I/O setup.
- the pd() module has a new method (board) and gets it CPU, platform and board name directly from the build system (command line macros). It's much easier to work like this.
- the samples (examples/) were updated to check pd.board() rather than pd.platform()/pd.cpu(), which is a much more logical way to do things, since it ties the sample to a
specific I/O configuration, not with a CPU.
- updated PWM code for AT91SAM7X, now the "piano" example works for both LM3Sxxxx and AT91SAM7X256.
- added 3 new methods to the PIO module: pullup(), pulldown(), ad nopullup(), their meaning is obvious.
This takes care of my LPC2888 board (any many other board out there)
that have RAM both on the CPU itself and on a separate chip.
To use it add "allocator=tlsf" to your scons build command.
Even though the code for all the platform was modified, the new code
should not modify the "old" allocator behaviour.
Also added a new "mem" command to the shell, it gives information about
the current RAM state (total, used, free).
NOT YET TESTED !!! So use with care.
* platform()/cpu() returns the platform/cpu name, respectively
(instead of previously name()/cpu())
* platform interface is platform_pd_get_<cpu/platform/cpu_clock>
pd.name() is still defined to keep compatibility with samples on the
web site. It would be best for sample programs to be part of the repository
so they could be kept aligned with the code they demonstrate.
