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Read from FLASH memory on DE1 board

Altera_Forum
Honored Contributor II
‎07-01-2009 12:37 PM
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Hi 

 

We would be very greatful if someone can show us how to access the flash memory on a DE1 board. We have tried to find something about it here on the forum but haven't found anything. 

 

The thing we want to do is to read from a specific address on flash memory, and send this information, containing a byte, to the LED:s to light up. Is this possible to do only in VHDL code, or do we have to go through the Nios 2? How is it done in that case?  

 

Our Flash memory is a S29AL032D, 4-Mbyte NOR, 8-bit data bus. 

The FPGA is a cyclone II EP2C20F484C7 

 

Have been struggeling with this for two weeks now so if anybody can help we are very greatful.  

 

Thanks
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Altera_Forum
Honored Contributor II
‎07-01-2009 03:57 PM
457 Views

Nothing prevents accessing the flash memory chip from an own hardware described in VHDL. Just be careful with the bidirectional data bus which must be handled with tristate buffers and respect the datasheet time diagrams for the reading operations.

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