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”。" [9 }' p; f. X3 ?: p; M3 y
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。; W Q3 i1 x( s1 w2 a
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。
& B+ Q6 ~3 p5 W+ e( Y
9 I. g, f% X* A! n- ^: G' k+ V
( ?: Z8 ]0 z, ]
2 t2 k9 W3 _/ O2 t) d- b0 N) }+ L; Z) s
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。4 l" a( c9 {! H$ ` G
. X0 G5 n3 k. B/ L0 m
一、ST MCU Finder {, P8 |' G9 `% g
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
( }: o( g! h2 l. ^" e! h. e" P7 b
+ @4 M: F2 K, B% |0 D7 F* n% O
上面的是图标,下面是软件打开后界面:
. \- \" p5 m6 I! f0 j7 }
6 c, b* I3 X# s, c6 J7 x8 }( R1 f; g
) P0 m3 q8 L' L; p* a 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。( V* d+ B+ Y; s t y. Q
' H$ S1 J( J4 }: W6 ?
二、STM32CubeMX
; X( ]; Q; D( S3 X! B. O, } k; W5 @ 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。( A+ T+ X1 G' x
( z- s D- X. Z
上面是STM32CubeMX的图标,下面是使用的详图:
- p! l8 r7 L6 x. s
9 v; i# p/ x$ k8 K6 E2 O
以STM32L476 nucleo板子为例,创建一个项目# ~. M0 ?4 k8 m, b/ J
/ f) s8 n! Z2 S$ t5 R z
9 D# c9 F5 l7 u. Q" l8 _! I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。
; c o3 d) U+ I4 P+ G0 N. Q# c
0 l) l( l, o4 D7 I 三:常用的网站及公众号:+ z/ L4 A1 ?4 [% q: U
STM32社区:https://www.stmcu.org.cn/
; P# l/ O; H7 l+ K7 X- N STM32中文官网:http://www.stmcu.com.cn
; M% M' s4 ?5 W- m STM32四轴飞行器教程:https://www.moore8.com/courses/course/13083 E' ]* y) F5 M8 v: `
公众号:STM32单片机+ A: i# u$ L) w* x
4 j5 x2 w2 y' s: ~3 q- }- z
- J' [1 ^$ T8 Z! U5 Z
. f' b" v/ K! o E* S# F" n
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:
( I, y: o2 I7 X3 I2 i+ l! M 1、在低功耗案例分享中学习到的东西有以下几点:4 w, L! |" @0 o
#、影响低功耗设计的几个因素:
) A0 ?9 g2 s1 W9 F, K% t% w *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
" [# e) s0 @' K8 q2 S- I *晶体管数量不同:这个是显而易见的一个因素/ d4 K+ m; ^7 S- Q
*模拟外设的使用:模拟外设相对耗电量比较大4 L4 e( t3 T. a: i8 ^' z% H
*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
9 z* k' l& E h' E5 _ *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
5 W' g3 [3 c* Q *时钟频率:时钟频率越高,耗电量越大
7 z; o+ {2 D7 N: f+ } *工作模式:不同的工作模式耗电量不同,这个是显而易见的) V7 z6 K5 ?# O8 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4 u$ I3 ]2 Q( C3 b8 T
#、L4系列独有的电压转换器,可调时钟源,SMPS等. ?% G( x3 C2 @9 U
#、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
; u( p9 `* ?: V- C2 `, e #、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, U; Z9 l4 n7 P2 Y$ x8 Z0 Z) f7 i
#、中断标识未清除也可能导致功耗上升
, i% ~, B4 W0 L$ F #、虚焊等其他情况也可能导致功耗异常+ P$ e: N M* u% ~& ~2 A
#、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$ G# [ Y) ^: @9 p" c' V! e% h
#、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
0 f& q; N: ~/ z( v* G u #、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/ T" M: G7 N$ e6 r7 q
2、HandsOn环节的实验学习(具体实验安排我就不说了,请参考ppt):
. g$ t# ~0 S3 m2 i( S. W 代码如下:8 F7 U+ I( V3 t
- /* Includes ------------------------------------------------------------------*/
! l; _& H, S' z2 J5 S - #include "main.h"
" e, ]$ e! R" o; Y( n; ^ - #include "stm32l4xx_hal.h". F% C/ T0 Z: J" K: _8 w( {) \
- 5 M- e% Y1 V: y
- /* USER CODE BEGIN Includes */
. }" r4 F: G" c& s9 y- z- H8 \2 ^ - #include <stdio.h>
3 j0 ]9 Q5 [6 p9 G- C - #include "string.h" v" I8 o ]. w) d$ {( Y* Y
- ( ^9 ]0 {' Q) g# G- a) e, r
- #ifdef __GNUC__+ ~1 d. J6 ?( B9 P/ }
- /* With GCC, small printf (option LD Linker->Libraries->Small printf _: c% W) e3 z
- set to 'Yes') calls __io_putchar() */0 {1 n1 R& r5 y6 [* }+ k7 M0 m
- #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
7 O" W/ I& L. e; U, L, x1 g) ^ - #else. B( Q2 r" d! v1 a6 J
- #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
2 K8 T2 c, y+ A5 _ - #endif /* __GNUC__ */
0 K4 N( U- s5 d/ l5 s - % P2 g9 [; e! [8 i7 J4 ?' ?
- /* USER CODE END Includes */2 N/ |6 R, _: Z) Q
$ X+ {. r$ e0 T& ~- /* Private variables ---------------------------------------------------------*/0 ^6 a2 @7 p0 H+ K" \
- UART_HandleTypeDef huart2;& ?& [) m% ^ A' z
- 4 x) Z! d7 V: ?1 e- X7 n
- /* USER CODE BEGIN PV */6 F. ^4 q9 S( e
- /* Private variables ---------------------------------------------------------*/
5 v% a( N4 W: U2 n: A, B - __IO uint8_t ReceiveStatus = 0;9 [& W3 r. b! ~" W2 l4 K; |: o
- __IO uint16_t RxCmdCounter = 0;1 G. l9 F1 K6 K' o4 e! `& o! D( y% {
- __IO uint8_t ReadyToReception = 0;! g! ^& n1 m7 a, x3 d% V( ?& ]
- __IO uint8_t CmdEnteredOk = 0;* n( b. Z, ^- K& i+ }( m. Q
2 o3 T, e& H, p* L @- #define LR_ASCII_VALUE ((uint8_t)0x0A)
C# }( H0 n" K - #define CR_ASCII_VALUE ((uint8_t)0x0D)
% E# }2 A) O6 f7 ]# o( _2 ~ - #define RXCOMMANDSIZE 0x206 F8 _2 y" ], Q
- #define RXBUFFERSIZE 0x01
! W. E! `& |. I" U6 v0 m, O% B! G7 z4 _
- v( l8 g8 M* `6 Q3 r- 3 ^; {+ u1 K' R# a* D
- char RxCommand[RXCOMMANDSIZE];3 ^7 u7 G! a3 {0 R6 \
- uint8_t RxBuffer[RXBUFFERSIZE] = {0}; //transmitting byte per byte
/ U+ ~ j! C6 J+ C - ' [3 @6 C" p; [1 x5 p0 S( h
- char temp; //initialisation character0 a$ Y% s2 ?% j+ h& K3 `2 ?
- char * s;
- f) k y, x3 C( M p6 ^
$ ^3 e/ [ u9 d* I9 q- /* USER CODE END PV */! }; h7 b; \. H5 W
2 J* y y! l# z/ ^3 ]; X- /* Private function prototypes -----------------------------------------------*/
' P$ M* P- e: O+ y5 U/ t - void SystemClock_Config(void);
: i* t8 |4 y! J2 o5 t - void Error_Handler(void);: u2 i8 U! N- ]) U1 p, l# `
- static void MX_GPIO_Init(void);
( H$ s$ A: L5 G3 W! q5 K1 i% E - static void MX_USART2_UART_Init(void);
1 B& `& r) t# z8 B# F - 7 v1 W/ i6 [, N1 q' k
- /* USER CODE BEGIN PFP */
, G. d1 r1 a) L: V - /* Private function prototypes -----------------------------------------------*/
% b' q! d" b5 Y6 s; k0 d3 s - void DecodeReception(void);9 S& G& t5 j7 i* `( q3 {/ G# @
- void LSE_OFF_Config(void);
4 }/ [* x4 B; t% b3 H' n' d - extern void test_shutdown(void); # i/ i! A3 P( M% p$ s& s
- extern void test_standby(void);" I( w7 Z& T- R3 Z( d4 W' O% S9 U
- extern void test_lpsleep_2mhz(void);
! b/ `4 {, A3 \7 A! M: l - extern void test_stop2(void);4 _" O' d- I& X: w7 X! @
- /* USER CODE END PFP */! a! L( D' K8 v4 w
- 5 B$ K! n- Q# b [
- /* USER CODE BEGIN 0 */4 w+ F( T9 D! g* {
5 P. E4 N n' {, q' t( t- /* USER CODE END 0 */
/ K5 C! g2 G$ k& X* m
: F7 ^& f7 R! `$ ~0 n H- int main(void)0 l5 E# z7 y/ z: r& z
- {- l r/ N. U0 d3 b, \& P& h' M
- 6 `0 ^" _( x7 P2 Y
- /* USER CODE BEGIN 1 */: ]9 E' Z8 t) `3 G- X& p4 s% b$ k
- , Z4 ]0 O. o3 ~0 Y7 Q' P, k% @0 [6 J8 x
- /* USER CODE END 1 */! {( W) w. C/ \2 I2 \' \
- 4 X6 O+ ]" Q) }/ j# ~, |, j
- /* MCU Configuration----------------------------------------------------------*/
5 b2 b" Q& w0 N* ^- i - , q {2 _4 i/ A3 d& l
- /* Reset of all peripherals, Initializes the Flash interface and the Systick. */" J! y, h. [* k6 o# Z
- HAL_Init();
3 z3 H6 d) i( e0 i6 |" M& Y
2 x' U) Q5 A F2 J- /* Configure the system clock */- p) S. h/ m& v8 }; v# L, g
- SystemClock_Config();( o" H0 T/ |& x% m' R' R$ ]' d/ x
- 9 ]+ \ a' [: ~$ ]/ ?. g1 ]: q
- /* Initialize all configured peripherals */& o1 U6 Q/ i7 T
- MX_GPIO_Init();# o5 r! t8 D1 c( C0 b; i
- MX_USART2_UART_Init();6 j: Z: J9 m' R4 P6 W
- / ~2 S9 @" H! j7 ?& `
- /* USER CODE BEGIN 2 */# B0 x! w- g: E% E6 m
9 G1 G4 b, @. u$ n# h8 `- HAL_Delay(1000);//delay 1s
' [" t6 [2 l4 |: j" n( `/ w
$ w; i2 C, d! ^, h3 P3 J: J- /* Output a message on Hyperterminal using printf function */4 P3 g# Y9 @0 r2 ^4 {3 h* U: Y0 [
- printf("\n\rREADY\n\r");( V' k$ m; I$ g
- printf("Please enter the test number according below options\n\r");
1 g$ f" i" U4 B4 ~ - printf(" 0 (SHUTDOWN) \n\r");
1 \3 l. D" s& \9 b( \) r - printf(" 1 (STANDBY) \n\r");
3 h5 d H# z3 B0 t! k. d& ~ - printf(" 2 (STOP2) \n\r");
; `/ P/ p7 \1 a) l. |, t; p - printf(" 3 (LPSLEEP 2MHz - FLASH OFF) \n\r");
9 ~# Z2 q* {8 j! r$ {' r0 R - / }2 b- d3 t1 ?/ e
- printf(" --> \n\r");
# d. o5 @. n1 A1 g - ' K7 g0 S+ D( p, l
- while (CmdEnteredOk != 0x1) {: y/ h& F, j9 a0 o. H! e
- ReceiveStatus = 0;# `6 Y$ \1 S0 @" A5 T' }% h
- while (ReceiveStatus != 0x1){' C7 S- ]* w" y7 X( n
- /* Start the USART2 Receive process to receive the RxBuffer */ W- m" v1 e8 ~0 f+ o: _5 I
- if(HAL_UART_Receive_IT(&huart2, RxBuffer, RXBUFFERSIZE) != HAL_OK)
) ]. L1 c' }( Z. x! e. B: p - {, `, ]; v9 e2 ]8 S0 x
- Error_Handler();
8 P+ N% o) x+ y - }3 c5 D. p: k0 T' @* o8 M
- while (!ReadyToReception);: {( h( i2 A) q8 K, o
- ReadyToReception = 0;
8 A% }3 `2 f) _4 U% C+ ]8 b) F% E4 i5 A - DecodeReception(); 9 \4 |" K- d( l+ v* p3 N$ ^, J2 ^( Q
- }4 P3 z, ]8 s$ y# g
- CmdEnteredOk = 1;
# \: a: |* ]# J1 N# C; t, S4 w
) }/ \- o7 L9 ~6 O# }7 d3 g- s = RxCommand;3 I% K7 P( U; b* S1 {& v% u% ~% _
-
- R8 \" c8 M D% O! s - // __EFF_NENW1NW2 __ATTRIBUTES int strcmp(const char *, const char *);
1 k8 w( P+ s% J$ Y$ y. p" r - // strcmp(s, "x\r") ==0, input char is x\r, it is true, {- Z3 w+ v3 s! ~+ X. a. _! Q7 j
-
9 T3 h5 C' X0 {% ` - // TODO 5: If receive char "0", enter into Shutdown mode 7 O& H- T) o, s; M- R
- 1 C' m; Z% ]/ e$ M) t$ Q/ [
- 0 h& P# Z2 }5 U; h, d* C/ M
- // TODO 6: If receive char "1", enter into Standby mode
, G' b/ {# ~3 V9 s& C- L7 a - * p- e! v- K/ e, S* [% X
-
6 e. P" x8 g& D$ [2 Y6 ? - // TODO 7: If receive char "2", enter into Stop2 mode
3 k- M) [7 A7 j& D8 S - - b7 h3 i8 |1 m, F! [
- ( z/ y# d/ k6 G5 d
- // TODO 8: If receive char "3", enter into Low Power Sleep) r3 l1 g' t s: R
- 0 k* i+ G( e; A: m; \0 F. n
- % F( V$ V" E/ C9 p$ z# V- i
- else {% v; n2 E4 _) V3 o- G' r6 S
- printf("Invalid test number.. Please enter again\n\r");
/ I# Y3 [; L: {! v' q5 Z4 ~ g' ?! s - CmdEnteredOk = 0;
4 ~! m2 y! F4 |1 w. ^9 h' P" A - /* Reset received test number array */: N2 T7 {7 {+ f2 Y2 M# a9 G
- memset(RxCommand, 0, RXCOMMANDSIZE);
Q0 [) [; ^4 A# L/ l - }: [3 [; R* l( |3 J( }, z! o
- ( _; j; l9 N' S
- }
/ @: Z( Y+ x2 [, l! C3 l! ]& c/ [ - 4 Z! A" G! G* Z0 K, D# n
- /* USER CODE END 2 */4 `: ^; V$ J& w D( P2 p
- 5 L; X4 ^9 M" X8 `$ Y5 P2 @1 G/ s; x
- /* Infinite loop */) K9 o8 n9 W& C4 M
- /* USER CODE BEGIN WHILE */
/ s5 H* ^8 ~2 H" F' P - while (1)
+ A- ~ \" j3 j' r+ J7 z5 V0 E4 F - {
; W( d- D4 K4 ~% M/ i2 `! h - /* USER CODE END WHILE */
! ?6 k+ q. ^3 j3 g5 s y l4 t
B3 L3 W9 _4 M* ]7 Z- /* USER CODE BEGIN 3 */
2 a5 s3 u$ W7 H( p - 4 e+ O: q/ J( b/ \- b
- }9 W3 D2 |& m! u% C; ~) {/ U8 Y
- /* USER CODE END 3 *// k+ @7 }" f' Y9 \8 u
- : Z) c A) {" o
- }) t9 l( B" w& \9 z# H1 R" i/ r+ N4 x
- ( k. C$ p1 G) s ^" |$ f
- /** System Clock Configuration
1 L6 i' Q/ }& J: L* j$ n; y- z - */1 S# B, K* f# ]& [* P
- void SystemClock_Config(void)
J% l! s) K0 f1 M6 W9 u - {
7 R5 l' N$ S8 ~; \! e! `3 ^0 f2 {
+ Y3 G" R8 D1 O2 l7 o4 z- RCC_OscInitTypeDef RCC_OscInitStruct;
- G4 s8 h. v/ S% U' a - RCC_ClkInitTypeDef RCC_ClkInitStruct;
% w1 h1 o8 `* @( B2 n% { - RCC_PeriphCLKInitTypeDef PeriphClkInit;+ b& }7 F' ?2 W0 n/ d, e
8 l' I4 P7 ?) [8 [4 f- /**Initializes the CPU, AHB and APB busses clocks
5 g8 T1 H" q$ k9 C# U7 } - */
$ b! }" f3 a: P9 n. H, q - RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;/ P( Y: c- U/ c8 k- _$ E
- RCC_OscInitStruct.MSIState = RCC_MSI_ON;
! y! P* D$ X1 b# E0 |( a - RCC_OscInitStruct.MSICalibrationValue = 0;
9 n4 S( q2 k( j3 j |9 j" }7 U - RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6;
9 Z3 K; g# x% f5 o' z - RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;6 h0 u8 q) @, Q2 E, d8 ^7 ?7 v$ |
- if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
/ m6 m) F3 m0 L8 J6 J6 n2 ? - {
- u- w* I4 M% t5 x9 p. Y. q - Error_Handler();
7 L: P6 G* t: s5 P7 l - }
2 D! p- G/ ^$ x - ; }3 \) V& m- s) H. i
- /**Initializes the CPU, AHB and APB busses clocks
5 ~2 O5 t$ Q; x1 Q) y8 D - */
; J4 Q2 @# H$ Q9 ]5 n. o - RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK
' F; ^" w. k! W# ^* `0 f3 D - |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;( I; A+ R3 ^8 b3 w- g
- RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;: x5 K2 Z, r- ^% ]4 E+ [
- RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;1 s5 G! n% {: s& g, G* K1 M
- RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
0 m" R' \/ a) J- j% e% |8 c$ _' n - RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;2 L" ^9 F4 D0 P1 h2 C/ ~! O0 P) f, n
* m$ j0 O. f! r+ b6 ?- if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)0 d* W1 u) H# p; i+ C+ r
- {* T+ x+ A4 y" I0 ]
- Error_Handler();; `: U( r" b, ?: Z3 u# U
- }& Q. N1 Y9 |7 h n' X: I) W1 T
- 7 }( {$ C; a7 K; @: c+ r
- PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2;
* d( v: ^) I8 }- j6 ?8 x - PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;, M8 G8 |9 {3 t; U2 y2 e
- if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)8 a7 C* ~& g! d, y4 Z& I
- {1 D$ }8 c+ f7 ^: [, S& x
- Error_Handler();
$ q1 ^: N1 q* N! h+ ?7 G2 F7 U - }
8 h' t. J* z' J! A - # y! [( y* v* l" E9 D% \
- /**Configure the main internal regulator output voltage
* K+ f- m2 v0 ?, m5 @ - */- a% d6 P* ?6 U9 x, V4 U
- if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK)
9 X q/ ^& h& b - {5 g7 C8 Q* ~, x8 X) q4 i* `
- Error_Handler();
( v) m6 ] s9 J. U% _* D( J - }
- Z0 F: p# \8 R. j* T/ `* k7 \ - / Z5 z* D; o6 }5 W# `6 o
- /**Configure the Systick interrupt time " c2 `5 ]. L b1 Q& C0 e
- */
, O# ]* R; ~- ?$ w5 _# y0 \% s0 m6 P) u - HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);) [9 s$ r6 t) K1 J# K/ A2 \7 m' M$ t
( `- q, y( f' @5 V1 j! u" l: q- /**Configure the Systick 4 I) w! H8 [: g/ x! }4 z1 D
- */
+ O6 ?- Q' T6 c9 L1 j- Y - HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);% x. x. e- Y8 F' o$ g
- # G/ L' h' b: H/ m9 a0 S+ [
- /* SysTick_IRQn interrupt configuration */) l1 Z* ?% s, ~# t, ^
- HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
$ e0 `3 {4 [3 o' Z) e5 c9 j, h - }
, z2 L9 _# A# H4 q
0 V+ A; s8 v4 Y! p3 U2 k! Q6 y- m- /* USART2 init function */
8 {1 k0 c% _" h8 Y3 J - static void MX_USART2_UART_Init(void)
% r3 J- M* M8 N5 Y% I - {9 z! o* o7 W( Q' x+ l
- 8 R$ p8 _! U5 z. ?! W3 j
- huart2.Instance = USART2;' H+ ^4 o# U, l* F0 X4 {
- huart2.Init.BaudRate = 9600;
' v' o$ s6 `$ f# b9 J( b! k - huart2.Init.WordLength = UART_WORDLENGTH_8B;* F3 l- O' H. N3 g% w* U
- huart2.Init.StopBits = UART_STOPBITS_1;$ `% P# g% ~. t! y g) s4 {0 Z
- huart2.Init.Parity = UART_PARITY_NONE;
! b# P6 d6 n/ y. R0 g( C4 Y2 }- z0 A - huart2.Init.Mode = UART_MODE_TX_RX;
3 E; Y) d. i* M: a( G0 o - huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;: ^& l4 i& e' r! w
- huart2.Init.OverSampling = UART_OVERSAMPLING_16;
M$ m5 ~# C( Q6 M4 U# X1 p- y - huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;6 y0 A) O3 n ]3 x
- huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;
4 O$ Q p! V( g - if (HAL_UART_Init(&huart2) != HAL_OK)- c# o. a0 Y5 Q! `# Y [
- {7 `( ?% v5 S0 h- Y
- Error_Handler();
! ?& @, S! G7 S! ~6 _ - }, D3 b+ z( j5 v
- & m% O. V5 i5 H, `
- }
8 h; {1 z B# g* M0 C2 t
S' G+ w, \# g2 Z* j- /** Configure pins as 7 p% |' o9 j% Y% j. _
- * Analog 5 W5 @2 p1 n# ~" W
- * Input % ?- i) f7 R$ Y, S+ U
- * Output
7 r+ l: ? E7 I& v# c6 g) C - * EVENT_OUT: Z6 I `( }4 y3 E9 v
- * EXTI, D7 o/ T# _8 ]- w0 i( o6 N9 p6 C
- */
7 s6 _+ U# m" s- r& P. L& x - static void MX_GPIO_Init(void)( l( z/ [1 N4 _* V+ C& B2 H
- {( y( ]! |# R. y4 R2 o$ O2 b
, N' e( E/ D# o: ~+ ?- GPIO_InitTypeDef GPIO_InitStruct;
" D/ N4 r0 ~( |+ P, h - 2 ^5 y1 w. z3 M; z
- /* GPIO Ports Clock Enable */4 Z3 c; }1 Q8 M% f7 E
- __HAL_RCC_GPIOC_CLK_ENABLE();$ S* |& K4 s7 z' e; e3 b! q
- __HAL_RCC_GPIOH_CLK_ENABLE();( P; z# {. d* ?- I3 s
- __HAL_RCC_GPIOA_CLK_ENABLE();
/ F/ c$ k1 `9 V - __HAL_RCC_GPIOB_CLK_ENABLE();
5 Y: h/ ?# c+ _& [- u
: o, b" z/ y( T6 }& [/ f5 G- /*Configure GPIO pin : PC13 */
4 a* T) i, J2 R2 T9 \ - GPIO_InitStruct.Pin = GPIO_PIN_13;
( a& h" g( G) i2 S5 o - GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;5 r) c2 [& {6 o% l
- GPIO_InitStruct.Pull = GPIO_NOPULL;
+ B, \' `: G/ g7 _8 u - HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);1 g; y2 @2 g( p0 B3 Y! `+ z
- ! s6 A. P9 g y! N' {, C
- }
+ D7 B2 y8 o/ E) G r# K
& ?3 d* R2 N0 |5 s6 Z5 m/ i* f- /* USER CODE BEGIN 4 *// g2 O9 q1 C+ J. v6 i- W
- ' a J5 s( Z6 m( l* |
- PUTCHAR_PROTOTYPE
# o! ]: @. K9 `( ?* f, | - {: |$ E* d& A& L
- /* Place your implementation of fputc here */! A2 U: D6 |5 S8 ]
- /* e.g. write a character to the EVAL_COM1 and Loop until the end of transmission */
. \( [- p% S2 b4 i5 O - HAL_UART_Transmit(&huart2, (uint8_t *)&ch, 1, 0xFFFF);
6 k+ a! U6 V. j6 z$ B8 b7 k
3 E" }6 F% g$ n' J0 J- return ch;2 J, f# b- A z5 i2 N& K0 T2 ]
- }* |( D) s7 ?1 D
- 0 l3 H5 }' y+ M3 g
- void DecodeReception(void)
, R8 o. s* @! v1 m - {
9 n; q3 Y$ W# l6 `3 ]6 a - /* Read one byte from the receive data register */
) J: j, n' C: v+ N, \ - temp = (char) RxBuffer[0];" k S2 _8 M! O* }- Y2 l5 y
- RxCommand[RxCmdCounter++] = temp;
+ P1 d* I4 I& O
" H/ k" Y" w+ X3 P- /* Check if is an LR/CR character */
0 G7 s- i7 ]0 K1 A* e$ M. j - if ((temp == CR_ASCII_VALUE) || (temp == LR_ASCII_VALUE))
1 J0 Y9 q) a9 n7 }; C; ^ - {
& {$ K7 E e4 v) [$ E2 z - /* echo entered command on terminal */8 I3 Q; s O# t. h
- printf("You entered below test number:\n\r");
' G' G% O) `, h/ u. i( i - printf(RxCommand);
! t) `$ }# z* ~* c) K: b" v - printf("\n\r");3 ~' L$ b" E& s) D) V U
- $ C( N* T6 \# ?; o& v4 Q
- RxCmdCounter = 0;* G- P% i) u. C: g: ^3 t+ G8 X C
-
6 ^0 Z9 A% T* U# w. U2 ` - ReceiveStatus = 1;
F1 A" g& {% C& a* T* j - }" h0 ?6 l7 v+ i: Y; a
- }. u8 x! L' ?0 S- S) M
- ; l6 K" }+ u! |7 @" |
- void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)
# V+ x4 p' d: Y7 F" A) }) y" X9 [* B% o - {/ U1 X5 I2 i7 S6 r, @
- ReadyToReception = 1;2 Y( J, P8 ?& G. R2 k" N& M3 Y5 D
- }0 a R% ~, e) a9 W& J8 K
' F$ c! z0 u( F T5 h4 Y- void SystemClock_2MHz(void)
% z* {% {) e& S/ M# L, Y! N - {
2 T' k* O+ w* M* L6 z - RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};/ I0 P1 h: ^4 E$ k/ H; S* x
- RCC_OscInitTypeDef RCC_OscInitStruct = {0};: ~9 e' J1 _" D# r
- * B/ p& |8 v7 `; _9 m
- /* MSI is enabled after System reset, update MSI to 2Mhz (RCC_MSIRANGE_5) */3 i, H6 K& U( r
- RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
7 {) f* `7 q9 g+ C/ E# b - RCC_OscInitStruct.MSIState = RCC_MSI_ON;! U2 O! n5 ^7 |
- RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_5;
( _8 S3 l) w8 c3 M8 s8 i. c2 m: F - RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
8 E! s& t) r$ s8 |4 ? - RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;& t# A* t8 \$ ~& |- D. m
- if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
1 {3 `0 }! [9 e+ F3 ? - {
4 I; X4 `- `& m! g* m' O2 x - /* Initialization Error */
& S2 R* z" U7 {1 m# `! D - Error_Handler();6 f L. c" v- m3 j% B
- }$ @3 M% Q+ H3 B; q! Z0 z; A
-
' p$ H6 s9 o' P1 z - /* Select MSI as system clock source and configure the HCLK, PCLK1 and PCLK2 & [* O" d t; V4 [& }" a
- clocks dividers */
w: i5 R3 |/ }, P3 M - RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK;
1 I; ^, R1 l8 G \- ]4 { - RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
2 Y6 r& ]: x( P, g1 Z4 D: J - RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
0 |: U' h l' S, j2 w7 ]$ ` - RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
( Z+ m: f8 E4 U - RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;: A3 s q( b- Z& x# r; C0 u
- if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
/ t/ X2 ?3 z- [& B - {
9 O1 T* b7 s* d - /* Initialization Error */
1 ]. ^# |: q! R& ~3 q - Error_Handler();( O, u! C c. a( }) @
- }2 K* w0 ]7 W# {. x
-
. P; W8 P5 I6 |* A, L) Q - }0 B, {# t4 o% ?, l
$ E( ~5 [3 s; r/ k8 W- void GPIO_AnalogState_Config(void)
! R4 M! c# w" j. d - {
~ R3 w0 `$ t% w& ~" }0 n2 u - GPIO_InitTypeDef GPIO_InitStruct;
+ q3 ~8 E$ E# D9 F -
% C* l3 }1 s, i( _ - /* Set all GPIO in analog state to reduce power consumption, */% ~1 Q3 M$ f* f. g
- 9 y3 C* J1 h/ ?& K4 i( W2 \
- __HAL_RCC_GPIOA_CLK_ENABLE();% Z7 q3 S# {- G! G8 _( ]: f
- __HAL_RCC_GPIOB_CLK_ENABLE();6 [6 p* ?% i# N1 i
- __HAL_RCC_GPIOC_CLK_ENABLE();8 p8 c: p0 E3 n% Z# `' j
- __HAL_RCC_GPIOD_CLK_ENABLE();: b) h6 I# }' z( `+ v3 Y: S0 }+ X
- __HAL_RCC_GPIOE_CLK_ENABLE();' I8 x0 O/ J+ J+ R+ D0 J1 \, Z
- __HAL_RCC_GPIOF_CLK_ENABLE();8 O# \. h$ ~9 ^0 `, o% O. d: y$ v8 g
- __HAL_RCC_GPIOG_CLK_ENABLE();
3 U- M& R5 e2 P0 d: z - __HAL_RCC_GPIOH_CLK_ENABLE();
0 W6 F, K3 o3 j9 S
: O" C' k- [% p4 V8 k2 {- GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
. a! J: }$ Z, R$ p( L - GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;4 O. y: v* J- K. m* Z0 k g
- GPIO_InitStruct.Pull = GPIO_NOPULL;8 S* c" e4 E; @5 @& K1 R8 q
- GPIO_InitStruct.Pin = GPIO_PIN_All;
. q6 y/ y K( f7 E
6 a; ~, h: ]9 B4 w9 f- HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);1 U% J8 ^: g) V
- HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);
' g5 |3 W5 S) N x - HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);
. q* d+ A) m+ w - HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);, z' u0 |/ a9 r& _+ X
- HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);* g% R" z( Z+ X. \" g7 K
- HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);1 r+ n. k) v S: b% b# ?% ^
- HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);4 g2 S. A# l) `2 k
- HAL_GPIO_Init(GPIOH, &GPIO_InitStruct); 8 H$ ~ C% T1 i$ \2 R' {2 ~" D- q
+ T: f, y- m& W& r; {5 Y- __HAL_RCC_GPIOA_CLK_DISABLE();- m* t3 T6 z7 n0 Y. h
- __HAL_RCC_GPIOB_CLK_DISABLE();4 L6 u. {$ b3 F$ R" f8 @
- __HAL_RCC_GPIOC_CLK_DISABLE();
$ i+ O6 B- J3 A- S9 m - __HAL_RCC_GPIOD_CLK_DISABLE();% U/ w+ H9 v$ P5 v
- __HAL_RCC_GPIOE_CLK_DISABLE();, [. A/ _: x3 }2 ]/ z8 [
- __HAL_RCC_GPIOF_CLK_DISABLE();
4 W+ u$ d7 L Q+ T* [+ O$ K: _ - __HAL_RCC_GPIOG_CLK_DISABLE();
; k V) z% A" G& N; T! Y - __HAL_RCC_GPIOH_CLK_DISABLE();, v. @8 q X% |1 j$ H9 g9 e9 Z: N2 ]
- 0 r0 [' b3 w3 ]$ G; [, ^2 n
- }. V" {& X4 Z; T G- m) C
- 4 t3 i. P+ z U
- void LSE_OFF_Config(void)0 q# a' Y5 W9 E0 C1 h9 a9 {* [
- {4 a5 |! C' X- z; e" G
- RCC_OscInitTypeDef RCC_OscInitStruct = {0};
9 ]8 t4 U7 |* _4 c
/ o; X& F9 [3 ]( a' ]! y- P- /* set LSE OFF */
7 P% {# n1 F4 i; b' \5 |. { - RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;5 D8 m1 n5 w* R% ]
- RCC_OscInitStruct.LSEState = RCC_LSE_OFF;
' Y3 j4 V! \( ^$ { - if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
4 k! R5 A. I$ A% j1 z, w; Z - {# a( Y- T. [2 b+ ?; Z$ k9 m$ u$ |" G& j
- /* Initialization Error */
* ]$ a2 ^! N8 P9 U/ `0 A& n9 Q - Error_Handler();
, P {3 d$ l: M7 t: n1 r - }
z3 l. q4 A9 q; U2 p
- K, |6 e$ L: l& _- W: X8 X Z- }# R- h; v7 P4 {; |) k
- 7 `5 x6 M1 ~( u: [* Y
- : w$ V2 _4 y: z1 N5 s
- // TODO 1: Enter into Shutdown mode# A" o# B' d, @: B
8 J0 r) ^- `& c0 r- ( e# h P, |# S' u& f) f
- // TODO 2: Enter into Standby mode$ o2 ?$ P2 u2 e. R
9 _$ v/ s$ o9 ^2 \8 n; f- 1 Q3 O; N4 j& @- ]' R0 z% d7 b6 ^
- // TODO 3: Enter into Stop2 mode
% X# {8 F; i) x y - 0 ~! p( g! f1 B
- 3 R2 i* _ @; f- @; B0 e0 S1 J
- // TODO 4: Enter into Low Power Sleep mode5 j& O. X+ R) l! x
1 i! ?5 q1 x$ e$ }/ a, i2 i. N6 o- 8 l# \: y7 G8 U6 ~$ o
- " C B3 C3 I( d2 R1 R* W. i
- /* USER CODE END 4 */
; o. m6 A' j+ A3 ^" t
1 K* }. C0 Z2 |# t6 q- /**: j+ n$ S# D0 C3 {% h6 N$ y
- * @brief This function is executed in case of error occurrence.% _# a8 v8 h+ D
- * @param None
4 ~- K( s! T5 n, q6 Z8 p( ~- q - * @retval None5 T1 O' x& E1 p7 u$ m; k; H7 W6 l R
- */2 P" i7 B$ R3 R0 p" U4 F
- void Error_Handler(void)
" t' _3 @9 X- D, L - {
% n6 a. C, x* F8 z; \1 ? - /* USER CODE BEGIN Error_Handler */
( V( L3 \ U6 m - /* User can add his own implementation to report the HAL error return state *// f: ~7 F7 U9 W/ [; R# j& p9 c: s
- while(1)
4 V7 J3 P) b) f& r8 b9 B1 `2 _ - {9 j. F- \0 J' z6 W
- }# R% a3 B/ N& P" T" y& P
- /* USER CODE END Error_Handler */ ) W. s3 A/ H5 Y/ H7 }
- }
" \4 O+ }$ m( A2 Q. }. ~6 [ - : M- n& c+ q% z" V9 N, M
- #ifdef USE_FULL_ASSERT
0 c7 Z: W2 G( D2 i
* Y. T0 d2 A. z1 e% j- /**
0 K+ R5 V3 J$ |& `! f - * @brief Reports the name of the source file and the source line number
s1 L$ g/ t% q: } - * where the assert_param error has occurred.0 f* T7 S2 o4 s" R( n( T
- * @param file: pointer to the source file name
3 E, I0 f! w; _5 @# ^8 X - * @param line: assert_param error line source number5 ?% ]) ~4 z9 e& Y! f+ w
- * @retval None
$ W' R' u! Y0 B5 |1 L5 J/ C8 ^ - */8 N+ g+ H1 h8 A4 R A! g
- void assert_failed(uint8_t* file, uint32_t line)
2 ?7 P2 H: L* e4 k8 i - {8 r2 }3 c! z8 `! v% I2 U
- /* USER CODE BEGIN 6 */
* w2 @. j' F1 \" [* U7 u - /* User can add his own implementation to report the file name and line number,
7 X" a" W2 w- i6 H& z0 {( X - ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */' |- t+ p. i5 ]
- /* USER CODE END 6 */
( y' j% ]6 o0 m% t8 d0 X - . u& w& F7 y6 w( K* o$ @& _
- }! }" H3 }8 T# C* ^+ S
- # G6 c$ s' y& u' [
- #endif3 i! @1 Z# p/ u, H/ w
" g# W1 o1 }) @7 O: O- /**
?/ x) f$ V0 L9 l* a2 R& `, m7 ~ - * @} F" q: G5 P# f: {( x
- */ ( }( t4 ^9 F) o2 ?. u& l! w# |0 n
- . m+ E: R. Y0 U
- /**
+ R) }7 [5 B6 L6 W) ]& {, b. ] - * @}
& L6 c0 U$ s) o8 j$ n0 `! J" Z$ K+ u - */ * V/ u6 G( o* p' D7 N: W9 }. E
- I3 A! O7 U! R# W d# z+ P, E0 ?; `
- /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
Z2 O$ I( c! Q3 y) ^0 b8 C
复制代码 上面是修改之前的代码。8 |+ {1 p- X& ^5 C
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):
" @: |; }# C1 n1 V4 S* j
; V/ }3 G7 W# c& m. f; r/ ?/ ?. m2 G- n. t9 A5 z0 q
大家也可以根据帖子里共享的ppt思考一下补全代码。
# `: ^# s. t. |$ j/ c+ E, F" }$ V. ~2 z
0 \9 P! Z; L7 p总之昨天学到了以下东西:
$ B$ w" M/ q7 G9 K. j- P1、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
8 }: o H" r$ m" j& D! p2、能够使用CUBE MX配置工程并生成项目代码
1 b5 T \. e; x! A; \$ f3、计算理论功耗,测量实际功耗并对比
5 K, r! \' }3 a0 Y- M
: `4 C3 u: M- P _0 F+ K收获满满的一天,下面把学习的资料分享给大家:
' U7 R( c6 n* S# v& b+ T! m) C" V+ t" A( D# A) a( E) v
( x% m2 F* L: y4 u" r
" n! `4 B1 W6 s6 j2 k4 Y
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