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Asifa's avatar
Asifa
Icon for New Contributor rankNew Contributor
1 year ago

when I increased or decreased PIO component width from the existing qsys file, its not working.

I need to control 7 gpio pins for output and 8 gpio pins for bidirectional. when I tried to change the pre-existing qsys file from my_first_hps-fpga, it did not work. I only tried to change the PIO ...
Fpga Devkit
AqidAyman_Altera's avatar
AqidAyman_Altera
Icon for Regular Contributor rankRegular Contributor
1 year ago

Hi,


I really apologies for the delay response. I am contacting the expert for the HPS-related issue. This is my findings:


We recommend you should confirm that PIO works on U-Boot.

U-Boot has useful commands such as’ md’ and ‘mw’ for debugging.


For example, PIO assigned to 0xFF200100 on LW-H2F bridge.

The following command shows a value of PIO. Value for md and mw command is always hexadecimal so that a prefixes such as 0x is not necessary.


Example

# md FF200100

00000000

# mw FF200100 12345678

Lastly, before accessing the bridges, please enable the bridges using “bridge enable” command.


Thank you for your understanding.