用Verilog语言写一个完整的数字钟
时间: 2023-06-10 19:07:32 浏览: 50
以下是一个简单的数字时钟的Verilog代码,它使用了一个时钟分频器,一个时钟计数器和七段数码管显示器。
```
module digital_clock(
input clk,
output reg [3:0] hour_tens, hour_ones, minute_tens, minute_ones, second_tens, second_ones,
output seg_dp, seg_g, seg_f, seg_e, seg_d, seg_c, seg_b, seg_a
);
wire [20:0] counter;
wire [3:0] counter_100ms;
wire [3:0] counter_sec;
wire [3:0] counter_min;
wire [3:0] counter_hr;
assign seg_dp = 1'b1; // decimal point
assign seg_g = (counter_sec[0] || counter_sec[3] || counter_100ms[1] || counter_100ms[3]);
assign seg_f = (counter_sec[1] || counter_sec[3] || counter_100ms[0] || counter_100ms[2]);
assign seg_e = (counter_sec[2] || counter_sec[3] || counter_100ms[1] || counter_100ms[3]);
assign seg_d = (counter_min[0] || counter_min[3] || counter_100ms[1] || counter_100ms[3]);
assign seg_c = (counter_min[1] || counter_min[3] || counter_100ms[0] || counter_100ms[2]);
assign seg_b = (counter_min[2] || counter_min[3] || counter_100ms[1] || counter_100ms[3]);
assign seg_a = (counter_hr[0] || counter_hr[3] || counter_100ms[0] || counter_100ms[2]);
assign hour_tens = counter_hr[2:1];
assign hour_ones = counter_hr[1:0];
assign minute_tens = counter_min[2:1];
assign minute_ones = counter_min[1:0];
assign second_tens = counter_sec[2:1];
assign second_ones = counter_sec[1:0];
// 1 Hz signal
div1 div1(clk, counter[20], counter[19]);
// 10 Hz signal
div10 div10(clk, counter[19], counter[18]);
// 100 Hz signal
div100 div100(clk, counter[18], counter_100ms[3], counter_100ms[2], counter_100ms[1], counter_100ms[0]);
// 1 second signal
div1000 div1000(clk, counter[17], counter_sec[3], counter_sec[2], counter_sec[1], counter_sec[0]);
// 1 minute signal
div60000 div60000(clk, counter[14], counter_min[3], counter_min[2], counter_min[1], counter_min[0]);
// 1 hour signal
div3600000 div3600000(clk, counter[8], counter_hr[3], counter_hr[2], counter_hr[1], counter_hr[0]);
endmodule
// 1 Hz signal
module div1(
input clk,
input reset,
output reg out
);
always @(posedge clk or posedge reset) begin
if (reset) begin
out <= 1'b0;
end else begin
out <= !out;
end
endmodule
// 10 Hz signal
module div10(
input clk,
input reset,
output reg out
);
always @(posedge clk or posedge reset) begin
if (reset) begin
out <= 1'b0;
end else begin
out <= ~reset && (out == 5'b10000) ? 1'b0 : (out + 1);
end
endmodule
// 100 Hz signal
module div100(
input clk,
input reset,
output reg [3:0] out3, out2, out1, out0
);
always @(posedge clk or posedge reset) begin
if (reset) begin
out3 <= 4'b0;
out2 <= 4'b0;
out1 <= 4'b0;
out0 <= 4'b0;
end else begin
out3 <= ~reset && (out3 == 4'b1001) ? 4'b0 : (out3 + 1);
out2 <= ~reset && (out3 == 4'b1001 && out2 == 4'b1001) ? 4'b0 : (out2 == 4'b1001 ? out2 : (out2 + 1));
out1 <= ~reset && (out3 == 4'b1001 && out2 == 4'b1001 && out1 == 4'b1001) ? 4'b0 : (out1 == 4'b1001 ? out1 : (out1 + 1));
out0 <= ~reset && (out3 == 4'b1001 && out2 == 4'b1001 && out1 == 4'b1001 && out0 == 4'b1001) ? 4'b0 : (out0 == 4'b1001 ? out0 : (out0 + 1));
end
endmodule
// 1 second signal
module div1000(
input clk,
input reset,
output reg [3:0] out3, out2, out1, out0
);
always @(posedge clk or posedge reset) begin
if (reset) begin
out3 <= 4'b0;
out2 <= 4'b0;
out1 <= 4'b0;
out0 <= 4'b0;
end else begin
out3 <= ~reset && (out3 == 4'b1010) ? 4'b0 : (out3 == 4'b1001 ? (out2 == 4'b1001 ? (out1 == 4'b1001 ? (out0 == 4'b1001 ? 4'b0 : (out0 + 1)) : (out1 + 1)) : (out2 + 1)) : out3 + 1);
out2 <= ~reset && (out3 == 4'b1010 && out2 == 4'b1001) ? 4'b0 : (out3 == 4'b1010 && out2 == 4'b1001 ? out2 : (out2 == 4'b1001 ? out2 : (out2 + 1)));
out1 <= ~reset && (out3 == 4'b1010 && out2 == 4'b1001 && out1 == 4'b1001) ? 4'b0 : (out3 == 4'b1010 && out2 == 4'b1001 && out1 == 4'b1001 ? out1 : (out1 == 4'b1001 ? out1 : (out1 + 1)));
out0 <= ~reset && (out3 == 4'b1010 && out2 == 4'b1001 && out1 == 4'b1001 && out0 == 4'b1001) ? 4'b0 : (out3 == 4'b1010 && out2 == 4'b1001 && out1 == 4'b1001 && out0 == 4'b1001 ? out0 : (out0 == 4'b1001 ? out0 : (out0 + 1)));
end
endmodule
// 1 minute signal
module div60000(
input clk,
input reset,
output reg [3:0] out3, out2, out1, out0
);
always @(posedge clk or posedge reset) begin
if (reset) begin
out3 <= 4'b0;
out2 <= 4'b0;
out1 <= 4'b0;
out0 <= 4'b0;
end else begin
out3 <= ~reset && (out3 == 4'b0110) ? 4'b0 : (out3 == 4'b0101 ? (out2 == 4'b1001 ? (out1 == 4'b1001 ? (out0 == 4'b1001 ? 4'b0 : (out0 + 1)) : (out1 + 1)) : (out2 + 1)) : out3 + 1);
out2 <= ~reset && (out3 == 4'b0110 && out2 == 4'b1001) ? 4'b0 : (out3 == 4'b0110 && out2 == 4'b1001 ? out2 : (out2 == 4'b1001 ? out2 : (out2 + 1)));
out1 <= ~reset && (out3 == 4'b0110 && out2 == 4'b1001 && out1 == 4'b1001) ? 4'b0 : (out3 == 4'b0110 && out2 == 4'b1001 && out1 == 4'b1001 ? out1 : (out1 == 4'b1001 ? out1 : (out1 + 1)));
out0 <= ~reset && (out3 == 4'b0110 && out2 == 4'b1001 && out1 == 4'b1001 && out0 == 4'b1001) ? 4'b0 : (out3 == 4'b0110 && out2 == 4'b1001 && out1 == 4'b1001 && out0 == 4'b1001 ? out0 : (out0 == 4'b1001 ? out0 : (out0 + 1)));
end
endmodule
// 1 hour signal
module div3600000(
input clk,
input reset,
output reg [3:0] out3, out2, out1, out0
);
always @(posedge clk or posedge reset) begin
if (reset) begin
out3 <= 4'b0;
out2 <= 4'b0;
out1 <= 4'b0;
out0 <= 4'b0;
end else begin
out3 <= ~reset && (out3 == 4'b0001) ? 4'b0 : (out3 == 4'b0000 ? (out2 == 4'b1001 ? (out1 == 4'b1001 ? (out0 == 4'b1001 ? 4'b0 : (out0 + 1)) : (out1 + 1)) : (out2 + 1)) : out3 + 1);
out2 <= ~reset && (out3 == 4'b0001 && out2 == 4'b1001) ? 4'b0 : (out3 == 4'b0001 && out2 == 4'b1001 ? out2 : (out2 == 4'b1001 ? out2 : (out2 + 1)));
out1 <= ~reset && (out3 == 4'b0001 && out2 == 4'b1001 && out1 == 4'b1001) ? 4'b0 : (out3 == 4'b0001 && out2 == 4'b1001 && out1 == 4'b1001 ? out1 : (out1 == 4'b1001 ? out1 : (out1 + 1)));
out0 <= ~reset && (out3 == 4'b0001 && out2 == 4'b1001 && out1 == 4'b1001 && out0 == 4'b1001) ? 4'b0 : (out3 == 4'b0001 && out2 == 4'b1001 && out1 == 4'b1001 && out0 == 4'b1001 ? out0 : (out0 == 4'b1001 ? out0 : (out0 + 1)));
end
endmodule
```
该代码实现了一个数字时钟,使用了七段数码管显示器来显示当前时间。其中,时钟信号通过时钟分频器逐步降频,最终得到1 Hz、10 Hz、100 Hz、1秒、1分钟和1小时的信号。时钟计数器通过这些信号来计算当前时间,并将其转换为适当的格式以供七段数码管显示。