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Altera_Forum's avatar
Altera_Forum
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12 years ago

How to let FPGA get access to HPS pins

I've got an Arrow SOCkit and it has a USB-UART connected to the HPS' pins, but I'd like to access the UART from the FPGA logic. Is this possible? If so how is it done? Thank you!
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

The loan_io_in, loan_io_out and loan_io_oe conduits are all 66 bits wide to allow for all possible loan I/O signals. I'm only using some of the loan I/O signals though, and I'm setting the bits in loan_io_oe to set the loan I/O signals I use to be inputs or outputs as required, and providing a method of driving my loan I/O outputs and reading my loan I/O inputs. I'm confused about what I should do with the bits in loan_io_in, loan_io_out and loan_io_oe that correspond to the loan I/O signals I'm not using though, as these signals are mapped to peripherals instead of loan I/O - what should I set these bits to?