```rust

macro_rules! apb_reset {
    (1, $tim) => {
        rcc.apb1enr1.modify(|_, w| w.[<$tim en>]().set_bit());
        rcc.apb1rstr1.modify(|_, w| w.[<$tim rst>]().set_bit());
        rcc.apb1rstr1.modify(|_, w| w.[<$tim rst>]().clear_bit());
    },
    (2, $tim) => {
        rcc.apb2enr.modify(|_, w| w.[<$tim en>]().set_bit());
        rcc.apb2rstr.modify(|_, w| w.[<$tim rst>]().set_bit());
        rcc.apb2rstr.modify(|_, w| w.[<$tim rst>]().clear_bit());
    }
}

macro_rules your_main_macro {
    (...) => {
        ....
        apb_reset($apb, $tim)
    }
}