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本帖最后由 pythonworld 于 2017-9-30 21:05 编辑 . r4 g4 ~9 Y' c. _4 V Mbed写的简单的定时器，分别定时10s, 300s, 600s, 900s.四个按键选择。 按键使用专用的模块，好处是不用做复杂的按键处理。 #include "mbed.h" int status = 0;0 i# V# V; A! j( v+ l2 [( f; k int second =5; const float interval1 = 0.2; const float interval0 = 0.5; DigitalOut my_led(D13); DigitalOut my_buzzer(D8); 2 a& _$ ^4 c$ [1 n) D9 F6 `1 ? InterruptIn my_button1(D6);5 Z3 @1 R+ x$ ^2 Z" W P9 i; ` InterruptIn my_button2(D5); InterruptIn my_button3(D4);4 [1 {3 l: f' V. Y InterruptIn my_button4(D3);+ o* K4 s% ^3 ? a2 v 1 c. k! m& c7 u) u& H( F$ D Timeout my_timer; void key1_pressed() { . B1 ?5 K& t4 ~& |) D9 [5 c my_timer.detach(); status = 1;: i( a, Y; A0 M: R second = 10; 5 n9 k) u2 @# J7 h0 @ }/ ] D7 y* K% I" k( m 6 Y$ [7 I9 U: ` a# c# m. o void key2_pressed() {3 v5 e( r( B: o A. g # _# s& m9 s. w: ^ my_timer.detach();( c- s- n8 O+ S: J) X( A status = 1; second = 300;1 E: Z2 I& D$ h, z } void key3_pressed() { ! s; P$ `" B& J my_timer.detach();- ]) V! D& j$ S9 c status = 1; , `6 |* P, R5 L$ }& P/ r) c+ p. f second = 600; } void key4_pressed()* P5 t1 s: S) \2 J! u0 Y" a/ u { my_timer.detach(); status = 1; second = 900; } void buzzer()' h1 j+ ~6 g3 O {0 N* p' }) c! v+ W: c2 I$ | my_buzzer = !my_buzzer; my_led = !my_led; wait(interval1);' O/ s2 P6 n, `/ Y3 Z) ] my_buzzer = !my_buzzer;: k7 I: Z# e* T2 q wait(interval0);; Q) T! \* X" O3 Q: W4 k# b my_buzzer = !my_buzzer;! F2 O6 M6 |: I; X+ w9 k my_led = !my_led; wait(interval1);: O0 y' c/ p6 ?1 [ my_buzzer = !my_buzzer;2 E5 t6 z5 K5 k) c wait(interval0); my_buzzer = !my_buzzer;. q4 e1 Y; ~( J9 o% |. c& T7 h my_led = !my_led; wait(interval1);2 C4 D8 Y6 ^/ h3 b5 ~, P4 h( B my_buzzer = !my_buzzer; wait(interval0);3 k# T4 Y, a- [' _ my_buzzer = !my_buzzer; my_led = !my_led; wait(interval1); my_buzzer = !my_buzzer;: |& \+ I g9 X3 ]( e wait(interval0); 6 z$ F Y2 t- u; W$ ?: | my_buzzer = !my_buzzer; my_led = !my_led;+ J: p9 M+ l$ d: Y6 p+ j3 z wait(interval1);; P& @8 o. z- x. H5 \1 I% Z; q# D my_buzzer = !my_buzzer; wait(interval0);. V z& O- {9 W status = 0; 2 Z7 L4 K2 n1 A- X& X } ' ^* L% d+ D; B% _$ k D int main()6 C8 m% z: r! ^ G {& f5 h7 P7 U# h5 C2 W6 k my_buzzer.write(1);9 j3 @8 K- j6 {( v // Set button my_button1.fall(&key1_pressed);, F" Y: E- d% W; e( o# g // my_button1.rise(&key1_pressed); + D$ y# V2 G3 p3 A+ y+ Q my_button2.fall(&key2_pressed);- H; n9 _" r* b* [+ x! ~6 w- m# e // my_button2.rise(&key2_pressed); ^' s6 }2 p W7 U; f% _; T7 n my_button3.fall(&key3_pressed);$ J/ c$ `! w3 R8 e! s2 S // my_button3.rise(&key3_pressed); my_button4.fall(&key4_pressed); // my_button4.rise(&key4_pressed); while (1) { if(status == 1) { my_timer.attach(&buzzer,second);5 I& U: _- W; [" l status = 2; } if(status == 2)5 D0 K' V$ U$ U" D0 J* P3 @ { wait(0.5); my_led = !my_led;0 o2 {. ]2 W) R- r1 q1 r } }+ b& c+ C, a( W4 P4 B6 L 2 s, h" X. {' u7 \1 |, S- f }) q0 R1 h4 E# j2 Q |
| 谢谢分享 |
| 四个按键太多，能否减去2个，用两个按键来设置。 |
