When the number of the nesting grows, it becomes difficult to understand the if else statement. The verilog case statement, comes handy in such cases. We will first look at the usage of the case statement and then learn about its syntax and variations. ...
A Verilogcasestatement starts with thecasekeyword and ends with theendcasekeyword. The expression within parantheses will be evaluated exactly once and is compared with the list of alternatives in the order they are written and the statements for which the alternative matches the given expression ar...
又,根据ARM的“Verilog X Bugs”(http://www.arm.com/files/pdf/Verilog_X_Bugs.pdf) 第7页: CODE: Important things to note about case statements are listed below (which may help to dispel a few myths): · a Verilog case statement is priority encoded (just like a nested if expression) ·...
EDA Playground lets you type in and run HDL code (using a selection of free and commercial simulators and synthesizers). It's great for learning HDLs, it's great for testing out unfamiliar things and it's great for sharing code. Let's get started You can start typing straight away. ...
The if statement is aconditional statementwhich uses boolean conditions to determine which blocks of verilog code to execute. Whenever a condition evaluates as true, the code branch associated with that condition is executed. This statement is similar to if statements used in other programming languag...
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...
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...
Verilog定义了case,casez和casex语句,用于做多种情况下的选择语句。 reg [1:0] sel; reg [2:0] result; always @(*) case(sel) 2’b00: result = 3’d0; 2’b01: result = 3’d1; 2’b10: result = 3’d2; endcase 使用case语句代替嵌套的if-else将会产生更易读的代码,更好的逻辑利用率和更...
// Code your testbench here 2 // or browse Examples 3 4 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"); ...
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\...