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Altera_Forum's avatar
Altera_Forum
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10 years ago

Why is my software not producing the correct Avalon write?

I have my nios connected to an Avalon memory mapped bridge that will allow me to communicate with an external RTL component. All I am trying to do is read and write to a register in the RTL component...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

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Hi,

Are you sure the address is correct ? The bridge changes the address, you need to add the bridge's address with the Avalon-MM slave component, to get the final address.

Did you use signal tap to see if the bus transaction is correct ?

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I am currently running signal tap now and I am not seeing the write transaction I requested.

What exactly do you mean that the bridge changes the address? I am looking at the address map in qsys and I see that the bridge is located at 0x0002_0000.