Then we have another common type of code, where one reg variable is driven from more than one always block. Well it will surely cause synthesis error.Example - Initial Statement 1 module synthesis_initial( 2 clk,q,d); 3 input clk,d; 4 output q; 5 reg q; 6 7 initial begin 8 q ...
在verilog中不可使用++,--的操作符,只可使用i = i + 1。 Repeat 不同于for循环制定一个变量,使其自动递增想要的结果,repeat是显示指定一个循环数,以达到想要的结果。 1repeat(16)begin2$display ("Current value of i is %d", i);3i = i +1;4end 6. 变量赋值(Variable Assignment) 组合逻辑元素只...
One simple way to eliminate the latch with always statement is to always drive 0 to the LHS variable in the beginning of always code as shown in the code below. 3 is to 8 decoder using always 1moduledecoder_always (in,out);2input[2:0] in;3output[7:0] out;4reg[7:0] out;56alwa...
位宽,则默认为标量(1位)。举例如下: wire a; //a为标量 reg clk; //clk为标量reg型变量 n 线宽大于1位的变量(包括net型和variable型)称为向 量(vector)。向量的宽度用下面的形式定义: [msb : lsb] n 比如: wire[3:0] bus; //4位的总线 n 2.位选择和域选择 在表达式中可任意选中向量中的一位...
Variable Declarations Example Initial Values Assigning an Initial Value to a Register Initial Values Example One Initial Values Example Two Arrays of Reg and Wire Arrays Example One Arrays Example Two Multi-Dimensional Arrays Multi-Dimensional Array Example One Multi-Dimensional Array Examp...
Add support of event variable under Generate Add support of force/release under Generate Fix bug force/release under @* Fix start up problem when veritakwin.exe is in the same folder as source file.. GUI Change Color if single bit has "X/Z" in vector signals 2.11...
| variable_identifier ;array_member_label : "default" | (type_identifier)=> type_identifier | constant_expression ;constant_multiple_concatenation : LCURLY constant_expression constant_concatenation RCURLY ;/*TODO module_path_concatenation : LCURLY module_path_expression (COMMA module_path_expressio...
Module declarations are templates for creating actual objects. Modules are instantiated inside other modules, and each instantiation is creating a single object from that template. The exception is the top-level module which is its own instantiation. The modules ports must to be matched to those wh...
Variable indexing on the right produces a multiplexer. Variable indexing on the left produces a demultiplexer. // n-bit wide 2-to-1 mux assign out1 = selb ? in2 : in1; // Mutiplexer assign outb = in1[sel]; // Demultiplexer assign out1[sel] = inb; // D latch assign q = en...
Variable Declarations Example Initial Values Assigning an Initial Value to a Register Initial Values Example One Initial Values Example Two Arrays of Reg and Wire Arrays Example One Arrays Example Two Multi-Dimensional Arrays Multi-Dimensional Array Example One Multi-Dimensional Array Examp...