Forum Discussion

Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Nios 2 to custom component communication

Hi, I'd like to know what instructions of Nios C program Do I need for writing and reading data to/from a custom component of sopc system??? I saw in some AN people use IORD() /IOWR() macros or...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

It depends what kind of interface the custom component has.

IORD/IOWR are the most common and they are used for memory mapped Avalon slaves.

On the other hand printf involves the use of a driver that redirects stdout to the specific component interface; so, at a low level, printf itself is possibly made of IOWRs .