On 19 Feb 2004 00:18:41 -0800, domistep@free.fr (domistep) wrote in
comp.dsp:

> Jack Klein <jackklein@spamcop.net> wrote in message news:<hb783096uid7hqladeqcvvfhs7qp17h1nk@4ax.com>...
> > On 18 Feb 2004 16:00:40 -0800, domistep@free.fr (domistep) wrote in
> > comp.dsp:
> > 
> > > Hello,
> > > 
> > > I read the application report of TI about
> > > how Interfacing a ADC to the TMS320F2812  ...
> > > I have a simple question !!!
> > > I didn t understood where i have to connect the 16 bits parallel 
> > > output from the ADC, on the DSP !!!
> > > Does the output of the ADC go on an GPIO configured as input for the
> > > DSP ?
> > > 
> > > thank you
> > > 
> > > jean
> > 
> > You could connect the 16 bit output of the ADC to a 16 bit GPIO port,
> > and use other GPIO lines for control signals to the ADC.
> > 
> > Or if the ADC has three-state outputs, you could connect the 16 bits
> > to the XD15 through XD0 data bus and connect its output enable to the
> > XRD read pin.  Then you would have to program one of the external chip
> > selects, perhaps XZCS0AND1.
> > 
> > That is one of the points of having a part like the 2812 that has a
> > complete 16 bit external bus interface.
> 
> 
> Thank you for your answer ...
> Just to be sure, when you say " connect the 16 bit output of the ADC
> to a 16 bit GPIO port"
> that s mean for instance, i can use for instance the GPIOA0 to the
> GPIOA15 port ?
> If i did well understand the all GPIOA, or GPIOB or GPIOC or GPIOD or
> GPIOE can be configured as input ..
> 
> Thank you

Yes, all GPIO pins can be configured as inputs if you use them in GPIO
mode.  Of course, you can't use them for anything else.

-- 
Jack Klein
Home: http://JK-Technology.Com
FAQs for
comp.lang.c http://www.eskimo.com/~scs/C-faq/top.html
comp.lang.c++ http://www.parashift.com/c++-faq-lite/
alt.comp.lang.learn.c-c++
http://www.contrib.andrew.cmu.edu/~ajo/docs/FAQ-acllc.html

Jack Klein <jackklein@spamcop.net> wrote in message news:<hb783096uid7hqladeqcvvfhs7qp17h1nk@4ax.com>...
> On 18 Feb 2004 16:00:40 -0800, domistep@free.fr (domistep) wrote in
> comp.dsp:
> 
> > Hello,
> > 
> > I read the application report of TI about
> > how Interfacing a ADC to the TMS320F2812  ...
> > I have a simple question !!!
> > I didn t understood where i have to connect the 16 bits parallel 
> > output from the ADC, on the DSP !!!
> > Does the output of the ADC go on an GPIO configured as input for the
> > DSP ?
> > 
> > thank you
> > 
> > jean
> 
> You could connect the 16 bit output of the ADC to a 16 bit GPIO port,
> and use other GPIO lines for control signals to the ADC.
> 
> Or if the ADC has three-state outputs, you could connect the 16 bits
> to the XD15 through XD0 data bus and connect its output enable to the
> XRD read pin.  Then you would have to program one of the external chip
> selects, perhaps XZCS0AND1.
> 
> That is one of the points of having a part like the 2812 that has a
> complete 16 bit external bus interface.


Thank you for your answer ...
Just to be sure, when you say " connect the 16 bit output of the ADC
to a 16 bit GPIO port"
that s mean for instance, i can use for instance the GPIOA0 to the
GPIOA15 port ?
If i did well understand the all GPIOA, or GPIOB or GPIOC or GPIOD or
GPIOE can be configured as input ..

Thank you

On 18 Feb 2004 16:00:40 -0800, domistep@free.fr (domistep) wrote in
comp.dsp:

> Hello,
> 
> I read the application report of TI about
> how Interfacing a ADC to the TMS320F2812  ...
> I have a simple question !!!
> I didn t understood where i have to connect the 16 bits parallel 
> output from the ADC, on the DSP !!!
> Does the output of the ADC go on an GPIO configured as input for the
> DSP ?
> 
> thank you
> 
> jean

You could connect the 16 bit output of the ADC to a 16 bit GPIO port,
and use other GPIO lines for control signals to the ADC.

Or if the ADC has three-state outputs, you could connect the 16 bits
to the XD15 through XD0 data bus and connect its output enable to the
XRD read pin.  Then you would have to program one of the external chip
selects, perhaps XZCS0AND1.

That is one of the points of having a part like the 2812 that has a
complete 16 bit external bus interface.

-- 
Jack Klein
Home: http://JK-Technology.Com
FAQs for
comp.lang.c http://www.eskimo.com/~scs/C-faq/top.html
comp.lang.c++ http://www.parashift.com/c++-faq-lite/
alt.comp.lang.learn.c-c++
http://www.contrib.andrew.cmu.edu/~ajo/docs/FAQ-acllc.html

Hello,

I read the application report of TI about
how Interfacing a ADC to the TMS320F2812  ...
I have a simple question !!!
I didn t understood where i have to connect the 16 bits parallel 
output from the ADC, on the DSP !!!
Does the output of the ADC go on an GPIO configured as input for the
DSP ?

thank you

jean