Lpc2000

hello, 

I have a problem the interrupt only work for 16 interrupts, and at 16 
it crash!! if I change the __STACK_SIZE_IRQ__ = 0x100; to 
__STACK_SIZE_IRQ__ = 0x200; (on lpc2119.ld) will crash at 32 
interrupts, anyone can help me!!

I use gnuarm3.4.1 for linux,  LPC2129 and I use the following 
functions for enter and exit in interrupt:

#define ISR_ENTRADA() asm volatile(" sub	r14, r14, #4\n" \
                                   " stmfd	r13!, {r0-r3, r12, r14}\n" 
\
                                   " mrs	r0, spsr\n" \
                                   " stmfd	r13!, {r0}")
#define ISR_SAIDA()  asm volatile(" mrs	r0, cpsr\n" \
				" orr	r0, r0, #0xC0\n" \
				" msr	cpsr_c, r0\n" \
                                " ldmfd	r13!, {r0}\n" \
				" msr	spsr_cxsf, r0 \n"\
                                " ldmfd	r13!, {r0-r3, r12, PC}^")
  
and the  following code: 

...
VICVectAddr5 = (u32)captura;
....

void captura(void){
	ISR_ENTRADA();
	
	
	escreve_UART0("EI");
	if(T1IR & TIR_MR0I){

		T1IR |= TIR_MR0I;
		Timer1OverflowCount++;

	}else if(T1IR & TIR_CR0I){
	
		T1IR |= TIR_CR0I;
	      escreve_UART0("1");
		
		
	}else if(T1IR & TIR_CR1I){
	
		T1IR |= TIR_CR1I;
		escreve_UART0("2");
	}
	
	VICSoftIntClr = (1<<VIC_TIMER1);
	VICVectAddr = 0x00000000;            
	escreve_UART0("SI\n");
	ISR_SAIDA();                          
}

I think the problem can be on ISR_ENTRADA(); and ISR_SAIDA(); because 
do not decrement the stack pointer what do you think?

regards,
Domingos Bento

 
 
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