期待了好久,ST昨天(2017年5月16日)终于在西安举办了第一届线下培训,这次培训的主题是“STM32低功耗设计应用Workshop”。% j8 T4 D8 A# m( M% K: H" z, X: a
用ST的芯片已经有好几年的历史了,但是我之前一直用的是STM32F1和STM32F4,STM8S系列的产品,对于低功耗的产品之前还真没有怎么太多的接触,有幸能参与此次培训,感觉一整天收获颇丰,感觉花了一天时间把低功耗设计的一些大概的东西掌握了,这个学习效率还是蛮高的。所以将自己学习到的东西总结分享给大家,如果有理解不到位的地方,还望各位大神指点一二,以促进我们共同成长。0 X" X5 E0 X$ f+ q: n* t
全天培训是在咖啡厅进行的,课堂上时时飘来可口的饭香味,整体氛围很好。
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作为一个技术狗,我直接跳过ST关于产品线的介绍,直接杀入主题--基于STM32L476的低功耗设计,当然在这之前先介绍几个ST发布发布的非常好用的工具。
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/ \1 ^( l2 M1 h9 E" S+ i* ] 一、ST MCU Finder
- Y% z) i4 a! ^ 这个软件我最早是在苹果软件商店发现的,下载下来觉得挺好用,所以还推荐给我群里的人了,后来又发布了安卓版本和PC桌面版(包含WINDOWS\LINUX\MAC OS)作为一个ST的忠实粉丝,我也是第一时间下载使用并推荐给群里的人。也在摩尔吧开过一次直播,和大家探讨基于ST MCU Finder 和cube MX以及keil进行产品快捷开发的课题,链接为:https://www.moore8.com/courses/1444。当然,啰嗦了这么多,还是没有给大家说说这个软件是干嘛的,我直接上图
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上面的是图标,下面是软件打开后界面:; {* h/ C1 p# P' j; w9 A l
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0 }' r7 s$ D/ t q$ ~$ Y 这简直就是一个选型利器啊,我们可以根据自己的需求,选择合适的检索方式,然后可以快速找到适合自己的芯片了啦。找到芯片之后还可以快速下载数据手册和其他的文档。再也不用网上到处找文档了。' q. {$ F) u. E$ d) O( ~
% |% O, D% P; r* { 二、STM32CubeMX
% N+ g, |# q( |0 b" M1 K 这又是一件利器,它可以方便的查看芯片的IO管脚图,时钟树等,不只是可以看,而且可以配合,是一款很好的IO分配,时钟树配置软件,而且它可以进行电源功耗计算。其实最厉害的应该是代码自动生成。3 B- h; _6 j! j6 I0 E* F+ ^6 ]
# X3 G% D& g* A2 g: G. o, c+ v上面是STM32CubeMX的图标,下面是使用的详图:8 w3 H, _ X. p( P9 A
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以STM32L476 nucleo板子为例,创建一个项目1 ?! r- |+ r1 b2 p( ^& P# x4 s
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+ t: `/ _! o. r具体功能大家看图,下载软件使用一下就爽翻了,我就不详细描述了。: ^: O6 X7 d" H" g |3 r' n7 w
+ H* N# s0 S# e# R' y* ` 三:常用的网站及公众号:" N m- u% a8 s
STM32社区:https://www.stmcu.org.cn/( A; M0 u w9 j
STM32中文官网:http://www.stmcu.com.cn# g I- D( `7 K
STM32四轴飞行器教程:https://www.moore8.com/courses/course/13084 u$ X; ?2 I2 v
公众号:STM32单片机" A8 k& G& S$ X9 e* l
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4 f, @7 @) s% ?% `& m( ~& f 安利完上面两个软件,开始正式总结回忆低功耗课程的内容:$ j. D* {3 Y+ R6 o
1、在低功耗案例分享中学习到的东西有以下几点:, ^( }' j4 ^, o9 G% i, t' y
#、影响低功耗设计的几个因素:9 C( @+ Z1 {) }5 Y; N; R' |
*芯片的工艺和制程:不同的制程芯片内部晶体管的开关功耗不同,导致整个芯片功耗不同- _- _5 U! p' O6 y* X' S' F+ e
*晶体管数量不同:这个是显而易见的一个因素2 Q3 a" u0 F1 W1 Z, D
*模拟外设的使用:模拟外设相对耗电量比较大2 O+ E K% e4 _& l# O
*RAM与Falsh大小:不同的存储容量耗电也不一样,存储功耗近似和存储空间大小成正比( R6 l# `$ u# n7 T! ]5 v
*MCU供电特性:提供的电压越低,功耗也就越低,但是此时频率也越低,和电脑超频耗电量大一个道理. `; ^# ~# z/ n
*时钟频率:时钟频率越高,耗电量越大: ^! N: N% {! e7 ^' d
*工作模式:不同的工作模式耗电量不同,这个是显而易见的
5 x$ R: v5 o/ Q# T" j #、功耗分为静态功耗和动态功耗,动态功耗与电压、频率、负载等关系相关
' w2 k* U \' O2 R" _ #、L4系列独有的电压转换器,可调时钟源,SMPS等.2 F. S1 F, K$ ^( H: R' Q
#、外设和GPIO连接的时候,如果两端电压不一致,就会导致电流产生,从而消耗功耗,所以要仔细阅读外设手册并进行合理配置
$ S2 q3 @, p0 R #、IIC等外设的管脚必须外加强上拉,在进入低功耗之前把IIC的管脚设置为上拉输入模式& _' ` R0 Y1 b+ l9 I) X/ e2 g
#、中断标识未清除也可能导致功耗上升" Q! _' h: M N1 l4 s
#、虚焊等其他情况也可能导致功耗异常0 F, a8 `" t0 @0 [9 B
#、在数据传输未结束的时候,尽量不要切换到低功耗模式,可能会失败
0 }" g$ w$ ]: i+ x7 y7 x #、使用低功耗串口唤醒系统的时候,如果串口波特率太高可能导致前面的数据丢失
: z7 r- G$ P) z+ X" G# t" ? #、一些特殊场景可以考虑把代码优先级修改为速度优先,用空间换时间. \! z+ T7 p! j* F# K6 `
2、HandsOn环节的实验学习(具体实验安排我就不说了,请参考ppt):
) @- r) g* H/ j& S 代码如下:' {5 e3 B! [5 m! i2 h
- /* Includes ------------------------------------------------------------------*/
5 d1 K5 [8 N# b4 j. X: Z1 E - #include "main.h"# V* k0 L; C# p1 ?- h
- #include "stm32l4xx_hal.h"' V$ G8 N4 Z* e4 Z0 \5 J" u
6 }) p5 o. w- _$ U2 H1 w' j- /* USER CODE BEGIN Includes */ o1 @* c; R# x9 c
- #include <stdio.h>$ A [9 l" p# v' @" ~1 N6 |
- #include "string.h"
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$ ^- B' W) Z x% \0 |* T7 _, l- #ifdef __GNUC__
9 `; _6 V& h0 ^' y - /* With GCC, small printf (option LD Linker->Libraries->Small printf
- H0 |# O3 I$ ]- ?( t - set to 'Yes') calls __io_putchar() */
3 z ?; Q) y6 [2 G. M E# N - #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)* Z2 z( v* m8 ~2 l7 X$ E: x/ f1 S
- #else# B! _, R/ |* D, R% R2 @& |
- #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
$ p, M& g( n6 s- x% V, H - #endif /* __GNUC__ */
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- /* USER CODE END Includes */2 Z. R3 V# }- l: H+ D, F" I
- ; ?4 J6 g2 ^. o
- /* Private variables ---------------------------------------------------------*/+ x, V6 s8 ]- S3 I) o4 x; E
- UART_HandleTypeDef huart2;. Z1 j$ o6 X) G" M1 O
( N7 G$ X; ^4 X- /* USER CODE BEGIN PV */
( S7 p3 V$ s+ T7 N - /* Private variables ---------------------------------------------------------*/
$ S5 G+ x5 c c% L - __IO uint8_t ReceiveStatus = 0;( v2 f' l4 H9 ^, Q |
- __IO uint16_t RxCmdCounter = 0;2 ?2 L7 C+ Z6 X, r
- __IO uint8_t ReadyToReception = 0;
7 q- A7 g9 ~: q( p: n - __IO uint8_t CmdEnteredOk = 0;
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5 M8 y5 g" ? _7 j2 `6 R- #define LR_ASCII_VALUE ((uint8_t)0x0A), c1 U( g3 t( O) ~ T
- #define CR_ASCII_VALUE ((uint8_t)0x0D)
; \; S m0 r- [' E ^; G - #define RXCOMMANDSIZE 0x207 u s7 W8 [8 e- r3 z
- #define RXBUFFERSIZE 0x01% ], G. J$ u* d( K7 J9 T/ \+ g
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- char RxCommand[RXCOMMANDSIZE];
+ q' y& p1 w. h+ K - uint8_t RxBuffer[RXBUFFERSIZE] = {0}; //transmitting byte per byte
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# B5 X8 ^4 D6 m9 u- char temp; //initialisation character& d! I* \2 e' I* @: I" t- Q. A
- char * s;
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- /* USER CODE END PV */4 B; S+ v+ p( ~' Q1 O( a5 B
- " I, ~5 }) [3 R1 `& b( I! O& X
- /* Private function prototypes -----------------------------------------------*// W( P3 O0 u, N# s$ z1 V
- void SystemClock_Config(void);
6 u0 k4 G1 Z3 V- _* U - void Error_Handler(void);* U5 Y: ^# a" Z5 t& d! h8 V* }$ F$ ^
- static void MX_GPIO_Init(void);
( b( u. {; d$ B& J - static void MX_USART2_UART_Init(void);
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- /* USER CODE BEGIN PFP */
1 A; l% l( D% c. v, z. m - /* Private function prototypes -----------------------------------------------*/
: l$ m* ~/ E, @' K& ^; M - void DecodeReception(void);
; D+ J/ ^% \$ z - void LSE_OFF_Config(void);+ ?. b9 p V& z0 u
- extern void test_shutdown(void); 5 s$ K5 b# ?5 m- \
- extern void test_standby(void);
# S0 i) R6 h$ A; C$ O1 Q g' E6 L1 ~ - extern void test_lpsleep_2mhz(void);
; e* }: A# H' ~1 K8 Z6 |1 a - extern void test_stop2(void);3 z# d7 |. T' e4 }# o8 z7 \8 M8 O5 \
- /* USER CODE END PFP */% ^- p+ A# J$ W8 S a
- 9 P+ e, I/ n4 c0 I) O
- /* USER CODE BEGIN 0 */
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& K, o7 R9 H7 U. S- /* USER CODE END 0 *// S/ ]0 J: h2 |# [. i. G
9 z X3 A/ I0 Q! n+ F1 U- int main(void)
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- /* USER CODE BEGIN 1 */
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- /* USER CODE END 1 */
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- /* MCU Configuration----------------------------------------------------------*/
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0 [0 t& X: W+ z" j2 d0 a; v' b- /* Reset of all peripherals, Initializes the Flash interface and the Systick. */
1 ? \! w% ~% p$ N8 f - HAL_Init();& o$ _0 r% ~9 \/ z
- % U4 m. h5 W8 V- e: _: n
- /* Configure the system clock */
; z/ s. p/ Y7 _ - SystemClock_Config();; \4 _% M* j1 F* n
- ! j6 H# Y# l, M* c- Y) Q
- /* Initialize all configured peripherals */ }8 z& I: I& }, k
- MX_GPIO_Init();
! |0 W, \7 n9 g: K5 r5 u3 ] - MX_USART2_UART_Init();
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4 V6 r) Z7 W- R1 o# l+ ~' [, P- /* USER CODE BEGIN 2 */
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* X3 u- ~7 V" O' e; a$ y5 `- HAL_Delay(1000);//delay 1s. ?; C$ b# E. [
4 b" B' w" w* }! p) B9 W& n- /* Output a message on Hyperterminal using printf function */% I8 ]. P4 _# P- L4 S7 [2 o
- printf("\n\rREADY\n\r");
, E" u4 A- P/ ]2 x - printf("Please enter the test number according below options\n\r");8 c, h( d W% U" \3 Z; H e
- printf(" 0 (SHUTDOWN) \n\r");
" H1 J' X, x* G2 \! Q1 `% o8 ] - printf(" 1 (STANDBY) \n\r");7 Z S* ~& j, y" ?& @. ~
- printf(" 2 (STOP2) \n\r");
& R! f8 H: [& `7 i- v/ ^ - printf(" 3 (LPSLEEP 2MHz - FLASH OFF) \n\r");* P1 p% s) [9 b c5 d K
-
2 Z7 J" T" G/ l3 \2 y; K - printf(" --> \n\r");
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8 B% e4 D6 n; j4 N9 B, O( ~/ A) X - while (CmdEnteredOk != 0x1) {* i2 [3 y, ^! W* |; p
- ReceiveStatus = 0;
$ H% K2 q- S& b5 K0 a) ^ - while (ReceiveStatus != 0x1){; V; D% w" h7 @5 S, |9 F
- /* Start the USART2 Receive process to receive the RxBuffer */
: A/ `3 v. U% c% T- g7 P8 B' G - if(HAL_UART_Receive_IT(&huart2, RxBuffer, RXBUFFERSIZE) != HAL_OK)
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- Error_Handler();1 \! s9 \7 p0 c8 L3 x
- }$ T" f+ Q) L- t" Z& W6 [' x0 E
- while (!ReadyToReception);
3 ]+ k! T1 d1 Y" p - ReadyToReception = 0;
# k) C2 l: O/ G# O! n - DecodeReception();
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- CmdEnteredOk = 1;( T6 E8 |6 B3 }, `' @% q
- 5 B- Q- n* A8 {6 ]* M0 o u% J$ i
- s = RxCommand;; A' J l3 [9 [( n
- 5 {. X- Q" s' G! C- g
- // __EFF_NENW1NW2 __ATTRIBUTES int strcmp(const char *, const char *);
/ K% Q$ I: \0 T1 V3 {/ r - // strcmp(s, "x\r") ==0, input char is x\r, it is true4 t+ [: u6 P/ Q0 z% s' L' n9 ~, f
-
* u! g) w G v% n3 M, u9 d - // TODO 5: If receive char "0", enter into Shutdown mode
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-
; s( U# {$ `* v# x# m4 I - // TODO 6: If receive char "1", enter into Standby mode 3 A( R s4 s, B3 K/ u; K/ M" q
-
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: y6 k: o1 @. H' w) C! h$ R - // TODO 7: If receive char "2", enter into Stop2 mode' u9 k5 {' q9 |& I; X2 @
- ( d8 {1 K# I f* Z
-
- l3 W5 x4 u8 z - // TODO 8: If receive char "3", enter into Low Power Sleep
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-
3 i: `7 T+ i8 O5 H; C - else {6 r$ Z* s: L. z! {% H! o
- printf("Invalid test number.. Please enter again\n\r");
! l7 x$ g; C* Y) ?$ D1 H - CmdEnteredOk = 0;
" K7 ], a( @( r4 x0 z9 p7 l - /* Reset received test number array */" X' M4 ^1 I; ^' C7 U, @* P
- memset(RxCommand, 0, RXCOMMANDSIZE);
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- 7 d. c5 X, x9 f
- /* USER CODE END 2 */
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8 |. U/ [& @8 ^6 |) m8 N d- /* Infinite loop */
3 w* {% W5 j' _( J: G9 v! E - /* USER CODE BEGIN WHILE */ ?) p9 I: ]9 T" l
- while (1)
x3 }6 q! o: \8 I: ? - {$ k8 |% K3 o8 b; b1 x) x& t" |
- /* USER CODE END WHILE */, W/ _) [5 I6 R1 V& I2 T' {9 ]
- ' g: h" \" `" A H1 M2 i
- /* USER CODE BEGIN 3 */
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- }
1 J9 u" ^ Z0 O7 s5 E+ V K - /* USER CODE END 3 */' O/ Q, w& C! C2 D/ P( {
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- # P0 g. ^) C2 x9 ?. w
- /** System Clock Configuration
0 |0 ^2 o$ v* |& V* N - */
5 X2 ~& b, l8 W m7 p - void SystemClock_Config(void)4 p# O4 H; k7 k
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- ( p1 Y `0 V4 s8 R, [( T
- RCC_OscInitTypeDef RCC_OscInitStruct;
0 w+ D& z, t; x" T - RCC_ClkInitTypeDef RCC_ClkInitStruct;; ^+ X3 j/ W0 z1 ~
- RCC_PeriphCLKInitTypeDef PeriphClkInit;
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+ t8 `6 a8 C6 ^( J2 Z+ O) [( L- /**Initializes the CPU, AHB and APB busses clocks
& Y/ o6 j3 M- s - */+ P' ~4 ?! ~- _6 L' z
- RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;8 {# N, x! u% f0 B& [, p
- RCC_OscInitStruct.MSIState = RCC_MSI_ON;$ w$ }* O; o- z0 i% X
- RCC_OscInitStruct.MSICalibrationValue = 0;
. G- }4 h% Q' A. [ - RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6;; S5 A& b' z9 \) l! ^3 r$ T$ e
- RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
! S3 t4 b: E6 _4 U- ?" n - if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
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- Error_Handler();% f1 ~: Y/ c) G( \8 i9 {+ ~
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# [' g ~, Y0 Z; v$ ~; P2 J8 D- /**Initializes the CPU, AHB and APB busses clocks
. P" w. {* k# Q) H& D; E - */! r* ?6 D6 Q8 X& X0 A8 c
- RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
Q8 V. U9 [9 L - |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;! h" t, r+ g8 R$ ?: B
- RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
/ C" Q% `1 g% k4 [- l. p' G6 }, m - RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;/ k- E2 o6 f" P! T: m ~1 a
- RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
2 H9 i& X: |( b+ |: i - RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;% ~" I, v. Q+ v* z/ o5 r! g/ T
& r4 y6 r0 ]. i) B1 Z9 M4 v1 i- if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)5 E5 M, o7 ?: S. W
- {3 D! K! Z" A3 P( [( R
- Error_Handler();
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- PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2;+ ~9 W5 u4 P& b6 {9 s% K2 {8 J
- PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;5 u8 P( _8 M! ~, d: S K1 r
- if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
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' h# r) J0 a/ M8 h( o4 g6 X- M9 L - Error_Handler();; g7 Z+ h q7 B. P2 ^; s% a7 {. q5 {
- }
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9 W6 y4 ?) m; B- m0 W- /**Configure the main internal regulator output voltage
% O/ ^8 S% G* Q3 B4 B3 L4 n# P - */+ m. h) o) M$ P( t$ C, f) t; B
- if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK)/ p2 ]: S- v: Q2 H0 z9 c
- {
* u. i; B- [! Y: v! L - Error_Handler();
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& z; ~" u d4 r9 w0 w- /**Configure the Systick interrupt time
" Z* y. F5 g: X5 H; z - */
0 A" |) d7 t4 ^: J& p" ^ - HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
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( z2 W) f: E' v" `- /**Configure the Systick / [9 Y0 h& ~ }8 B/ }8 m
- */
2 m( d. ^" E, \3 l" a( A" t: _# [ - HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
2 ^( \' `& `1 }+ @
7 C6 u- \/ f$ a5 B- /* SysTick_IRQn interrupt configuration */) L8 V0 r+ n, V: _& d
- HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);% H. T. z v4 v
- }1 [. d# l9 v( F; w5 o
7 i/ H1 q( s" U6 G. B- D" b( |- /* USART2 init function */
$ `; ?, A1 O7 w0 E - static void MX_USART2_UART_Init(void)( v6 X8 E' q$ ]0 |& n
- {( ?) p k8 P V: }) D
- ; r' d( I1 Y' E
- huart2.Instance = USART2;
6 ` H3 k8 c' M' Z% i" a - huart2.Init.BaudRate = 9600;7 y: a \2 {5 N/ i! _; r
- huart2.Init.WordLength = UART_WORDLENGTH_8B;0 B" J3 L( D; S( q
- huart2.Init.StopBits = UART_STOPBITS_1;
7 A8 a, m) v. e' j - huart2.Init.Parity = UART_PARITY_NONE;: O# E% O$ I' T. q8 `
- huart2.Init.Mode = UART_MODE_TX_RX;
9 t- @5 u0 g# @+ F& _8 x - huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;
. l* O$ b% d9 O0 l7 H& I5 g8 | - huart2.Init.OverSampling = UART_OVERSAMPLING_16;; C2 P1 w0 p. @+ \# l. N+ h9 \8 N
- huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;& k5 ]# d) ]$ c ]1 \
- huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
; T- _3 K4 @& ` - if (HAL_UART_Init(&huart2) != HAL_OK)7 Q. h9 B( C( k+ x
- {
# G8 A9 h5 G: L1 r, e: a - Error_Handler();
2 c) Y, {! M( G9 A7 } - }% ?4 ^% x0 `6 }# F$ ?4 G
- . p* k% S* n3 s z7 N1 ~
- }
$ d7 h* S" t& n
+ N3 P& o" S2 [( F A+ l- /** Configure pins as
% l# I- J0 v" f - * Analog # G4 z$ U+ Q! w9 a
- * Input
! x) e3 V7 E% B3 ]8 x2 t: m - * Output# l7 @& d4 n* b. Q
- * EVENT_OUT
# p+ {! ]$ A1 l% ^$ z+ Z8 T4 S6 k - * EXTI
j5 \$ Y6 a3 C& e* ~0 @" H1 q: K# m - */# {5 E8 Y5 v4 O+ I2 s) h
- static void MX_GPIO_Init(void)( {% p% Z$ b! d4 Q/ s5 `; S+ B) X) g
- {
$ p8 B" P3 z- L8 \* \2 J - # K; |( z+ x9 {: L" ?
- GPIO_InitTypeDef GPIO_InitStruct;! e7 ^2 e) e2 f+ F, o
* h( {/ [8 k J( J9 X a, F6 c) x( D- /* GPIO Ports Clock Enable */7 f) ?5 t" e3 I9 w5 a
- __HAL_RCC_GPIOC_CLK_ENABLE();
5 C9 R7 O$ t: u& U - __HAL_RCC_GPIOH_CLK_ENABLE();& x+ N+ M6 a$ S$ x, p# `
- __HAL_RCC_GPIOA_CLK_ENABLE();
+ g: h: z) O9 ~: U* ?% [- y - __HAL_RCC_GPIOB_CLK_ENABLE();
' g C1 a, Z- k9 S u$ | - ; ^, t9 Q, n3 b( {2 Y2 _* U1 M
- /*Configure GPIO pin : PC13 */
; y+ }8 r, ]2 p F; h0 r1 y - GPIO_InitStruct.Pin = GPIO_PIN_13;; | ^2 W& t* @7 K7 w$ ~$ q
- GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;: o! Z l+ ^; {; J( v* k
- GPIO_InitStruct.Pull = GPIO_NOPULL;
5 O0 \: _" F3 u, ?! B. A/ g! k - HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);! r! l7 R5 V8 {' u5 g5 Y
- 6 B3 Y3 r* M! b6 @
- }- _2 z7 y# _ ^" b- P0 C O
- # L0 C' k# \' @" i! W% u
- /* USER CODE BEGIN 4 */
8 o: @' e" g4 @4 D - 0 T0 d* K* B% H9 n$ D" a
- PUTCHAR_PROTOTYPE
% F) D" M& f2 l. d8 l% S; H1 B2 d - {
* q, A5 T4 [( _6 t; P - /* Place your implementation of fputc here */6 Z: x4 t, K: t# \. ~+ @3 k" V1 |0 y
- /* e.g. write a character to the EVAL_COM1 and Loop until the end of transmission */
3 q# Z, ~9 `* p: Y, j/ ]. u - HAL_UART_Transmit(&huart2, (uint8_t *)&ch, 1, 0xFFFF);
; g/ ^7 L5 L6 m$ ^& A9 A3 H% j
- q, o( ~* ~6 U6 f; K" w7 l( L0 V0 L- return ch;, H5 `1 l( [6 n, L [8 D. n5 E
- }
2 `0 a9 z( J9 o2 s - : E. G# P' _. F4 [. }7 T! V
- void DecodeReception(void), ^% W/ ?, s4 v/ c* E& z) t
- {; ~! ? f. A, n. T
- /* Read one byte from the receive data register */
1 e" b3 J7 U5 L7 m - temp = (char) RxBuffer[0];( f) S5 P o, t7 ^
- RxCommand[RxCmdCounter++] = temp;
5 y: G1 S# ~0 v+ |( n6 {1 Q' q - # k! H2 ] s# C% T; y
- /* Check if is an LR/CR character */
; _) u( [% R6 w7 V* J" j2 u! Y - if ((temp == CR_ASCII_VALUE) || (temp == LR_ASCII_VALUE))+ X) C! u! [% b# l5 B1 N1 Q
- {- g6 `/ P E; C& G0 c* J+ T* G
- /* echo entered command on terminal */
+ Y3 u9 p" [( ]" o3 N; N9 u - printf("You entered below test number:\n\r");
* x: F, Q$ P" K8 H - printf(RxCommand);( C! F8 l8 Z! e5 m" L- C
- printf("\n\r");
3 }# r* u% U. I2 J8 k! P - / h# x/ I% M. I: @: a* F+ Q
- RxCmdCounter = 0;6 P% V9 i3 |- k7 l/ X
- ) b% g" p( y2 d# a5 K1 p, K
- ReceiveStatus = 1;7 O/ x7 m* ?1 \% |
- }& R) ^+ ]3 B1 A) A" J5 w9 m6 v9 [; E
- }. o, K/ W4 F! `- V) @
/ Z9 g1 m- T: Y" n. ~0 u& Y- void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
4 \2 l. {2 W# q, M4 I - {( d$ A* N: C! ?
- ReadyToReception = 1;
k" T) }- c5 E( A0 l! [ - }# @( ~ P1 s9 ^2 g9 F
- 6 |; k% G$ d# ^0 e+ M2 F
- void SystemClock_2MHz(void); L' \2 K! \# m# Z* f: ~$ @4 m
- {
1 j2 R9 G- k7 ~ - RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
7 X( D @, T, Q - RCC_OscInitTypeDef RCC_OscInitStruct = {0};6 t: L8 |& r# R( T! n, }0 W
- . m9 j: i1 M# U M3 R. V" f! B5 k% r
- /* MSI is enabled after System reset, update MSI to 2Mhz (RCC_MSIRANGE_5) */! P4 @# |5 s& |4 M/ M$ v. i) q
- RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;8 y; S! T4 o- Q
- RCC_OscInitStruct.MSIState = RCC_MSI_ON;
; m B1 U3 C% i* m - RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_5;
& @) g: E: P0 {/ M0 `, m: m' G$ r - RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;2 t3 R2 g4 B. S( n% w
- RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;4 H9 _ R) g' V$ Y+ A. i
- if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK), t% Z0 }/ e A3 o+ b7 r' u8 X
- {2 f$ m% Y2 D ~+ N
- /* Initialization Error */
: z1 S3 C ?, B0 E: W9 Z - Error_Handler();+ Q2 A7 U9 V+ [7 d# W
- }
8 T5 b" M% o& X" u- l7 ^, } -
; s# n2 I7 k7 x7 @ - /* Select MSI as system clock source and configure the HCLK, PCLK1 and PCLK2
. Z8 v* ~& r: k9 T - clocks dividers */
" X, l$ I9 F& a% G+ `' a" P8 @0 A - RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK;
1 D1 B; I# F, R& {9 [) T0 v - RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
6 o/ J$ r) e' f' m; W! Y - RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
+ y) m* _. X8 a0 Y( c7 J0 } - RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
$ w b) u5 _8 s* K" O - RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
. ^5 t; [2 w: A - if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK). H5 X) V! W9 c9 u$ Q& @1 y, [' n3 A# u
- {" E7 T( y7 H3 f3 D
- /* Initialization Error */4 h3 }4 o0 c1 l
- Error_Handler();
; U! B* J4 Z; J' [" Z, J8 e - }
0 n/ ^/ p: q7 [1 p8 V# ~ -
2 X. @7 N" J6 m& r - }
% s/ N9 r" U5 e( Q8 J3 S, x2 v - + t! N) y! }% V( V1 G; o; H& Z
- void GPIO_AnalogState_Config(void)" O9 i! [ s! F1 `1 R. ~" Q0 L
- {
' n6 o' }, i/ a/ ?9 e5 s - GPIO_InitTypeDef GPIO_InitStruct;
; e6 w! z: G; U, n: h - ( {" d7 `) o3 j; D; M5 O$ N
- /* Set all GPIO in analog state to reduce power consumption, */* l4 L u7 d; D; W( \
- 4 o" C* G+ R% ^
- __HAL_RCC_GPIOA_CLK_ENABLE();
3 k. F! W: ~5 Z0 f( B - __HAL_RCC_GPIOB_CLK_ENABLE();. ?& }& x2 T, b" H8 D( e) J
- __HAL_RCC_GPIOC_CLK_ENABLE();+ c9 Q5 E3 M) A/ X. j( R
- __HAL_RCC_GPIOD_CLK_ENABLE();/ z& Q8 \* e/ g- x1 p
- __HAL_RCC_GPIOE_CLK_ENABLE();
! k; N. X ~4 p+ { - __HAL_RCC_GPIOF_CLK_ENABLE();
" K) e! A# ^5 s% U, }& [3 v" | - __HAL_RCC_GPIOG_CLK_ENABLE();$ A0 B/ M: u" p }. [
- __HAL_RCC_GPIOH_CLK_ENABLE(); - S. E7 E3 W: T+ w
! b0 L/ g! x# w9 F2 P- E" R" R- GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;- p4 z f# j0 w6 D1 [8 b$ X9 S
- GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
9 ~% b9 w; M8 Y4 f+ P6 F3 A - GPIO_InitStruct.Pull = GPIO_NOPULL;
, z1 O- h! p; f4 n - GPIO_InitStruct.Pin = GPIO_PIN_All;9 @, Q% I& H- `. ]# \2 I
! \ O1 p: a5 [- Y v/ {/ V- HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);# d3 N0 S/ w* h% i" {
- HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
" `* j/ ~& h1 Q) ]* Q% E8 R1 o- s - HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);; L0 K' V4 Q. p, K- l- `
- HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);$ [. N( p" E% ]" V
- HAL_GPIO_Init(GPIOE, &GPIO_InitStruct); H% E! S8 g A# U& Y" D7 z! [
- HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);
) j5 l% S' w& [3 ^$ X - HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);+ D6 X3 X* E9 N; H! x7 h: r% v# A( h2 Q
- HAL_GPIO_Init(GPIOH, &GPIO_InitStruct); 3 }" m$ D6 k9 j8 }, j0 z* T: s$ W
- 0 `/ ^. U0 b2 X* c- M7 s
- __HAL_RCC_GPIOA_CLK_DISABLE();) u3 Z3 C0 ^% M e0 M
- __HAL_RCC_GPIOB_CLK_DISABLE();1 t. ]9 ]2 K" D' o* N" @, E) U
- __HAL_RCC_GPIOC_CLK_DISABLE();
! F' r; E( J% E: a6 ]) r - __HAL_RCC_GPIOD_CLK_DISABLE(); i1 _1 y( ^2 u. {
- __HAL_RCC_GPIOE_CLK_DISABLE();
, I! p+ N8 ?1 d$ ~- O1 ^8 O - __HAL_RCC_GPIOF_CLK_DISABLE();. C+ c/ z6 v v& X2 _
- __HAL_RCC_GPIOG_CLK_DISABLE();
. \) P7 z, x- m9 p+ R5 D% _ - __HAL_RCC_GPIOH_CLK_DISABLE();4 R' e$ T! ^9 x" ^) t+ c$ I
$ X6 n) [! I: }% C0 s- }+ ~5 j. E0 H' U' n- g- J' x, J' h
3 v) J$ J. ^% Y. w% r- void LSE_OFF_Config(void)
' ]4 h1 F! ]9 P; }+ E - {+ P5 @ z& [. J. U, L! u% T* f
- RCC_OscInitTypeDef RCC_OscInitStruct = {0};+ M$ h, ~7 D2 K! n# m7 \1 b
- e3 K/ V, Q, V+ S1 L; N* j; X1 d
- /* set LSE OFF */& y# e. S$ ]9 Q3 w' q5 ]
- RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
E* \$ `: o: e% i. k' k - RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
$ a+ m* h: V, v8 t, D) G' O - if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
, {+ f* _5 j3 j/ ]$ H9 ^& R - {( F% M1 _; W, A% J1 `
- /* Initialization Error */- O/ Y2 `4 C- W% f) x
- Error_Handler();
7 S1 t1 [: K0 E; {, r% K - }
) ^' k0 W6 L# F1 d! e, w2 v& O/ X - ' F) `9 w5 r: |
- }- o- e# _" g+ ~6 _3 }
- $ d- f! O5 G: ]& |& x
( V* O$ H7 O6 ~# c8 z8 E- // TODO 1: Enter into Shutdown mode
" g# U- ?' Y# l- [ - ) ^' l4 Y" Y h* O: ?4 a
5 \5 s' T% }$ ~$ d- // TODO 2: Enter into Standby mode
4 ~9 ?2 ]) v: p1 C) B# N2 ^
$ r$ k& A0 H( z. [' o2 u' u- ; B, v& r( l7 f* u- a% H( F
- // TODO 3: Enter into Stop2 mode
+ A0 I3 s( K0 D! a( s5 M
6 F7 o# J2 A1 u) p- ^( a
0 [& r( O8 k' f+ ?- // TODO 4: Enter into Low Power Sleep mode
9 T) P ~3 M/ _
" \! }& H% s4 v) O2 C/ Q5 b# |' j& T- 2 w+ U3 Z0 m4 T6 U% m. O" W
$ N! i+ L' j* S6 [% K- /* USER CODE END 4 */4 M" p4 I: `' N
- + @6 I0 G; T/ C) R0 y/ J6 I7 b
- /**# W1 M! w7 y$ Q, L
- * @brief This function is executed in case of error occurrence.
' G I- s" l+ o( i) g - * @param None
) k4 K; c, ]; \& V; e1 p( b9 i - * @retval None) d5 {8 V, d! f4 @# V+ z2 o8 p4 {
- */
' P5 f" }. a; g9 s - void Error_Handler(void)
8 N1 @4 i1 h; H& O2 T; f - {& k; U$ y/ }2 c% z: t. E
- /* USER CODE BEGIN Error_Handler */2 v6 r5 B! ? A& F
- /* User can add his own implementation to report the HAL error return state */
& r% `! G9 B& M* G8 n - while(1)
4 S A3 z) t7 t - {7 O) d' Q( `/ V& r8 r* M
- }
7 P5 `: f2 d$ p - /* USER CODE END Error_Handler */
9 D6 ~% S. E& `1 {5 N - }
# E/ S/ _* {; n$ O; N' c. M
2 i- Y ]0 f `" K- r) R- #ifdef USE_FULL_ASSERT
( ^3 P; P; J$ q# H: G - # O% T' w6 W! q% e1 m
- /**
0 y/ X! f# j- ]) Z' D" c/ K3 a E - * @brief Reports the name of the source file and the source line number
% ]6 x2 o/ P& j - * where the assert_param error has occurred.
9 A9 l! V9 g8 d3 i" U; m - * @param file: pointer to the source file name$ r. h( v9 Z6 _7 ~. g8 A* B) A
- * @param line: assert_param error line source number3 U" b& u/ c# f: P- N
- * @retval None9 r& S! `2 Q4 U4 S! D. |
- */
3 U' ^* l% j" F; j$ u9 H - void assert_failed(uint8_t* file, uint32_t line)
0 A0 I! L X0 l9 ]5 w) D( j - {
: f0 K& \6 Q, l" j- g+ t - /* USER CODE BEGIN 6 */4 k/ [5 \/ ?+ y$ w+ T2 @
- /* User can add his own implementation to report the file name and line number,1 P; H0 a, ~- F7 g; l" H+ ?8 T
- ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
$ x; P: x7 E& G) W/ R - /* USER CODE END 6 */1 o2 ~5 f% [% _& l! z* |" i
$ |; B! `6 a' e9 ?1 U9 n5 c- }' f6 f# C% _4 B- K7 ~5 F8 }
: i0 {( [7 Q9 y- #endif$ V L3 f, ]9 n5 X$ G& Z3 y
) F3 T$ b, V n/ {7 o8 ~- /**. q! w! u) n* W, ~& _( w; p
- * @}9 P' x" @" l4 N6 b4 g" m0 n+ q; }
- */
4 H U0 y2 ~2 w" ]9 u - ) v- |1 o ?) D1 G* E
- /**# M+ d: U8 q# s+ S* u7 N: {
- * @}
# t; J# i t7 \! | - */
}: \( ~. H; A$ M& y- n S - & j8 h* v( g% E/ v" J$ b5 U9 m0 t" d
- /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
4 c- @: r. O4 I) t. N
复制代码 上面是修改之前的代码。
1 X, X' |% v1 E$ l R( E' W我自己测试的结果是(图上红色的数字是我的测试结果,与理论值基本吻合):3 r4 o I7 }: u8 [7 c/ S! E5 x
2 {) i4 J2 @1 m9 J: _: X2 d
; v$ f; R3 b' F4 M- L4 O4 Y& N. m大家也可以根据帖子里共享的ppt思考一下补全代码。: K' i) |) H+ T% J! v) `
& m7 m3 j; T. }5 G7 _6 `
总之昨天学到了以下东西:1 e3 V8 D. V$ W$ c( X3 I
1、知道了设计低功耗产品时,硬件层面和软件层面各应该注意什么
/ @0 z% R6 H) V c& L& u2、能够使用CUBE MX配置工程并生成项目代码+ C/ z# j% c2 I, x# K
3、计算理论功耗,测量实际功耗并对比# h1 d" L2 |, V" Z3 r: G
: ?! j Y& B- }; a7 V% z
收获满满的一天,下面把学习的资料分享给大家:6 x& F3 `4 Y5 c0 N* |' ~
5 ]: y( l# c/ [) r9 I; x( k: h9 P4 I* a( H
8 x% A3 L, W( I8 l
00_Part0_20170516_Xi'an_MassMarket_Begin.pdf
(1.22 MB, 下载次数: 193)
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哦,刚才终于找到资料了,不用麻烦了
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我是你的一份粉丝
谢谢支持,以后多多交流
3群的网友哦!
我之前在上海的时候参加过一次,现在在西安