In the feather-m0 board the sx127x pin parameters are hardcoded for the
feather-m0-lora variant, but this is not compatible with other
configurations.
For example in the feather-m0 adalogger PA06 and PA08 are used for the
SD card. When combined with the RFM95W FeatherWing the IRQ/CS/RST pins
must be wired, and then the sx127x pins must be configured to match the
wiring (which will be necessarily different from the lora variant
configuration).
All derived `feather-m0-*` boards have all features of the `feather-m0` board and `Makefile.features` of derived `feather-m0-`*` boards just include `Makefile.features` of the `feather-m0` base board. Therefore a base board definition is used in Kconfig for all `feather-m0*` boards.
This feature is only used to blacklist stdio via CDC ACM.
Introduce the `highlevel_stdio` feature instead to indicate
that stdio functionality requires a running thread to print
anything
Instead of hard-coding the peripheral clocks to CLOCK_CORECLOCK
introduce helper functions to return the frequency of the individual
GCLKs and use those for baud-rate calculations.
This requires the GCLK to be part of the peripheral's config struct.
While this is already the case for most peripherals, this also adds
it for those where it wasn't used before.
As it defaults to 0 (CLOCK_CORECLOCK) no change is to be expected.
To simplify board definitions and for unification between samd2x and
newer models, don't use the GCLK bitmask in board definitions.
Instead use the GCLK index and generate the bitmask when needed.
With the introduction of BOARDSDIR external boards can re-use common
code of BOARDS present in RIOTBASE. To be able to do this file
references may not use $(BOARD) since BOARD will be set by the
external BOARD.
This change is for all boards with a sam0 cpu. This cpu just has one ADC.
It is unnecessary to have defines with ADC_0_ prefix as if multiple ADCs
are possible.
Some defines were not used, such as ADC_0_EN, ADC_0_CHANNELS,
ADC_MAX_CHANNELS, ADC_0_CLK_SOURCE, ADC_0_CHANNELS
Change all ADC_0_ prefixes to ADC_
cpu/$(CPU)/Makefile.features and cpu/$(CPU)/Makefile.dep are
automatically included
Part of moving CPU/CPU_MODEL definition to Makefile.features to have it
available before Makefile.include.
