NOTE : As a good coding practice, there should be only one port identifier per line, as shown below Examples : Port Declaration 1 input clk ; // clock input 2 input [15:0] data_in ; // 16 bit data input bus 3 output [7:0] count ; // 8 bit counter output 4 inout data_bi...
Any code that contains the above constructs are not synthesizable, but within synthesizable constructs, bad coding could cause synthesis issues. I have seen codes where engineers code a flip-flop with both posedge of clock and negedge of clock in sensitivity list....
(1) 定位 find with, find_first with, find_last with找的是数组内元素 find_index with, find_first_index with , find_last_index with找的是索引号 查看代码 查看代码 modulearray_locator;intarray[9] = '{1,2,3,4,5,6,7,8,9};intres[$];initialbeginres= array.find(x)with(x>3);$displ...
(2) Enumeration 枚举类型,类似状态机 写了三个例子,包含枚举的声明、变量类型以及一些操作。 自定义一个枚举类型(traffic_lights),然后例化一个状态变量,monitor函数监控变量变化的时间($time)、变量名(.name),变量值 moduleenumeration_basic;//enum {red, green, yellow} traffic_lights;typedefenum{red, green,...
Surely we need to "assign" F a value, so coding "assign F = " would be a good start... Ok, so A xnor B... We don't have an xnor symbol! No worries, we can make A XOR B then invert the entire term! This leads to a final solution of "assign F = ~(A ^ B);" ...
Let’s start with a simple class with a bit vector. The class has a parameter for the width of the vector. (Good programming practice is to always have a default for your parameters.) class Vector #(parameter WIDTH=1); bit [WIDTH-1:0] data; ...
9.0 Synthesis coding styles Sunburst Design Assumption: it is generally a bad coding practice to give the synthesis tool different information about the functionality of a design than is given to the simulator. Whenever either full_case or parallel_case directives are added to the Verilog source ...
Zynq requires PS7 block PS7 [DRC ZPS7-1] PS7 block required: The PS7 cell must be used in this Zynq design in order to enable correct default configuration. I'm new at Verilog coding, so please let m know what is the problem....
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(3)Arrays SV的数组类型: 合并数组,非合并数组,动态数组,联合数组,队列 根据数组大小是否固定,可分为固定数组(静态数组)和动态数组 1. 合并数组 packed arrays 存储方式是连续的,中间没有闲置空间 例如,32bit的寄存器,可以看成是4个8bit的数据,或者也可以看成