Just added to the cvs tree.
No any changes required. (just update your cvs copy, do not forget '-d' flag.
gcc and libc. gcc received a significant improvement to bitfield operations.
Recompile. have fun.)
The declaration is _slightly_ different than suggested.
Please check <msp430/iostructures.h>
Please also read 'devheaders' file in msp430-libc/doc.
~d
On Monday 09 December 2002 16:58, Dmitry wrote:
> Folks,
> I am thinking of changind some io API (not really changing, but
> extensions). So, will it worth if we declare ports as structures:
> ---------------------------------------------------------------------------
>------------ typedef union port {
> volatile unsigned char reg_p;
> volatile struct {
> unsigned __p0:1, __p1:1, __p2:1, __p3:1, __p4:1, __p5:1, __p6:1,
> __p7:1; } __pin;
> } ioport_t;
>
> #define pin0 __pin.__p0
> #define pin1 __pin.__p1
> #define pin2 __pin.__p2
> #define pin3 __pin.__p3
> #define pin4 __pin.__p4
> #define pin5 __pin.__p5
> #define pin6 __pin.__p6
> #define pin7 __pin.__p7
>
> typedef struct {
> ioport_t in, out,dir,ifg,ies,ie,sel;
> } xport_t;
>
> xport_t port0 asm("0x10");
> /// and so on...
> ----------------------------------------------------------------------
> So, user can write:
> port0.out.pin1 = 1;
> xxx = port0.in.pin2;
> port0.reg_p = 0x7e;
> or something.
>
> Of course this will not discard existing declarations.
>
> If we're going to add this declaration to header files, we need to choose a
> name for portX. Will 'port0 .. port6' be suitable for it?
>
> Or just forget about it?
>
> ~d
>
>
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