Currently this looks up the frequency in the global singleton that must
be initialized by the per-chip RCC implementation. At present, this is
only done for the L0 family of chips.
* Moves the tim2-specific code into macro which always uses TIM2
* For peripherals without clock specified, attempt to locate enable and
reset registers in the RCC block matching the peripheral name. This
could be useful for peripherals where deducing the clock name might
not be feasible, but it remains to be tested with more chip families
to see if it is sufficiently accurate.
Adds RccPeripheral trait for peripherals implementing clock enable and reset for a given peripheral.
Add macro table generting implementations of RccPeripheral for peripherals with clock set, currently restricted to SPI.
* SPI write v2 was hanging in write due to an infinite loop
* SPI word write was not followed by a read back
The u8 and u16 write/read logic have been refactored into write_word and
read_word.
In the case where GPIO mapping could look like this:
PA5:
SPI1_SCK: 0
The pin would not get any generated impl because the if expression would evaluate to false. Fix this for all cases in gen.py by comparing against None
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