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Altera_Forum's avatar
Altera_Forum
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20 years ago

NIOS II Problem with Interrupt Timer

I'm using the Cyclone II Development Kit. Using SOPC builder I added a timer to the NIOS2 in "standard" project. I configured the timer to be an Interrupt timer with a period of 500 microsecond...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

I used something like 

  /* set to free running mode */
  IOWR_ALTERA_AVALON_TIMER_CONTROL (HIGH_RES_TIMER_BASE, 
            ALTERA_AVALON_TIMER_CONTROL_ITO_MSK  |
            ALTERA_AVALON_TIMER_CONTROL_CONT_MSK |
            ALTERA_AVALON_TIMER_CONTROL_START_MSK);
  /* register the interrupt handler, and enable the interrupt */
    
  alt_irq_register (HIGH_RES_TIMER_IRQ, NULL, handle_timer_interrupt);

to program the highres timer in the standard example... It worked for me.

Paolo