二值信号量的用法示例0 s, Z" N9 w/ X1 i9 I a8 [
1.创建好带有printf-stdarg.c的FreeRTOS的工程2 ~& U6 R' u' u5 A! n1 ]
8 D0 z+ n5 Q. e6 c" t3 K2.修改main.c文件
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- /* USER CODE BEGIN Includes */
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, [1 }" p1 a& B" E! u* @2 ~- #include "FreeRTOS.h"
4 P( V% y6 }; e( ^2 } - #include "task.h"6 z+ Q4 D7 q9 g4 ?) l; ?( ^
- #include "queue.h"
$ H- b; y7 E g( h/ A, t' E - #include "semphr.h"
$ }$ D c4 Q$ x. P* ~6 y3 H' v4 o - #include <stdio.h>
# Q- p, {! r( G, y' ? - #include <string.h>
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- /* USER CODE END Includes */" t* Y2 l8 s9 l8 [5 x
- /* USER CODE BEGIN PV */$ Z) E6 W* W. Y H u: Z0 `
- ( v& T3 r) ]$ L" N, V+ I4 W/ d
- static TaskHandle_t AppTaskCreate_Handle = NULL;
/ o0 Z; O- t+ E$ }! c: K - static TaskHandle_t KeyTask_Handle = NULL;
; l% ?% A% b: Q# w0 L - static TaskHandle_t Led1Task_Handle = NULL;6 `( G' H$ `4 Z# e
- 6 V2 y) J) R, ~0 K4 v
- /*Create a binary semaphore handle*/
/ c3 a; ?" k- M) g2 D8 K, ^ - static SemaphoreHandle_t Binary_Handle = NULL;4 `- Q+ y' c0 q( {$ s+ d3 t$ m
! @4 t' c u1 W- extern int f_printf(const char *format, ...);
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- /* USER CODE END PV */- c0 ]0 s- S* R5 G2 A+ G- {- ]) E
- /* USER CODE BEGIN PFP */# Y& m$ o6 t* _) C0 q4 ?: k( F
! O# D8 O4 t3 `8 i+ F9 ~- /*Create a task function*/9 u( b' V1 c4 I, D+ h
- static void AppTaskCreate(void);
9 k; @6 |, c; A( N3 M - static void KeyTaskCreate(void);
% v% x6 Z, O+ u, T8 Z - static void Led1TaskCreate(void);
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$ d! t9 Y7 F' C$ T( d- /* USER CODE END PFP */& o5 N9 S8 {* f9 A- D7 z! `/ B) ^
5 v& `: \4 U- A, a2 r5 K- int main()
* C S1 K1 U6 _+ E - {
, ]3 H, V0 v) k# b; p - /*! o! M) p9 k/ ?6 F; Y, W( w; h* Z0 }
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- */ c ?4 g8 W D8 f* |+ S
- /* USER CODE BEGIN WHILE */" J; v9 ~1 _0 H, Z# D1 U6 i/ |1 @2 {
- UBaseType_t xReturn = pdPASS;
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) O6 f3 {- p8 e( Z( l - xReturn = xTaskCreate((TaskFunction_t)AppTaskCreate,8 z2 e! B. d" q
- (const char *) "APPTASKCREATE",4 o& T" V$ n( b- b
- (uint16_t) 128,5 t! r: Z0 o' @, h; x' e% [
- (void *) NULL,
) r9 N, A. A" P8 f - (UBaseType_t) 2,3 p5 N' O, y3 w( b- A. f
- (TaskHandle_t *)&AppTaskCreate_Handle);
! Q" K) [4 ~0 b; Z. Z - if(xReturn ==pdPASS)5 L6 D6 ^8 L' v# ~
- {
4 a; [* b, h( W# h2 u5 I- V! U - vTaskStartScheduler();( n' B- n( u) Y& R
- f_printf("start..\r\n");
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- while (1)
/ M, F9 L8 P8 h9 W - {
; N' \6 u' q( V# [/ i9 I1 s - /* USER CODE END WHILE */
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- /* USER CODE BEGIN 3 */; M2 W8 z) V* ]: u- b* w6 w$ n
- }
5 U i' v& h! l Y4 c - /* USER CODE END 3 */ R- ^4 c+ G& r" ~ I5 j; _
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" {) [ M. I" u) a- c- /* USER CODE BEGIN 4 */4 {( X, y6 e! y/ a
- static void AppTaskCreate(void)7 U% n9 o$ `+ d8 w, |2 J3 i/ o
- {
" W3 _ X1 ?. } s/ E6 \/ Q7 u - UBaseType_t xReturn = pdPASS;1 q( V( r8 d) U2 T4 }4 {! n
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# n! W. P" v3 K- xReturn = xTaskCreate((TaskFunction_t) KeyTaskCreate,
% `, ~ T) i- q) ^ - (const char *) "KEYTASKCREATE",3 E3 W; z# }7 Y1 g; @, `9 F7 ]
- (uint16_t) 128,% N5 M' |+ V. t r4 s" C% m9 d
- (void *) NULL,
, w+ V! V. p4 c3 t% V7 X5 d+ ~. j q - (UBaseType_t ) 2,
. h8 R& V% g8 ~6 s4 P - (TaskHandle_t *) &KeyTask_Handle);' N7 v4 x. E7 N4 C
$ H6 ?: N0 E$ I$ d7 {1 m- xReturn = xTaskCreate((TaskFunction_t) Led1TaskCreate,# ?6 x8 o+ h& `5 i* Q# e( s
- (const char *) "LED1TASKCREATE",; r# S& | C: [( o$ w. _
- (uint16_t) 128,3 a- G" f. H+ |- t' r
- (void *) NULL,
, c6 l' L: _" ~' G5 b - (UBaseType_t) 1,
& x7 e* d) [* o) W$ v - (TaskHandle_t *)&Led1Task_Handle);
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- /*Create a binary semaphore*/
c! q3 Q- J1 } - Binary_Handle = xSemaphoreCreateBinary();: }( A, y3 ?5 H; D9 J% y4 ]9 S4 K
- if(Binary_Handle !=NULL)
+ S! p+ `/ c. p b# X& T - f_printf("Create Semph_Binary PASS.\r\n");* g0 b/ {$ m8 c: q
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- if(xReturn == pdPASS)
) h! ~8 C& H+ Z. P0 a7 F0 T: Z - vTaskDelete((TaskHandle_t)AppTaskCreate_Handle); , `7 I9 Z0 F7 z/ B' o( n/ ` P6 d' {
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- t0 {* i) _& O6 Y+ j- static void KeyTaskCreate(void)$ u" E$ A: H& m0 ]5 t
- {
+ l' o4 m j" W# V, E" a2 ^, F - while(1)
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* m- X. {5 a' ~ - UBaseType_t xReturn = pdPASS;
1 Z% t9 q( ^% z0 R - if(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_0))& {: q0 d7 }6 y( [- W
- {
0 f4 `' F9 S7 c- {& o - f_printf("KEY TASK PASS.\r\n");4 B5 H' _$ e( w. C( R/ E' b
- vTaskDelay(100);' j8 G: h% w4 a
- if(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_0))
7 m5 u# g9 R% T) j8 D - {
5 [: J+ C7 e4 Z6 L- V5 U - xReturn = xSemaphoreGive(Binary_Handle);
$ @( ]( v, V3 A5 q4 O2 l - if(xReturn == pdPASS)+ J1 ?/ o) ^7 P0 c5 I
- f_printf("GIVE BINARY PASS.\r\n");5 G5 A# m; M+ @! s/ y
- else if(xReturn == errQUEUE_FULL)
9 U8 ~: B7 W3 C% Z8 E: ]1 W) ]- C - f_printf("QUEUE IS FULL.\r\n");
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- vTaskDelay(100);
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- }
' j' ^1 t) X) I$ w* r - static void Led1TaskCreate(void). H( [, I9 x: F
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- while(1). L, _+ h) d \7 p8 L+ E. f
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- UBaseType_t xReturn = pdPASS;4 n" d3 Q4 e2 x) w+ x4 Z8 E' T j
-
6 C# B0 f; ?( s' S - xReturn = xSemaphoreTake(Binary_Handle, portMAX_DELAY);7 q% f! c4 \7 _ `
- if(xReturn == pdPASS)
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- f_printf("TAKE BINARY PASS.\r\n");7 b. F& A" T1 r$ S9 Y7 @9 t
- HAL_GPIO_TogglePin(GPIOB,GPIO_PIN_2);
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- vTaskDelay(100);
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- ( x, I- q" P' j2 v. ~: u
- /* USER CODE END 4 */
复制代码
/ }! P. s. ]7 e) f* Q. X计数信号量的用法示例5 M$ \7 F2 Z3 U" j* S
1.创建好带有printf-stdarg.c的FreeRTOS的工程
) W" q: u& y4 j$ e T1 Z$ A- T9 f. {2 k& x3 h- F1 W3 ?
2.修改main.c文件
! ]8 E: w4 h! ~% ` T: X
) k; A5 e( P/ y/ n. t/ c) m0 b2 W- /* USER CODE BEGIN Includes */
. G( X) @4 |6 b2 Q* F3 G' A
$ Q1 E9 B7 w0 U) [- #include "FreeRTOS.h"5 n. ^. }" ]$ j2 x: ]& h2 ^& h
- #include "task.h"
3 O! t) I8 w1 J8 b2 {5 C - #include "queue.h"( U `+ N/ k% A
- #include "semphr.h", X6 C) U0 E1 Z1 i% M
- #include <stdio.h>9 G1 v( x+ i f% e
- #include <string.h>. e' F/ @0 \8 U$ L+ Y
1 C& U$ [7 q1 W! s7 z- /* USER CODE END Includes */9 T' Q+ g2 K& D' z `% ?8 O
- /* USER CODE BEGIN PV */
, G0 g, z8 ~( q - static TaskHandle_t AppTaskCreate_Handle = NULL;$ I. }( ?+ i9 M4 s8 [7 k
- static TaskHandle_t KeyTask_Handle = NULL;
, E5 e; O+ A+ R/ S& e: }# A- p0 R - static TaskHandle_t Led1_Handle = NULL;, s- T5 T1 x3 }. W O; r
- + q+ F7 q* B3 P0 _& _/ T
- SemaphoreHandle_t SemaphCount_Handle = NULL;+ o3 ^& b3 Y3 @
: _9 C$ e! V- S! |9 f: f; l- extern int f_printf(const char *format, ...);/ }, _' ~0 {2 D7 c# c$ ~/ _) D
- 5 Z4 H) b5 h7 I' V+ X' o' d
- /* USER CODE END PV */
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- /* USER CODE BEGIN PFP */
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: O! X* i' P& O L i( }7 E- j- static void AppTaskCreate(void);6 U( z% N2 M$ u: ^
- static void KeyTaskCreate(void);
+ s. y9 ~- }9 l: [' w j - static void LED1TaskCreate(void);. B# A" K6 j) M$ ]6 A E, W
! ?9 E1 ?0 C) p% b3 y& W( e- /* USER CODE END PFP */' o* T, t, J0 T8 F) Q
- ) U: `' Y3 {1 V$ Z# `: x( k P3 I
- int main()
- p( v7 V) t' k: d - {
& I, r# m# }- B3 d - ***
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- /* USER CODE BEGIN WHILE */2 L& F, M; T$ h0 {, ?: s1 f! h/ ^
. b9 ] n4 M5 s- i A3 o- UBaseType_t xReturn = xTaskCreate((TaskFunction_t)AppTaskCreate,
$ W6 M3 O3 e& o( u5 A/ o - (const char *)"APPTASKCREATE",
, s- G9 N7 D$ U - (uint16_t) 128,4 @9 k* g4 V$ d N* ]! P
- (void *) NULL,/ @6 M( e6 V7 F- S# _
- (UBaseType_t) 2,
! J) g% L5 G4 i/ V9 F - (TaskHandle_t *)&AppTaskCreate_Handle);
+ k, z) U3 A/ \) B& w( R - if(xReturn ==pdPASS)5 ` H! c% f. ^) t$ }
- {
8 u. ]; P# h/ @7 ?1 g7 ] - f_printf("TASK START.\r\n"); x2 R6 ^6 {; B
- vTaskStartScheduler();
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; O9 I+ q0 L/ i9 W, i3 F - while (1)
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- /* USER CODE END WHILE */' M; |. A# R* T; {' J+ L: W
- $ E3 h* J! f( F5 b/ O
- /* USER CODE BEGIN 3 */. ]! `0 J! C: {
- }
6 K1 U# g/ z& v+ Z/ s- Y: H - /* USER CODE END 3 */; V3 F( M, n3 `7 p
- }& Q/ M4 x5 j6 M0 z; j! ~) S
- ' a3 H b& u: c, o% K+ V. O
- /* USER CODE BEGIN 4 */$ F, k; t* \6 x3 a
- static void AppTaskCreate(void), R! G2 R' a7 O5 h* r# o; `
- {
* {( ^: V/ k& l3 T! O, r( z
2 ~7 a5 a4 w3 T) k: f; S& O* [- UBaseType_t xReturn ;; ~0 J2 [! s% C4 y7 a D
- xReturn = xTaskCreate((TaskFunction_t)KeyTaskCreate,- i( h- b1 _# W" N6 A8 o$ L! {+ @& \
- (const char *) "KEYTASKCREATE",0 N% z3 |% |7 t4 k
- (uint16_t) 128,
* l- `% w: ]# B4 w - (void *) NULL,' z9 E: b* q( {2 r
- (UBaseType_t) 2, M! X2 k' |) V) B. c6 ^
- (TaskHandle_t*)&KeyTask_Handle);
1 m+ |8 \) c; r4 z9 A1 T1 r8 A; e - if(xReturn == pdPASS)' j, Y& h) X+ b
- f_printf("KEY CREATE PASS.\r\n");+ T) h; P" h8 A5 [$ S6 {) V
; D9 P- p5 s; m% h5 m- xReturn = xTaskCreate((TaskFunction_t)LED1TaskCreate,7 M2 ?9 L$ j/ t, `9 L3 z& Q: N
- (const char *) "LED1TASKCREATE",7 B- m/ u q. u. P+ J
- (uint16_t) 128,
9 X6 x' p7 ]8 N& T - (void *) NULL,
U+ @* g- ?- w! T6 l - (UBaseType_t) 1,
- j# S0 X! M d$ j* a- E# C - (TaskHandle_t*)&Led1_Handle);
: h) _7 a3 ?" c
" ^; W3 ~; I% h3 S9 Y7 g- SemaphCount_Handle = xSemaphoreCreateCounting(3,0);
f/ }0 Y# V( v6 P$ S - if(SemaphCount_Handle != NULL)' m" K1 }% E" h% k; ~
- f_printf("SEMAPHORE COUNT CREATE PASS.\r\n");
& Y0 k1 [* X7 |" p9 j -
( y# F, R( C: ` J1 [! J D - if(xReturn == pdPASS)! n: J9 O2 I9 G& R6 e' t; N& j
- {
' i( M4 `$ w$ k - f_printf("LED CREATE PASS.\r\n"); 6 Z& P( }* k6 U6 z7 W' Y
- vTaskDelete((TaskHandle_t)AppTaskCreate_Handle);' i. u Y2 |. f/ G0 [
- }3 ~+ ?/ x+ g% }( @7 z
- }+ E! O5 |, E2 z+ R
- + e: a* R* O& t/ ?" s3 o
4 h" F: F% v$ `. Y6 ~- static void KeyTaskCreate(void)
3 r Z4 r8 }+ M* [# a - {
: q+ {# x) C2 y$ Y9 f8 u - while(1)
k4 t% o% S& P* s1 L - {, ~5 E8 q6 c. G' H- ~0 W6 I0 M
- UBaseType_t xReturn = pdPASS;
! Q# V5 [: d' L& C% i. r( f* T - if(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_0))9 A5 N! M0 S( S2 `0 [' ]5 J
- {
. l; o* ~' `' J4 S; L - vTaskDelay(100);
% [% b& x/ [8 d1 V- H! D' L - if(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_0))0 B; G6 ]* d3 L5 q8 L9 {- E8 W
- {
% B/ s9 L+ z' w. T7 g - f_printf("KEY PRESS.\r\n");
+ f1 i3 a1 S/ S$ H - xReturn = xSemaphoreGive(SemaphCount_Handle);: S+ h+ T0 i5 r
- if(xReturn == pdPASS)8 x, o: M8 N/ ]- t
- f_printf("GIVE COUNTING PASS.\r\n");$ s. \8 z! C5 n Y- H. e! z) |
- else if(xReturn == errQUEUE_FULL)
3 Q9 W( I- E9 `8 V! V/ ` - f_printf("QUEUE IS FULL.\r\n");/ H( [! p/ O* c) F7 f4 h
- }( o. @5 u" [( Y( w
- }
% \3 P1 [7 c( G0 M - vTaskDelay(10);
) Y) H3 h; V6 l D( a - }
4 u! z0 a% g) F, b - }
" i4 Z9 a' L3 I& U - static void LED1TaskCreate(void)
3 U! A: t8 ^) ` z+ U - {
& G. ?( ]9 `: t1 Z/ V - while(1)% N' J1 E2 W$ a# j6 M
- {
: Z! t3 n* f9 \' ]" L - UBaseType_t xReturn = pdPASS;! X) m2 ?* s" T( W8 `3 b
- % v7 ^6 E7 z7 s
- xReturn = xSemaphoreTake(SemaphCount_Handle,portMAX_DELAY);
a' H3 t+ _9 ? - 4 K# V3 w, _5 Y
- if(xReturn == pdTRUE)* T3 l6 q0 S6 S% t0 N7 D+ W
- {
) [5 N$ T c/ G - HAL_GPIO_TogglePin(GPIOB,GPIO_PIN_1);
' F8 z6 C$ u- N+ N9 b- o - f_printf("Counting Take PASS.\r\n");" n* n+ H q, g; [3 [1 e& D' E
- }
4 {* P Z# o E$ T' V4 s - else if(xReturn == errQUEUE_EMPTY)
% I4 r1 s5 h1 { - f_printf("semaphore is empty.\r\n");
5 W5 f B. n/ l( g - vTaskDelay(2000); q5 S, ~- q+ a
- }
7 r) i, R& L# O6 v q$ B/ w - }8 F# c2 D4 Q3 `5 B' X
- /* USER CODE END 4 */
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复制代码
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