Let write this example using verilog case statement // www.referencedesigner.com // Verilog Tutorial // Example of multiplexer module mux_case(out,cntrl,in1,in2); input cntrl,in1,in2; output out; reg out; always @ * case (cntrl) 1'b0: out = in1; 1'b1 : out = in2; end...
To better demonstrate the way we use the case statement in verilog, let’s consider a basic example. For this example we will look at a simple four to one multiplexor circuit. We frequently use the case statement to model large multiplexors in verilog as it produces more readable code than...
如何在Verilog的case语句中使用generate块? 在case语句系统Verilog中,生成块(generate block)是一种用于在编译时生成硬件电路结构的特殊语法结构。它允许根据条件或参数的值,在编译时动态地生成不同的硬件电路。 生成块可以包含任意的Verilog代码,包括模块实例化、信号声明、赋值语句等。它通常用于实现复杂的电路结构,如多...
I am trying to generate a state machine where no' of states depends on the parameter, so how can I write a verilog code for this variable no' of states. I tried writing using generate statement here 'rep' is a parameter generate for(j=0;j<rep-1;j\+\+) begin:statemachine j\...
In a case statement, the comparison only succeeds when each bit of the expression matches one of the alternatives including 0, 1, x and z. In the example shown above, if any of the bits inselis either x or z, thedefaultstatement will be executed because none of the other alternatives ...
I'm a beginner for verilog design. I have a question. Is there any way that could express a case statement in for loop including default part? I tried the code below. /// (reg [2:0] ctrl) for(i=0 ; i<5; i=i\+1) begin case(ctrl) i : begin out <= i; end endcase end...
onehot state machines. Verilog defines three versions of the case statement:case,casez,casex. Not only is it easy to confuse them, but there are subtleties between them that can trip up even experienced coders. In this article I will highlight the identifying features of each of the twins,...
modulecase_example; 5 reg[2:0]data; 6 7 always@(data)begin 8 case(data) 9 3'h2:$display("value of data is 2"); 10 3'h4:$display("value of data is 4"); 11 3'h5:$display("value of data is 5"); 12 default:$display("default statement is executed for data = %0d",data...
// State into a case statement, into a process. CM_WR_DATA: begin cf_we_n = 1'b0; i_wr = i_wr + 1; n_pin_control = CM_WR_WAIT; end It seems pretty short and easy, but I got an issue : my state CM_WR_DATA is done two times instead of one time, so...
Verilog之case语句 verilog设计进阶 时间:2014年5月6日星期二 主要收获: 1.学会使用case语句: 2.学会使用随机函数$random. $random: 1.函数说明:$random函数调用时返回一个32位的随机数,它是一个带符号的整形数. 2.产生0~59之间的随机数的样例: reg[23:0]rand; rand={$random}% 60; 3.产生一个在min...