ISR problem in MSP430 using IAR

When my ISR looks like this, all is fine:

#pragma vector=0x00
__interrupt void basic_timer(void)
{
    LPM3_EXIT;   /* exit from low power mode 3 */
}

However, when I attempt to place ANY extra lines of code in the
basic_timer() function, then I get the following error:

"Error[e16]: Segment CODE (size: 0x1008 align: 0x1) is too long for
segment definition. At least 0x4a more bytes needed. The problem..."

How the heck do I fix this? I did a keyword search in the compiler
manual, but i couldn't find the description!
Thanks,
Mike

> When my ISR looks like this, all is fine:
> 
> #pragma vector=0x00
> __interrupt void basic_timer(void)
> {
>     LPM3_EXIT;   /* exit from low power mode 3 */
> }
> 
> However, when I attempt to place ANY extra lines of code in the
> basic_timer() function, then I get the following error:
> 
> "Error[e16]: Segment CODE (size: 0x1008 align: 0x1) is too long for
> segment definition. At least 0x4a more bytes needed. The problem..."
> 

It looks like your vector is wrong. Have a look in the appropriate 
headerfile and use the defined vectors.
For the F149 the BasictimerIrqvector is 0xFFE0
So it should look like:


#include <io430x41x.h>

#pragma vector=BASICTIMER_VECTOR
__interrupt void basic_timer(void)
{
     LPM3_EXIT;   /* exit from low power mode 3 */
}


Kind regards
Holger

I put the correct vector in eventually:

 #pragma vector=BASICTIMER_VECTOR
 __interrupt void basic_timer(void)
 {
      LPM3_EXIT;   /* exit from low power mode 3 */
 }
 

That one-liner above links properly with XLINK. However, if I add more
lines to the function, then i get the Error[e16]: Segment
DATA16_Z(size:0xf2 align:0x1) is too long for segment definition. At
least 0x71 more bytes needed.

I have no idea how to fix this. I tried making a function call called
my_isr_handler(), and that be the one line "my_isr_handler();" called
in the ISR above, hoping there would be a jump to that function, yet i
still get an error.







Holger Schaefer <stuff@ingenieurdienstleistungen.de> wrote in message news:<Xns94AB57645223stuffingenieurdie@62.153.159.134>...
> > When my ISR looks like this, all is fine:
> > 
> > #pragma vector=0x00
> > __interrupt void basic_timer(void)
> > {
> >     LPM3_EXIT;   /* exit from low power mode 3 */
> > }
> > 
> > However, when I attempt to place ANY extra lines of code in the
> > basic_timer() function, then I get the following error:
> > 
> > "Error[e16]: Segment CODE (size: 0x1008 align: 0x1) is too long for
> > segment definition. At least 0x4a more bytes needed. The problem..."
> > 
> 
> It looks like your vector is wrong. Have a look in the appropriate 
> headerfile and use the defined vectors.
> For the F149 the BasictimerIrqvector is 0xFFE0
> So it should look like:
> 
> 
> #include <io430x41x.h>
> 
> #pragma vector=BASICTIMER_VECTOR
> __interrupt void basic_timer(void)
> {
>      LPM3_EXIT;   /* exit from low power mode 3 */
> }
> 
> 
> Kind regards
> Holger

> It looks like your vector is wrong. Have a look in the appropriate 
> headerfile and use the defined vectors.
> For the F149 the BasictimerIrqvector is 0xFFE0
> So it should look like:
> 
> 
> #include <io430x41x.h>
> 
> #pragma vector=BASICTIMER_VECTOR
> __interrupt void basic_timer(void)
> {
>      LPM3_EXIT;   /* exit from low power mode 3 */
> }
> 
> 

Actually, I realized that I can add more lines to my isr. I found that
the problem is that in the ISR, I access and change members of an
array of structs. I guess I am violating some fundamental rule of
MSP430 RAM allocation. But I still don't know how to correct it. Any
hints?

>Actually, I realized that I can add more lines to my isr. I found that
>the problem is that in the ISR, I access and change members of an
>array of structs. I guess I am violating some fundamental rule of
>MSP430 RAM allocation. But I still don't know how to correct it. Any
>hints?

It might be easier to give hints if people can se what you are doing. Try
posting your code.

garykato@aol.com (Gary Kato) wrote in message news:<20040315122654.06566.00001408@mb-m25.aol.com>...
> >Actually, I realized that I can add more lines to my isr. I found that
> >the problem is that in the ISR, I access and change members of an
> >array of structs. I guess I am violating some fundamental rule of
> >MSP430 RAM allocation. But I still don't know how to correct it. Any
> >hints?
> 
> It might be easier to give hints if people can se what you are doing. Try
> posting your code.

I just found out that I was using the default processor in the
compiler, which allows much less RAM than I thought.

What I did get out of my correspondence with IAR though is that
printf() uses a lot of CSTACK size. For my MSP430F412 that i'm using,
i can have 128 bytes of global RAM, the other is used for auto
variables and stack. The code is rather simple, and useless to post
now that I was doing something wrong the whole time. When i get to
work tomorrow, i'll look at another workaround that was proposed to me
to manually increase stack space, which i'm sure many of you already
know how.