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My code works with SPI_Spin but not SPI_Asm…
I'm interfacing a Prop with EVE2 based display module.
It's regular SPI, but with 32 bit packet size.
I found the bug (I'm going to call this a bug) in the assembly code, in the MSBFirst_ section:
shl t5, arg3 '' Shift "1" N number of bits to the left.
LSB first works, but MSB first does not for bits=32
This messed me up pretty good, had to break out oscilloscope to figure out what is going on...