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Altera_Forum
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19 years ago

Reduce Interrupt latency?

Hi I am working on NIOS fast cpu at 100Mhz and my problmae is that i am laging in timing issues at the time of Interrupt come from the device. I am developing HAL for USB device and when device...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
19 years ago

I've uploaded a custom instruction I developed to reduce interrupt latency.

It is located in the "Post your own IP" section of this forum.

The custom instruction replaces a bunch of assembly instructions in the HAL/MicroC/OS-II exception handler that calls your ISR.

How about you give this a try and see if it meets your needs?

You can always use it in conjunction with your own custom instruction to save/restore registers if you need to.