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Altera_Forum's avatar
Altera_Forum
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21 years ago

Using HAL with DMA question

I am moving from NIOSI to NIOSII. I have an interrupt where if we are still DMA'ing, I just want to return from the interrupt. Before, I just had the following if statement to check the status ...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
21 years ago

http://www.altera.com/literature/hb/nios2/...pu_nii51006.pdf (http://www.altera.com/literature/hb/nios2/n2cpu_nii51006.pdf)

On page 8 there is the description of the status register. I haven't checked but there should either be a function call to get the status or some value to read back to use. If not then you can just do the old school method and read it back and mask the other bits you don't care about.

http://www.altera.com/literature/hb/nios2/...sw_nii52004.pdf (http://www.altera.com/literature/hb/nios2/n2sw_nii52004.pdf)

Page 4-18 might be helpful as well.

Happy reading (I know I'm lazy)

Cheers