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RGoem's avatar
RGoem
Icon for New Contributor rankNew Contributor
6 years ago

Undefined pin state prior to loading rbf

Hello everyone, I'm using a de0-nano-soc development board which has a Cyclone V including a HPS. I'm running U-Boot to load an rbf file at boot and then linux is ran. However when powering on the b...
FawazJ_Altera's avatar
FawazJ_Altera
Icon for Frequent Contributor rankFrequent Contributor
6 years ago

Hello,

it seems there is a limitation here.

The uboot will freeze all the pins, configure the FPGA, then unfreeze and apply the pins settings. Before that, there is no function that can be done on FPGA.

Arria 10 SoC might support your need, since you can let uboot configure the pins before configuring the FPGA.

Thanks