Forum Discussion

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

IORD_ALTERA_AVALON_PIO_DATA to slow?

Hi, I'm trying to capture samples from an A/D Converter and streaming them onto a PC via an ethernet connection. I've extended the triple speed ethernet design example from the Nios II v9.1 instal...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

I have a simple question. While reading data from PIO, we just need to mention the base address of the signal. Whereas, the PIOs can be of different widths (1bit to 32 bit)... so by just mentioning the base address, the system automatically reads the complete value???

BIU_status_x = IORD_ALTERA_AVALON_PIO_DATA(BIU_STATUS_REG_BASE);

In this case, the BIU_STATUS_REG is a 5 bit PIO. Will I get the same 5 bit value in BIU_status_x????