Hi,

Currently LSBFIRST and MSBFIRST is interpreted as byte order when handling SPI transfers, and only used for transfer16 (swapping byte A, B -> B, A).

Unfortunately I believe this is wrong, it should be interpreted as bit order, affecting the transfer order of the bits for each byte in all transfers - e.g. whether to transfer the 8 bits of 0xA0 as 1010 0000 or 0000 0101.

Some more detail (code examples, logic analyzer capture) can be found in https://forum.sparkfun.com/viewtopic.php?f=169&t=58885&p=238325

Thank you,
Andreas