quartus2数字时钟设计基本要求:能够正确显示时、分、秒,并有校时、半点报时和整点报时功能代码
时间: 2024-06-08 15:07:27 浏览: 223
EDA FPGA 数字钟
首先,需要确定使用的FPGA型号和时钟频率,以便进行设计和时序分析。然后,需要设计时钟模块来产生适当的时钟信号。时钟模块应该能够产生1秒钟中断一次的时钟脉冲,并且应该有一个分频器来分频产生适当的时钟信号,以表示时分秒。
接下来,需要设计计数器模块来计数时钟脉冲,并将其转换为数字时、分、秒的形式。计数器应该能够正确地计数,并且应该具有清零和复位功能。
校时功能可以通过增加一个手动校准输入来实现。当用户按下校准按钮时,可以将当前的时间值与用户输入的时间值进行比较,并进行必要的调整。
半点报时和整点报时功能可以通过添加一个报时模块来实现。该模块应该能够检测到半点和整点,并在这些时间点触发相应的报时信号输出。
最后,需要设计一个显示模块来将数字时、分、秒转换为合适的格式,并将其显示在数字显示器上。可以使用七段数码管或LCD显示器来实现这个功能。
以下是一个基本的Verilog代码框架:
```verilog
module digital_clock (
input clk,
input rst,
input calibrate,
output reg [3:0] hour,
output reg [3:0] minute,
output reg [3:0] second,
output reg half_hour,
output reg hour_chime,
output reg half_hour_chime
);
reg [23:0] counter;
reg [3:0] hour_count, minute_count, second_count;
reg [1:0] state;
parameter IDLE = 2'b00, COUNT_SEC = 2'b01, COUNT_MIN = 2'b10, COUNT_HOUR = 2'b11;
assign half_hour = (minute_count == 30 && second_count == 0);
assign hour_chime = (hour_count != 0 && minute_count == 0 && second_count == 0);
assign half_hour_chime = (hour_count == 0 && minute_count == 30 && second_count == 0);
always @(posedge clk) begin
if (rst) begin
counter <= 0;
hour_count <= 0;
minute_count <= 0;
second_count <= 0;
state <= IDLE;
end else begin
counter <= counter + 1;
case (state)
IDLE:
if (calibrate) begin
state <= COUNT_SEC;
end
COUNT_SEC:
begin
if (counter == 24000000) begin // 1 second
counter <= 0;
second_count <= second_count + 1;
if (second_count == 60) begin
second_count <= 0;
state <= COUNT_MIN;
end
end
end
COUNT_MIN:
begin
if (counter == 144000000) begin // 1 minute
counter <= 0;
minute_count <= minute_count + 1;
if (minute_count == 60) begin
minute_count <= 0;
state <= COUNT_HOUR;
end
end
end
COUNT_HOUR:
begin
if (counter == 864000000) begin // 1 hour
counter <= 0;
hour_count <= hour_count + 1;
if (hour_count == 24) begin
hour_count <= 0;
end
end
end
endcase
end
end
always @(posedge clk) begin
if (rst) begin
hour <= 4'b0000;
minute <= 4'b0000;
second <= 4'b0000;
end else begin
hour <= hour_count;
minute <= minute_count;
second <= second_count;
end
end
endmodule
```
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