Re: [bascom] duel interupt

["devidas bhonde" <devidasbhonde@hotmail.com>]

Thank you Tobias,

Yes. the isr of serial is long. (manual inching of valve etc )

I read about the 8052 intrrupt priorities. But they seem above me :-)
Couldn't make out whats written. I am trying some more.
Do you know of any ebook for 8052 ? with examples and all ?

Regards,

Devidas

> From: Tobias Reneskog <reneskog@swipnet.se>
> Reply-To: bascom@grote.net
> To: bascom@grote.net
> Subject: Re: [bascom] duel interupt
> Date: Fri, 31 Aug 2007 22:13:52 +0200
>
> Does the serial interrupt take long to execute?
> Unless timer0 has higher priority, it won't interrupt the serial isr.
> So if the serial isr takes several mS to execute, you will miss some 
> interrupts from timer 0.
> If possible, make the timer 0 isr execution time shorter than the time it 
> takes to send one character (rs232), and set timer 0 to a higher priority 
> than the uart. This way you won't miss any characters even if you flood the 
> serial port. Unless the serial isr itself takes longer to execute than it 
> takes to send one character.
>
> Hope that wasn't too messy. I'm really too tired to write anything that 
> makes sense right now...
>
> Regards
> Tobias
>
>
> devidas bhonde wrote:
> > Hi,
> >
> > I am using interrupt based rs232 link to pc.
> >
> > There is also timer 0 used as millisec clock for a solenoid valve.
> >
> > Independently both work fine.
> >
> > but while timer is working, if I send data to the 8052, the timer stops 
> > for that duration.
> >
> > Something to do with interrupt priorities ?
> >
> > Please suggest me something...
> >
> > Regards,
> >
> > Devidas
> >
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