initializing M-RAM

Question

Q's MegaWiz does not let me setup a MIF or a HEX for a M-RAM.

I would like to let this device come up with a predifined pattern in the RAMs. (never changes).

Ist there a way to do this though? - over the way of the system content editor ?

... via JTAG ?

I need a way for operational mode not only during development process ...

The only idea I currently have, is to use aother small RAM, load it with a ZIP file and unpack the data while setup phase. (a strange idea, of course :D )

altera_forum · Answer

--- Quote Start ---  Q's MegaWiz does not let me setup a MIF or a HEX for a M-RAM.  --- Quote End ---     The M-RAM itself does not support memory initialization during configuration.  This is documented in the device handbook.

altera_forum · Answer

I get the same problem. Can you try this way:  use an extern eeprom, say 24c32, depending on your size. store your data in the eeprom. implemente a I2C interface and related read logic in your fpga.  whenever your fpga reset, it can read data from eeprom and init your ram.   You may need a init_done signal to let other logic know when to start their operation.

altera_forum · Answer

This would require a new (modified) hardware which I cannot create. Anyway there is the opportunity to do this configuration from an external PC over PCI. :cool:    It would have been just fine to have it ready configured in the data stream.:rolleyes:

altera_forum · Answer

Use M4K blocks to initialize data. You can go up to 256 KB  in a stratix 2 (180) fpga.

altera_forum · Answer

I cannot, since the Fitter ran out of M4Ks.

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initializing M-RAM

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