Random number generation and indexing into RAM/ROM block

Ahmed,

The number generator outputs a random number that is then used to determine the address into the ROM/RAM. So in my example, if the random number 5 is output by the PRNG, this value is read in by the RAM/ROM block, a for-loop is run to determine which index corresponds to this number, and the output of the ROM/RAM block is the index. I made a slight mistake in the diagram-the amplitude out is NOT an input to the PRNG, it is used by a different block of code. The for-loop logic currently resides in the ROM/RAM block. It is not a wrapper at the moment. The loop requires that I declare the entire array as a constant. I cannot loop through an array that I read in via a .mif file. So this is why the synthesizer does not instantiate a ROM/RAM block. I call it a ROM block in the diagram, but due to this logic it is not implemented as such. This is where I'm having trouble with the logic.

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Hi ,

"It's not a true ROM/RAM in the sense that the "address" being input to the ROM/RAM block is not the index, but is used to determine the index."

So according to your diagram , what is 'Pseudo-Random Number Generator' generating a random address for a random location on ROM/RAM ?

"For now I have for-loop which basically runs through the entire array, compares the random number to the values in the array, and outputs the index. However"

Entire array i.e the ROM/RAM ? is this logic a wrapper with ROM/RAM as a component inside it ?

Ahmed Asim Ghouri

Embedded Strings inc

Website : www.emstrings.com

Email : support@emstrings.com

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