Re: [Discuss-gnuradio] FPGA source proposal

[Matt Ettus]

Clark,

Thanks for your suggestion.  I have implemented your changes.  Check out
the latest CVS.

Thanks,
Matt

Clark Pope wrote:
> I've been working with the usrp_std fpga design. By including/removing
> various circuits the device utilization ranges from 6% (no TX or RX) to
> 87% (full design). I propose that we add conditional compile macros to
> make it easier for custom fpga designs to select the circuits to be
> compiled. For example, some applications may be receive only or transmit
> only, others may not want to use the resources for the half band filter
> and so on.
> 
> Any way, attached is my usrp_std.v and rx_chain_hb.v. For example, I
> added this to usrp_std.v:
> 
> // Uncomment the following to include optional circuitry
> //`define DEBUG_OWNS_IO_PINS
> `define TX_ON
> `define RX_ON
> `define Dual_RX
> //Note: More conditional compile flags in rx_chain_hb.v
> 
> And then the entire receiver or transmitter can be compiled out to make
> room for custom circuits.
> 
> This makes the source a little harder to read but it:
> 
> 1. reduces the number of files being maintained, e.g. don't need
> rx_chain.v AND rx_chain_hb.v
> 2. makes it more likely that custom extensions remain backward compatible
> 
> Thanks,
> Clark
> 
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