Re: port I/O abstraction macros


"Tom Torfs" <tomtorfs@xxxxxxxxx> wrote in message
news:1149274847.733281.46970@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
Everyone,

Earlier I posted some macros that allow you to easily define binary
constants in C (see http://cprog.tomsweb.net/binconst.txt). Playing
similar tricks with the preprocessor, I now created some macros that
allow you to make easy abstraction of port I/O's. It's written for the
MSP430 but the concept can be applied to other embedded architectures.

You simply define your signal location like:
#define LED P1,0
and then use them like:
SETDIR(LED);
CLR(LED);
TOGGLE(LED);

We take on alot of intern students and student projects etc. and I have
always found their ability to do bitwise manipulation in C to be completely
hopeless. What are universities teaching them these days? Its the year 2006
and they still come out knowing how to program an 8051 in assembly but not
knowing what c &= ~(1<<4); does.


.

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