Lpc2000

I still can't get it running. Karl showed me the way to understand 
the docu - at least I felt like understanding it...
Current code status:

//testing PWM4
  PINSEL0 |= 0x20000;   // select pin 0.08 PWM4 function
  
  PWM_PR  = 0x0000;    	// max prescale counter value
  PWM_MCR = 0x0002;   	// reset TC when PWMMR0 matches
  PWM_PCR = 0x7E00;   	// enable all PWM just to get the right one
  PWM_TCR = 0x000A;	// reset TC counter (not yet needed?!)
  
  PWM_MR0 = 0x0400;    	// match register 0 trigger value
  PWM_LER |= BIT0;
  
  PWM_MR4 = 0x0150;	// match register 4 trigger value
  PWM_LER |= BIT4;		
  
  PWM_TCR = 0x0009;    	// set the TC counter and enable the PWMs

But still getting the single 88.64 ms pulse.
Any idea?

Cheers, Kurt.


--- In lpc2000@yahoogroups.com, "Karl Olsen" <kro@p...> wrote:
> --- In lpc2000@yahoogroups.com, "killtheclock" <kurt.westphal@g...> 
> wrote:
> 
> > I have an olimex lpc2106-mt pcb and try to program a PWM without 
> > success. The Docu is not especially detailed (I think). I tried a 
> lot 
> > of register settings(for hours). All I get is a single 88.64 ms 
> pulse 
> > on PWM4 at reset that does not change with the match register or 
> pre-
> > scaler value.
> > 
> > This code is one example that illustrates my understanding of 
that 
> > thing:
> > //testing PWM4
> >   PINSEL0 |= 0x20000;   // select pin 0.08 PWM4 function
> >   PWM_PR  = 0x0000;    // max prescale counter value
> >   PWM_MCR = 0x0002;   // reset when PWMMR0 matches
> >   PWM_PCR = 0x1000;   // PWM4 enable, single edge
> >   PWM_MR0 = 0x0f00;    // match register trigger value
> >   PWM_TCR = 0x0009;    // set the TC counter and enable the PWMs
> > 
> > I would expect a 1.92 kHz frequency from that...
> > Obviously I do something completly wrong.
> 
> You also need to set PWM_MR4, and then PWM_LER before the PWM_MRx 
> values take effect.
> 
> Karl Olsen