Identifier'enable'hasnotbeendeclaredyet.Ifthiserrorisnotexpected,pleasecheckifyouhaveset`default_nettypetonone 一目了然,下一个 `define 和 `undef `define用于定义一个宏定义,`undef用于取消一个宏定义。 宏定义可以定义在模块内,也可以定义在模块外,效果都一样,而parameter只能定义在模块内。 可以定义设计参数...
'define myzero 0 assign mysig = 'myzero;//注意要加宏符号 //示例2,条件编译 'ifdef MYVAR module if_MYVAR_is_declared; ... endmodule 'else module if_MYVAR_is_not_declared; ... endmodule 'endif 12 Include文件(不太理解) Verilog可以将源代码分散在多个文件中,当需要引用另一个文件中的代码时...
'define myzero 0 assign mysig = 'myzero; //示例2,条件编译 'ifdef MYVAR module if_MYVAR_is_declared; ... endmodule 'else module if_MYVAR_is_not_declared; ... endmodule 'endif 12.Include文件 Verilog可以将源代码分散在多个文件中,当需要引用另一个文件中的代码时,可以使用如下语句:“`include ...
wire sum; // declaration is not required assign sum = a + b; `default_nettype none wire sum; // must be declared assign sum = a + b;
可以使用类似宏定义的方式,例如 `define 原模块名 新模块名。 预编译:在Verilog代码编译之前,使用预编译器对代码进行处理。预编译器会根据定义的重命名规则,将所有使用原模块名的地方替换成新的模块名。 编译:经过预编译处理后的代码会被编译器编译成可执行的二进制代码。 使用预编译器重命名Verilog模块的优势包括:...
'define myzero 0 assign mysig = 'myzero;//注意要加宏符号 //示例2,条件编译 'ifdef MYVAR module if_MYVAR_is_declared; ... endmodule 'else module if_MYVAR_is_not_declared; ... endmodule 'endif 1. 2. 3. 4. 5. 6. 7. 8. ...
`define T wreal4state //nettype to resolve net value module atb_tiomux_tgate ( TG_out, VSS, ATB_TG_EN, ATB_TG_EN_B, TG_in ); inout `T TG_in; input logic ATB_TG_EN; inout `T TG_out; input logic ATB_TG_EN_B; ...
output aport; // Error - already declared 1. 2. 3. 有符号端口声明 可以使用signed属性来声明有符号端口,默认情况下是无符号的端口。 module ( input signed a, b, // a, b are signed from port declaration output reg signed c // c is signed from reg declaration ...
There is a separate program, ivlpp, that does the preprocessing. This program implements the `include and `define directives producing output that is equivalent but without the directives. The output is a single file with line number directives, so that the actual compiler only sees a single ...
Size or unsized number can be defined in <Size> and <radix> defines whether it is binary, octal, hexadecimal or decimal.IdentifiersIdentifier is the name used to define the object, such as a function, module or register. Identifiers should begin with an alphabetical characters or underscore ...