Re: How to determine which ceddk api to use
- From: "Steve Maillet \(eMVP\)" <nospam1@xxxxxxxxxxxxxxxxxxxxxxx>
- Date: Wed, 29 Jun 2005 06:52:28 -0700
READ_PORT_XXX is for accessing device registers in I/O space on the CPU or
bus in question. READ_REGISTER_XXX is for registers or other device access
that is always memory mapped. It's just a pointer de-reference but helps to
clarify that a device register access is the intent instead of just
accessing RAM. Some CPUs and some buses have a separate I/O space
independent from memory. So it's important for portability to use the
correct function type so the system can do the right thing.
--
Steve Maillet
EmbeddedFusion
www.EmbeddedFusion.com
smaillet at EmbeddedFusion dot com
.
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