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Interrupt with avr32 port

Posted by Jesper Vestergaard on August 5, 2009
I'm using the avr32 port for ap7000 and have made a interrupt that turns a led on and off.
Here's the code:

void isr_test(void)
{
portENTER_SWITCHING_ISR1();

volatile struct avr32_pio_t *pioa = &AVR32_PIOA;
int status;

status = pioa->pdsr;
status = pioa->isr;

if(status & 0x00000400)
{

controlLED(1, LED_ON);
}
else
{
controlLED(1, LED_OFF);
}

portEXIT_SWITCHING_ISR1();
}


I activate interrupts with:

INTC_register_interrupt( &isr_test, AVR32_PIOA_IRQ, AVR32_INTC_INT1);
gpio_set(&AVR32_PIOA, 10, GPIO_INTERRUPT, GPIO_ON);
gpio_set(&AVR32_PIOA, 11, GPIO_INTERRUPT, GPIO_ON);


The interrupt works fine and the led turns on and off. But if I press the buttons repeatedly the I suddenly get and unrecoverable exception. I have even tried that the watchdog expires and the debuger quits. Here's the output from gdb after a unrecoverable exception:

0x00013400 in _handle_Unrecoverable_Exception ()
(gdb) bt
#0 0x00013400 in _handle_Unrecoverable_Exception ()
#1 0x48c10230 in ?? ()
(gdb) regs
pc: 00013400 lr: 48c10230 sp: 00000044 r12: c0623002
r11: 3003a122 r10: 0230cfe3 r9: 489f0000 r8: 24007ff0
r7: 00000008 r6: 48ed48f0 r5: e3b00001 r4: d553fece
r3: fffa48df r2: 48d048e1 r1: 0230c062 r0: 48d2a505

Is there something wrong with my interrupt function or is there something else that could be causing the problem?

RE: Interrupt with avr32 port

Posted by Jesper Vestergaard on August 10, 2009
Can someone please comment on my use of portENTER_SWITCHING_ISR. Is it correct to use the macro in an interrupt?


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