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Timer 1 Interrupt problem in LPC2106

Timer 1 Interrupt problem in LPC2106

2005-02-21 by mannem_sri

Hi,

I am trying to generate an interrupt using Timer1 in LPC2106.

I put 0xff in match register.

The timer is incrementing and restting whenever it matches the match 
register value.

But it is not generating the interrupt when match occurs.

I am running my program from SARM. I have done the memory mapping 
also.

I have written the program with referrence of AN10254.

I am using arm compilers to build the project.

Please help me in getting the interrupt.

If you have anu exampled programs please send it to me.

Thanks in advance.

Regards,
-Srinivas.

RE: [lpc2000] Timer 1 Interrupt problem in LPC2106

2005-02-21 by Milos Prokic

Did you enable the timer interrupt in the timer module?

Did you set the following registers accordingly -  VICIntSelect,
VICIntEnable,  VICVectAddrX ,VICVectCntlX ?

Did you enable the interrupts globally, ie in the core (status register)?

Cheers,

m.

  _____
Show quoted textHide quoted text
From: mannem_sri [mailto:mannem_sri@...] 
Sent: Monday, February 21, 2005 3:31 AM
To: lpc2000@yahoogroups.com
Subject: [lpc2000] Timer 1 Interrupt problem in LPC2106

 


Hi,

I am trying to generate an interrupt using Timer1 in LPC2106.

I put 0xff in match register.

The timer is incrementing and restting whenever it matches the match 
register value.

But it is not generating the interrupt when match occurs.

I am running my program from SARM. I have done the memory mapping 
also.

I have written the program with referrence of AN10254.

I am using arm compilers to build the project.

Please help me in getting the interrupt.

If you have anu exampled programs please send it to me.

Thanks in advance.

Regards,
-Srinivas.








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RE: [lpc2000] Timer 1 Interrupt problem in LPC2106

2005-02-22 by Srinivas

Hi Milos,

Yes, I have enabled the timer interrupt in timer module.

And i have initialized the VIC registers also.

Please have a look at that register values.

/*Timer initialization */

	TIMER1_TCR = 0x0;				// Reset

//	TIMER1_TC = 0x0;				// Timer Counter

	TIMER1_PR = 2500;				// Prescale register

//	TIMER1_PC = 0x0;				// Prescale Counter

	TIMER1_MR0 =1000;				// Match Register

	TIMER1_MCR = 0x3;				// Generate interrupt and reset when match occurs.


	/* Timer 1 interrupt is an IRQ interrupt */
	VICIntSelect &= ~0x20;
  /* Enable timer 1 interrupt */
  	VICIntEnable = 0x20;
  /* Use slot 0 for timer 1 interrupt */
  	VICVectCntl0 = 0x25;
  /* Set the address of ISR for slot 0 */
  	VICVectAddr0 = (unsigned int)IRQHandler;



	MSR cpsr_c,#0x13			// This assembly instruction for enabling the processor
interrupts.

Please have a look at the register values and let me know where i am doing
the mistake.

Thanks in advance.

Regards,
-Srinivas.

Thanks and best regards,
Srinivas,
ARM-ODC,
Tata Elxsi,
Office : +91 80 22979581
Mobile : +91 98802 72705
Show quoted textHide quoted text
-----Original Message-----
From: Milos Prokic [mailto:mproki@...]
Sent: Monday, February 21, 2005 9:58 PM
To: lpc2000@yahoogroups.com
Subject: RE: [lpc2000] Timer 1 Interrupt problem in LPC2106



Did you enable the timer interrupt in the timer module?

Did you set the following registers accordingly -  VICIntSelect,
VICIntEnable,  VICVectAddrX ,VICVectCntlX ?

Did you enable the interrupts globally, ie in the core (status register)?

Cheers,

m.

  _____

From: mannem_sri [mailto:mannem_sri@...]
Sent: Monday, February 21, 2005 3:31 AM
To: lpc2000@yahoogroups.com
Subject: [lpc2000] Timer 1 Interrupt problem in LPC2106




Hi,

I am trying to generate an interrupt using Timer1 in LPC2106.

I put 0xff in match register.

The timer is incrementing and restting whenever it matches the match
register value.

But it is not generating the interrupt when match occurs.

I am running my program from SARM. I have done the memory mapping
also.

I have written the program with referrence of AN10254.

I am using arm compilers to build the project.

Please help me in getting the interrupt.

If you have anu exampled programs please send it to me.

Thanks in advance.

Regards,
-Srinivas.








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RE: [lpc2000] Timer 1 Interrupt problem in LPC2106

2005-02-22 by Milos Prokic

Hey,
Your VIC looks Ok
 so do the registers
 the only thing I see is that you
don’t have a line Timer1_TCR = 0x01 – to enable the timer
 
To enable interrupts you can use the following macro:
#define _EINT()							\
	asm volatile ( "stmdb	sp!, {r0}" );		\
	asm volatile ( "mrs	r0, cpsr" );		\
	asm volatile ( "bic	r0, r0, #0xC0" );		\
	asm volatile ( "msr	cpsr, r0" );		\
	asm volatile ( "ldmia	sp!, {r0}" )
Hope this helps,
m.
		
________________________________________
Show quoted textHide quoted text
From: Srinivas [mailto:srinivasmannem@tataelxsi.co.in] 
Sent: Tuesday, February 22, 2005 12:37 AM
To: lpc2000@yahoogroups.com
Subject: RE: [lpc2000] Timer 1 Interrupt problem in LPC2106

Hi Milos,

Yes, I have enabled the timer interrupt in timer module.

And i have initialized the VIC registers also.

Please have a look at that register values.

/*Timer initialization */

      TIMER1_TCR = 0x0;                        // Reset

//      TIMER1_TC = 0x0;                        // Timer Counter

      TIMER1_PR = 2500;                        // Prescale register

//      TIMER1_PC = 0x0;                        // Prescale Counter

      TIMER1_MR0 =1000;                        // Match Register

      TIMER1_MCR = 0x3;                        // Generate interrupt and
reset when match occurs.


      /* Timer 1 interrupt is an IRQ interrupt */
      VICIntSelect &= ~0x20;
  /* Enable timer 1 interrupt */
        VICIntEnable = 0x20;
  /* Use slot 0 for timer 1 interrupt */
        VICVectCntl0 = 0x25;
  /* Set the address of ISR for slot 0 */
        VICVectAddr0 = (unsigned int)IRQHandler;



      MSR cpsr_c,#0x13                  // This assembly instruction for
enabling the processor
interrupts.

Please have a look at the register values and let me know where i am doing
the mistake.

Thanks in advance.

Regards,
-Srinivas.

Thanks and best regards,
Srinivas,
ARM-ODC,
Tata Elxsi,
Office : +91 80 22979581
Mobile : +91 98802 72705




-----Original Message-----
From: Milos Prokic [mailto:mproki@...]
Sent: Monday, February 21, 2005 9:58 PM
To: lpc2000@yahoogroups.com
Subject: RE: [lpc2000] Timer 1 Interrupt problem in LPC2106



Did you enable the timer interrupt in the timer module?

Did you set the following registers accordingly -  VICIntSelect,
VICIntEnable,  VICVectAddrX ,VICVectCntlX ?

Did you enable the interrupts globally, ie in the core (status register)?

Cheers,

m.

  _____

From: mannem_sri [mailto:mannem_sri@...]
Sent: Monday, February 21, 2005 3:31 AM
To: lpc2000@yahoogroups.com
Subject: [lpc2000] Timer 1 Interrupt problem in LPC2106




Hi,

I am trying to generate an interrupt using Timer1 in LPC2106.

I put 0xff in match register.

The timer is incrementing and restting whenever it matches the match
register value.

But it is not generating the interrupt when match occurs.

I am running my program from SARM. I have done the memory mapping
also.

I have written the program with referrence of AN10254.

I am using arm compilers to build the project.

Please help me in getting the interrupt.

If you have anu exampled programs please send it to me.

Thanks in advance.

Regards,
-Srinivas.








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53580313>



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:HM/A=2343726/rand=260539174>



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