Lpc2000

I have a problem with capture 0.0 channel in lpc2214. 
There is no interrupt?
What is wrong the following code?

void initTimer0(void)
{
	PINSEL0 |= 0x00000020;
	// setup Timer 0 to count forever
	T0TCR = TCR_RESET;                    // reset &
disable timer 0
	T0PR = T0_PCLK_DIV - 1;               // set the
prescale divider
	T0MCR = 0;                            // disable
match registers
	T0CCR = 0x05;         // capture mode
enabled,risingedge
	T0EMR = 0;                            // disable
external match register
  
  	VICIntSelect &= ~VIC_BIT(VIC_TIMER0);  		//
selected as IRQ
  	VICVectAddr2 = (unsigned long)tc0_isr;  	// set
interrupt vector in 2
	VICVectCntl2 = VIC_ENABLE | VIC_TIMER0; 	// use it
for Timer 0 Interrupt
	VICIntEnable |= VIC_BIT(VIC_TIMER0);    	// Enable
Timer0 Interrupt
	
	T0TC = 0;
	T0CR0 = 0;
	T0TCR = TCR_ENABLE;                   		// enable
timer 0
}

void tc0_isr(void) __irq
{
	if (T0IR & 0x10)
	{
		T0IR = 0x10;
        }
	VICVectAddr = 0;	// Acknowledge Interrupt
}

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Do you have properly setup exceptions vector table?
Do you have properly configure MEMAP?
Are you sure that you enter main() with "I" bit in
CPSR cleared?

Here are some other minor remarks:

The code:
PINSEL0 |= 0x00000020;
is better(safer) to look like this:
PINSEL0 = (PINSEL0 & (~0x30)) | 0x00000020;

Here you don't need read-modify-write:
VICIntEnable |= VIC_BIT(VIC_TIMER0);
Simple put:
VICIntEnable = VIC_BIT(VIC_TIMER0);


Regards
Zdravko


--- Mukadder CEYHAN <mukadder_c@...> wrote:

> I have a problem with capture 0.0 channel in
> lpc2214. 
> There is no interrupt?
> What is wrong the following code?
> 
> void initTimer0(void)
> {
> 	PINSEL0 |= 0x00000020;
> 	// setup Timer 0 to count forever
> 	T0TCR = TCR_RESET;                    // reset &
> disable timer 0
> 	T0PR = T0_PCLK_DIV - 1;               // set the
> prescale divider
> 	T0MCR = 0;                            // disable
> match registers
> 	T0CCR = 0x05;         // capture mode
> enabled,risingedge
> 	T0EMR = 0;                            // disable
> external match register
>   
>   	VICIntSelect &= ~VIC_BIT(VIC_TIMER0);  		//
> selected as IRQ
>   	VICVectAddr2 = (unsigned long)tc0_isr;  	// set
> interrupt vector in 2
> 	VICVectCntl2 = VIC_ENABLE | VIC_TIMER0; 	// use it
> for Timer 0 Interrupt
> 	VICIntEnable |= VIC_BIT(VIC_TIMER0);    	// Enable
> Timer0 Interrupt
> 	
> 	T0TC = 0;
> 	T0CR0 = 0;
> 	T0TCR = TCR_ENABLE;                   		// enable
> timer 0
> }
> 
> void tc0_isr(void) __irq
> {
> 	if (T0IR & 0x10)
> 	{
> 		T0IR = 0x10;
>         }
> 	VICVectAddr = 0;	// Acknowledge Interrupt
> }
> 
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> 


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