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Altera_Forum's avatar
Altera_Forum
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20 years ago

C++ help in NIOS

Hello, I am a newbie with NIOS. I was able to successfully run the "hello world" program on my board... I was just wondering if there is some type of documentation on the internet that will tea...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
20 years ago

In your Nios documentation, there is a chapter for each of the various peripheral devices. The one you're looking for is the PIO device. You need to add a PIO device to your SOPC project, then look in the system.h file in your system library to find the definition of the PIO's base address. Then, in your main, you'll have some code like this:

# include "system.h"# include "altera_avalon_pio_regs.h"

...

IOWR_ALTERA_AVALON_PIO_DATA(PIO_0_BASE, 0); // Base address and value.