wyscan.tdf

maxplus下连接硬件实现74181运算器

subdesign wyscan
(scan_clk,g[3..0],s[3..0]:input;
 q[1..0],out[3..0],gw,sw:output;)
variable tt:machine with states(t0,t1);
begin
tt.clk=scan_clk;
case tt is
when t0=>q[]=b"01";
         out3=g3;out2=g2;out1=g1;out0=g0;gw=q1;sw=q0;
         tt=t1;
when t1=>q[]=b"10";
         out3=s3;out2=s2;out1=s1;out0=s0;gw=q1;sw=q0;
         tt=t0;
end case;
end;