for (i=0; i<NB_MAX_BUTTONS; i++) {
			if (!xhc.hal->button_pin[i]) continue;
                                                     /* Now assert HAL pin for physical button pressed */
			*(xhc.hal->button_pin[i]) = (xhc.button_code == xhc.buttons[i].code);
                                          /* in addition to HAL pin for appropriate synthesized button */
            if (strcmp("button-zero", xhc.buttons[i].pin_name) == 0) {
               *(xhc.hal->zero_x) = (xhc.button_code == xhc.buttons[i].code) && (xhc.axis == axis_x);
               *(xhc.hal->zero_y) = (xhc.button_code == xhc.buttons[i].code) && (xhc.axis == axis_y);
               *(xhc.hal->zero_z) = (xhc.button_code == xhc.buttons[i].code) && (xhc.axis == axis_z);
               *(xhc.hal->zero_a) = (xhc.button_code == xhc.buttons[i].code) && (xhc.axis == axis_a);
            }
            if (strcmp("button-goto-zero", xhc.buttons[i].pin_name) == 0) {
               *(xhc.hal->gotozero_x) = (xhc.button_code == xhc.buttons[i].code) && (xhc.axis == axis_x);
               *(xhc.hal->gotozero_y) = (xhc.button_code == xhc.buttons[i].code) && (xhc.axis == axis_y);
               *(xhc.hal->gotozero_z) = (xhc.button_code == xhc.buttons[i].code) && (xhc.axis == axis_z);
               *(xhc.hal->gotozero_a) = (xhc.button_code == xhc.buttons[i].code) && (xhc.axis == axis_a);
            }
            if (strcmp("button-half", xhc.buttons[i].pin_name) == 0) {
               *(xhc.hal->half_x) = (xhc.button_code == xhc.buttons[i].code) && (xhc.axis == axis_x);
               *(xhc.hal->half_y) = (xhc.button_code == xhc.buttons[i].code) && (xhc.axis == axis_y);
               *(xhc.hal->half_z) = (xhc.button_code == xhc.buttons[i].code) && (xhc.axis == axis_z);
               *(xhc.hal->half_a) = (xhc.button_code == xhc.buttons[i].code) && (xhc.axis == axis_a);
            }
			if (simu_mode && *(xhc.hal->button_pin[i])) {
				printf("%s pressed", xhc.buttons[i].pin_name);
			}
		}