Lpc2000

Hi Rolf,

I solved the problem by adding:
PWM0_TC=0x0
after starting TC.

Thank you for your help.

Jack.

--- lpc_bavaria <lpc_bavaria@...> wrote:

> 
> --- Jack Xu <xyxznp@...> wrote:
> 
> > Hi all,
> 
> Hi Jack,
> 
> > REG(PWM0_PCR)=0x7400; /*enable PWM2,4,6, single
> > edge*/
> 
> 0x5400 would be right here (you don't use PWM5)
> 
> 
> > REG(PWM0_TCR)=0x000A; //Reset TC counter
> > 
> > REG(PWM0_MR0)=0x0400; //set up the PWM period
> 
> Please set the value in MR0 *BEFORE* you enable the
> PWM (which you did in the previous access to
> PWMTCR).
> Your PWMMRx values will otherwise never be used!
> See the description of PWMTCR in der User Manual.
> 
> PWMMR0 = 0x0400
> PWMTCR = 0x000A
> 
> 
> > REG(PWM0_LER)|=0x1;//BIT0 Latch the value
> > 
> > REG(PWM0_MR1)=0x0050; //set up initial PWM duty
> > cycle
> > REG(PWM0_LER)|=0x2;//BIT1 latch the value
> > 
> > REG(PWM0_MR2)=0x0100; //set up initial PWM duty
> > cycle
> > REG(PWM0_LER)|=0x4;//BIT2 latch the value
> > 
> > REG(PWM0_MR3)=0x150; //set up initial PWM duty
> cycle
> > REG(PWM0_LER)|=0x8;//latch the value
> > 
> 
> 
> Here you probably want to set the duty cycles of
> PWM2,
> PWM4 and PWM6. But in single edge mode, it's MR2
> that
> controls PWM2! MR4 controls PWM4, and MR6 controls
> PWM6.
> 
> So set:
> PWMMR2 = 0x0050, PWMLER |= 0x04;
> PWMMR4 = 0x0100, PWMLER |= 0x10;
> PWMMR6 = 0x0150, PWMLER |= 0x40;
> 
> 
> Cheers,
> Rolf
> 
> 
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