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Altera_Forum
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17 years ago

Interrupts and RTOS on NiosII

Hi, I'm using the Cyclone III NiosII Embedded Evaulation Kit (NEEK) as a basis for a custom embedded processor design. When using the uC RTOS (necessary for use with the Altera Triple speed Ethern...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
17 years ago

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Hi,

I'm using the Cyclone III NiosII Embedded Evaulation Kit (NEEK) as a basis for a custom embedded processor design. When using the uC RTOS (necessary for use with the Altera Triple speed Ethernet soft MAC core), is it still possible to service an external interrupt (generated on a regular basic - say every 250usec) with minimal latency?

Tim

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Yes it is possible to service an external interrupt. I have used alt_irq_register () call to register external interrupts (please note that you must experiment with the interrupt width to arrive at an appropriate width to register the irq). The control is then transferred to the ISR.