// SYS_CLK_FREQ表示输入时钟频率;TARGET_CLK_FREQ表示目标时钟频率;N表示计数器的位宽 module clkdiv #(parameter SYS_CLK_FREQ = 100_000_000, TARGET_CLK_FREQ = 10_000_000, N = 3)( input sys_clk, input sys_rst_n, output clk_out ); // 请在下面添加代码,对输入时钟(100MHz)进行10分频 // 代码量预计10~13行 /****** Begin / / End ******/ endmodule输入信号: 时钟周期为10ns(100MHz); 0ns: sys_clk = 0, sys_rst_n = 0; 20ns: sys_rst_n = 1; 复位信号无效后,再经历20个时钟上升沿。 预期输出: VCD info: dumpfile waveform.vcd opened for output. At time 0ns: sys_rst_n = 0, clk_out = x At time 5ns: sys_rst_n = 0, clk_out = 0 At time 20ns: sys_rst_n = 1, clk_out = 0 At time 65ns: sys_rst_n = 1, clk_out = 1 At time 115ns: sys_rst_n = 1, clk_out = 0 At time 165ns: sys_rst_n = 1, clk_out = 1 At time 215ns: sys_rst_n = 1, clk_out = 0
时间: 2024-01-24 18:19:56 浏览: 126
clkdiv.rar_clk div_clkdiv_verilog clkdiv_wantu5w_时钟分频fpga
module clkdiv #(parameter SYS_CLK_FREQ = 100_000_000, TARGET_CLK_FREQ = 10_000_000, N = 3)(
input sys_clk,
input sys_rst_n,
output clk_out
);
reg [N-1:0] counter;
reg clk_div;
// 初始化计数器和分频信号
initial begin
counter = 0;
clk_div = 0;
end
always @(posedge sys_clk or negedge sys_rst_n) begin
if (!sys_rst_n) begin
counter <= 0;
clk_div <= 0;
end
else begin
counter <= counter + 1;
if (counter >= SYS_CLK_FREQ / TARGET_CLK_FREQ - 1) begin
counter <= 0;
clk_div <= ~clk_div;
end
end
end
assign clk_out = clk_div;
endmodule
// 代码解释:
// 通过一个计数器对输入时钟进行计数,当计数器达到一定值时,翻转分频信号
// 分频信号的翻转频率为目标时钟频率,即输入时钟的1/N
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