6727 UHPI HPIC

Hello. My name is Don and I have a question about the 6727 UHPI.

I want to use the bit in the HPIC (hint) that the DSP can write to to generate and interrupt in
its host as a simple flag. I have the interrupt pin actually gpio'd and unused. But I thought I
should be able to set the bit in the DSP and let the host see it and reset it it by writing a one
back to the bit.

Well, I can set it from the DSP but I can also write a one to it all day without effect.

Must the interrupt pin be active?

There is also a remark in the pdf about 'acknowledging the interrupt' which I took to mean
handling an interrupt routine, and since there was no such routine there would be nothing to
do. I also searched the pdf to see if there was some place I was supposed to deal with this
interrupt besides the HPIC and I found nothing.

Any thoughts on what I missed or recommendations?

Don Start a New Thread

I found my problem and it had nothing to do with the DSP.
Thank you,
Don

On 2008, Jul, 3, at 3:02 PM, woshidon wrote:

> Hello. My name is Don and I have a question about the 6727 UHPI.
>
> I want to use the bit in the HPIC (hint) that the DSP can write to
> to generate and interrupt in
> its host as a simple flag. I have the interrupt pin actually gpio'd
> and unused. But I thought I
> should be able to set the bit in the DSP and let the host see it and
> reset it it by writing a one
> back to the bit.
>
> Well, I can set it from the DSP but I can also write a one to it all
> day without effect.
>
> Must the interrupt pin be active?
>
> There is also a remark in the pdf about 'acknowledging the
> interrupt' which I took to mean
> handling an interrupt routine, and since there was no such routine
> there would be nothing to
> do. I also searched the pdf to see if there was some place I was
> supposed to deal with this
> interrupt besides the HPIC and I found nothing.
>
> Any thoughts on what I missed or recommendations?
>
> Don
> Start a New Thread