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Altera_Forum's avatar
Altera_Forum
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11 years ago

NIOS II CustomComponent Programming Problem

Hi all, I have created a LED register in vhdl and created qsys component out of that. Connected it to the nios processor as shown in below images. Created NIOS project and when I am trying to r...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
11 years ago

I guess this happens because Nios uses byte addressing, while C code unsigned int* forces 32bit addressing. Try to cast with unsigned char* .

Anyway the best way to access qsys component registers is through IOWR/IORD macros, which automatically take care of matching the device bus size.