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”。0 W, ?2 ]% j6 F [( W
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。
7 |8 N3 b+ p; O) d- p6 _- z 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。5 |" ~1 F1 a- _5 ]" H% k( ?
4 r& Z' o2 ?( `2 m9 e" e; R; W
' |* m4 k% [& M- Y& e
( s1 l. i. A! H# s* ]+ p
+ Y0 J* @ i" Z- M$ ~- d 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。
, t( `- d6 P" F/ _6 |8 B& i# i4 E. W/ c( j
一、ST MCU Finder
3 ~8 L% L) s" L 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
6 `* E; \' F) B. N- J' {
7 H3 f1 t. _( Z
上面的是图标,下面是软件打开后界面:
' l: F7 X8 N4 x
* |' @1 m1 ~' V# N( o
; Z0 Y5 x& d# g8 U. e8 f
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。7 |3 F+ _7 W" p( _; g
7 a# I. o2 E2 T! l* w l0 x 二、STM32CubeMX
! k' K# E) I E 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。7 J; o& l* _1 b5 Y+ Z
0 F# S' |1 T7 C' P+ M2 N上面是STM32CubeMX的图标,下面是使用的详图:7 o9 j, p% d. J; s" |, K }
0 b z5 Y @' e9 L& j! P
以STM32L476 nucleo板子为例,创建一个项目0 x4 L i5 ]7 T% P$ I4 {4 p
8 R) @5 c7 n* `8 d( K" C& W
/ X) c4 W) ]3 Y! S$ _; 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。- l4 g8 u) J5 n& y
7 z, r- y: X/ g, M 三:常用的网站及公众号:
. ~ _' R# M ~( J- m STM32社区:https://www.stmcu.org.cn/
# T' w+ |- K- d4 M4 {* b; D STM32中文官网:http://www.stmcu.com.cn$ I0 Y, U; H8 @6 |' ~6 P
STM32四轴飞行器教程:https://www.moore8.com/courses/course/13083 ~! K! k% p9 @4 G+ v
公众号:STM32单片机% i5 ^9 o0 i4 V& }5 V5 k- y3 X- }
! b# ~3 \0 S6 y+ C# ?* O- ~2 C% C% T7 Q4 h- W( \% `; a
d/ H$ t: K8 X/ L! s* ~ 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:$ h) t6 |' }9 U( Y
1、在低功耗案例分享中学习到的东西有以下几点:9 T6 s1 y1 X4 T3 W! z
#、影响低功耗设计的几个因素:
1 H( s: _ Y: M: [1 R) P$ D: u# } *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
9 N5 }! n7 a# y6 i *晶体管数量不同:这个是显而易见的一个因素
+ t' d( A$ o& j+ Q' v$ k) b *模拟外设的使用:模拟外设相对耗电量比较大6 Q" n. l$ M) X8 d; B$ {
*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
$ V0 A& H! t8 Q *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
9 j# T, ]9 g& H( d' L( I9 F9 z *时钟频率:时钟频率越高,耗电量越大
. L1 n2 m% Z3 v5 \ *工作模式:不同的工作模式耗电量不同,这个是显而易见的: q' c4 f9 ?3 I [+ Y5 t; H9 B+ n. m; g
#、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$ k) d q$ _# l1 D
#、L4系列独有的电压转换器,可调时钟源,SMPS等.
0 M. V8 m5 R; [! P1 v. Y- ^6 O #、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
: v+ w: h4 c A3 V+ C$ U #、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$ `$ Y8 O8 A: V
#、中断标识未清除也可能导致功耗上升
& ?0 L9 M" s! U1 |. A6 O: P; C #、虚焊等其他情况也可能导致功耗异常- V2 I% s0 e, `$ S) }9 J
#、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8 _/ y$ q' x9 y# C. b
#、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& g+ R7 H! o0 \: u$ H8 E: o; a. _
#、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" |. R$ h) i- V U' t3 y
2、HandsOn环节的实验学习(具体实验安排我就不说了,请参考ppt):
8 L; Y: [6 N) I 代码如下:! t8 S8 X( Z3 \! Y
- /* Includes ------------------------------------------------------------------*/
# R0 ], {* ]5 p$ ^9 V - #include "main.h"% a6 o; k O, c* a
- #include "stm32l4xx_hal.h"
/ j/ S$ w5 Q& n4 H/ @
8 K, R! z7 ~8 e, Q7 |1 c- /* USER CODE BEGIN Includes */
}# k( W G/ n9 z: L9 Q+ S- \# O - #include <stdio.h>
, l" }4 }& i$ Q# s4 y- N1 q - #include "string.h"9 R: U! Y/ r; N' i6 ? u* p
- 4 D7 ?' {( {8 L: ]7 p& \0 K" V
- #ifdef __GNUC__
9 e% S& y+ f$ _4 @# ]6 v - /* With GCC, small printf (option LD Linker->Libraries->Small printf
+ i! e3 U }- f/ n - set to 'Yes') calls __io_putchar() */
1 E$ q) x# p# m - #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
- ]$ W, Z$ l2 n6 W9 q4 F1 N - #else
/ b a6 S2 }; q# L J - #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)4 z S! x$ b+ U# Q" ~* b
- #endif /* __GNUC__ */! u8 T, l) s5 E4 T \" T! v
- 6 ?# i% l. K( c( V, n1 `
- /* USER CODE END Includes */- J2 @" Z. B* f# J) p% N- K3 I |
- 0 h: ?+ j+ W( c! l
- /* Private variables ---------------------------------------------------------*/5 Y" M' U* e9 Y; Y# k! y
- UART_HandleTypeDef huart2;
9 ?0 E4 M9 I1 H& y' m' m
4 f; K9 T( {# @: \- G- /* USER CODE BEGIN PV */9 w7 x z+ f8 h
- /* Private variables ---------------------------------------------------------*/6 t, I u3 p# J! i
- __IO uint8_t ReceiveStatus = 0;: i8 Y/ q; e) P; ^4 C7 `
- __IO uint16_t RxCmdCounter = 0;1 Z8 W" f7 u) }9 r' O
- __IO uint8_t ReadyToReception = 0;+ F/ H/ m2 q7 f1 T0 S' O
- __IO uint8_t CmdEnteredOk = 0;4 ]* N0 U6 j" J! r
- $ U/ B( @' l2 L6 ?6 O* I6 E6 L
- #define LR_ASCII_VALUE ((uint8_t)0x0A)
* D! C; {+ q6 o - #define CR_ASCII_VALUE ((uint8_t)0x0D)
C" z; S# u X# J- N" i - #define RXCOMMANDSIZE 0x20
% Y; [! ~- t t* t$ } - #define RXBUFFERSIZE 0x01
5 M" }* z& q* X% X
" n! T! \6 i! ]# V0 J) [, L- , X" c7 L4 v2 a& S% ^
- char RxCommand[RXCOMMANDSIZE];" y' W) _. L! B3 V& `4 j
- uint8_t RxBuffer[RXBUFFERSIZE] = {0}; //transmitting byte per byte' p+ {( u0 Q$ ^2 u
- ) D, X8 ~1 K5 y$ Z X; F- R {
- char temp; //initialisation character
9 q+ v+ {% ~% {% | F2 P( J - char * s;
& R# ]+ z1 a- r1 R* T. w
; y: U% a7 G% ?2 M7 }3 A- /* USER CODE END PV */
+ i' y# z1 ~+ z$ Q
; h/ L$ a+ @9 D( t- /* Private function prototypes -----------------------------------------------*/- d0 m+ _0 p5 G6 T4 G0 ~- D
- void SystemClock_Config(void);
4 B& {7 l6 o6 B8 N6 T - void Error_Handler(void);
, `/ t: f) l8 z4 ` - static void MX_GPIO_Init(void);
- o4 \4 P% Q& n - static void MX_USART2_UART_Init(void);0 K* p D3 D) ? c; _
- r6 S! M, F) ~8 u z0 G9 q
- /* USER CODE BEGIN PFP */
" e; y7 v K# j4 u, r! { - /* Private function prototypes -----------------------------------------------*/9 ?5 I7 D- a' M9 E }7 X
- void DecodeReception(void);
' o: H0 P0 |$ B0 T7 u - void LSE_OFF_Config(void);
' ^0 k- v7 y) ^+ _* d+ \( i4 k- q - extern void test_shutdown(void); - w. b S" _6 }
- extern void test_standby(void);
3 {* x9 E8 Y4 Z1 U - extern void test_lpsleep_2mhz(void);
# N6 P |6 l( t" v$ W" D6 V - extern void test_stop2(void);
3 O' t* g) ?4 {: K/ Q - /* USER CODE END PFP */2 C% [5 z0 t* u, Y
- & \: w! _$ J- h2 u+ i2 h
- /* USER CODE BEGIN 0 */
. c! t& r0 a% A( d {: u4 V - . V' Q1 a1 x7 y, x9 n+ p5 G
- /* USER CODE END 0 */) m9 b0 I ?$ Q l4 Q
1 M3 M9 _1 h# @( t' X: I- int main(void)' X6 \+ d. M, T2 v$ h2 z
- {) V1 [- q: e! v3 x/ r; Y
2 ?; ]( R; W1 W- /* USER CODE BEGIN 1 */
+ I7 B5 N3 Z( N0 m
$ ?+ c2 K7 P, G x& @- /* USER CODE END 1 */
7 q0 ~% T# M) x/ l( c/ {% h# H5 x
& }7 X6 A5 J- A7 _! C5 D) U- /* MCU Configuration----------------------------------------------------------*/& {1 C5 D- p3 P8 @6 n$ |
- . r0 ]" \6 y& h& `3 c& d# n
- /* Reset of all peripherals, Initializes the Flash interface and the Systick. */' [$ w- `* _- v7 W* L
- HAL_Init();
+ p8 u9 N# L/ u# k* v# g# G! l
; X# N7 ~7 y; g' V" C) B- /* Configure the system clock */
6 ]6 F0 p7 j$ f; ~ - SystemClock_Config();- s/ B; u j' g1 j
- ; q2 b9 M& Z& r) n; A8 E4 B8 b w. r5 P
- /* Initialize all configured peripherals */
9 _0 V) I% s" x9 O - MX_GPIO_Init();- ~5 Y& t6 c9 d# d6 X. r. T
- MX_USART2_UART_Init();
! C6 W- |- e1 c0 ?6 G$ D5 ? - 1 s' [0 q$ S9 o
- /* USER CODE BEGIN 2 */* J0 }# j% V* k
- " S7 G0 n! b+ b8 V) E# l
- HAL_Delay(1000);//delay 1s
$ O0 k7 [8 u2 ?4 u( S* y/ D
& z* [5 o2 u# U% N- /* Output a message on Hyperterminal using printf function */
6 u! K5 M7 ]/ s - printf("\n\rREADY\n\r");
3 O$ }1 q3 e$ `! E3 F3 }- u - printf("Please enter the test number according below options\n\r"); c( Y9 Y& R) ~) A8 |% k
- printf(" 0 (SHUTDOWN) \n\r");
* G; ~+ E5 N* A - printf(" 1 (STANDBY) \n\r");
6 A+ `# {: ?1 g - printf(" 2 (STOP2) \n\r");% H: A! @. _; H& y4 z; J
- printf(" 3 (LPSLEEP 2MHz - FLASH OFF) \n\r");
9 [( p1 \3 S6 ?1 F7 ?, a - " L* m- u- e& Y6 Q1 m- B
- printf(" --> \n\r");
9 v4 v9 r% I( Z6 x: \9 G - ; A5 Y* i% K" q# F( G
- while (CmdEnteredOk != 0x1) {/ X; l/ W. i1 E$ N; r* n V1 S
- ReceiveStatus = 0;
" _/ y( s, Y9 k; n% m - while (ReceiveStatus != 0x1){4 {6 v+ C/ Z2 i) S/ k' n
- /* Start the USART2 Receive process to receive the RxBuffer */
; _' |% M% f: }0 A" P3 ]: U' \6 n - if(HAL_UART_Receive_IT(&huart2, RxBuffer, RXBUFFERSIZE) != HAL_OK)3 z' Q o) [; o+ Z
- {
5 ^9 W( x6 l# b: y4 V - Error_Handler();
! G$ }8 J& b; o4 l2 I* Y5 K - }
- M/ C" h$ l# |! d0 ?3 o - while (!ReadyToReception);7 _, J1 P$ Q! z4 |
- ReadyToReception = 0;: E _, ]" }. P7 r: b+ I
- DecodeReception(); 2 @5 R* k6 R5 s5 c3 |
- }7 w3 T5 {# ~; }" Z" s& R, D3 }& A
- CmdEnteredOk = 1;
$ }# f4 w) [5 I( b - ' _: l w7 A+ {% c( L: s4 j
- s = RxCommand;
1 K! U& j* h2 P" w# z -
2 A/ x7 x* j( a' V - // __EFF_NENW1NW2 __ATTRIBUTES int strcmp(const char *, const char *);% X% r: @) d2 i; A3 b2 z
- // strcmp(s, "x\r") ==0, input char is x\r, it is true
# C4 ]% y0 C; c. l' C. { - 7 z. C3 P) v& d" \! e9 r8 N
- // TODO 5: If receive char "0", enter into Shutdown mode - f3 T2 H% t7 X' T! N
- ; c/ x. r+ x' L0 u/ s% ]
- 1 \) r9 @# a; t: G; u
- // TODO 6: If receive char "1", enter into Standby mode 9 [( F0 c* M4 g8 _! h% M- C. l4 S
-
* \( P$ O) N' V1 ~. t i/ Z) g - 6 U- M5 Q( O- O& M1 N% r+ ?
- // TODO 7: If receive char "2", enter into Stop2 mode( w/ @0 \2 C6 |5 `% x7 n/ H$ I+ y
-
/ L9 C, G) Q6 g5 |3 L -
. p M/ Q `$ h2 c - // TODO 8: If receive char "3", enter into Low Power Sleep8 s% U% K) N# a0 d3 `8 }$ r
- ) x% l1 u* b& g- [2 y- X, k) t8 m
-
& s2 W4 D* F% F3 W8 k3 c1 ?. _ - else {
- }6 }1 p- ~1 z7 N - printf("Invalid test number.. Please enter again\n\r");; n+ b9 E4 v1 Q$ I) s( O
- CmdEnteredOk = 0;5 K- ?1 S$ l o' W
- /* Reset received test number array */
7 j8 [5 w: e2 m* Y" z/ j' q/ A) R - memset(RxCommand, 0, RXCOMMANDSIZE);2 [! M& \9 M5 c) _% F5 p" Y
- }
. R; C0 R( A& W# Q -
2 k8 U* v3 \; Z0 T - }
. r. g3 c+ }( J% Z8 W" h' { -
, }$ ~6 [, [% G0 o5 q - /* USER CODE END 2 */
0 R4 ]6 D3 r7 h& ^+ {+ z4 ^ - ' Y# J$ U2 ^% L% |- E9 N
- /* Infinite loop */
* Y2 ?" e, A7 f- r- E* x - /* USER CODE BEGIN WHILE */: W/ l+ Y, @2 c4 z& O' b
- while (1)6 t6 F% `3 b& D4 x# w( A/ D
- {
0 i3 U& }/ N9 S0 R S1 N3 b - /* USER CODE END WHILE */
8 n% _2 f3 Q% X/ J* W! E. s# [1 Y
5 r: `* x- T, R0 R, q; i( m' c- /* USER CODE BEGIN 3 */
! ~7 w G' C9 e6 _ M5 P# F
( R+ k. C5 q7 r2 y9 Z) Z# E4 g- }
/ o. z! O5 e; M/ A4 ]; P# c ] - /* USER CODE END 3 */
; i; a4 a. B+ U3 y' m0 B ^0 S - 8 c$ _% g* e. B8 \7 {
- }$ ~" C+ u% y6 v; R( n7 h- o) E
: u4 A" y( B Z: A- /** System Clock Configuration
2 ~5 U6 W: G9 y8 n* y4 K6 J7 _7 k - */
' |4 [; f" A+ S k: { - void SystemClock_Config(void); I& ?" k u; Z
- {
9 |4 V& [4 a, p0 Q2 ] - * s% X7 q5 v: H3 m* A2 |3 G3 d
- RCC_OscInitTypeDef RCC_OscInitStruct;: c) }( c- ?2 ~( ]+ c# T% S$ o
- RCC_ClkInitTypeDef RCC_ClkInitStruct;9 e! ?* F6 L1 E( J
- RCC_PeriphCLKInitTypeDef PeriphClkInit;
7 Q j1 {: {' {7 [6 L8 E# j6 a* l& X- Q
& f4 t$ Y# ^7 g# v- /**Initializes the CPU, AHB and APB busses clocks
4 G0 O, Y' V$ z; s, h' H9 b; c - */2 d. q% A5 c m1 w! a d5 c
- RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
0 u1 x7 m: }. H* w6 w4 k0 ~ - RCC_OscInitStruct.MSIState = RCC_MSI_ON;
1 n4 Y# V% L" [+ P% y - RCC_OscInitStruct.MSICalibrationValue = 0;* S" E8 p, |: s1 T' ~0 G3 D3 ?
- RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6;
# a/ p3 I+ i* R4 B - RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;! v1 h( t, v( w9 H5 D& i
- if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)6 x7 O/ q# W5 `& R' M9 S
- {
: E$ G/ N$ \. Z - Error_Handler();
0 s5 i1 F2 S. f( ?7 L - }
; U/ a4 F! M) i' U( C6 K
$ ~! _% m2 g/ i7 y' z- /**Initializes the CPU, AHB and APB busses clocks 1 j) i% M8 D7 O
- */
) p5 I: K1 b& ]. |, a' K9 R. \ - RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
2 o' S1 D+ G, N% C. E& } - |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;4 P3 {- `) g9 w) o; y
- RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;1 ~3 V4 [4 @+ O8 [
- RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;# J2 {- q7 h- W& _3 {3 r
- RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
" R: b& j$ K; E. f5 |5 K; O - RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;! N* C) \2 I0 h7 X' J
- # v+ ^" F8 N$ c, E1 ^4 e0 H
- if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
1 I5 v9 T& y0 N& k+ I: a - {
% y J* g5 E6 N9 t2 r# J - Error_Handler();
# @9 e' D" `4 f - }
4 d4 ^. U. Z: S' N9 J( E
4 y P0 N) @6 k0 |! k4 U- PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2;
0 U5 U$ J6 Q% q T# c: S) Z0 p - PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;
- s& b& f. U$ U - if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
' k# u5 V" X6 H8 v2 \ - {
( _+ n0 ?0 t. p; Z* P7 J5 K - Error_Handler();
9 N. K% Q$ I6 A1 v - }' F5 r* r x, W
- ) g; S9 r5 n. W- V' q% R6 I' z
- /**Configure the main internal regulator output voltage
' F! n0 r) q$ ^/ J4 V - */2 V& S a& O6 V( W
- if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK)
% B: }7 i: W( X3 {( c( F - {6 X5 g$ T7 g; f, q& V
- Error_Handler();
) `( b% T! s8 m; x) } - }) f/ g, P- U) s$ ?; c5 p( L9 C% W
2 k& U. h R. G5 O7 X4 e+ E- /**Configure the Systick interrupt time
, z! Y) H1 E: I - */
3 s- G3 P z7 h7 ~ Q. q - HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);
" o6 ?0 r; ]# T: T1 W' d* g1 B - ! M2 m& O" @! r. q& [
- /**Configure the Systick
3 z. A9 S8 y" ~+ S2 l4 m: h - */& [7 U5 _) Q# G) k! H
- HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);" z; S1 Z2 F6 T, e1 i
9 P5 m4 ?8 s2 J8 d. G7 E- /* SysTick_IRQn interrupt configuration */8 O4 A, H% ~6 _" U7 G9 O
- HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
[. N7 z7 H3 H- P& ^! L8 ] - }2 s, p5 c `* W
- 5 k$ C0 Q4 f/ J' }2 d2 b/ M" Z6 z F
- /* USART2 init function */; x/ J A: i3 e( \7 B
- static void MX_USART2_UART_Init(void)
" U" N3 `$ L5 b" M7 N - {( S2 V9 _# `$ M- m6 R, P
- : p7 z G4 s) r+ u7 Y5 C0 a
- huart2.Instance = USART2;
- e- q& J* i9 ]7 q3 G1 H- [ - huart2.Init.BaudRate = 9600;; q2 f0 \/ k6 [" d4 b/ w* w
- huart2.Init.WordLength = UART_WORDLENGTH_8B;
& t4 \ j4 A. }( R( t$ { - huart2.Init.StopBits = UART_STOPBITS_1;& A e# u$ }: r. J* u% \
- huart2.Init.Parity = UART_PARITY_NONE;
7 [+ T' x) i. t# m! p - huart2.Init.Mode = UART_MODE_TX_RX;
& }. O7 p# p1 @( e# ^1 o - huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;2 r5 L( l, A5 M4 L* E
- huart2.Init.OverSampling = UART_OVERSAMPLING_16;
2 h, q$ l) ]9 A N4 q j - huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
* ]0 o! w0 F! k* |' E/ v - huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;' r% e) H* ?$ a4 ~; n0 k
- if (HAL_UART_Init(&huart2) != HAL_OK)
- v- ?4 t+ N7 z+ n' w - {
- t4 y' P: s# U$ [$ u5 q7 V - Error_Handler();' o$ Z3 m" s9 a1 O! G
- }: ^+ c, {( d. [
% b/ f+ b) B/ Z- }9 b( S& c/ l- E; m5 w
- K4 |3 v" l4 |5 }2 n3 ~. l
- /** Configure pins as 6 \5 j: v: n: Z( |1 `4 ~
- * Analog 6 ?& d& x1 h. v
- * Input 3 I- z% I2 k3 G; U3 t+ I; l
- * Output; `# T- L( E A, K' G
- * EVENT_OUT' t" s6 g: Y# g# ~
- * EXTI
% {0 a% s/ m0 ]/ b6 J( b% X - */2 w! `/ S; t! {& d0 O
- static void MX_GPIO_Init(void)
' z3 J: C Y' K' f }4 _2 i - {
* g5 F2 P! I- u$ G/ ~: _( \ - 4 q! h% w2 s" P0 \4 K" q% }
- GPIO_InitTypeDef GPIO_InitStruct;6 c' H, b6 Z9 a, r% K# h
- 0 P# y6 ` S5 X3 V7 _
- /* GPIO Ports Clock Enable */
3 Z9 P+ A \% f0 Z+ q - __HAL_RCC_GPIOC_CLK_ENABLE();; o! w8 t( }- w$ g' c
- __HAL_RCC_GPIOH_CLK_ENABLE();
, s; x/ W. i) y2 ?( c. I" p$ ?6 W - __HAL_RCC_GPIOA_CLK_ENABLE();
( N$ _$ Y1 T/ F8 Y: _( G" V( A - __HAL_RCC_GPIOB_CLK_ENABLE();
# O; A+ V! O# U* Z8 `- d - : V. e$ y7 \2 @/ W
- /*Configure GPIO pin : PC13 */
- q1 z& C0 g, _# F- ~ - GPIO_InitStruct.Pin = GPIO_PIN_13;7 W, n8 J. M. m( u |8 t% s- b
- GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
/ g- ? P# R8 r% @* J; T D9 T - GPIO_InitStruct.Pull = GPIO_NOPULL;
9 [$ O! [/ z I1 L - HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);6 Y; e; i y3 F8 k; ]- Q
* @2 f, Q% G- A9 v- }5 M5 c' v: e, R' d1 y; C8 ~5 X
5 [0 s. ^; x# Z2 j+ W; W* R3 g( D- /* USER CODE BEGIN 4 */
& Y+ o; V+ t: i
8 A2 V8 y5 a8 v( C; g- PUTCHAR_PROTOTYPE
/ j$ f0 |. ]1 Y6 a - { ^& Z/ i4 u3 o6 `7 T
- /* Place your implementation of fputc here */0 M# x P! L' [$ H
- /* e.g. write a character to the EVAL_COM1 and Loop until the end of transmission */% _+ G+ P1 s; L6 d' k5 Z
- HAL_UART_Transmit(&huart2, (uint8_t *)&ch, 1, 0xFFFF); 2 I. E& [4 `) s7 {
- ; x+ M; l, j h+ W! n
- return ch;
4 ~: A3 }, B9 U8 S q5 K - }6 y. M* I5 ]" S" s" X
* k; @2 P& Q3 Z/ l3 |1 g- void DecodeReception(void)
# ]1 R- {) T+ j' x) g* n - {/ q/ X7 q6 U6 `) t4 t) `3 o
- /* Read one byte from the receive data register */) x0 S/ p7 q. P: I/ Q; C
- temp = (char) RxBuffer[0];8 C- A# `" r8 H( N: [. M, W
- RxCommand[RxCmdCounter++] = temp;7 F1 i9 H: z- h: j" o c
- + L, Z/ N. U: k" `
- /* Check if is an LR/CR character */
, b& T3 |2 A+ I6 P4 D - if ((temp == CR_ASCII_VALUE) || (temp == LR_ASCII_VALUE))9 R- |5 I6 ]/ J& Z- Q2 s+ @
- {
9 m: f4 r* G n+ ^' b2 R& c - /* echo entered command on terminal */ i2 U/ @1 E2 f, Y! z' d) s8 z) h, Y
- printf("You entered below test number:\n\r");4 z! y. D- f5 L' V( S6 a
- printf(RxCommand);$ S3 w+ E4 F) \- u8 u8 v9 S
- printf("\n\r");7 \ o# C7 a5 W: r* A$ g" g
- + T+ U' v* f9 ?: v( x: [3 K
- RxCmdCounter = 0;
S# O) L! R8 _! c( F8 ?# p5 i - 5 y. h1 m& z5 h/ Z8 n1 @9 N
- ReceiveStatus = 1;
4 V# q) \5 O3 @4 U% \& \ E - }* ]* h; f5 j c' L& ~0 X/ j: d
- }2 { b. Z* o" o2 P1 d. s
- e ]: e8 Z( b. a
- void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)7 `; ]7 C1 T/ D9 L% N8 b
- {/ M: m# D3 B" H: Y
- ReadyToReception = 1;4 }1 u- z6 ]/ Y" ?
- }
' ~. r# L; A4 m
& [/ ]) B) E1 }. U$ ^- void SystemClock_2MHz(void)
6 i( ~, e/ v2 ]# k: V: Y5 _ - {4 k) H) D/ q7 a2 e2 S
- RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};, ^9 l; S7 Z+ ~7 W) G
- RCC_OscInitTypeDef RCC_OscInitStruct = {0};+ \0 q- f* f( e3 J
/ t" O) T* E- K& i0 S; ?) o( ^7 p1 E- /* MSI is enabled after System reset, update MSI to 2Mhz (RCC_MSIRANGE_5) */- m' B- q! T) y4 G0 N2 [/ [
- RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI; p. t2 V0 u+ }: X3 ]2 U' J
- RCC_OscInitStruct.MSIState = RCC_MSI_ON; k, \# x( J3 X" l) b
- RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_5;
! u! r, y- x) N, H! b& T7 D2 ?# R" }; C - RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
/ Q) ~& ^* G& B- b) O( R - RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
8 Z U4 w' u- p- T - if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
) E! l/ W l6 `- t$ Z/ x% Q M - {
9 I0 }5 P; S4 H9 B0 t! j7 [8 ^ ` - /* Initialization Error */
8 {8 d6 q3 r) k( z& X - Error_Handler();1 \& S8 s d2 q9 r
- }
7 K# r- b+ ]; w; g% B. I - ' N X4 @% k: ]2 N. ~
- /* Select MSI as system clock source and configure the HCLK, PCLK1 and PCLK2 , \+ Y$ g* v9 V& W, g) b- O5 b
- clocks dividers */
. z, @5 ]1 v" G6 J Z. W8 H1 b2 L - RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK;8 }2 W$ ` [4 i. G9 U$ V
- RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
I8 ]' b4 M: T- Y5 V4 f - RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
- a5 n, |! w* N. |6 g$ z - RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1; ; y/ Q l! Q1 Q; t7 t
- RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;5 z( F" g1 ]9 l8 L
- if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK) T1 k) r) u: p" P
- {
& M4 v0 r+ w$ q d - /* Initialization Error */9 M! ~: ^; m/ h* y; x/ N
- Error_Handler();
{1 i. X' s) }8 T% {, F- m! ] - }
( i* W+ d5 D. E$ N6 _* s; g -
5 `. r P( s; q6 }5 N - }
* L' w( F* Y7 i0 c& ?2 c - 1 D6 d) a1 A7 o% j5 ~
- void GPIO_AnalogState_Config(void)/ d* W& F, p, K p5 A5 b
- {
( ]* e& i9 b+ o3 h) V" j - GPIO_InitTypeDef GPIO_InitStruct;
" g, Q" U( ^9 e0 b -
& _) A! J2 w/ l - /* Set all GPIO in analog state to reduce power consumption, */( y; R$ I8 N6 ?
-
* m, x E6 }8 S; _: J0 { - __HAL_RCC_GPIOA_CLK_ENABLE();
. h3 p8 Q3 S9 B# M1 r - __HAL_RCC_GPIOB_CLK_ENABLE();5 Y1 g, j4 ~6 g1 G v7 C
- __HAL_RCC_GPIOC_CLK_ENABLE();
: k. h% I/ \2 u: g- v - __HAL_RCC_GPIOD_CLK_ENABLE();
4 l$ N5 U; d+ V# U - __HAL_RCC_GPIOE_CLK_ENABLE();8 p& K+ e. D7 i4 g) a4 y- \
- __HAL_RCC_GPIOF_CLK_ENABLE();3 u( @- L. U- E/ d4 K5 j7 e0 Q
- __HAL_RCC_GPIOG_CLK_ENABLE();
- A2 {: E! ^& X3 j - __HAL_RCC_GPIOH_CLK_ENABLE();
! Y) z* n8 y5 }6 ~8 c6 P - # Z: b3 Y$ g( K# p3 c7 Y! d' b j
- GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
0 M. ^' s1 D) v" v/ \ - GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
9 M# ~, S% v- ]- y- T - GPIO_InitStruct.Pull = GPIO_NOPULL;8 b9 ]/ e' w4 |) z& j0 O' j5 K
- GPIO_InitStruct.Pin = GPIO_PIN_All;
% P* q* V( c; I
* m6 D4 f9 q. D& y0 N& _3 n) b- HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
" `, {5 r/ X8 y4 ?; l - HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
B: Y9 ~, ?' H - HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
/ Y' i1 x! N1 R. o# b5 |$ f3 o - HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);/ Q0 J" B8 o& ^1 M% Y3 o3 U2 c
- HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);
$ J2 H; {2 j; u6 } - HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);- H; Z: }- J8 Y1 `
- HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);
# u8 |( U! B1 [: s+ c7 q6 N) A9 h - HAL_GPIO_Init(GPIOH, &GPIO_InitStruct); , L0 r6 T& B. c# {
1 z$ P) b' {, P. X5 @/ ^- f- U- __HAL_RCC_GPIOA_CLK_DISABLE();
; w" @2 X7 p; _% q - __HAL_RCC_GPIOB_CLK_DISABLE();3 P0 L" ~) C0 d0 t% n& j5 N* P
- __HAL_RCC_GPIOC_CLK_DISABLE();
- w5 z f' G8 n - __HAL_RCC_GPIOD_CLK_DISABLE();
4 x2 R# t7 d! c; Z6 N; o# n - __HAL_RCC_GPIOE_CLK_DISABLE();- O9 j! Z# H5 P
- __HAL_RCC_GPIOF_CLK_DISABLE();- s' M, N4 E' q
- __HAL_RCC_GPIOG_CLK_DISABLE();, ?3 g# K T. L& ]- z
- __HAL_RCC_GPIOH_CLK_DISABLE();6 u J ~( n& U; j" J
- ) |0 {- h% S; f9 L- G- s" W
- }
! k( u9 ~3 P$ m+ n; p2 s" I - 8 ^7 o/ @) \- Z' _2 i
- void LSE_OFF_Config(void)
8 r) L" G9 T7 b - {8 g+ P* _7 |: D$ G" `
- RCC_OscInitTypeDef RCC_OscInitStruct = {0};6 Z3 S. x% `4 S8 d# i
- / `$ Z9 R5 \2 Y4 Q$ s
- /* set LSE OFF */
$ c* d, y) V, x! X% R+ e) a - RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
6 {) R; C: r6 O2 z5 A - RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
* m& m5 ^- ?" x% x7 } - if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
, c& T# m( a3 J0 {! i N# \; s - {% X2 U! ~% `3 ^1 p" ^$ \
- /* Initialization Error *// C, H0 k3 z$ V8 p
- Error_Handler();- i* R' I5 }, y- I3 s
- }2 Q$ o# ^* t1 {) Y3 E
. e$ F5 v# N- p& d* u- }
+ I& |5 X. T$ k( b$ }/ Z- A5 r: q
( S2 p/ Y8 U9 ]- 0 I8 l7 Z2 [0 P9 R
- // TODO 1: Enter into Shutdown mode
0 ~0 o0 z% e. t( B6 q9 C
+ R! D1 k4 H+ ?* h5 l, g% {- 2 }; W3 m* t& U) i Q
- // TODO 2: Enter into Standby mode" h |8 [7 \7 |! u: f* ?
( h$ e4 z) B* X' a& g* j/ U
9 K! g" ~8 w/ x8 Z# L; G- // TODO 3: Enter into Stop2 mode
5 K2 R% t$ h% r( Y8 L( ^& e - ' \5 z2 Y5 T1 Y8 j
- : {' U; f2 r9 u1 `' p! F
- // TODO 4: Enter into Low Power Sleep mode
4 e: G. f2 g6 H$ ^* D - " e P" e; e) V: S0 \: }
9 p9 p5 W) n. `! |4 S# i" [ X& a
r" h% d. m5 ~: P7 L5 X- /* USER CODE END 4 */
$ T+ |. d5 D% E7 x1 A- _
[+ s4 ?0 v0 Y- /**! u8 N3 ~* }1 p6 ?6 u. a3 O/ C4 U$ i
- * @brief This function is executed in case of error occurrence.
& v4 M9 ~- G: k5 S0 L* d% P - * @param None
( Q" `, _# b3 `$ E - * @retval None% Z6 r. k* Y, Z+ [- f6 w
- */; C4 M% {7 O9 G
- void Error_Handler(void)/ a, i- Q8 t- L4 ?# c y
- {9 M- m5 G0 N0 _
- /* USER CODE BEGIN Error_Handler */6 D- |: ^- [+ Q5 L& a
- /* User can add his own implementation to report the HAL error return state */
1 t3 u' t5 M% e" M/ V/ q - while(1) $ c `% X B/ ?. F {3 G& y# A8 V7 k
- {) O! K8 E* N2 ?- f8 J) Z
- }, j. E- K: { x2 r9 {
- /* USER CODE END Error_Handler */
, n! g% O/ g) k$ }8 c# m6 \ - }
: E" ?3 j) j$ j' | - ) f& q: \0 Z% \: c% ?/ R' V. W1 H
- #ifdef USE_FULL_ASSERT M0 n- L$ s. j& ~6 s8 i
- f# `: s/ j( o8 n& F$ e) t- /**
: z( V# k% O) o" Y - * @brief Reports the name of the source file and the source line number
0 j& a# M* j p) w7 _1 E& P# [ - * where the assert_param error has occurred.: U1 N, N3 i( i' u) ?$ D
- * @param file: pointer to the source file name' ]& S. r+ e! \" s
- * @param line: assert_param error line source number3 E" x3 Q6 r0 g+ Z: R. s- U
- * @retval None- i7 v6 `! S! ` F% X" L3 m
- */
- W% O4 Q, Z) H P4 h, O! J - void assert_failed(uint8_t* file, uint32_t line)
# d9 _9 H0 F, q# u# c1 a o - { u4 H. W' `# r# f- I) v
- /* USER CODE BEGIN 6 */. M- s" I, x+ Z. }$ j
- /* User can add his own implementation to report the file name and line number,
5 |7 e1 h- X4 Y/ f& T; d* v; |7 T- ? - ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */5 ~& @5 M6 U% r5 E$ b5 S) U6 |
- /* USER CODE END 6 */3 l( ?/ T) x' n' {
3 B- X/ y. Q8 I1 n& {0 J- }% C _( P: r7 V9 r
- + N; |1 {$ E' a- i& F5 ]
- #endif5 W* N' L2 R9 ~% \& r6 ]) F
- 9 H7 V3 X7 V3 N4 F% U5 r
- /**
9 D. f! U' P+ E0 A - * @}
% _, S" C- }# p - */
" ^5 T. _8 ^5 K7 W: _
& c. A* K! d2 }$ f' i- /**- [& w$ Q: l* O, P" j
- * @}& R( T: m; K( n: H
- */
7 a* B& J7 k* I1 g2 ?- |# H0 H
: y2 ?( Y! E& C! n" v# y- /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
( S% X' b4 N5 f
复制代码 上面是修改之前的代码。
* F& a7 P7 k" v( P3 f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 I H; E+ u5 B0 j- M
: X) w" _, ?# G7 c) V: L
3 z) v, A3 \. `, t* ]( c z; k$ G
大家也可以根据帖子里共享的ppt思考一下补全代码。
& z. C1 A# b2 E! N( M: U: I. {6 E. A) m# b4 G
总之昨天学到了以下东西:
. N# h% s3 u5 K! q# w1、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
7 t+ y- T+ Q4 B4 N) S- n( t/ U2、能够使用CUBE MX配置工程并生成项目代码; y" u# v* H- d
3、计算理论功耗,测量实际功耗并对比
* `& P9 F" _0 q8 Q& y; H1 A- W) Y! U4 \- G8 y% e7 C# C2 q
收获满满的一天,下面把学习的资料分享给大家:
4 ~9 K7 p7 A5 [3 C( m J# f# e8 w1 T
8 |. s4 q9 r, [" l
: Q7 ~/ T: {) k6 a0 k& K7 ]4 x
( y$ ^! v. q& m3 W9 D4 D
00_Part0_20170516_Xi'an_MassMarket_Begin.pdf
(1.22 MB, 下载次数: 193)
|
哦,刚才终于找到资料了,不用麻烦了
您是哪位?
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