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Altera_Forum
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14 years ago

AVALON-MM Master Template on DE2

I'm attempting to use the Avalon-MM Master Templates located at: (altera.com/support/examples/nios2/exm-avalon-mm.html) in order to control some external SDRAM on the Terasic DE2 Development board an...
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Altera_Forum
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14 years ago

Since you are attempting to transfer only 2 bytes have you setup the read master to be 8 or 16 bits wide? I seem to recall it only being able to handle transfer lengths that are a multiple of it's data width. So if you set the read master to be 32-bit I could see it treating 2 bytes as 0 bytes and completing without issuing any reads.

The location being read from also needs to be aligned in memory as well. So if you use say a 16-bit master then your memory location needs to be on a 2 byte boundary.