用Verilog写一个偶数分频
时间: 2024-05-28 13:15:23 浏览: 19
module even_divider(
input clk_in,
output reg clk_out
);
reg [31:0] count;
always @(posedge clk_in) begin
if(count == 1) begin
clk_out <= ~clk_out;
count <= 0;
end else begin
count <= count + 1;
end
end
endmodule
// 2分频测试代码
module test_even_divider;
reg clk_in;
wire clk_out;
even_divider uut(
.clk_in(clk_in),
.clk_out(clk_out)
);
initial begin
$dumpfile("test_even_divider.vcd");
$dumpvars(0, test_even_divider);
clk_in <= 0;
#5;
repeat(10) begin
clk_in <= ~clk_in;
#10;
end
$finish;
end
endmodule
相关问题
Verilog写一个偶数分频,分屏数为0时,不进行分频
可以使用 Verilog 的 modulo 运算符 '%' 实现偶数分频,例如:
```
reg clk_div = 0;
always @(posedge input_clk) begin
if (clk_div == 0) begin
output_clk <= input_clk;
clk_div <= clk_div + 1;
end else if (clk_div % 2 == 0) begin
output_clk <= input_clk;
clk_div <= clk_div + 1;
end else begin
output_clk <= ~output_clk;
clk_div <= clk_div + 1;
end
end
```
这个 Verilog 代码实现了一个偶数分频器,当分频数为0时,不进行分频。具体地,输入时钟 `input_clk` 的上升沿触发了一个时钟域的 `always` 块。分频器通过 `clk_div` 计数器来计算时钟周期的个数。当 `clk_div` 的值为0时,输出时钟 `output_clk` 与输入时钟相同,因此不进行分频,同时 `clk_div` 加1;当 `clk_div` 的值为偶数时,输出时钟与输入时钟相同,同时 `clk_div` 加1;当 `clk_div` 的值为奇数时,输出时钟取反,同时 `clk_div` 加1。这个过程就实现了一个偶数分频器,当分频数为0时,不进行分频,直接输出与输入时钟相同的信号。
verilog实现占空比50%偶数分频
Null is a value that represents the absence of a meaningful or valid value. It is typically used in computer programming and databases to indicate that a variable or field has no assigned value or that a result is undefined or empty. In programming languages, null is often represented as a keyword or a special symbol, such as "null," "nil," or "NaN." It is important to handle null values properly in order to avoid errors and unexpected results in a program or system.
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