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[architecture] Require setting SPI config in SpiDevice based drivers #820

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@chris-durand chris-durand commented Feb 5, 2022

PR to move the discussion about a new API for setting the SPI configuration in SpiDevice based device drivers to a different place.

As a first step a new SpiConfiguration struct is added under architecture. Furthermore, modm::SpiDevice will take that config struct as a non-type template parameter and provides a default configureBus() function that applies the settings to the SPI master.

EDIT: this does not work as expected, the platform-specific SpiMaster driver won't accept modm::Spi::DataMode as an argument to SpiMaster::setDataMode(). modm::platform::SpiMaster::DataMode has to be used.

The SPI configuration is specified as a non-type template parameter to
`modm::SpiDevice`. `SpiDevice` will provide a `configureBus()` function
to apply the required mode settings for the device.
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The DataMode type is dependent on the peripheral driver. I have tried to make the config struct a template. Now gcc segfaults:

In file included from main.cpp:14:
modm/src/modm/driver/adc/ads816x.hpp:102:65: internal compiler error: Segmentation fault
  102 |     public modm::SpiDevice<SpiMaster, Ads816xSpiConfig<SpiMaster>>,
      |                                                                 ^~
Please submit a full bug report,
with preprocessed source if appropriate.
See <https://gcc.gnu.org/bugs/> for instructions.
scons: *** [/home/chris/modm/build/nucleo_f429zi/adc_ads816x/scons-release/main.o] Error 1
scons: building terminated because of errors.

😆

@chris-durand
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I found the mistake, now without segfault.

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