Hi Louis,
This error means that you're trying to assign a bit position beyond
that supported by the particular IO group. In this case, it's because
the ROACH only has 4 user-accessible LEDs, while the IBOB has 8. So
if you just take out the slices that are giving you trouble, it should
be okay.
Cheers,
Henry
On 8/8/2011 6:20 PM, Louis Dartez wrote:
Hello,
I'm trying to get through the IBOB tutorial...just
to get a bunch of led's lit up. Near the end of designing the model,
when trying to link up 8 slices and gpio blocks i get an error. The
first three sets of slices and gpio's don't give me any trouble..however
when I get to the fourth set I get a dialogue box with the following:
"Gateway bit index contain values that exceeds the bitwidth."
What exactly is it that I'm doing wrong?
ps. This tutorial is originally meant for the iBOB ..but I'm using a
Roach board....I read that simply switching out iBOB:led to ROACH:led on
the registers should suffice...but that may incorrect.
Thanks a bunch for the help!
--
-- Louis Dartez
(956) 372-5812
Arecibo Remote Command Center Scholar
Center for Gravitational Wave Astronomy
University of Texas at Brownsville
