Make sure the STATUS register has been synced between the different clock domains.
Especially the LETIMER needs some time to update the STATUS register after it has been enabled. If the LETIMER is started and stopped with just a short delay, pm_layered gets confused because the timer seems to be inactive ...
This allows boards to define different crystal frequencies. The correct frequency is required by the system-related methods to ensure proper function of the underlying emlib.
The peripheral configuration has been completely reworked to resolve
pin conflicts while provided as much of the peripherals as possible.
The changes include:
- Move `I2C_DEV(0)` from PB6/PB7 to PB8/PB9 to solve pin conflict with
`QDEC_DEV(2)`.
- Use pins PB0, PB1, PB4, and PB5 for PWM instead PA8, PA9, PA10, and
PA11
- PA9 and PA10 is in pin conflict with `UART_DEV(0)` which is used
for stdio with `stdio_uart`, PA8 was in conflict with
`QDEC_DEV(0)`, PA11 was in conflict with USB D-
- Use PB6, PB7 as `QDEC_DEV(0)` (previously `QDEC_DEV(2)`), as this is
the only completely conflict free setting
- Use PB4/PB5 instead of PA6/PA7 for QDEC_DEV(1)
- This fixes a pin conflict with `SPI_DEV(0)` MISO (and
`ADC_LINE(4)`)
- Only provide QDEC at PB4/PB5 when PWM is not used to avoid conflict
- Only provide QDEC at PA8/PA9 when UART is not used to avoid conflict
- Use SPI2 (PB15, PB14, PB13, PB12) as `SPI_DEV(0)` instead of SPI1,
use SPI1 (PA7, PA6, PA5, PA4) as `SPI_DEV(1)`
- Only provide `SPI_DEV(1)` if the ADC is not in used to resolve a
pin conflict
- Move PB0 and PB1 at the end of the ADC lines (previously
`ADC_LINE(6)` and `ADC_LINE(7)`, now `ADC_LINE(8)` and `ADC_LINE(9)`)
- Only provide them when PWM is not in use (to resolve pin conflict
with PWM)
- Also do not provide them for the Blackpill boards, which are
missing pins PB0 and PB1 on the headers
To make life of users easier, a Pinout diagram with the new
configuration was added.
This allows including C headers from C++. It sadly reduced the
diagnostics on C++ code as well, were there warning may make sense as
unintended side effect. We may be able to drop that later on, when more
C APIs are properly wrapped in native C++ APIs, so that C headers do no
longer need to be compatible with C++ compilers.
Nightlies are failing due to kconfig mismatch.
It would seem this is a result of bringing in the USB stuff.
I assume that this uses ztimer periph_timer as a backend as periph_timer is already selected.
However, kconfig only resolves one and not recursively making it hard to match.
For not a hack is added to override for these boards.
