写一个分频器 输入时钟为50MHZ ,输出时钟125KHZ和1pps
时间: 2024-02-21 19:58:17 浏览: 133
好的,我可以为您提供一个简单的分频器的Verilog代码,用于将输入时钟50MHz分频为输出时钟125KHz和1pps。代码如下:
```verilog
module clk_divider (
input clk_in,
output reg clk_out_125kHz,
output reg clk_out_1pps
);
reg [26:0] counter_125kHz = 0; // 27-bit counter for dividing 50MHz into 125KHz
reg [26:0] counter_1pps = 0; // 27-bit counter for dividing 50MHz into 1pps
always @(posedge clk_in) begin
if (counter_125kHz == 26'd623) begin // 50MHz / 125KHz = 400, so 624-1=623
counter_125kHz <= 0;
clk_out_125kHz <= ~clk_out_125kHz; // Toggle the 125KHz output clock every 624th cycle
end else begin
counter_125kHz <= counter_125kHz + 1;
end
if (counter_1pps == 26'd49999999) begin // 50MHz / 50M = 1, so 50M / 1pps = 50M
counter_1pps <= 0;
clk_out_1pps <= ~clk_out_1pps; // Toggle the 1pps output clock every 50Mth cycle
end else begin
counter_1pps <= counter_1pps + 1;
end
end
endmodule
```
该模块有一个输入时钟 clk_in,带有一个50MHz的时钟信号。输出时钟 clk_out_125kHz 被分频为125KHz,clk_out_1pps 被分频为1pps。在模块内部,使用两个27位计数器来计算时钟信号的周期数,以便将输入时钟分频为输出时钟。当计数器计数到 623 时,输出时钟 clk_out_125kHz 反转一次,从而产生 125KHz 的时钟信号。当计数器计数到 49,999,999 时,输出时钟 clk_out_1pps 反转一次,从而产生 1pps 的时钟信号。
请将该代码添加到您的 Verilog 项目中,并在您的设计中实例化该模块以生成输出时钟。
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