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; alw
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 m...
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...
Case Statement Example 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 m...
在Verilog中,Case语法是一种常用的控制结构,用于根据不同的输入值执行不同的操作。 Case语法的基本结构如下: case (expression) value1: statement1; value2: statement2; ... default: statementN; endcase 其中,expression是一个表达式,可以是任何Verilog数据类型。value1、value2等是表达式的值,statement1、...
For example, this would implement the 4-input priority encoder from the previous exercise: 例如,这将实现前面练习中的4输入优先级编码器: A case statement behaves as though each item is checked sequentially (in reality, a big combinational logic function). Notice how there are certain inputs (e...
endcase ```其中，expression表示待选择的值，pattern1、pattern2等表示不同的模式，statement1、statement2等表示与相应模式匹配时执行的代码块，default表示默认情况下执行的代码块。casex语句会根据expression的值逐个匹配各个模式，一旦找到与expression值匹配的模式，即执行相应的代码块。如果所有模式都不匹配，则执行...
The Verilogcasestatement is a convenient structure to code various logic like decoders, encoders, 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 expe...
But in this way, I couldn't insert the default part of case statement in the loop. What I wanna express is like below case(ctrl) 0 : out <= 0; 1 : out <= 1; 2 : out <= 2; 3 : out <= 3; 4 : out <= 4; default : out <= out; endcase I wanna express this ...
2、case语句的内容中,begin-end只有在有多条语句时才是必须的; 3、每一个条件分支的名称是可选的,这点不像循环生成语句那么严格。 关于generate-case语句,举例如下: wire c, d0, d1, d2; parameter sel = 1; generate case (sel) 0 : assign c = d0; ...