Forum Discussion

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

PIO Direction

hi all, I am using bidirectional pio for my design.Can some one tell me how to set the directions. I am using IOWR_ALTERA_AVALON_PIO_DIRECTION(PIO_DATA_BASE, 0); for using pio as output...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
14 years ago

Actually they are inverted: 0 is for input and 1 for output.

Moreover this is correct only for single I/O pio: if your pio is wider, you need to set all the required bits.

Last thing you need to check is if you enabled the bidirecitonal feature in sopc/Qsys pio properties