Sam Nelson

EPORT GPIO on MCF5282

Discussion created by Sam Nelson on Sep 14, 2007
Latest reply on Sep 17, 2007 by Sam Nelson
I'm trying to use the EPORT IRQ1 pin as a general purpose input on an MCF5282, but the input is always the same when I read the EPPDR register, regardless of the physical state of my switch.  I found this thread on the forums stating that I/O gets redirected to port NQ on the 5213, but the 5282 user manual doesn't specify an address for port NQ (although it does refer to port NQ several times) and I don't see it in any header files for the 5282. 

I leave the EPORT module in its reset state, which if I understand correctly, should be configured for general purpose input on the pins, which is what I want.

Do I need to use a different register to read an input from the EPORT module?  If so, which register at what address?

Thanks!

Outcomes