On Fri, 29 Sep 2006, suptouch wrote:
> Dear eddy,
>
> I've try to drive only the bit of my test i/o but no thing, it's why I
> drive all the i/o... and I can seem some i/o work !
so you think driving ALL will somehow magically make it work!!
I'm guessing you are a student doing some project - I've seen students
program randomly like this and make very slow progress. But doing it with
hardware can be more dangerous :-)
There is a reason you are advised not to write to all the bits - some bits
of some ports are used for other purposes - this brute force method
will interfer with them.
Take a deep breath - alter you program to output to one bit of one port
only, taking on board all the advice given here. Get that to work first.
>
> --- In "Eddie Dawydiuk" <> wrote:
> >
> > Hello,
> >
> > > I've made a small program to test the i/o of the DIO1 header on my
> > > TS7300 on output mode. I generate a 0.5Hz signal on each port, and the
> > > result is :
> >
> > It looks like you are driving every bit in portb,e,c,& f high then low.
> > You should only be modifying the bits that correspond to the GPIO pins.
> >
> > //Eddie
>
>
>
>
>
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