二值信号量的用法示例
8 {5 [# c) q& _5 [& n" ^1.创建好带有printf-stdarg.c的FreeRTOS的工程0 T: \7 D4 f6 s; z3 V7 l" r
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2.修改main.c文件
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- V P: n& m+ S* G1 }- /* USER CODE BEGIN Includes */
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; v3 q- W# V2 }: {- T7 `- #include "FreeRTOS.h"
0 m! n5 P7 \! q. q) C' \ l - #include "task.h"
! a% r" x+ l8 [1 Z8 e, k8 B - #include "queue.h"' N* m8 @+ v6 ?- }9 y1 |
- #include "semphr.h"% S, y8 @+ U% }8 _
- #include <stdio.h>: s% C" Z6 C* F r
- #include <string.h>! i( X/ q; u0 z: W% Y1 m/ q: d' j
' p; _& }* b& D, c" n- /* USER CODE END Includes */3 B5 s8 I+ U8 j/ `% x1 D: U* U
- /* USER CODE BEGIN PV */7 a2 Y3 w$ e! b+ V
/ F Q7 O- q( T+ K- static TaskHandle_t AppTaskCreate_Handle = NULL;
6 _1 k4 ]6 l! f/ x: ?9 Z - static TaskHandle_t KeyTask_Handle = NULL;9 u; P, a( w# \
- static TaskHandle_t Led1Task_Handle = NULL;
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- /*Create a binary semaphore handle*/
5 u6 {; q4 }, x j: L9 r - static SemaphoreHandle_t Binary_Handle = NULL;
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- extern int f_printf(const char *format, ...);6 ~; ?7 s3 A& t8 O* t( B( Q8 M
: v* n Y6 M9 _+ }& e* G7 F J- /* USER CODE END PV */
. J" T; I1 i' H, w& M1 V& p - /* USER CODE BEGIN PFP */
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- /*Create a task function*/
) l% I! W- @2 P5 J9 ^4 n. [ - static void AppTaskCreate(void);4 ~% E0 `7 T$ {2 [
- static void KeyTaskCreate(void);/ M" w. Z' g# g, G+ L. [( C$ o
- static void Led1TaskCreate(void);
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4 D Y' j1 G3 x- /* USER CODE END PFP */+ @7 b; m9 |9 E( S' V% U
- , y$ ]7 D7 `+ y. g7 S w+ E
- int main()' a" I3 ^( w. A9 d( _
- {
; h" k5 j8 o! k0 G7 j9 z - /*# h9 A1 M" t$ b
- *
) \/ A. d- m/ P* g/ u- F - */
4 G6 S5 L, V% ~& F& O! c2 h, E - /* USER CODE BEGIN WHILE */& A# V( x9 G, _" j7 c; r e
- UBaseType_t xReturn = pdPASS;
, X& R* j) N' A' o -
0 t9 X# V7 T5 [* {! e6 s, M, J" O - xReturn = xTaskCreate((TaskFunction_t)AppTaskCreate,
* r" b1 X K* K. o - (const char *) "APPTASKCREATE",
0 j# U! L- a. Y- y - (uint16_t) 128, k# p" S6 p( _/ _
- (void *) NULL,+ R, I- d6 ?* g" }; Y6 K
- (UBaseType_t) 2,# j' ^& D1 E S- F* p% @1 }
- (TaskHandle_t *)&AppTaskCreate_Handle);5 Z! z+ X" V; O; C* D, g/ V
- if(xReturn ==pdPASS)
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% P3 t9 S' l1 \, H8 ~: n - vTaskStartScheduler();: n5 h6 X+ Y; @! y( m+ q
- f_printf("start..\r\n");8 W; g5 g( v/ N( U* q9 B7 y
- }
8 T# ^4 R% S6 f" H+ O - while (1)) n7 ^" T+ f) B! d( m9 U
- {
; m5 _ x9 t, }5 G6 } - /* USER CODE END WHILE */
1 |' ?% f! s/ `7 Q& Z
. ]- E& N& ]/ s' F- /* USER CODE BEGIN 3 */5 g) r3 i5 h/ p. F a) s
- }
5 V. T2 q/ ]6 r& w% ?; C& b( K4 G - /* USER CODE END 3 */9 l' h0 q W- J5 Z) t* O
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- B( w6 w/ j9 I [; c4 H! r - 4 c: u3 y. }, U
- " m6 y x: @, T& L9 ? c9 ~. c
- /* USER CODE BEGIN 4 */
) L7 o7 J# i% [1 n: r: j# Q' y7 h - static void AppTaskCreate(void)
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4 U& `# r, _+ Q - UBaseType_t xReturn = pdPASS;
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$ q5 _' j/ B% W3 Z- G- xReturn = xTaskCreate((TaskFunction_t) KeyTaskCreate, k, Q+ m+ c1 |- p: B$ t* K
- (const char *) "KEYTASKCREATE",
. U' h& q4 S1 S( P5 j4 l' V. I( L - (uint16_t) 128,
: Y$ }- j+ L( a+ N: X# U* D - (void *) NULL,( |9 o' M- P. e6 ^
- (UBaseType_t ) 2,
}0 |! B7 b4 k# w* R+ _ - (TaskHandle_t *) &KeyTask_Handle);
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- xReturn = xTaskCreate((TaskFunction_t) Led1TaskCreate,
. I7 A1 t0 K* P2 z3 d: V1 _, U - (const char *) "LED1TASKCREATE",2 l! ~. `% L3 n& B: T
- (uint16_t) 128,7 Q, o/ U' G% {' Q! T
- (void *) NULL,* V5 l5 B+ t6 R
- (UBaseType_t) 1,% o4 o: l5 H G6 p
- (TaskHandle_t *)&Led1Task_Handle);
7 X; ?. Q) g* L3 Z -
4 B/ X. X Z K - /*Create a binary semaphore*/1 A2 g, T- e0 v) O i& g
- Binary_Handle = xSemaphoreCreateBinary();
0 a q2 `8 N1 u4 X6 T - if(Binary_Handle !=NULL)
: f W: W& Y! X& z% O4 { - f_printf("Create Semph_Binary PASS.\r\n");0 H4 P$ L, ?, E2 R ~8 o" C
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- if(xReturn == pdPASS) A8 r1 |3 {& q- s9 c7 n3 }. G
- vTaskDelete((TaskHandle_t)AppTaskCreate_Handle);
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- static void KeyTaskCreate(void)
' {: u# g1 [, T - {
) \9 p6 _4 B4 v) P! v9 k' X - while(1)+ d/ O# j% t' p
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- UBaseType_t xReturn = pdPASS;
+ r/ ~" z$ a& A$ M6 { - if(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_0))
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- f_printf("KEY TASK PASS.\r\n");- E/ R+ _0 r- |1 m+ ~$ O4 U
- vTaskDelay(100);3 Z5 A5 F* @7 B9 X
- if(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_0))
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- xReturn = xSemaphoreGive(Binary_Handle);
2 \8 Q7 a) x) T - if(xReturn == pdPASS)
& h; x0 R& x2 ^( T7 \ - f_printf("GIVE BINARY PASS.\r\n");
8 L: t9 w% [/ N7 E4 V2 ?4 n" o - else if(xReturn == errQUEUE_FULL)! w* @1 S+ V" ]; g/ a( v; `
- f_printf("QUEUE IS FULL.\r\n");
) b9 \; v& s( w4 A& \ - }
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-
+ R/ ?9 v& m) Q+ }5 ^! I9 n - vTaskDelay(100);
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- }
1 \9 I& c' a: W% m% X - static void Led1TaskCreate(void): t4 E; u$ y7 Q
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- while(1)& E! |+ R# o9 F E5 C
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- UBaseType_t xReturn = pdPASS;' g! \$ y: C/ ?3 |2 o8 P& K
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- xReturn = xSemaphoreTake(Binary_Handle, portMAX_DELAY);# e/ n$ F& H$ c' }9 [2 P- ]$ N
- if(xReturn == pdPASS)4 A1 n( j" T) y) R
- {3 l& ?! k7 ]6 E' T4 K$ K5 a
- f_printf("TAKE BINARY PASS.\r\n");
4 R5 s/ B- j% ^7 x) ^- ^7 R, f5 h - HAL_GPIO_TogglePin(GPIOB,GPIO_PIN_2);8 N, n' g. y" C' T' N- ~
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- vTaskDelay(100);
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- }
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- /* USER CODE END 4 */
复制代码
4 M( Q& V3 p& u2 G4 D- C* g( u计数信号量的用法示例 @# W, [) W/ e2 a% V% f
1.创建好带有printf-stdarg.c的FreeRTOS的工程 L2 i: N' `6 p3 m9 b
6 w1 t1 A- s! m$ I2 C5 K9 t6 e$ {
2.修改main.c文件
2 w ?. j) T+ `9 e7 Y
, [ |2 o0 I Y( h2 O- /* USER CODE BEGIN Includes */* k+ j2 F% ~/ M* b1 H$ K& r
- & E, E8 J' O$ W6 ~6 g: ]
- #include "FreeRTOS.h"" D% l' g9 U8 i$ L: g
- #include "task.h"7 T) H; V; h7 N v* P
- #include "queue.h"
/ F1 g+ F8 [" { {/ A' h! N1 [ - #include "semphr.h"
; s$ L+ z6 c" z* w6 ~+ V - #include <stdio.h>6 I" T l6 Q, c- w# }$ x9 C
- #include <string.h>/ {' j9 v: K3 T: @. L) F
( R0 m( c+ L$ ]: d/ ^- /* USER CODE END Includes */
1 q% P; h: q8 m( s& N) f; g# o6 k9 g - /* USER CODE BEGIN PV */
6 R7 F0 j( z" z& { - static TaskHandle_t AppTaskCreate_Handle = NULL;3 k# W6 u! b7 `( a
- static TaskHandle_t KeyTask_Handle = NULL;- z6 i g) P6 X4 B- a! R1 f8 U8 S
- static TaskHandle_t Led1_Handle = NULL;
t* k4 }' o: l0 h
' q+ D- r! q" ^+ A2 T6 T6 B- }- SemaphoreHandle_t SemaphCount_Handle = NULL;
x4 E9 D8 D. q8 `" H - % l; P, F( c- d9 w+ g8 [( s d# r
- extern int f_printf(const char *format, ...);% ^0 K3 Q% x/ P' O0 D/ w
- ; P# W% x1 e; y# p2 k/ o
- /* USER CODE END PV */
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- /* USER CODE BEGIN PFP */
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# m" f) d/ r: V0 R5 w/ n- static void AppTaskCreate(void);% |2 H; ]8 f" S2 S( F! A# B
- static void KeyTaskCreate(void);6 u/ n; @/ y1 y4 W6 O
- static void LED1TaskCreate(void);7 u! {- Y% p+ O
7 }+ R1 R) V; T- /* USER CODE END PFP */$ x) x( Q, o& d3 e$ a. M2 _
- & d0 w+ W# M* X) V5 s2 T
- int main() J6 _/ B. E- M4 }! F* P
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- *** a+ f) s8 d, u' m5 `# {( n
- , O& H) m4 h/ a. R. ^
- /* USER CODE BEGIN WHILE */. m6 M9 h, W' X$ ]3 l
- " \$ I" R7 c7 C& h
- UBaseType_t xReturn = xTaskCreate((TaskFunction_t)AppTaskCreate,6 j. D" O# d3 w+ p3 f
- (const char *)"APPTASKCREATE",# c) J3 a2 {1 x# T/ ^0 u5 J
- (uint16_t) 128,
' I8 r6 g/ B2 Q5 j" @* V, f - (void *) NULL,; E! M, M2 p* y2 D
- (UBaseType_t) 2,4 E- Q" y# f1 {+ W5 r/ C8 E
- (TaskHandle_t *)&AppTaskCreate_Handle);
: b* O) o) B& V% L8 g - if(xReturn ==pdPASS)
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- f_printf("TASK START.\r\n");% u# f( G B1 z
- vTaskStartScheduler();- X$ r+ v6 J' a [0 y3 f
- }
A) `( `( b l3 G9 X - while (1)4 j/ R5 V" w) M2 [ l
- {
$ C6 P% s* V2 o: V - /* USER CODE END WHILE */2 w/ h Z% I' B& K0 s- ~( O
- . d5 c" q$ G' O; |4 V7 v3 A
- /* USER CODE BEGIN 3 */
! G' F' z/ U' ~2 s5 L1 O - }
! M# p8 @: s0 e, R. E& Z+ l - /* USER CODE END 3 */% \' m3 T8 q S) s ~
- }
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- /* USER CODE BEGIN 4 */
# V% {( [9 g! i: ]6 @+ P( ]0 t - static void AppTaskCreate(void)6 f4 c9 G/ c) M0 s8 Y
- {8 ^+ l, E2 I7 E4 l# I P6 h
, j2 ~, O9 }5 r' Q- UBaseType_t xReturn ;
0 c$ P9 G# s$ F( s, A+ v3 @- l& C" x - xReturn = xTaskCreate((TaskFunction_t)KeyTaskCreate,
5 e+ |0 w/ ~! j9 @1 k; s - (const char *) "KEYTASKCREATE",# B/ g/ Z* {) s% q
- (uint16_t) 128, r) T X; l" y5 ^; Q z
- (void *) NULL,* U5 C1 V% W, z7 ], @ x* I
- (UBaseType_t) 2,
+ }+ S/ {% {! U - (TaskHandle_t*)&KeyTask_Handle);6 V! K; t% j7 n \
- if(xReturn == pdPASS)$ z$ R Q' g3 P9 k1 _" k
- f_printf("KEY CREATE PASS.\r\n");( [* X G* j [* @) j/ ~
/ W, o' G8 h- u) u* c; f- xReturn = xTaskCreate((TaskFunction_t)LED1TaskCreate,8 g9 |2 r1 b) Y
- (const char *) "LED1TASKCREATE",+ j3 F6 k7 J2 L7 d/ K& P
- (uint16_t) 128,
% N4 ~* H$ K! ? - (void *) NULL,
! ?) P' V" I7 X - (UBaseType_t) 1,
+ [2 e) D+ f( ` - (TaskHandle_t*)&Led1_Handle);' m! T& d9 T9 r7 z* S9 p) @
- " N2 u$ ?& H5 r/ H5 f
- SemaphCount_Handle = xSemaphoreCreateCounting(3,0);/ M8 R8 R& Q4 F! e( _' g
- if(SemaphCount_Handle != NULL)
. I3 c; H- I8 B F) R- V; M - f_printf("SEMAPHORE COUNT CREATE PASS.\r\n");8 k+ ]) f2 X: _' v% p. Y; m
- : V: m/ S" X/ O3 Z7 w6 d* H
- if(xReturn == pdPASS)3 `# V8 Q6 r& ^
- {
/ x; J: m9 S- Y5 j0 g+ |" ~) \ - f_printf("LED CREATE PASS.\r\n"); , D, e5 t: {: k) C$ Z
- vTaskDelete((TaskHandle_t)AppTaskCreate_Handle);( Z' n# Z8 Y4 b+ i' C
- }; d ] q" \/ k9 Q
- }; [5 e; b9 C. b, _
: ]# V7 G ^' f/ p8 ^' p! T' \- ) O" G% ^/ ^) j# Z" `( ^# `
- static void KeyTaskCreate(void)4 b; s$ X: Q; K' _8 T' B
- {3 r. i. e, G5 L3 y1 Z T- ~: I
- while(1)$ J; b! l5 {1 A! o& M6 r0 T1 Y `
- {, k E" I2 y7 _9 G2 p( s
- UBaseType_t xReturn = pdPASS;
) a4 x* b2 k) g1 B) \' G+ d! P - if(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_0)). ]8 T& y0 u j3 ^
- {4 Q5 E( d3 x0 o8 I
- vTaskDelay(100);
$ |7 l C3 F, f0 [8 I- w' z: c3 B! F - if(HAL_GPIO_ReadPin(GPIOA,GPIO_PIN_0))$ [' M0 U; z- f
- {
+ M1 t' \% ]! r7 `. B6 ] - f_printf("KEY PRESS.\r\n");7 t ~8 y; f( I, k, I
- xReturn = xSemaphoreGive(SemaphCount_Handle);3 ~. J2 f* L4 M8 u" i0 p: T
- if(xReturn == pdPASS)
0 k. _1 o, K4 x% q - f_printf("GIVE COUNTING PASS.\r\n");
6 w5 P( }8 f+ Q. @# e - else if(xReturn == errQUEUE_FULL)
- f Q' b$ M* |+ ^- x! U% Y6 F - f_printf("QUEUE IS FULL.\r\n");5 a' v8 T- u7 x$ q
- }
6 ~, K, ?! s% s$ u9 O2 g9 r - }
0 T+ c; d3 B7 D. g - vTaskDelay(10);
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- }8 {5 T' k' ?: U: H- Q ]; H8 j! a
- static void LED1TaskCreate(void)
' H% ?: R- k% H - {
2 G% z* G4 @- c5 t X - while(1)8 T- H" L+ \0 Y, U3 [! T
- {
' h: L) f% A% W+ c5 H - UBaseType_t xReturn = pdPASS;& W1 L5 o( j7 b f
-
1 c y" m C2 {6 Z - xReturn = xSemaphoreTake(SemaphCount_Handle,portMAX_DELAY);% n" c8 R* q m( D2 C
-
6 _' \0 E$ |9 W5 _ - if(xReturn == pdTRUE)
8 E# {7 j% `/ B' o% g$ C* a - {* d! R0 g8 S( M9 h, J9 T( d
- HAL_GPIO_TogglePin(GPIOB,GPIO_PIN_1);
" ~6 y# c4 y' z - f_printf("Counting Take PASS.\r\n");& r& X6 l( D1 }
- }
& C, T5 }/ b+ L$ |* \ - else if(xReturn == errQUEUE_EMPTY)
% f9 y' v, F* v/ l5 i - f_printf("semaphore is empty.\r\n");
4 ]% e* x( W4 y" \9 E$ l0 M - vTaskDelay(2000);- c) _2 f) a4 u, P
- }
* ^# g8 ^% r( _8 h - }
: O( H1 f/ {1 N0 @. g3 i - /* USER CODE END 4 */
1 d3 v" f, o' b h. \* p0 y
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复制代码
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