[英]Use of wire inside an always block?
Can I use a wire inside an always block? 我可以在Always Block内使用电线吗? Like for example:
例如:
wire [3:0]a;
assign a=3;
always @(c)
begin
d=a+c;
end
It got compiled without throwing any error. 它被编译而不会引发任何错误。 Why?
为什么?
Yes, you can use a wire's value inside an always block, you just can not assign a value to a wire in always or initial block. 是的,您可以在Always块中使用导线的值,而不能在Always块或初始块中为导线分配值。
The only real difference between a wire and reg is the syntax for assigning values. 导线和reg之间的唯一真正区别是分配值的语法。
In the above example d could also have been created as a wire, these are equivalent: 在上面的示例中,d也可以创建为导线,它们是等效的:
reg [3:0] answer_reg;
always @* begin
answer_reg = a + c;
end
wire [3:0] answer_wire;
assign answer_wire = a + c;
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