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Altera_Forum's avatar
Altera_Forum
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13 years ago

Best way to configure registers with NIOS?

I'm looking to use NIOS to:

-take an incoming string from the UART which represents a number

-use this to number to program 10 different 16bit registers that will feed custom counter-like logic outside the NIOS.

I have the UART setup and C code written, but what is the best way to interface my NIOS and the custom logic?

Should I use the PIO to setup a Data Address bus to write to each of these registers?

Or is there a way to use a bridge to link internal NIOS registers to my custom logic?

1 Reply

  • Altera_Forum's avatar
    Altera_Forum
    Icon for Honored Contributor rankHonored Contributor
    13 years ago

    The simplest solution is to wrap your custom logic into an Avalon MM slave, so you can read/write the register with common IORD/IOWR calls.

    If you don't want to control the user component as a MM Slave, you can use any other interface, serial port or whatever. The PIO solution is an option, but IMHO a very inefficient one.