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Fix STM32 CAN reset to not lose context #4932

Merged
merged 6 commits into from
Sep 20, 2017
Merged

Fix STM32 CAN reset to not lose context #4932

merged 6 commits into from
Sep 20, 2017

Commits on Sep 5, 2017

  1. STM32: move can_s definition to common_objects.h 

    This will ease up further changes to the structure.
    @LMESTM
    LMESTM committed Sep 5, 2017
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  2. STM32: Define CAN handle as part of can object 

    Instead of a static object, this will make driver
instantiation more robust and allow to re-use init
configuration on a need basis.

The CANName struct member is actually the CAN registers base address,
which is now available in the CanHandle.Instance field, so we don't need
CANName anymore.
    @LMESTM
    LMESTM committed Sep 5, 2017
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  3. STM32: CAN: do not overwite BTR register when setting frequency 

    BTR register has other bits than the ones calculated and set through
the can_speed function, so let's take care to only write to the
right registers.
    @LMESTM
    LMESTM committed Sep 5, 2017
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  4. STM32: CAN: store the mode in object context 

    In order to apply the same mode in case of reset, we store the current
requested mode in the HAL structure.

To make storage in a single place, we also change can_monitor to call
can_mode function as they actually acting on same registers.
    @LMESTM
    LMESTM committed Sep 5, 2017
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  5. STM32: CAN: restore registers after can_reset 

    After reset the MCR register content needs to be restored so we're
introducing the can_registers_init function to be called at the first
init stage, but also after reset. We also store the can frequency to
go through the initialisation phase again.
    @LMESTM
    LMESTM committed Sep 5, 2017
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  6. STM32: F2: put can_s struct under DEVICE_CAN option 

    In case of F2 devices without CAN support.
    @LMESTM
    LMESTM committed Sep 5, 2017
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