Lpc2000

I don't want to define DC1 = 20 inside the IRQfunction. That works
already. I want to use the value of DC1 = 90 instead that is defined a
a global,

Already changed int to unsigned long because I also have defined some
other variables that way which I can manipulate with another
IRQfunction. But the results are the same.

--- In lpc2000@yahoogroups.com, "charlesgrenz" <charles.grenz@s...> wrote:
> 
> Hi guys, just a thought, try this instead
> 
> volatile unsigned long DC1 = 90;
> 
> void IRQfunction(void)
> {
>    DC1 = 20;
> 
> }
> 
> regards,
> Charles
> 
> --- In lpc2000@yahoogroups.com, "ed_hage" <ed_hage@y...> wrote:
> > 
> > Latest update:
> > 
> > When I reassign a value to DC1 in the function it works, example:
> > 
> > int DC1 = 90;
> > 
> > void IRQfunction (void)
> > {
> >   DC1 = 20;
> >   PWM_MR4 = (PWM_MR0 * DC1) / 100; 
> >   ... etc
> > 
> > Now I get a 20% DC, but when I comment out DC1 =20; I should get a 90%
> > DC (as specified before) but then I get a constant high output!!
> > How can I get the global to work?
> > 
> > (P.S. I also posted this question on the gnuarm group because I
> > suspect this may not be a typical LPC problem but maybe a gnu-issue)
> >  
> > > That's the point. I have it already running hard coded! I have a
> > > simular setup in a PWM_Init () function and I get great 5% DC on my
> > > output-pin  when I have the following:
> > > 
> > > PWM_MR4 = (PWM_MR0 * 5) / 100; 
> > > 
> > > Also tried (DC1 defined in the function):
> > > int DC1 = 5;
> > > PWM_MR4 = (PWM_MR0 * DC1) / 100; 
> > > 
> > > and that works, but what I want and does not work is defining
DC1 as a
> > > global (outside the function) so I can change it with other
functions.
> > > How can I solve this problem 
> > > 
> > > (we have evolved to a problem that has nothing to do with floats
> > > anymore ;-} )