1-bit位宽的线网或寄存器类型 wire n1; reg d1; 向量vector: n-bit位宽的线网或寄存器类型 wire [3:0] n0; reg[3:0] d0; 4.数组array 在verilog中允许声明reg, wire, integer, time, real及其向量类型的数组 1 // y is an scalar reg array of depth=12, each 1-bit wide 2 reg y1[11:0]...
12、 this frequently for smaller #s)o = octal (who thinks in octal?, please avoid)Slide taken direct from Eric HoffmanNumbers in VerilogNumbers can have x or z characters as valuesx = unknown, z = High Impedance12h13x / 12-bit number with lower 4-bits unknownIf size is not specified...
注意:这里使用 iverilog 只有按下 ctrl+s 进行保存之后才能够检查报错,按下 ctrl+~ 可以查看报错信息,但是有一点问题就是即使代码全部正确也有可能出现报错,报错信息为:Unknown module type ,所以需要在插件配置的时候添加 -i 指令,这样可以避免这种报错,但是这样就会屏蔽所有报错: 安装Verilog_Testbench 插件 安装插件...
[data_type] [name_of_queue] [$]; string name_list [$]; // A queue of string elements bit [3:0] data [$]; // A queue of 4-bit elements logic [7:0] elements [$:127]; // A bounded queue of 8-bits with maximum size of 128 slots int q1 [$] = { 1, 2, 3, 4, 5 ...
In the image shown on the left, we have a flip-flop that can store 1 bit and the flip-flop on the right can store 4-bits. Other data-types integer Anintegeris a general purpose variable of 32-bits wide that can be used for other purposes while modeling hardware and stores integer va...
Lets take an exmaple code counter_opt.v to understand this case: At first going through code, we might be think that the design would contain 3 flops after synthesis as it seems to be a 3-bit counter. But, if we look closely, after a reset ,value of count is 000 .The value of...
reg [31:0] m [0:8191]; // 8192 x 32 bit memory reg [12:0] pc; // 13 bit program counter reg [31:0] acc; // 32 bit accumulator reg [15:0] ir; // 16 bit instruction register always begin ir = m [pc]; //fetch an instruction ...
数据名i; reg是reg型数据的确认标识符, [n-1:0]和[n:1]代表该数据的位宽,即该数据有几位(bit)。最后 跟着的是数据的名字。如果一次定义多个数据,数据名之间用逗号隔开。声明语句的最后要用分号表 示语句结束。看下面的几个例子: reg rega; //定义了一个一位的名为rega的reg型数据 reg [3:0] regb...
These operators compare operands and results a 1 bit scalar boolean value. The case equality and inequality operations can be used for unknown or high impedance(x or z) and if the two operands are unknown the result is a 1. If a=3'b010, b=3'b100, c=3'b111, d=3'b01z and e=3...
pwmData[3:0]defines a 4-element array of 1-bit entries. If you want to create a 4-bit register (this is not the same as a 4x 1-bit array), than the range goes on the other side: reg [3:0] pwmData; Share Improve this answer ...