Re: gEDA-user: Iverilog synthesis problems

2008-03-29 Thread Darren Stevens
Hello Stephen On 25/03/08, Stephen Williams wrote: The -tfpga code generator for virtex is almost certainly trying to implement your gates with LUT2 devices. It uses an INIT= attribute attached to the LUT2 to specify the logic. That's pretty basic and should work. Looks like ngdbuild is

Re: gEDA-user: Iverilog synthesis problems

2008-03-26 Thread Darren Stevens
Hello Stephen On 25/03/08, Stephen Williams wrote: Since the Xilinx free tools for this chip don't include a synthesis tool I've been trying to use Iverilog, with some success. I'm surprised by that. I thought the webpack releases support spartan chips of various sort via xst. However,

Re: gEDA-user: Iverilog synthesis problems

2008-03-25 Thread Stephen Williams
Darren Stevens wrote: Hello All, I've been trying to use a Digilent XLA development board fitted with a Xilinx spartan XCS10 fitted. Since the Xilinx free tools for this chip don't include a synthesis tool I've been trying to use Iverilog, with some success. I'm surprised by that. I