Mbed写的简单的定时器

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pythonworld 发布时间：2017-9-29 18:53

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本帖最后由 pythonworld 于 2017-9-30 21:05 编辑

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;
int second =5;
const float interval1 = 0.2;
const float interval0 = 0.5;
DigitalOut  my_led(D13);
DigitalOut  my_buzzer(D8);

InterruptIn my_button1(D6);
InterruptIn my_button2(D5);
InterruptIn my_button3(D4);
InterruptIn my_button4(D3);

Timeout my_timer;

void key1_pressed()
{

my_timer.detach();
status = 1;
second = 10;

}

void key2_pressed()
{

my_timer.detach();
status = 1;

second = 300;
}

void key3_pressed()
{

my_timer.detach();
status = 1;

second = 600;
}

void key4_pressed()
{

my_timer.detach();
status = 1;

second = 900;
}

void buzzer()
{
my_buzzer = !my_buzzer;
my_led = !my_led;
wait(interval1);
my_buzzer = !my_buzzer;
wait(interval0);

my_buzzer = !my_buzzer;
my_led = !my_led;
wait(interval1);
my_buzzer = !my_buzzer;
wait(interval0);

my_buzzer = !my_buzzer;
my_led = !my_led;
wait(interval1);
my_buzzer = !my_buzzer;
wait(interval0);

my_buzzer = !my_buzzer;
my_led = !my_led;
wait(interval1);
my_buzzer = !my_buzzer;
wait(interval0);

my_buzzer = !my_buzzer;
my_led = !my_led;
wait(interval1);
my_buzzer = !my_buzzer;
wait(interval0);
status = 0;

}

int main()
{
my_buzzer.write(1);
// Set button
my_button1.fall(&key1_pressed);
// my_button1.rise(&key1_pressed);

my_button2.fall(&key2_pressed);
// my_button2.rise(&key2_pressed);

my_button3.fall(&key3_pressed);
// 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);
         status = 2;
      }
      if(status == 2)
   { wait(0.5);
      my_led = !my_led;
      }
}

}