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...
I want to make ELU function in the verilog-A code, but it shows syntax error continuously. But the Verilog-A document says that this is the correct syntax, so I would like to ask you what should I fix. module myVerilogAmodel(d, g, s); //...
1、Vivado 15.4仿真时编译没有报错,但是仿真不成功,逻辑很简单,full为高电平时,rd_en要拉高,但全程没有拉高! 检查语法发现语句"else if( empty == 'b1);"多了一个分号“;‘,愚蠢了。 2、前辈指点reg变量不要跨always块赋值,确实,这样容易“打架”(也就是时序矛盾),以及时序逻辑电路的if-else语句块可以不...
If the expression (y > 5) is true, then variablexwill get the value inw, else the value inz. Number Format We are most familiar with numbers being represented as decimals. However, numbers can also be represented inbinary,octalandhexadecimal. By default, Verilog simulators treat numbers as...
只有一种情况我建议用always,那就是有很多if else语句,你用assign已经无法表达清楚的时候,这种情况下你可以用always@(*),其它情况一律用assign即可。 采用了上述的方法,大家也不用纠结什么阻塞赋值非阻塞赋值了。你自己需要写的逻辑块,其实都是组合逻辑,这种情况全部用=即可。
Notice the use of the if statement if (x[4] == 1'b1) pcode = 3'b100; else if (x[3] == 1'b1) pcode = 3'b011; The general syntax of an if statement is as follows if [boolean-expr] begin [procedural statement] ; [procedural statement] ; end else begin [procedural ...
A constant part-select of a vector reg or net is given with the following syntax: vect[msb_expr:lsb_expr] 例如: vect[31:0] Both expressions shall be constant expressions. The first expression has to address a more significant bit than the second expression. If the part-select is out of...
Error (10170): Verilog HDL syntax error at de1sign.v(16) near text "begin"; expecting a description If anybody at all could clarify this error for me, and tell me how to solve it, it would be greatly appreciated. Translate 0 Kudos Copy link Reply Altera_Forum Honored Contributor ...
always @(A, En) // 2001, 2005 syntax begin Y = 8’b1111_1111; //设译码器输出的默认值 for(k = 0; k <= 7; k = k+1) //下面的if-else语句循环8次 if ((En==1) && (A== k) ) Y[k] = 0; //当En=1时,根据A进行译码 ...
1、`define BPS_PAR_2 2604 //波特率为9600时的分频计数值的一半，用于数据采样2、 else if(cnt == `BPS_PARA_2) clk_bps_r <= 1'b1; 这二行，你看出错误了吗？你定义的是BPS_PAR_2，但是你写成了BPS_PARA_2。改为 else if(cnt == `BPS_PAR_2) clk_bps_r <= 1'b1;