SPI Communication Issue

Document created by analog-archivist Employee on Feb 23, 2016
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I have a problem with SPI communication between two ADUC7060, I am debugging
with IAR 6.30, and SPITX register is always 0x00000000, and the IRQ work


This may not show an issue. When you write to the SPITX register in master
mode, you are loading the FIFO.
The contents of the FIFO are then moved to a bi-shift register and clocked out
of the part.
Once the byte has been transmitted, the FIFO will be empty and the SPITX
register will return to a default value.

Do you see the correct value clocked on the MOSI pin? Are the 8x clocks visible
on a scope?