Lpc2000

--- In lpc2000@yahoogroups.com, "rtstofer" <rstofer@p...> wrote:
>
> --- In lpc2000@yahoogroups.com, "tphatrapornnant" <tp35@l...> 
wrote:
> >
> > Hi all,
> > 
> > I'm using Ashling EVBA7 Philips LPC2100 Evaluation board 
> (LPC2106). I 
> > got a problem about using GPIO P0.16-P0.31 as general 
> input/output. I 
> > set some of these pins (P0.16-P0.31) as I did on P0.0-P0.15 pins 
> which 
> > all were used and worked correctly. For P0.16-P0.31, it didn't 
> work. I 
> > set pins to be output as the following:
> > 
> > PINSEL0 &= ~P15;
> > IODIR |= P15;
> > IOSET = P15; 
> > 
> > PINSEL1 &= ~P26;
> > IODIR |= P26;
> > IOSET = P26;   
> > 
> > Both pins worked correctly on Keil simulator (I toggled both 
pins 
> > with '1' and '0' in while loop) but only P0.15 could toggle on 
the 
> > real H/W.
> > 
> > Did I forget somethings? Does anyone have a clue?
> > 
> > Thanks,
> > 
> > Teera.
> >
> 
> I'm not really a fan of PINSELx &= ~PIN# - I can't see the bit 
> pattern and I doubt that it works.  I much prefer to do a #define 
> <bit pattern name> <hex pattern> and then use that to set the bits.
> 
> However, I think the real problem is that there is no ~P26 in 
> PINSEL1, it should PROBABLY be the same pattern as ~P15.  Each pin 
> select register only controls 16 pins.

NUTS!  There is no way it should be the same pattern as ~P15.  In 
fact, I don't even want to go there.  Just create a proper bit 
pattern and use it.  Then you know you are setting the proper bits 
to the proper state.


> 
> Richard
>