## Tasks list
### RCC
- [X] IOP
- [ ] AHB
- [X] APB1
- [ ] APB2
- [X] CFGR (conferir)
### GPIO
- [x] traits embedded hal
- [x] pull up
- [ ] pull down
- [x] push pull
- [ ] open drain
- [ ] Afs (mudar isso)
- [x] AF5 - PA5 TIM2_ch1
- [ ] GPIOB, GPIOC...
- [x] Rever os into_pu...
- [ ] Rever push_pull, open_drain.
### Time
- [x]
### PWM
- [x] Pwm
- [x] PwmPin
...
### Exception
- [ ] Systick
### ADC
- [ ] Abstraction 0 - adc_config and adc_read.