Re: [bascom] duel interupt

[Tobias Reneskog <reneskog@swipnet.se>]

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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