File content as of revision 7:774c2b305d2d:

#include "mbed.h"
#include "modbus.h"

DigitalOut myled(LED1);
InterruptIn button(USER_BUTTON);
RawSerial pc(USBTX, USBRX);

int cunt_pressed = 0;
int cunt_released = 0;
int x,y;

void serial_callback()
{
    uint8_t frame[6];
    char ch = pc.getc();
    pc.printf("%d", modbus_parser(ch, frame));
}

void pressed()
{
    if(cunt_released != 0)
        {
            y = cunt_released;
            modbus_update(0, y);
            pc.printf("released = %d\n",modbus_read(0));
            cunt_released = 0;
        }
    while(button==0){
        cunt_pressed =  cunt_pressed+1;
        wait(0.1);
    }
}

void released()
{
     if(cunt_pressed != 0)
        {
            x = cunt_pressed;
            modbus_update(1, x);
            pc.printf("pressed = %d\n",modbus_read(1));
            cunt_pressed = 0;
        }
    while(button==1){
        cunt_released = cunt_released+1;
        wait(0.1);
        }
}

int main() {
    // setup code
    pc.attach(serial_callback);
    
    // 1. button code
    button.mode(PullNone); 
    button.fall(&pressed);  
    button.rise(&released);
    
    // 2. timer code
    while(1) {
        // loop code
        myled = 1; // LED is ON
        wait(0.2); // 200 ms
        myled = 0; // LED is OFF
        wait(1.0); // 1 sec
    }
}