task ADD;//ADD为task名称,这与上面的function不同 input A, B, CIN;//输入 output [1:0] C;//输出 reg [1:0] C; reg S, COUT; begin S = A ^ B ^ CIN; COUT = (A&B) | (A&CIN) | (B&CIN); C = {COUT, S}; end endtask always @(A or B or
r = $fscanf(file, " %b %b %b\n", a, b, expect); // Wait just before the end of cycle to do compare #(cycle - 1) $display("%d %b %b %b %b", $stime, a, b, expect, out); $strobe_compare(expect, out); end // while not EOF r = $fcloser(file); $stop; end /...
As one simple example, let's assume that an engineer is designing a circuit that makes use of an existing module to perform a mathematical function such as afast Fourier transform(FFT). A Verilog representation of this function might take a long time to simulate, which would be a pain if...
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//...
Assign C=A+B; C的最高位用来存放进位。 6、关系运算符: 关系运算符:<,>,<=,>= 和算术操作符一样,可以进行有符号和无符号运算,取决于数据类型是reg,net还是integer。 7、相等运算符:==,!= 注意:===和!==是不可综合的。 可以进行有符号或无符号操作,取决于数据类型 ...
17.Error: Can't name logic scfifo0 of instance "inst" -- has same name as current design file 原因:模块的名字和project的名字重名了 措施:把两个名字之一改一下,一般改模块的名字 18.Warning: Using design file lpm_fifo0.v, which is not specified as a design file for the current project,...
// It is wrong!! always@(posedge a or negedge a)begin b = not a; end 注意,只有时序逻辑才能用posedge和negedge关键字,虽然从代码事件解释来看上述两例好像功能相似,但是若出现沿事件关键字,则编译器会将程序块综合为时序逻辑,而这个世界上目前还没有既能够敏感一个信号上升沿又能够敏感这个信号下降沿的触...
Cant name logic function scfifo0 of instance inst -- function has same name as current design file 原因:模块的名字和 project 的名字重名了 措施:把两个名字之一改一下,一般改模块的名字 19.Warning: Using design file lpm_fifo0.v, which is not specified as a design file for the current project...
同时，代码的写法应当使别人理解它所需的时间最小化，也就是说我们写的代码是给人看的而不是给机器看...
Python Graphics: Shape with function? This assignment is asking me to draw a star function with four parameters. "center point of the star size of the star color of the lines of the star window used to draw the star" This is the......