verilog语言实现数字密码锁
时间: 2023-09-24 21:05:51 浏览: 59
以下是一个用 Verilog 实现的数字密码锁的简单框架:
```
module password_lock (
input clk,
input rst,
input [3:0] input_key,
input [3:0] password [3:0],
output reg unlocked
);
reg [3:0] current_password_digit;
reg [3:0] entered_password [3:0];
reg [2:0] digit_count;
always @ (posedge clk) begin
if (rst) begin
current_password_digit <= 4'b0000;
entered_password <= '{4'b0000, 4'b0000, 4'b0000, 4'b0000};
digit_count <= 3'b000;
unlocked <= 1'b0;
end else begin
// Check if any keys have been pressed
if (input_key != 4'b1111) begin
if (digit_count < 3) begin
entered_password[digit_count] <= input_key;
digit_count <= digit_count + 1;
end else begin
// If all digits have been entered, check if the password is correct
if (entered_password == password) begin
unlocked <= 1'b1;
end else begin
unlocked <= 1'b0;
end
end
end
// Increment the current password digit every 10 clock cycles
if (clk % 10 == 0) begin
current_password_digit <= current_password_digit + 1;
if (current_password_digit > 4'b1001) begin
current_password_digit <= 4'b0000;
end
end
end
end
endmodule
```
这个密码锁模块有一个 4 位的输入(`input_key`),代表用户输入的数字。还有一个 4x4 的输入(`password`),代表正确的密码。如果用户输入了正确的密码,`unlocked` 信号将被设置为 1,表示锁已经被解开。