📄 io-can-ecos-support.html

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>The eCos CAN subsystem supports the BasicCAN and FullCAN mode. The architecture 
and the interface of the eCos CAN driver is quite similar to the eCos serial 
driver and supports the same interface.</P
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>The eCos CAN support for any given platform is spread over a number of different 
packages: </P
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>&#13;This package, <CODE
CLASS="VARNAME"
>CYGPKG_IO_CAN</CODE
>, exports a generic
device independent CAN I/O API for accessing devices attached to a CAN
network. This API handles issues such as locking between threads. The
package does not contain any hardware-specific code. Instead it will
call into a CAN device driver to handle the hardware device
access. This package also defines the inderface that such hardware
drivers should provide.
    </P
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>Each CAN device will have its own device driver, which is implemented 
as a separate package, for example 
<CODE
CLASS="VARNAME"
>CYGPKG_DEVS_CAN_MCF52xx_FLEXCAN</CODE
>. For devices that may 
be attached to a variety of different boards the device driver will be 
generic and a second platform specific package will be used to customize 
it to each platform. For devices that are associated with a specific 
chipset, only a single package may be present.
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>Typically all appropriate packages will be loaded automatically when 
you configure eCos for a given platform. If the application does not use 
any of the CAN I/O facilities, directly or indirectly, then linker garbage 
collection should eliminate all unnecessary code and data. All necessary 
initialization should happen automatically. However the exact details may 
depend on the platform, so the platform HAL documentation should be 
checked for further details.</P
><P
>There is an important exception to this: if the CAN devices are attached 
to an expansion connector, such as PCI, then the platform HAL will not 
know about these devices. Instead the necessary packages will need to be 
added explicitly during configuration.</P
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