Hi all,
I’m writing a driver for a device
using a plx9080 chip. I’ve implemented
scatter gather DMA.
However when I open the memory mapped
file representing the user buffer I
get a bunch of FF’s.
I’m sure that:
- The hardware input doesn’t contain the FF’s
- The transfer works because I get the exact amount
of data I requested. (Tested both 32KB/64KB requests)
Is there a way to see the internal FIFO? Any other
things that could be wrong?
Thanks in advance,
Kind regards,
Roy