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”。
# R8 {+ s: V( }4 r8 O4 `! c 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。6 G) l2 k3 m5 F4 j; B3 c
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。" t+ s4 y( ]# E+ f
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/ X% [1 O/ F% M' Y9 e) t2 I 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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5 Y$ l9 j" @! e! J! S* r) E( r 一、ST MCU Finder
3 @5 {9 |: Z. l3 r 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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) h% l3 }! `1 Z0 O8 q上面的是图标,下面是软件打开后界面:
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3 s/ U* w- }. W7 y( n 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! w3 d. l4 o% j& N' p6 R, A
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二、STM32CubeMX, e' h5 i s! W+ m* Z G
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。
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& | ^- `8 h! d5 |) d# v4 O1 x上面是STM32CubeMX的图标,下面是使用的详图:
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+ `8 b. s7 I* v以STM32L476 nucleo板子为例,创建一个项目
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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。: A! ^& s! C9 A! d0 m; X
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三:常用的网站及公众号:. f6 |- |! F2 q8 f! f1 C3 @
STM32社区:https://www.stmcu.org.cn/& E" x+ t- D- c( l% S5 v
STM32中文官网:http://www.stmcu.com.cn
, f, T6 L# e1 O' q7 V+ ?1 Z1 C STM32四轴飞行器教程:https://www.moore8.com/courses/course/1308
' N2 N/ c5 E8 E7 {# e 公众号:STM32单片机
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- P1 Y. V& Q5 A7 c 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:5 U, S- Z% h* K1 l( @5 R. X
1、在低功耗案例分享中学习到的东西有以下几点:0 N) | ~6 o6 _% n. `9 W- B+ I
#、影响低功耗设计的几个因素:
+ Y* `" {' q4 p* h *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& t! ?9 O0 ^, x& y
*晶体管数量不同:这个是显而易见的一个因素& T3 a+ c! [9 ^! A( c4 C
*模拟外设的使用:模拟外设相对耗电量比较大
: b2 X; [6 a& M0 n *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+ S: o) @! q! K4 ~1 W+ a- W
*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2 n" y7 H; m* c3 X2 E. `
*时钟频率:时钟频率越高,耗电量越大" M% w0 T" {! l8 L9 ?0 @
*工作模式:不同的工作模式耗电量不同,这个是显而易见的
7 f/ Y% {1 |9 c5 `/ w #、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
1 f2 j5 ~' \. j/ w9 r #、L4系列独有的电压转换器,可调时钟源,SMPS等.$ i" u) A' [8 ~+ k/ A
#、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
0 ~! r: x, V1 j6 \9 }$ _3 E/ S #、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' t) I; v7 Z; k) m' u q" _6 [# {
#、中断标识未清除也可能导致功耗上升$ M1 m T6 F/ X8 f/ \( f" w
#、虚焊等其他情况也可能导致功耗异常6 Q8 R5 p4 q7 c' N
#、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
7 ^/ r/ U/ N2 G #、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
9 t/ Z1 F( V7 ]1 p) w" ?; K #、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& ?, L& T1 @3 H: M' N V. E0 P
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 _! Y" Y( ?8 C. s+ ]" y 代码如下:, }2 W4 c+ H1 U: k
- /* Includes ------------------------------------------------------------------*/) K/ o! m/ h! I( X
- #include "main.h"" U7 n9 X( ]0 f9 ~$ X X
- #include "stm32l4xx_hal.h"3 ]' I* v& g; _
- & ` A7 G; V! C& V
- /* USER CODE BEGIN Includes */6 P1 C# }+ k, @$ f7 I# C
- #include <stdio.h>; P4 f' w6 {5 T: \
- #include "string.h"- z2 y# v' X) J+ ^
" X" F- ?& D$ C. Z" e* T% _& X% J e- #ifdef __GNUC__
, o; I6 ^3 a7 {5 p% F1 A2 W$ h - /* With GCC, small printf (option LD Linker->Libraries->Small printf
+ w; G4 V( V# e. O - set to 'Yes') calls __io_putchar() */
) W6 f) U( t& M2 `$ l# v - #define PUTCHAR_PROTOTYPE int __io_putchar(int ch)
+ l" G) d3 r7 z% E/ z& v& t3 A) s - #else
9 U7 ?$ [& ]3 @3 Z( T - #define PUTCHAR_PROTOTYPE int fputc(int ch, FILE *f)
6 L" H2 Q; r3 d& r$ l, N% ~ - #endif /* __GNUC__ */
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- /* USER CODE END Includes */& ?" J* e& Y, _+ y
7 I5 X: g: ?$ k- /* Private variables ---------------------------------------------------------*/# W8 D; O* z# K9 x
- UART_HandleTypeDef huart2;$ Q. a2 ?/ G+ k' S3 k* Q8 y
- # z, J8 t/ M1 N' P/ j
- /* USER CODE BEGIN PV */7 G9 W% L, e S/ V3 I+ z/ Q
- /* Private variables ---------------------------------------------------------*/* p5 a: a9 t2 w3 u8 I% Z& A% A
- __IO uint8_t ReceiveStatus = 0;2 D0 ?% I8 x' B+ B; X2 e, P
- __IO uint16_t RxCmdCounter = 0;! K+ E" V2 c8 a7 E% }/ D
- __IO uint8_t ReadyToReception = 0;
0 N, A+ @9 k$ b% i4 v - __IO uint8_t CmdEnteredOk = 0;2 Y* x- ^- [& V7 E
- 9 |4 B& ?8 U0 B
- #define LR_ASCII_VALUE ((uint8_t)0x0A)6 r/ P% C; O( E2 R( U. E( ?# n
- #define CR_ASCII_VALUE ((uint8_t)0x0D)" z% y, J1 F, d) g$ u% V3 I
- #define RXCOMMANDSIZE 0x20
8 Z$ l3 V$ f: J/ t4 C1 w* P - #define RXBUFFERSIZE 0x01, O, T3 b, c. Y% t$ R& q/ f9 w% R1 w; J) ]
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& [3 |# p9 v4 g: d$ P- char RxCommand[RXCOMMANDSIZE];
3 o4 c' L s% p" a+ N f4 @ - uint8_t RxBuffer[RXBUFFERSIZE] = {0}; //transmitting byte per byte9 b1 ^; T0 I( `" O# P8 {
- / {$ V$ [ q& X" i9 S" T, E
- char temp; //initialisation character1 f+ P/ @. u# Q
- char * s;- o( a" Q) n1 m% F7 N* t) h% B
4 {% _( b) U/ J- Y- /* USER CODE END PV */
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- /* Private function prototypes -----------------------------------------------*/) }; s8 Q& ]7 A7 B
- void SystemClock_Config(void);
. m2 ?# E$ j- S/ ] - void Error_Handler(void);
5 r4 r3 n( b$ M" S1 L' V - static void MX_GPIO_Init(void);/ w) D/ w! o) R: j
- static void MX_USART2_UART_Init(void);
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2 q' l. g# }5 z- /* USER CODE BEGIN PFP */" N# z7 q' L. k5 U' z' O
- /* Private function prototypes -----------------------------------------------*/
+ g! S/ t1 {& ~! ? - void DecodeReception(void);
- w6 r9 }! G# W3 M% N: k - void LSE_OFF_Config(void);
7 P' C4 i8 ~ }$ T% e0 S - extern void test_shutdown(void);
* u! F/ x# B* Q - extern void test_standby(void);, m; e. X" ^& f: p2 a4 H: M; {$ }# ~
- extern void test_lpsleep_2mhz(void);
, }! {/ D% [% { - extern void test_stop2(void);: b( C1 c- Y, a5 b. q: o! k
- /* USER CODE END PFP */
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- /* USER CODE BEGIN 0 */
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- /* USER CODE END 0 */) {) ?! r i& c& i: I6 e
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- int main(void)
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+ i9 E1 ? ^8 J9 |- /* USER CODE BEGIN 1 */
- P& u4 W4 h: _ C( n1 s( R* z' V
9 i# T) W; L3 l. i) g4 M- /* USER CODE END 1 */! O1 G3 `7 {/ J' {/ |: V
; G4 y8 P; m, C; N- /* MCU Configuration----------------------------------------------------------*/* \8 X8 g$ f; j' y
$ I; o9 C3 F1 l" V+ ?- /* Reset of all peripherals, Initializes the Flash interface and the Systick. */) n# x( k1 ]( p5 s5 p2 J
- HAL_Init();. t* q& a) a: T! Z- l
5 v; ^* j4 Y7 C; n" ]( ~- /* Configure the system clock */2 `1 _" x* M+ u% G$ Y
- SystemClock_Config();
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- /* Initialize all configured peripherals */
3 U, I( z6 _" T) ?: u/ h - MX_GPIO_Init();6 N; l v/ v8 J6 T7 y: v
- MX_USART2_UART_Init();8 ^/ X$ n7 Q! S* v1 O: z0 G+ }
7 B! d; `+ r# Z! Z$ K- /* USER CODE BEGIN 2 */
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- HAL_Delay(1000);//delay 1s* ]; J4 G4 J e! y; `# q" ]/ i# s
. l+ D# S/ [- D% _- /* Output a message on Hyperterminal using printf function */1 r5 h" S% X" O: y
- printf("\n\rREADY\n\r");
, n% }+ T5 C; E0 r+ @8 _ - printf("Please enter the test number according below options\n\r");7 G7 @9 S/ D6 Z7 I; {: k
- printf(" 0 (SHUTDOWN) \n\r");
7 S0 i" K8 E# \ - printf(" 1 (STANDBY) \n\r");
+ ?7 O1 r6 h9 b0 x& A8 ^ - printf(" 2 (STOP2) \n\r");0 u/ k/ g5 f- o. m: F: K
- printf(" 3 (LPSLEEP 2MHz - FLASH OFF) \n\r");9 G( T; n$ Z0 E- ~( O$ N
- 9 F6 `" @6 P$ w+ V& T1 Y8 o, A
- printf(" --> \n\r");" m3 U' [* b( @$ c6 e" u
-
& _* _: C" j* G/ K; H$ Z+ R) `' l8 m - while (CmdEnteredOk != 0x1) {
# q( n3 v2 T8 Y% Q" V' u4 p - ReceiveStatus = 0;
( K" N4 u+ ]- }7 `/ p! \- j - while (ReceiveStatus != 0x1){) L/ f$ i8 d! l9 y. o1 E
- /* Start the USART2 Receive process to receive the RxBuffer */
) V1 e" h: B1 n - if(HAL_UART_Receive_IT(&huart2, RxBuffer, RXBUFFERSIZE) != HAL_OK)0 t( `( f) r5 U, V6 Z
- {/ p* P5 P' w0 o; A' r8 B
- Error_Handler();# j1 {; G! g; N1 b5 x5 W
- }4 S! E' z B, v1 T; O K# G9 x
- while (!ReadyToReception);
8 M" p5 [- i' u1 V; \9 \ - ReadyToReception = 0;# v1 `; Z4 H5 q- k' R4 f( _2 _, A
- DecodeReception(); ) C0 }6 t6 e; k9 [
- }
( X, G, ^0 l% w1 ] - CmdEnteredOk = 1;
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- s = RxCommand;
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- // __EFF_NENW1NW2 __ATTRIBUTES int strcmp(const char *, const char *);
8 L. I! v" ]6 C4 U3 Z - // strcmp(s, "x\r") ==0, input char is x\r, it is true
9 H' r1 Y& ?/ T9 h -
% {$ j4 d* k- m h8 i* \5 V- V - // TODO 5: If receive char "0", enter into Shutdown mode
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- // TODO 6: If receive char "1", enter into Standby mode
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-
; _- {7 X! K% M1 S - // TODO 7: If receive char "2", enter into Stop2 mode
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-
# p4 o1 g* W" C! F) f - // TODO 8: If receive char "3", enter into Low Power Sleep
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-
: w, M+ x- T2 s" _ - else {. ~3 K! c5 u* m5 t5 n5 Y7 F
- printf("Invalid test number.. Please enter again\n\r");
2 u# M; R( N8 o - CmdEnteredOk = 0;$ E* A3 [ x% Z
- /* Reset received test number array */8 c+ J: r7 F3 q8 w- i& {2 ~
- memset(RxCommand, 0, RXCOMMANDSIZE);
; _9 I" S. k* I8 \ - }
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- }
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) I+ ^( ]* f+ o, k1 {" _ - /* USER CODE END 2 */
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* X! D9 d6 B; W% G- /* Infinite loop */
N) ?/ J8 \% s - /* USER CODE BEGIN WHILE */
! B3 p" p5 u( V7 {" q* R - while (1)+ c: m; ~; a. f) j2 W u( q! T
- {- B, c: O v& k9 }2 O/ k
- /* USER CODE END WHILE */
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' L9 X6 L8 L. Z/ B* n4 ?- /* USER CODE BEGIN 3 */) E3 I% e1 I' t k7 s6 J; H+ i) u) l
- 7 n+ l% Y/ J0 a* U; S, k
- }
* b( {- }/ F4 V - /* USER CODE END 3 */. v% w0 E8 l- f2 r) Z7 I0 a! I& q$ O
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2 x& j$ v5 @# m* _- /** System Clock Configuration) r+ X, ]' E& G; P1 M B
- */+ G% S6 x$ _# P: J" `5 F
- void SystemClock_Config(void)- t2 l2 N J H* C7 C, w
- {
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1 }5 m( z& k, X/ o' _6 }- RCC_OscInitTypeDef RCC_OscInitStruct;
! X' W: h) Z! ~/ x2 a - RCC_ClkInitTypeDef RCC_ClkInitStruct;
6 A9 j7 V {; q - RCC_PeriphCLKInitTypeDef PeriphClkInit;8 m9 j3 m4 F) M/ x) G8 \ `+ [% t
! h0 p$ [, B! }/ s- /**Initializes the CPU, AHB and APB busses clocks
C C8 g8 U' M: L - */
+ _4 N1 f- C/ E9 ^/ L: a: ? - RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
% k* R: e# E" H2 m2 ] - RCC_OscInitStruct.MSIState = RCC_MSI_ON;
) A$ m1 x5 ?& `2 _ U - RCC_OscInitStruct.MSICalibrationValue = 0;" U$ o0 l5 R0 v' u
- RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_6;8 K5 a0 I6 @0 j/ ?9 y
- RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;
. j; G i' ~5 C/ U+ r4 t - if (HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
+ T' t: E% g8 L3 S - { J6 q' l8 ^) O# ^
- Error_Handler();
+ E9 {2 {) a& k+ L4 e' W - }3 ]7 g+ ^, }3 H7 T, ~5 W0 q5 A
& l1 b. |. n, L2 w* e6 a0 a7 L0 p- /**Initializes the CPU, AHB and APB busses clocks ! n7 U7 t% A6 P, F* b& I
- */( j/ W1 { L2 p! [: }3 N
- RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_HCLK|RCC_CLOCKTYPE_SYSCLK4 h) ?# d0 y2 L4 x6 F7 H! a# m
- |RCC_CLOCKTYPE_PCLK1|RCC_CLOCKTYPE_PCLK2;
& u/ Q: `; A- x6 G' |& t - RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;, g; n$ m) ~# i$ R2 |. O4 l
- RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
5 X5 i0 L5 i9 E, k' J4 b7 X- F. z' v2 U - RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
; ~' y% ?1 E: j& e; ^ k - RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
& m9 R0 S* e* t - . j; }5 x% z% M! Q
- if (HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
+ \. B! k z- ]3 D0 O- ? - {% _$ b/ ^ i/ D- _) r4 z
- Error_Handler();
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- . L" C8 j. J/ G, g9 _- u/ v5 H/ X
- PeriphClkInit.PeriphClockSelection = RCC_PERIPHCLK_USART2;0 n/ _0 p4 h6 w; O, R
- PeriphClkInit.Usart2ClockSelection = RCC_USART2CLKSOURCE_PCLK1;# R1 H0 w6 Y$ v& H+ T( j
- if (HAL_RCCEx_PeriphCLKConfig(&PeriphClkInit) != HAL_OK)
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- Error_Handler();
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4 ]4 ~6 t$ N1 _- /**Configure the main internal regulator output voltage
U# J8 s5 @- \+ J' { e - */
: n! K6 X2 P7 q t: W+ r ~& `( l9 w - if (HAL_PWREx_ControlVoltageScaling(PWR_REGULATOR_VOLTAGE_SCALE1) != HAL_OK)
: F5 \; Q2 O9 s7 [ - {# Z. c. @" }9 Y+ N) U0 t2 |* D* B
- Error_Handler();$ Q J3 M8 ]% j
- }! x1 p% ~7 F2 h
- $ q; i4 d4 P3 F6 M4 d
- /**Configure the Systick interrupt time
2 m6 Z5 Z8 A3 s8 j3 G: t$ y4 i, m - */
3 j) P2 a- U, A" l, N7 h - HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/1000);, ] q8 a/ x7 c8 G
4 F2 m, Z b d) P& M- /**Configure the Systick ! b: a4 [# N9 _. m/ F) H) P
- */+ ]4 S2 v; x$ t! m
- HAL_SYSTICK_CLKSourceConfig(SYSTICK_CLKSOURCE_HCLK);
% K Z# V! D5 z8 x - & `0 \$ w/ Z3 F) b
- /* SysTick_IRQn interrupt configuration */
1 t2 ?3 p" d$ t4 O+ T3 k. a - HAL_NVIC_SetPriority(SysTick_IRQn, 0, 0);
( e& @2 L: |7 ~* p/ R8 e- I3 } - } f) p ~3 f# a8 F
- 8 k8 d- g- U2 x+ D6 n
- /* USART2 init function */( Y6 S6 F' ?5 Z. g
- static void MX_USART2_UART_Init(void)
R' M0 [( B; E. s5 W" o - {
6 u k6 m, g) G' Z: }( f
1 p. g& D! F! [- {: f% D- huart2.Instance = USART2;$ n# `$ C5 w. ^: Z4 u
- huart2.Init.BaudRate = 9600;% m4 A3 y4 b3 ^/ j" t
- huart2.Init.WordLength = UART_WORDLENGTH_8B;1 E" K; ? m @' C. C* X. i
- huart2.Init.StopBits = UART_STOPBITS_1;
5 K5 J+ T% G/ @$ e* N0 X - huart2.Init.Parity = UART_PARITY_NONE;) Z9 ~% P5 I6 b3 K& v7 v
- huart2.Init.Mode = UART_MODE_TX_RX;% F# Z: c0 G7 ~. y2 C8 b* R
- huart2.Init.HwFlowCtl = UART_HWCONTROL_NONE;6 K2 Q2 W7 C, b# d% `6 u
- huart2.Init.OverSampling = UART_OVERSAMPLING_16;
9 [0 ]- d" h N2 }2 |; ` - huart2.Init.OneBitSampling = UART_ONE_BIT_SAMPLE_DISABLE;
# u V1 \3 m9 v - huart2.AdvancedInit.AdvFeatureInit = UART_ADVFEATURE_NO_INIT;& b: l7 f; w# |- @7 ?
- if (HAL_UART_Init(&huart2) != HAL_OK)
- z9 k0 U5 D& Q, E - {* L4 ]$ ` |- H d7 i( X
- Error_Handler();3 ]$ a ~5 S4 Q3 M
- }. a; C, Q$ }: @
9 O ^( C9 K# i3 n/ O+ Y- }3 a# L7 N" p! n# H8 w6 ]
- ! P+ g, w5 H2 m5 B' p7 D4 C
- /** Configure pins as ) ^/ K3 }( \; L: h6 J5 d& x
- * Analog ; B4 N$ g1 A+ t2 K
- * Input
& i0 j$ C, z$ B# g, a0 u! _ - * Output
8 j6 q% g: g: v7 R" g( { - * EVENT_OUT* s+ x8 x+ C# c* u# x
- * EXTI
! b! @% [" X+ G - */
1 y9 n3 f6 q3 w" a1 q: [ - static void MX_GPIO_Init(void)) C3 G% A) O8 l. N$ o1 y0 } v
- {- d/ }/ T$ o& N) D
- ! x* r" e: U; y6 B0 D8 M4 `" c: G: r ?
- GPIO_InitTypeDef GPIO_InitStruct;* M: J' \% w/ x! ^ w' @3 `) g
- 0 Z1 Q/ u8 \) u4 R' m. f& L
- /* GPIO Ports Clock Enable */& W& M9 B2 t5 Q/ \
- __HAL_RCC_GPIOC_CLK_ENABLE();
$ G% Y0 t8 e b, ?4 | - __HAL_RCC_GPIOH_CLK_ENABLE();( Y4 _) h9 H$ r' h7 ~+ G
- __HAL_RCC_GPIOA_CLK_ENABLE();
3 @% t: q) ]3 z. M3 L - __HAL_RCC_GPIOB_CLK_ENABLE();
6 b* J8 b4 V1 s0 n$ u/ D
" B) v5 L2 ~) i8 k) V/ L& O) U- /*Configure GPIO pin : PC13 */, _4 a) F% o3 h4 A! D2 t
- GPIO_InitStruct.Pin = GPIO_PIN_13;1 f* K" k5 d& F1 U% N
- GPIO_InitStruct.Mode = GPIO_MODE_IT_RISING;
4 q# ^9 J8 b. z! o) g - GPIO_InitStruct.Pull = GPIO_NOPULL;
# P U' U1 H3 {8 J- y; q2 ~( V1 _) i - HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);+ Z% ^) ]; e* {3 e
- / N) C9 Q( d* ?) U2 `; ~
- }+ W- E' N" L1 t: u- D4 D1 U
- 9 j: G" z6 i- ^+ y: M' `! s
- /* USER CODE BEGIN 4 */
- |, ?! z$ Z+ F - 7 S% f$ G( j# Q7 Q9 L" F* x+ d
- PUTCHAR_PROTOTYPE
& {6 B! r$ u* ]1 y: h( F - {7 I! ]% }% j) D) \$ O9 I% u* N
- /* Place your implementation of fputc here */
+ h3 @& z! ]5 P: i* W% M. l0 \ - /* e.g. write a character to the EVAL_COM1 and Loop until the end of transmission */! e9 y0 z" o/ h+ H! Y$ J6 O
- HAL_UART_Transmit(&huart2, (uint8_t *)&ch, 1, 0xFFFF);
% v) \! E5 X0 w! v Y; u4 I/ r: H
6 T* y( q6 Q0 t4 A4 V( I0 E9 \3 f- return ch;) z* I G3 h3 X" K k: ]% R0 e$ }( K
- }
# l% f8 c! h; X5 j
5 Z/ c! R9 i& f9 n- void DecodeReception(void)
+ I+ |1 J5 k+ d. ~ - {
6 U9 o8 j* M: k5 \9 z) X% i( { - /* Read one byte from the receive data register */# ?4 j6 S" N- F5 m: ]% O4 e* I2 L
- temp = (char) RxBuffer[0];) p7 ~4 N* ^7 N. ^5 E
- RxCommand[RxCmdCounter++] = temp;3 {9 `% E/ V4 C4 z4 q9 E
* _6 p4 ?7 ]- B/ T8 L- /* Check if is an LR/CR character */
! I/ n) M! S: E- B( u% }6 M' ^ - if ((temp == CR_ASCII_VALUE) || (temp == LR_ASCII_VALUE))
0 K u4 s, @2 X3 ^6 [2 p$ q' P* R B - {
# k" x6 g, c9 M) v - /* echo entered command on terminal */- H. i3 P! W2 ~: M/ j. M+ [. y
- printf("You entered below test number:\n\r");
, ]5 y0 W! l! a7 m: T - printf(RxCommand);7 }+ i1 j* \( q v; ~3 i1 i$ g
- printf("\n\r");" [* R p/ v! U" e6 r0 d
7 v: g, v4 }( z$ R- RxCmdCounter = 0;( J6 r# T. |- J" X
- 0 w* L/ \, p. Y9 k* D' R3 `
- ReceiveStatus = 1;
3 O; m6 G1 ]4 M - }6 L" I, g) f' e( B" y5 c
- }$ D- _$ ]" s. \9 N" O, M% U& k0 e9 v
- - c& H: f6 M8 B' g s; m
- void HAL_UART_RxCpltCallback(UART_HandleTypeDef *huart)7 y7 w2 V ^# l" r
- {7 _' l% M2 e3 m: l- S
- ReadyToReception = 1;9 D, Q+ s, ?5 v
- }
" K) n( _; V. }& ~# n" p' \
; n" s- A3 S% u( ]- void SystemClock_2MHz(void)8 P. n1 f& ]- b' e. Q! v3 ~1 R% H0 p& a
- {
+ S9 }1 n4 H7 e# W5 o - RCC_ClkInitTypeDef RCC_ClkInitStruct = {0};
2 m- F$ y4 e7 x: M6 h" o7 o - RCC_OscInitTypeDef RCC_OscInitStruct = {0};+ @3 S) Q1 @" Z4 y& E
0 T/ A3 B5 k; V+ ^: {6 A# r/ T- /* MSI is enabled after System reset, update MSI to 2Mhz (RCC_MSIRANGE_5) */
+ O. J1 b' D9 \$ {0 g: Z - RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_MSI;
, L# [; S5 G. J- [0 |6 J0 N - RCC_OscInitStruct.MSIState = RCC_MSI_ON;# ?8 a8 Z2 a" k
- RCC_OscInitStruct.MSIClockRange = RCC_MSIRANGE_5;. e; b8 J7 w, C% i) P
- RCC_OscInitStruct.MSICalibrationValue = RCC_MSICALIBRATION_DEFAULT;
/ {; {! o1 A4 }) }8 M; U5 o' k - RCC_OscInitStruct.PLL.PLLState = RCC_PLL_NONE;9 n* u2 Z3 D$ F3 s, N! @ a
- if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
0 g! I; D- M- }8 A* O& X2 P - {
# z! A6 e/ ?/ \* S; Z' F6 h! Y - /* Initialization Error */
4 B* ~) T! K4 ~& C' E, U& M" O - Error_Handler();" ]. _6 l0 b' C7 E0 h6 M
- }
" Z$ N' F8 v) X8 K -
# y' _( N& }6 s W* D4 K - /* Select MSI as system clock source and configure the HCLK, PCLK1 and PCLK2
5 h9 R% B/ C% T - clocks dividers */# M$ m3 |0 z: d" R1 V
- RCC_ClkInitStruct.ClockType = RCC_CLOCKTYPE_SYSCLK;
9 L9 S. K1 h$ L, O% x ]1 P - RCC_ClkInitStruct.SYSCLKSource = RCC_SYSCLKSOURCE_MSI;
" x+ Z. \, i+ y) |$ ~; a: O - RCC_ClkInitStruct.AHBCLKDivider = RCC_SYSCLK_DIV1;
( t5 d3 A9 r4 T8 r& G' V- N! B7 u - RCC_ClkInitStruct.APB1CLKDivider = RCC_HCLK_DIV1;
. E! @' a7 n1 c& E - RCC_ClkInitStruct.APB2CLKDivider = RCC_HCLK_DIV1;
4 s6 ]& I, f+ Z. ^4 ] - if(HAL_RCC_ClockConfig(&RCC_ClkInitStruct, FLASH_LATENCY_0) != HAL_OK)
( T& l3 z% z# D# X; W, S+ J$ G - {
( {. ?5 V$ z7 | - /* Initialization Error */' s2 O4 o! O# ?3 C# E
- Error_Handler();
7 {* A' h# T# F$ _$ h4 U - }3 m8 }6 E' C: M9 `1 k: b p
- ) H: C1 H3 i {$ F! \$ }# j b
- }
1 ^" J$ g6 x! H" Y7 U2 k$ z
. O' b H# r# @# V5 M7 W9 C) Z- void GPIO_AnalogState_Config(void)
: C( B2 i9 k# q$ N8 z# O6 f' M - {
& Z% z: f* f9 t+ j/ f, ^, z* } - GPIO_InitTypeDef GPIO_InitStruct;
1 Z2 F) G4 U9 C! I ?1 K! R1 p -
8 \ E5 t2 [! \" v' k8 j, R - /* Set all GPIO in analog state to reduce power consumption, */
( o2 E6 }* e' ?2 u/ O- x2 z6 ~5 ?- F$ o! o -
4 u0 S# b* k$ K1 v: S r' N8 x: T - __HAL_RCC_GPIOA_CLK_ENABLE();! ?# i; s- P ]1 O% M& I$ Z
- __HAL_RCC_GPIOB_CLK_ENABLE();
+ G" D+ ]- J' B# _! A* C* A: w - __HAL_RCC_GPIOC_CLK_ENABLE();
4 e; F% y7 D$ @) c, @ - __HAL_RCC_GPIOD_CLK_ENABLE();
; h3 F, D t- q B k" ^9 g - __HAL_RCC_GPIOE_CLK_ENABLE();
' Y2 G5 C, Y; @$ _- ]4 k4 o - __HAL_RCC_GPIOF_CLK_ENABLE();
( ?0 j; r# {& q2 u8 R6 h, [& P* x6 G0 H$ ^ - __HAL_RCC_GPIOG_CLK_ENABLE(); e, X/ I$ q# R1 N
- __HAL_RCC_GPIOH_CLK_ENABLE(); : g% r2 X' G/ u( v& ~( c6 R
4 Q- A) O9 N) g! O" ^7 p- GPIO_InitStruct.Mode = GPIO_MODE_ANALOG;
& ?. C+ L/ ?, v' C - GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
; u4 l( V i) p B% E- g& |6 n - GPIO_InitStruct.Pull = GPIO_NOPULL;4 b: o: F1 m& C- P4 x3 w
- GPIO_InitStruct.Pin = GPIO_PIN_All;9 G7 A" M9 Z# }& N! I7 x1 S
- : ~/ i7 E. i2 v8 j0 l p2 R5 M" {
- HAL_GPIO_Init(GPIOA, &GPIO_InitStruct);
* W* Z1 W' a( a; `! N4 v3 I$ F- O - HAL_GPIO_Init(GPIOB, &GPIO_InitStruct);8 ]! `# C4 ]) ]# y
- HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);. e8 n# N9 G3 [: ]: e' J" f
- HAL_GPIO_Init(GPIOD, &GPIO_InitStruct);. Q) [& i/ r9 w% Q
- HAL_GPIO_Init(GPIOE, &GPIO_InitStruct);# ]) Q! [/ @ Y
- HAL_GPIO_Init(GPIOF, &GPIO_InitStruct);6 D4 P9 m( t- o3 {3 `6 F$ s. _
- HAL_GPIO_Init(GPIOG, &GPIO_InitStruct);4 _% a9 ]+ b) g2 |6 e0 w
- HAL_GPIO_Init(GPIOH, &GPIO_InitStruct); 6 H' N3 {. `$ d0 M2 [9 P# W+ k
6 Q! n( v; j1 b+ V' a" X( u6 W- __HAL_RCC_GPIOA_CLK_DISABLE(); X8 ^7 |: |& h; S
- __HAL_RCC_GPIOB_CLK_DISABLE();& O% F6 @3 b- C1 H- c% r) |1 Z
- __HAL_RCC_GPIOC_CLK_DISABLE();
6 D1 i: E$ u6 B X; m3 b - __HAL_RCC_GPIOD_CLK_DISABLE();
2 E4 {" C7 ?8 U1 a( c/ b - __HAL_RCC_GPIOE_CLK_DISABLE();, @; @/ {3 u7 }
- __HAL_RCC_GPIOF_CLK_DISABLE();
" {' F( T. {9 o5 V) j - __HAL_RCC_GPIOG_CLK_DISABLE();
0 s* \7 h0 M1 R4 y5 l: V. J6 G - __HAL_RCC_GPIOH_CLK_DISABLE();# W, _5 i# ^' ]4 j- x9 R" `9 j+ r. ?
- 1 v j0 b( ^8 D$ w
- }7 k/ o+ h: D3 _8 ?0 j
- ' ]/ C, T. M: H g
- void LSE_OFF_Config(void)2 Q( U* `' P6 e1 j+ k' k) }) A
- {' A' t; y$ m6 X9 Q: ?% @& ?, h
- RCC_OscInitTypeDef RCC_OscInitStruct = {0};
+ C' Q& |; |9 l
$ w% O3 w i8 v5 b! i3 B) f- /* set LSE OFF */2 X6 L. {) k$ `5 o# l1 t. E
- RCC_OscInitStruct.OscillatorType = RCC_OSCILLATORTYPE_LSE;
; k, \* P+ h$ V' l+ M, P& O4 ?2 s - RCC_OscInitStruct.LSEState = RCC_LSE_OFF;9 S9 e9 i ?' V `, i
- if(HAL_RCC_OscConfig(&RCC_OscInitStruct) != HAL_OK)
/ \. i/ ?+ W1 _3 |2 a0 F - {
3 z9 G/ v6 k' o. L; w3 n: l+ {; v' [ - /* Initialization Error */
1 L$ |! V8 O" ?+ {: i* g6 H0 X - Error_Handler();
3 y) e& ~) { b* B: B! L' B2 s - }
a7 @# d: b3 Y - 2 ^) d: F& U/ ]2 ~5 @3 y3 Q4 w
- }
, X! { T0 q; ], ]4 n - 6 c9 a& I7 X8 j7 A9 {5 N$ s& @
$ q2 _, r" m; o% w* q ~- // TODO 1: Enter into Shutdown mode
$ r& j% `* B2 l: X5 G - . ?3 e7 Z/ Y% X% m2 [% M" J
- & w* k O; P+ `3 Y. {
- // TODO 2: Enter into Standby mode
: z h4 q7 B% ~) g W - ( X6 u) u) G( Z( f
; `. j; F2 I) l9 x- // TODO 3: Enter into Stop2 mode
6 J' Q$ C+ X" w. d
2 I1 c% A$ P5 i
2 z H4 ` S7 _( F; o: {. o- // TODO 4: Enter into Low Power Sleep mode4 a: }+ k; B1 O$ X& _9 }
- 8 s1 W2 U7 V5 D- T- s: S. m
" x6 ]8 @& x8 X5 A; ^
, A. }; s( `& L- /* USER CODE END 4 */! ^' u& g3 K [* w) H" j6 J! Y
- % e. q) B5 B! Y4 ^4 M r
- /**
1 J6 _: X0 p# R! o/ o8 I - * @brief This function is executed in case of error occurrence.9 l; ^- t! w& E$ d" g/ }9 }" Q
- * @param None) k, H7 T# z; j3 p' X
- * @retval None+ o2 j. m5 ~; ~+ p) D
- */ N1 r/ p( b2 V/ w7 N" k* _ ]6 |
- void Error_Handler(void)
7 {- R4 J# _, N2 q5 Z - {* j% ~3 e5 ^2 d; a# r1 c" j
- /* USER CODE BEGIN Error_Handler */ a9 c. Y o6 Y0 Z2 f' O5 f4 O% m3 @
- /* User can add his own implementation to report the HAL error return state */# X" C* y. n& k- T
- while(1) ; @; e: _% ~4 l# l4 m! w
- {
! L' i& w. R. V. ?0 _. X7 r I- O - }2 D- T/ Z5 M* y5 ?
- /* USER CODE END Error_Handler */
- k2 E, P6 @: z6 V6 { - }
- t4 Z6 N" U$ L - 6 M$ }( @, h+ N' ]' a
- #ifdef USE_FULL_ASSERT
( Z3 q9 w+ ~# `0 V6 ? t- U - . i# ^: y; t6 s1 f1 C5 `
- /**
9 M9 _' {. u2 C: ]8 U7 ^ - * @brief Reports the name of the source file and the source line number
/ e; C2 s1 v! E& k - * where the assert_param error has occurred.
( y, k. j/ s+ l! R' r7 { - * @param file: pointer to the source file name
9 t T6 C7 E; O- e1 s - * @param line: assert_param error line source number
! O& N3 q1 {! @ - * @retval None
8 R2 [9 A; `5 X. Y! } - */
4 U8 r4 |+ A! V2 d. y - void assert_failed(uint8_t* file, uint32_t line)" a6 x% N6 k ~7 U
- {- K) _! v! ]8 J" G- k
- /* USER CODE BEGIN 6 */( \' q$ ?$ E' k! ?' f
- /* User can add his own implementation to report the file name and line number,1 k$ A' v& [6 g4 s. K. z
- ex: printf("Wrong parameters value: file %s on line %d\r\n", file, line) */
/ e: _/ q' z0 k1 B; E& u - /* USER CODE END 6 */
' m5 I! R+ |1 `3 V - 6 U9 |' G" [1 j+ x% H6 m
- }
# I7 j6 g# s8 D3 d' n6 H/ V) B0 ]/ F - 8 `5 J: R5 U0 x& r, ~; Q, o
- #endif6 n7 U; N) u1 q5 d2 ]: E/ i% `0 a
# `( s5 d4 ~3 Q3 Y" {3 W% k- /**+ u' r: I; U% R" p
- * @}$ |: ?; j' f, i& k" L
- */
' s" v3 E9 @ r# E+ \& r
$ h- |- u4 O8 F A- N- /**
7 E+ S; _, }" O - * @}) k1 T" _ o. b$ E# [, s
- */ 9 e. \+ M% C% [
7 s- g7 e4 E. c% w- /************************ (C) COPYRIGHT STMicroelectronics *****END OF FILE****/
4 {2 e, n2 g ^+ ?- `5 Q9 ^$ ~
复制代码 上面是修改之前的代码。
& |4 ` x7 l9 R! _$ f0 @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):
6 c6 l1 N' L, y+ x1 c( w
6 {1 `7 h$ D/ F2 @; P6 K4 K J. ^; \$ X$ B2 W4 k5 c' E
大家也可以根据帖子里共享的ppt思考一下补全代码。' K9 V7 b! _, R4 b
* m5 _6 D5 i" m- u- `
总之昨天学到了以下东西:# V6 _( H: X6 Y% k' ?. k
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: E+ f' I1 K; d
2、能够使用CUBE MX配置工程并生成项目代码! ^- Y$ R4 u8 ?: l" T1 d- S) a
3、计算理论功耗,测量实际功耗并对比' e4 I7 g" R& R- b7 A( ^/ w
. k/ A+ r: @. z收获满满的一天,下面把学习的资料分享给大家:' X8 e, `, h" X
4 H H8 a7 d3 L. s3 a/ N* x5 r
, C7 @/ c1 E s" b: l: B, J
, m1 M* m8 S* ?( B/ y8 F
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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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