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我正在写一个4位多路复用器作为输入,1作为输出。我有托盘几种方法,使用的情况下,如果等,但我不断收到此错误:Verilog模块警告
WARNING:PhysDesignRules:367 - The signal <A<2>_IBUF> is incomplete. The signal
does not drive any load pins in the design.
WARNING:Par:288 - The signal A<2>_IBUF has no load. PAR will not attempt to route this signal.
WARNING:Par:283 - There are 1 loadless signals in this design. This design will cause Bitgen to issue DRC warnings.
当我在我的电路设计卡(BASYS)计划,一切工作正常,但开关是分配以A [2],不工作,这里是我的模块:
module Multi_4_1(
input [3:0] A,
input [1:0] S,
output Z
);
wire w1, w2;
Multi_2_1 a(.A(A[0]), .B(A[1]), .SEL(S[0]), .F(w1));
Multi_2_1 b(.A(A[2]), .B(A[3]), .SEL(S[1]), .F(w2));
Multi_2_1 c(.A(w1), .B(w2), .SEL(S[1]), .F(Z));
endmodule
module Multi_2_1(
input A,
input B,
input SEL,
output F
);
assign F = (~SEL&A)|(SEL&B);
endmodule
而这正是我给你的终端到卡上,但我和另一个项目试了一下,它工作正常
NET "A[3]" LOC ="B4"; # sw3
NET "A[2]" LOC ="K3";
NET "A[1]" LOC ="L3"; # sw1
NET "A[0]" LOC ="P11"; # sw0, el de la derecha
NET "S[0]" LOC ="G3"; # sw4
NET "S[1]" LOC ="F3"; # sw5
NET "Z" LOC ="M5"; # L0, el de la derecha
感谢男人们,我认为这是ISE(我正在使用的程序),但是您的右边=) – user2063154 2013-02-12 00:51:09
@ user2063154:快速模拟会很快显示出来...... – 2013-02-12 11:19:11