'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 ...
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 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 12 Include文件(不太理解) ...
Verilog-2001标准定义了一个`default_nettype编译器指令。 如果该指令被分配为“无”,则必须声明所有的1bit 信号网络。 // no `default_nettype wire sum; // declaration is not required assign sum = a + b; `default_nettype none wire sum; // must be declared assign sum = a + b;...
`ifndefCONSTANTS// guard prevents header file from being included more than once, it is similar to the header file of C`defineCONSTANTS`defineADDR_BITS 16`defineNUM_WORDS 32`defineLOG2(x) (x <= 2) ? 1 : \// calculate the log2(x)(x <=4) ?2: \ ...
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。 AI检测代码解析 module ( input signed a, b, // a, b are signed from port declaration output reg signed c // c is signed from reg declaration ...
下面给出两个使用宏的例子: '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 1 2 3 4 5 6 7 8 9 10 11 12 13 14...
+define+name=value Define the preprocessor symbol "name" to have the string value "value". If the value (and the "=") are omitted, then it is assumed to be the string "1". This is similar to the "-D" on the iverilog command line. ...
Each element in the memory may represent a word and is referenced using a single array index. Register Vector Verilog vectors are declared using a size range on the left side of the variable name and these get realized into flops that match the size of the variable. In the code shown ...