Mine

static int check_bit_changed(hal_bit_t *halpin, hal_bit_t *oldpin) {

    hal_bit_t bit;



    bit = *(halpin);

    if (bit != *(oldpin)) {

        if (bit != 0) //if transition to 1

        *(oldpin) = bit;

        return 1;

    }

    return 0;

}



// this function looks if any of the hal pins has changed

// and sends appropiate messages if so

static void check_hal_changes()

{

    hal_s32_t counts;

    int select_changed, joint;

    hal_bit_t bit;



    //check if machine_on pin has changed (the rest work exactly the same)

    if (check_bit_changed(*(halui_data->machine_on), &(old_halui_data.machine_on)) != 0)

        sendMachineOn();                //send MachineOn NML command