Module:
module mod_a ( input in1, input in2, output out );
// Module body
endmodule
Connecting Signals to Module Ports
There are two commonly-used methods to connect a wire to a port: by position or by name.
By position
mod_a instance1 ( wa, wb, wc );
By name
mod_a instance2 ( .out(wc), .in1(wa), .in2(wb) );
module top_module ( input a, input b, output out );
mod_a mod_a1(.out(out),.in1(a),.in2(b));
//mod_a mod_a1(a,b,out);
endmodule
Module pos:
module mod_a ( output, output, input, input, input, input );

module top_module (
input a,
input b,
input c,
input d,
output out1,
output out2
);
mod_a mod_a1(out1,out2,a,b,c,d);
endmodule

Module name:

You are given the following module:(顺序不重要)

module top_module (
input a,
input b,
input c,
input d,
output out1,
output out2
);
mod_a mod_a1(.in1(a),.in2(b),.in3(c),.in4(d),.out1(out1),.out2(out2));

这篇博客介绍了Verilog中连接信号到模块端口的两种方式——按位置和按名称,并详细阐述了如何设计和实例化模块,包括shift、shift8、add、fadd和cseladd(并行加法器)。同时,讲解了如何构建能进行加减运算的adder-subtractor模块,使用16位加法器和XOR门来实现这一功能。


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