On-Chip MEM contents (in user peripheral) access??

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originally posted by svhb@Jan 4 2006, 09:46 AM

is this a verilog design, maybe if you post it (or parts from it, i can understand better the situation.

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Thanks a lot for Nios Expert svhb&#39;s help.

More detail about my problem will be:

I instantiated On-Chip MEM (LPM_MEM, two port, Block Type: AUTO) in a hardware design. Then I have to use CPU to access the data which is sitting on the LPM_MEM. Planning to use DMA to move data from custom logic to SDRAM or UART.

Currently I stuck at designing register file to let the LPM_MEM in the custom peripheral visible to Avalon bus. For general register accessing in custom peripheral I can simply use handcode. But my LPM_MEM is tens of thousand bytes large. So I guess there should be a smart way to solve.

I did think about using a single register to map the memory ouput port then use extra logic to play memory data byte by byte to the bus. (Definitely a stupid design.)

If the LPM address can be mapped to avalon bus just like SOPC builder assgined address. Accessing the whole LPM_MEM will be much more convenient.

Thanks a lot, I&#39;m still expecting help!