Contiki 2.6
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00001 volatile unsigned int pit_count = 0; 00002 00003 static void NACKEDFUNC ATTR system_int (void) { /* System Interrupt Handler */ 00004 00005 ISR_ENTRY(); 00006 00007 if (*AT91C_PITC_PISR & AT91C_PITC_PITS) { /* Check PIT Interrupt */ 00008 pit_count++; 00009 /* 00010 if ((pit_count % 100) == 0) { 00011 unsigned int led_state = (pit_count % 300) / 100; 00012 *AT91C_PIOA_ODSR = ~(1<<led_state); 00013 } 00014 */ 00015 00016 *AT91C_AIC_EOICR = *AT91C_PITC_PIVR; /* Ack & End of Interrupt */ 00017 } else { 00018 *AT91C_AIC_EOICR = 0; /* End of Interrupt */ 00019 } 00020 00021 ISR_EXIT(); 00022 }