function signed [1:0] ADD;//输出 input A, B, CIN;//输入 reg S, COUT; begin S = A ^ B ^ CIN; COUT = (A&B) | (A&CIN) | (B&CIN); ADD = {COUT, S}; end endfunction assign S0 = ADD (A[0], B[0], CIN),//例化的时候只需要例化输入 S1 = ADD (A[1], B[1], S...
这个是用c语言写电路。那个for里面的i需要定义为genvar i;另外从你写的逻辑看,你是希望那个shift_reg不断的变化,但是你这么写的话。系统会认为是一个组合逻辑,所以会立刻计算出结果。你需要写成时续逻辑的电路,用always @(posedge clk)begin ...end 兄弟,北化的,师从何宾?
my_var);//Displays in hex//$fwrite does not print the newline char ''automatically at//the end of each line; So we can predict all the values printed//below to appear on the same line$fdisplay
我这段verilog为什么报错 i is not a constant?改成[(i*8-8)+:8]试试。不过还有很多其他问题,...
这个错误的直接原因是Verilog不支持Data_i[i*8-1:i*8-8] 这种语法。如果把向量的位选取写成vect[...
module module_name//模块名称(port_list);//输入输出信号列表//说明reg//寄存器wire//线网parameter//参数input//输入信号output//输出信号inout//输入输出信号function//函数task//任务...//语句Initial statement Always statement Module instantiation//Gate instantiation//UDPinstantiation//Continuous assignment/...
8 initial $display("wow is defined"); 9 `ifdef nest_one 10 initial $display("nest_one is defined"); 11 `ifdef nest_two 12 initial $display("nest_two is defined"); 13 `else 14 initial $display("nest_two is not defined");
assign 不能放在if里,除非是generate if。如果用always,就不能用assign
1)所有综合工具都支持的结构:always,assign,begin,end,case,wire,tri,aupply0,supply1,reg,integer,default,for,function,and,nand,or,nor,xor,xnor,buf,not,bufif0,bufif1,notif0,notif1,if,inout,input,instantitation,module,negedge,posedge,operators,output,parameter。 2)所有综合工具都不支持的结构:time...
(8'd200); end function void check_addr(bit [7:0] addr); int intq[$]; intq = scb.find_index() with (item.addr == addr); case (intq.size()) 0: $display("Addr %0d not found in scoreboard", addr); 1: scb.delete(intq[0]); default: $display("ERROR: Multiple hits for ...