCC_GPIOF_CLK_DISABLE();& {1 Y3 X" r. L/ F# X __HAL_RCC_GPIOG_CLK_DISABLE();1 v/ F% d( x% k4 c- } y __HAL_RCC_GPIOH_CLK_DISABLE(); b3 q* H( X4 I0 l' @, r' ^6 [* T __HAL_RCC_GPIOI_CLK_DISABLE();: r( i( e( I5 Q- C C( s } - U0 @6 x1 F" H* G9 T* v6 g" \. }( y+ r) O5 ^9 K: d& d /**1 N; l* w8 k# K/ E! j: \' `# y. c * @brief System Clock Configuration! X g q7 N% d: u j) H/ q * The system Clock is configured as follows : ! B. h8 E1 [1 F. f. M' Y/ Y * System Clock source = PLL (MSI)6 L! w0 ]7 g+ }2 q: x- A * SYSCLK(Hz) = 800000001 Z2 s1 D0 C& f( S8 {; Y% Z * HCLK(Hz) = 800000005 m* Q5 }( `8 d6 V# `9 Y * AHB Prescaler = 1 + m$ p8 I7 S1 }2 f, y2 N; A * APB1 Prescaler = 1% l& Y v; i' A2 c! H * APB2 Prescaler = 1 ) E" `( ?3 D; c * MSI Frequency(Hz) = 4000000 - h# ^! p. d6 a i1 ?" z * PLL_M = 10 N$ n h# P* T5 P% |4 X0 N, q( S * PLL_N = 405 e4 o. I. j0 E( x% G; L * PLL_R = 2) s4 z0 H; ?+ x, H" }5 [: p: Y7 } * PLL_P = 7& C9 D. l! z- D- I: W, y& c * PLL_Q = 4) d7 A1 s9 ]3 p6 n. R- M * Flash Latency(WS) = 4- u: U9 ]8 e: D; K8 r * @param None$ e& P4 e: y% D! ? * @retval None3 I @) p+ _2 C( [7 d4 }0 _/ E */8 ]7 z. w+ T3 M5 ~8 p void SystemClock_Config(void) 0 B, H' ]) ~+ W3 [% |% P{0 V; S! E" I% F4 c. D2 I RCC_ClkInitTypeDef RCC_ClkInitStruct = {0}; 2 K& \6 R4 I+ S# X* j* M9 J$ | RCC_OscInitTypeDef RCC_OscInitStruct = {0};+ C- y* B# B4 k2 r: f9 }: K 3 |: S! ^/ A+ x! N' f2 D: n/ k, x /* MSI is enabled after System reset, activate PLL with MSI as source */: d- J. w7 Q3 k& t) X RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;6 A4 c! h0 k1 D) w% x( P s RCC_OscInitStruct.MSIState = RCC_MSI_ON; 8 \5 s8 f% B4 Z. p RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6;" f4 s( S7 s$ J: I' p/ M! f RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;) ~6 D2 F# e0 H' O6 A' R RCC_OscInitStruct.PLL.PLLState = RCC_PLL_ON;$ P+ | X) n+ V1 F+ \ RCC_OscInitStruct.PLL.PLLSource = RCC_PLLSOURCE_MSI; 5 `) f$ M) K) v+ T( ^5 f( @0 B RCC_OscInitStruct.PLL.PLLM = 1;7 S; k! D% Z s4 }; X+ D/ t RCC_OscInitStruct.PLL.PLLN = 40;% N3 t# \/ T/ T9 `7 t RCC_OscInitStruct.PLL.PLLR = 2;0 w+ ]9 p9 Q3 `% E5 @: b3 o) k' {" b RCC_OscInitStruct.PLL.PLLP = 7;8 Y6 c" Y( y7 Y$ } e5 Q RCC_OscInitStruct.PLL.PLLQ = 4; ( U: o7 V% Q3 Z! n if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK), S4 s+ M d' q$ Z" t9 k# U( I( a {" X! x. {8 M9 K1 [; L; s: s4 w /* Initialization Error */ 6 b7 v$ P2 n) {4 z* O4 g while(1);# ]* t+ Q- D, |2 q3 e( }* a } - H# o- _5 T# S, u& R. q/ N x* U " C+ p7 [8 ?' n: [+ Z/ l /* Select PLL as system clock source and configure the HCLK, PCLK1 and PCLK2 : r" G N5 O; t* ^; J5 V clocks dividers */5 U, k6 L, \- h7 F9 w RCC_ClkInitStruct.ClockType = (RCC_CLOCKTYPE_SYSCLK | RCC_CLOCKTYPE_HCLK | RCC_CLOCKTYPE_PCLK1 | RCC_CLOCKTYPE_PCLK2);% ?# u, f2 b8 Z2 }8 ]5 b7 }5 F! J6 l RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_PLLCLK;0 h% R. M; l" y+ J# D' u RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;% m# |) T) S2 |* [6 k5 g RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; ( R% `+ |( D1 I3 { RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1; 9 v! m# e' T8 N# Q if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_4) != HAL_OK)' l( F- H5 m. Y6 r {9 ?' |9 V# Q9 ~' ^' f S /* Initialization Error */ 7 O/ o2 N3 ^1 H6 X6 G while(1); k$ H1 q! e, r- m* i, K9 }9 T3 u }6 `. Z& C8 g6 w+ C, Z& N( g }' d% F2 F& N! q; G0 H- A" \ " G" U' `$ z0 j9 S" s8 d7 s #ifdef USE_FULL_ASSERT5 a3 O }& n% F3 E5 ~" b2 m ; T4 W0 n0 ^% m! }/**9 y& W+ [. @4 z9 K * @brief Reports the name of the source file and the source line number9 h& ~2 S+ G* N * where the assert_param error has occurred./ Z6 ?% d+ q, Y' n * @param file: pointer to the source file name- w8 u6 e, C, ?$ p. O. R * @param line: assert_param error line source number 9 Q$ E; |/ @ q( u7 e1 q+ c" A * @retval None 5 F( J# x$ K& v# W: j+ h/ G% v. y */ / M6 L# [9 w! I, C6 u$ o1 Wvoid assert_failed(char *file, uint32_t line) 6 j+ f \/ u% |' W2 _{ - \( j1 v/ N" ]5 M& d /* User can add his own implementation to report the file name and line number,& D/ Q% F* D7 {1 k# k' T( b9 P( V ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */$ Q# ?" w$ @. o7 | - d4 a$ Z9 s4 c6 V: U /* Infinite loop */' V7 ?3 Q6 J7 U! p7 b5 h+ `9 X while (1)4 z* M, U5 D0 X& v& g8 h j {}- t! \' D" S( z1 K" Z/ j } - L/ T* G5 b/ b3 E5 q#endif : u8 q- _* L+ p: l8 \# v % F; _! [! ~, `0 K4 _/************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/) Y, }2 P, A9 o& ]# K 复制代码3 H/ J! V/ q8 o/ |. A, N . [- U2 s# O% J4 }) P1 N. g5 X; O (, 下载次数: 16) 上传 点击文件名下载附件 7 o j, ~. h/ J2 H& Z下载到STM32L469ZE Nucleo开发板后，就可以看到闪烁的LED灯了，证明FreeRTOS已经跑起来了。" T5 H/ B. t& x% R3 j
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