总结:保证if-else对应齐全;case必写default。 2.2.4 if-else语句和case语句的区别 对于这个的讨论,本人认为是以前由于综合工具落后,导致有区别,但是随着综合工具的更新,他们之间的区别越来越小,甚至有人可以用if-else综合出无优先级的多路选择器,用case综合出有优先级的多路选择器。 “if-else的逻辑判别是有优先级...
答案解析 查看更多优质解析 解答一 举报 加一个使能信号吧,可能是由于out没有赋初值;还有判断的方法最好是使用4‘b0;如:d!=4’b0;把else补全,最后一个else 解析看不懂?免费查看同类题视频解析查看解答 相似问题 Error (10170):Verilog HDL syntax error at Verilog1.v(2) near text "74138"; expecting an...
Syntax If multiple statements need to be placed inside theiforelsepart, it needs to be enclosed withinbeginandend. if([expression])Single statement// Use "begin" and "end" blocks for more than 1 statementsif([expression])beginMultiple statementsend// Use else to execute statements for which...
首先说明一点，你的问题和你代码出错不是同一个问题。if else作为选择可以出现在过程赋值中，例如always initial 你这里的出错应该是敏感列表不全，可以采用2001语法always @ (*) 代替 另外组合逻辑中不要采用非阻塞赋值<= BR,Timothy
答案解析 查看更多优质解析 解答一 举报 加一个使能信号吧,可能是由于out没有赋初值;还有判断的方法最好是使用4‘b0;如:d!=4’b0;把else补全,最后一个else 解析看不懂?免费查看同类题视频解析查看解答 相似问题 Error (10170):Verilog HDL syntax error at Verilog1.v(2) near text "74138"; expecting an...
else if,elseif,else Execute statements if condition is true collapse all in page Syntax ifexpressionstatementselseifexpressionstatementselsestatementsend Description ifexpression,statements, endevaluates anexpression, and executes a group of statements when the expression is true. An expression is true ...
else if,elseif,else Execute statements if condition is true collapse all in page Syntax ifexpressionstatementselseifexpressionstatementselsestatementsend Description ifexpression,statements, endevaluates anexpression, and executes a group of statements when the expression is true. An expression is true ...
always内部出现多个if时，需要begin end来包住。另外，模块结尾需要endmodule
else if,elseif,else Execute statements if condition is true collapse all in page Syntax ifexpressionstatementselseifexpressionstatementselsestatementsend Description ifexpression,statements, endevaluates anexpression, and executes a group of statements when the expression is true. An expression is true ...
The verilog code snippet below shows the basic syntax for the if statement. if(<expression1>)begin// Code to executeendelseif(<expression2>)begin// Code to executeendelsebegin// Code to executeend We can exclude the else and else if branches from the statement if we don’t need them....