mbed 按键长短按 实现

#define LONG_PRESS 100 // 20ms*100=2s,
#define SHORT_PRESS 5 // 20ms*5=100ms,

InterruptIn btn(USER_BUTTON);
int btn_now = 0;
int btn_last = 0;
bool btn_long = false;
bool btn_short = false;
bool btn_sta;
int count = 0;
float interval = 0.02;

void key_scan()
{
btn_last = btn_now;
btn_now = btn.read();
if (btn_last==1 && btn_now ==0 ) //°´ÏÂ
btn_sta = true;
if (btn_last==0 && btn_now ==1 ) //µ¯Æð
btn_sta = false;

//printf("btn_sta= %d\r\n",btn_sta);

if (btn_now == btn_last && btn_sta) {
count++;
//printf("count= %d \r\n",count);
if (count > LONG_PRESS) {
printf("button is a long press \r\n");
btn_sta = false;
count = 0;

i2c.write(0xA0, NULL, sizeof(struct stm32f411xx_baseboard_id) + 2);
wait(0.02);
SoftReset();
}
}
else {
if (count > SHORT_PRESS) {
printf("button is a short press \r\n");
btn_sta = false;
count = 0;
}
else {
count = 0;
}
}

//printf("button is %d \r\n",btn.read());
}

timer_key.attach(&key_scan,interval);

#include "mbed.h"

Serial pc(USBTX, USBRX);
InterruptIn mybutton(USER_BUTTON);
DigitalOut myled(LED1);
Timeout timer1;
Timeout timer2;

bool flag;

float delay = 1.0; // 1 sec

void long_press()
{
if (!mybutton.read())
//myled = !myled;
pc.printf("long pressed \r\n");
else
pc.printf("short pressed \r\n");
}

void short_press()
{
if (mybutton.read())
//myled = !myled;
pc.printf("short pressed \r\n");
}

void pressed()
{
timer1.attach(&long_press,0.2*10);
timer2.attach(&short_press,0.2);
}

int main()
{
pc.baud(115200);
mybutton.fall(&pressed);
while (1) {
wait(0.1);
}
}