I've been playing with software and hardware for 30+ years,
but I'm new to Linux and embedded Linux systems. The code
snippets I've been able to find for GPIO access all seem use
file I/O functions. I've never seen this approach before --
I'm accustomed to reading and writing processor registers.
The file I/O approach seems strange to me, but I'm new here,
and there's a /lot /that seems strange.
You may be more comfortable using the GPMC bus for memory-mapped byte
I/O, rather than the bit-wise GPIO interface. It's much faster too.
- Mike
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