diff --git a/bak.txt b/bak.txt
deleted file mode 100644
index eefd113..0000000
--- a/bak.txt
+++ /dev/null
@@ -1,277 +0,0 @@
-// pub mod gpioa {
-// use core::marker::PhantomData;
-// use core::convert::Infallible;
-// use cortex_m::interrupt::CriticalSection;
-// use super::{
-// FUNSEL1, FUNSEL2, FUNSEL3, Floating, Funsel, GpioExt, Input, OpenDrain,
-// PullUp, Output, FilterType, FilterClkSel, Pin, GpioRegExt, PushPull
-// };
-// use crate::{pac::PORTA, pac::SYSCONFIG, pac::IOCONFIG};
-// use embedded_hal::digital::v2::{InputPin, OutputPin, StatefulOutputPin, toggleable};
-// pub struct Parts {
-// pub pa0: PA0>
-// }
-
-// impl GpioExt for PORTA {
-// type Parts = Parts;
-// fn split(self, syscfg: &mut SYSCONFIG) -> Parts {
-// syscfg.peripheral_clk_enable.modify(|_, w| {
-// w.porta().set_bit();
-// w.gpio().set_bit();
-// w.ioconfig().set_bit();
-// w
-// });
-// Parts {
-// pa0: PA0 { _mode: PhantomData }
-// }
-// }
-// }
-
-// fn _set_alternate_mode(index: usize, mode: u8) {
-// unsafe {
-// let reg = &(*IOCONFIG::ptr());
-// reg.porta[index].modify(|_, w| {
-// w.funsel().bits(mode)
-// })
-// }
-// }
-// pub struct PA0 {
-// _mode: PhantomData,
-// }
-// impl PA0 {
-// pub fn into_funsel_1(self, _cs: &CriticalSection) -> PA0> {
-// _set_alternate_mode(0, 1);
-// PA0 { _mode: PhantomData }
-// }
-// pub fn into_funsel_2(self, _cs: &CriticalSection) -> PA0> {
-// _set_alternate_mode(0, 2);
-// PA0 { _mode: PhantomData }
-// }
-// pub fn into_funsel_3(self, _cs: &CriticalSection) -> PA0> {
-// _set_alternate_mode(0, 3);
-// PA0 { _mode: PhantomData }
-// }
-// pub fn into_floating_input(self, _cs: &CriticalSection) -> PA0> {
-// unsafe {
-// let reg = &(*IOCONFIG::ptr());
-// reg.porta[0].modify(|_, w| {
-// w.funsel().bits(0);
-// w.pen().clear_bit();
-// w.opendrn().clear_bit()
-// });
-// let port_reg = &(*PORTA::ptr());
-// port_reg.dir().modify(|r,w| w.bits(r.bits() & !(1 << 0)));
-// }
-// PA0 { _mode: PhantomData }
-// }
-
-// pub fn into_pull_up_input(self, _cs: &CriticalSection) -> PA0> {
-// unsafe {
-// let reg = &(*IOCONFIG::ptr());
-// reg.porta[0].modify(|_, w| {
-// w.funsel().bits(0);
-// w.pen().set_bit();
-// w.plevel().set_bit();
-// w.opendrn().clear_bit()
-// });
-// let port_reg = &(*PORTA::ptr());
-// port_reg.dir().modify(|r,w| w.bits(r.bits() & !(1 << 0)));
-// }
-// PA0 { _mode: PhantomData }
-// }
-
-// pub fn into_pull_down_input(self, _cs: &CriticalSection) -> PA0> {
-// unsafe {
-// let reg = &(*IOCONFIG::ptr());
-// reg.porta[0].modify(|_, w| {
-// w.funsel().bits(0);
-// w.pen().set_bit();
-// w.plevel().clear_bit();
-// w.opendrn().clear_bit()
-// });
-// let port_reg = &(*PORTA::ptr());
-// port_reg.dir().modify(|r,w| w.bits(r.bits() & !(1 << 0)));
-// }
-// PA0 { _mode: PhantomData }
-// }
-
-// pub fn into_open_drain_output(self, _cs: &CriticalSection) -> PA0