arch/risc-v/src/mpfs/mpfs_corespi.c: Add support for multiple bit widths #326
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The corespi fpga block supports just one frame length, which is defined when the block is instantiated on the FPGA. This adds support for emulating different frame lengths if they are multiples of 8-bit. That is, with 8-bit corespi one can do 8,16 and 24-bit transfers. This is implemented by simply writing several 8-bit frames for a single word when needed. Signed-off-by: Jukka Laitinen <[email protected]>
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The corespi fpga block supports just one frame length, which is defined when the block is instantiated on the FPGA.
This adds support for emulating different frame lengths if they are multiples of 8-bit. That is, with 8-bit corespi one can do 8,16 and 24-bit transfers.
This is implemented by simply writing several 8-bit frames for a single word when needed.