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Altera_Forum
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13 years ago

Avalon bus addressing wrong

Any idea why in my C code I poll address 0x8000 but actually see 0x0c00 (divide by 2) on Avalon address signals utilizing SignalTap? I would expect to see 0x2000 (divide by 4).
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
13 years ago

What is the CPU reading at that address? Is it a memory chip or a component? Do you look at the signals on the CPU's master Avalon interface or on the slave's?

How did you implement your test software?

Does your CPU have any data cache?