Lpc2000

Hello group,

I have one problem in capture of PWM, i.e, sometimes exist missing the
capture of PWM.
I'm using the LPC2129!! 

My interrupt function is the following  




void capture (void) {

	
	if(T1IR & TIR_CR0I){		//interrupt no chanel0 (eixo dos xx)
	   T1IR = TIR_CR0I;	   
	   
	   acel_cap_eixo_x();


	}

	if(T1IR & TIR_CR1I){		//interrupt no chanel1 (eixo dos yy)
	   T1IR = TIR_CR1I;	   

	   acel_cap_eixo_y();


	}

	if(T1IR & TIR_CR2I){		//interrupt no chanel2 (eixo dos zz)
	  T1IR = TIR_CR2I;		//clear flag interrupt	   
	  acel_cap_eixo_z();


	}

	VICVectAddr = 0xFFFFFFFF;
}


void acel_cap_eixo_x(void){
   u32 tpu; 

	if(IOPIN0 & ACEL_asc_x){	//verify if rising edge
	   tpu=T1CR0;
	   INS_ACEL_write(0, ((ACEL_T2_x-ACEL_T1_x)<<12)/(tpu-ACEL_T1_x));
	   ACEL_T1_x=tpu;
		
	}else{				//falling edge
	   ACEL_T2_x = T1CR0;
	}
return;
} 



Someone has some suggestion for this problem!!!


Thanks
      Domingos
_________________________________________________________
CEAC Cursos de forma\ufffd\ufffdo profissional - pe\ufffda informa\ufffd\ufffdes aqui.:
http://ceac.online.pt/

Take a look at the PWM.1 Errata.  I did not see LPC2129 Erratasheet 
on the web, but bug should be the same as published in Erratasheets 
for other members of this family.


--- In lpc2000@yahoogroups.com, dasbento@a... wrote:
> Hello group,
> 
> I have one problem in capture of PWM, i.e, sometimes exist missing 
the
> capture of PWM.
> I'm using the LPC2129!! 
> 
> My interrupt function is the following  
> 
> 
> 
> 
> void capture (void) {
> 
> 	
> 	if(T1IR & TIR_CR0I){		//interrupt no chanel0 (eixo 
dos xx)
> 	   T1IR = TIR_CR0I;	   
> 	   
> 	   acel_cap_eixo_x();
> 
> 
> 	}
> 
> 	if(T1IR & TIR_CR1I){		//interrupt no chanel1 (eixo 
dos yy)
> 	   T1IR = TIR_CR1I;	   
> 
> 	   acel_cap_eixo_y();
> 
> 
> 	}
> 
> 	if(T1IR & TIR_CR2I){		//interrupt no chanel2 (eixo 
dos zz)
> 	  T1IR = TIR_CR2I;		//clear flag interrupt	   
> 	  acel_cap_eixo_z();
> 
> 
> 	}
> 
> 	VICVectAddr = 0xFFFFFFFF;
> }
> 
> 
> void acel_cap_eixo_x(void){
>    u32 tpu; 
> 
> 	if(IOPIN0 & ACEL_asc_x){	//verify if rising edge
> 	   tpu=T1CR0;
> 	   INS_ACEL_write(0, ((ACEL_T2_x-ACEL_T1_x)<<12)/(tpu-
ACEL_T1_x));

> 	   ACEL_T1_x=tpu;
> 		
> 	}else{				//falling edge
> 	   ACEL_T2_x = T1CR0;
> 	}
> return;
> } 
> 
> 
> 
> Someone has some suggestion for this problem!!!
> 
> 
> Thanks
>       Domingos
> _________________________________________________________
> CEAC Cursos de formação profissional - peça informações aqui.:
> http://ceac.online.pt/