Embedded interrupt

Hi,

Could anyone know whether it is possible to enable and use embedded
interrupt in AVR ATMega using GCC? If yes, how to determine the
interrupt priority?

Thanks!

> interrupt in AVR ATMega using GCC? If yes, how to determine the
> interrupt priority?

Not sure what you're asking here exactly - interrupt priority in the AVR
series is determined by hardware. Vectors lower in memory have higher
priority.

On 24 Jul 2004 03:03:17 -0700, leonlai2k@yahoo.com (terry) wrote:

>Hi,
>
>Could anyone know whether it is possible to enable and use embedded
>interrupt in AVR ATMega using GCC? If yes, how to determine the
>interrupt priority?
>

Hi,

The interrupt priorities on the AVR is fixed. If you want to change
this you need to play around with enableing/disabling interrupts
inside interrupt routines. Get the avr-libc documentation
http://www.nongnu.org/avr-libc/

Regards
   Anton Erasmus

Answer: Use sei() inside ISR.

> Could anyone know whether it is possible to enable and use embedded
> interrupt in AVR ATMega using GCC? If yes, how to determine the
> interrupt priority?

GCC can be used to write interrupts for an AVR - see
http://www.freertos.org/implementation/a00012.html for an example.
The priority is set by the hardware however.