Source-Address-Filtering is not helping the board to receive packets.
For unknown reasons, the Receive-All is required, when in theory
it should not be required. Until we figure it out, follow the
stm32h7xx-hal example of setting RA=true.
Based on the HAL from stm32wl, the peripheral driver has been
modified to fit into embassy, using the embassy APIs, providing
operation of the radio peripheral.
The initial version does not offer any async APIs, but the example
shows how the radio IRQ can be used to perform async TX of the radio.
Older families like F1 and F4 have a consistent naming for the CAN
peripherals: CAN when there is only one instance, CAN1/CAN2/CAN2 if
there are multiple instances.
Newer families like L4 and F7 use the name CAN1 even if there is only
one instance. The number of filter banks is incorrect for those.
Affected chips:
* STM32F722
* STM32F723
* STM32F730
* STM32F732
* STM32F733
* STM32L4P5
* STM32L4Q5
* STM32L4R5
* STM32L4R7
* STM32L4R9
* STM32L4S5
* STM32L4S7
* STM32L4S9
* STM32L431
* STM32L432
* STM32L433
* STM32L442
* STM32L443
* STM32L451
* STM32L452
* STM32L462
* STM32L471
* STM32L475
* STM32L476
* STM32L485
* STM32L486
* Generate a core index put into the PAC for the peripherals to use as
index into registers.
* Add EXTI v2 which uses CORE_INDEX to index exti registers
* Add IRQ-driven buffered USART implementation for STM32 v2 usart
* Implementation based on nRF UARTE, but simplified to not use DMA to
avoid complex interaction between DMA and USART.
* Implementation of AsyncBufRead and AsyncWrite traits
* Some unit tests to ring buffer
* Update polyfill version
* Update sub module to get usart IRQ fix
