2. Procedural assignments procedural assignmentsandcontinuous assignments: Continuous :drive nets and are evaluated and updated whenever an input operand changes value. Procedural :Blocking and Nonblocking procedural assignment statements. 阻塞赋值:evaluates, schedules同一时刻一步执行。 非阻塞赋值:evaluates, sc...
代码: reg[data_width-1:0] in31_reg [0:depth-1];//genvar k1; // Error:procedural assignment to a non-register k1 is not permitted, left-hand side should be reg/integer/time/genvarintegerk1;generatealways@(posedgeclkornegedgerst_n)beginif(!rst_n)beginfor(k1=0;k1<depth;k1=k1+1)beg...
过程性赋值(Procedural assignment) 过程性赋值发生在过程(procedures)中,如always、initial、task和函数中,用于将值放到变量上。变量将保持该值,直到下一次对同一变量的赋值。 当仿真在仿真时间内的某一时刻执行该语句时,该值将被放到变量上。这可以通过使用控制流语句,如if-else-if、case语句和循环机制来控制和修改...
non-blocking assignment :The non blocking procedural assignment allows assignment scheduling without blocking the procedural flow. The non blocking procedural assignment statement can be used whenever several variable assignments within the same time step can be made without regard to order or dependence u...
This allows us to place a continuous assignment on the same statement that declares the net. Note that because a net can be declared only once, only one declaration assignment is possible for a net. wirepenable=1; Procedural Continuous Assignment ...
// Mux examples - Three ways to do the same thing.// The first example uses continuous assignmentwireout;assignout=sel?a:b;// the second example uses a procedure// to accomplish the same thing.regout;always@(aorborsel)begincase(sel)1'b0:out=b;1'b1:out=a;endcaseend// Finally - yo...
过程性赋值(Procedural assignment) 过程性赋值发生在过程(procedures)中,如always、initial、task和函数中,用于将值放到变量上。变量将保持该值,直到下一次对同一变量的赋值。 当仿真在仿真时间内的某一时刻执行该语句时,该值将被放到变量上。这可以通过使用控制流语句,如if-else-if、case语句和循环机制来控制和修改...
wire a, b, c; // This continuous assignment wire my_mux = (a ? b : c); // is equivalent to this procedural assignment reg my_mux; always @(a or b or c) begin case(a) 1'b1: my_mux = b; 1'b0: my_mux = c; endcase end // and this one too reg my_mux; always @(...
You can assign to a register (reg data type) the value of a net (wire), constant, another register, or a specific value. Example - Bad procedural assignment 1 module initial_bad(); 2 reg clk,reset; 3 wire enable,data; 4 5 initial begin 6 clk = 0; 7 reset = 0; 8 enable =...
verilog规定assign中的赋值目标必须是wire型的，而always语句中的赋值目标必须是reg型的。always语句块中...