611ef27ac2
Matches the implementations of the NRF and Atmel ports. TIM7 is used as it does not have a tied pin. Contains some register micromanagement since HAL support for the TIM7 timer is limited.
CircuitPython Port To The ST Microelectronics STM32F4 Series
This is a port of CircuitPython to the STM32F4 series of chips.