Dual_port_BRAM

S

steve

Hi,

I have a dual port BRAM, accessible from the PPC of a virtex.

I was looking for some VHDL to take the contents of an address from the
other port (port B) , decrement the content , then stick it back into the
same address , word, byte ,long word, it does not matter., via port B.

I know it sounds like a stupid waste of time, but specifically I need
something to test the PPC and data paths , because something is corrupting
someplace, (data or timing), i need to track it down)


I've had a look around , but good examples seem to be in short supply.
Can anyone offer some pointers to examples.

The other question that is confusing me about Xilinx, If I try and take a
dual port memory and set port A to an XPS_BRAM_controller at one address,
then set port B to another XPS_BRAM_controller at a second address (to
build a loop back test at two different addresses) Xilinx tools will not
allow it?


Steve
 

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