// Use "begin" and "end" blocks for more than 1 statements if ([expression]) begin Multiple statements end // if statment with an else part if (expression) [statement] else [statement] // if else for multiple statements should be // enclosed within "begin" and "end" if (expression)...
1.书写习惯有问题。最好在端口里面就声明好input output信号，见下图；2.逻辑错乱，在一个always块，或...
if([expression])Singlestatement// using "begin" and "end" blocks for more than 1 statementsif([expression])beginMultiplestatementend// using else to execute statements for which expression is falseif([expression])beginMultiplestatementsendelsebeginMultiplestatementsend// if-else-if style to check f...
3 always @event begin 4 [multiple statements]5 end 不带有敏感信号的 always 语句块会一直 执行 ➢ 可用于仿真时钟信号生成 1 always #10 clk= ~clk;always设计组合电路 代码示例：1 module combo (input a, b, c, d, e,2 output reg z);3 always @ ( a or b or c or d...
4 [multiple statements] 5 end 不带有敏感信号的 always 语句块会一直执行➢ 可用于仿真时钟信号生成 1 always #10 clk= ~clk; always设计组合电路代码示例: 1 module combo (input a, b, c, d, e, 2 output reg z); 3 always @ ( a or b or c or d or e) begin 4 z= ((a & b) ...
elseif(expression)[statement] else [statement] case语句 //Here 'expression'should match one of the items case(<exoression>)case_item1:<single statement>case_item2,case_item3:<single statement>case_item4:begin <multiple statements>enddefault:<statement>endcase ...
[multiple statements] end 1. 2. 3. 例如我们描述一个同步复位的D触发器,可以这样描述: always@(posedge i_clk) begin if(i_rst) begin q <= 0; end else begin q <= d; end end 1. 2. 3. 4. 5. 6. 7. 8. 这表示当检测到时钟上升沿时,判断是否复位有效,如果有效对输出复位,否则采样输入...
1always @(event)2[statement]3always @event begin4[multiple statements]5end 不带有敏感信号的 always 语句块会一直执行➢ 可用于仿真时钟信号生成 1always #10clk=~clk; always设计组合电路代码示例: 1 module combo (input a, b, c, d, e, ...
if-else for multiple statements moduletb;inta=9;initialbeginif(a==10)begin$display("a is found to be 10");// Is executed when "if" expression is True// Can have more additional statements hereendelsebegin$display("a is NOT 10 :(");// Is executed when "if" expression is false$dis...
always @ (edge eventa or edge eventb) begin[multiple statements]end 其中edge可以是negedge(下降沿)和posedge(上升沿)。 组合逻辑通常用来监听信号水平事件的发生。当敏感信号出现电平的变化时就会执行always语句。例如always @(a or b or c),a、b、c均为变量,当其中一个发生变化时都会执行后续代码。例如:...