Function tm1637_gpio_driver::fourdigit7segdis::display_timer

pub fn display_timer(
    adapter: &mut TM1637Adapter, 
    sleep_fn: &dyn Fn(), 
    from_val: u16
)

Starts a timer from x to 0. Needs a sleep_fn (probably one that sleeps for one second / 1Hz). Displays pure seconds. No minutes:seconds.