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基于FPGA的数字时钟（使用vivado）_fpga计数器怎么表示时间vivado

作者：黑客灵魂 | 2024-07-07 19:27:59

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fpga计数器怎么表示时间vivado

基于FPGA的数字时钟（使用vivado）

使用两个四位数码管，可以实现时钟分钟秒钟显示，高两位设置不显示。

换了一个新开发板，nexys4ddr，资料不多，最多使用的就是一本英文Reference Manual。

其实是老师觉得我计数器还差点，得再练练。

原件选择

Digilent NEXYS4DDR

Vivado2018.3

设计方案

60进制秒钟计数然后进1分钟

60进制分钟计数然后进1小时

设计思想

1、设计时钟一，用于计数器计一秒，根据芯片晶振选择计算

2、设计时钟二，用于计数60秒

3、设计时钟三，用于计数60分

4、设计时钟四，用于计数24时

5、设计时钟五，用于选择数码管刷新频率

代码

module	clock(
		input			sclk					,
		input			s_rst_n					,
		input			YEAR					,
		input			MONTH					,
		input			DAY						,
		
		output	reg		[7:0]	SEG				,
		output	reg		[7:0]	SMG					
);
localparam		DELAY_1S			=			'd9_999_999;
localparam		DELAY_1M			=			'd59;
localparam		DELAY_1H			=			'd59;
localparam		DELAY_1D			=			'd23;
localparam		DELAY_10MS  		=			'd199_999;

reg		[3:0]			TIME_8					;

reg		[25:0]			cnt_1s					;
reg		[5:0]			cnt_1m					;
reg		[5:0]			cnt_1h					;
reg		[4:0]			cnt_1d					;

reg		[18:0]			cnt_10ms				;

reg		[7:0]			SEG1					;
reg		[7:0]			SEG2					;
reg		[7:0]			SEG3					;
reg		[7:0]			SEG4					;
reg		[7:0]			SEG5					;
reg		[7:0]			SEG6					;
reg		[7:0]			SEG7					;
reg		[7:0]			SEG8					;

localparam		NULL				=			8'b1111_1111;
localparam		num0				=			8'b1100_0000;
localparam		num9				=           8'b1001_0000;
localparam		num8				=           8'b1000_0000;
localparam		num7				=           8'b1111_1000;
localparam		num6				=           8'b1000_0010;
localparam		num5				=           8'b1001_0010;
localparam		num4				=           8'b1001_1001;
localparam		num3				=           8'b1011_0000;
localparam		num2				=           8'b1010_0100;
localparam		num1				=           8'b1111_1001;
//秒计时
always @ (posedge sclk or negedge s_rst_n)	
begin
		if(s_rst_n == 1'b0)
				cnt_1s		<=			'd0;				
		else if (cnt_1s == DELAY_1S)				
				cnt_1s		<=			'd0;
		else  
				cnt_1s 	<=			cnt_1s + 1'b1;
end
//分计时
always @ (posedge sclk or negedge s_rst_n)	
begin
		if(s_rst_n == 1'b0)
				cnt_1m		<=			'd0;				
		else if (cnt_1s == DELAY_1S && cnt_1m == DELAY_1M)				
				cnt_1m		<=			'd0;
		else if (cnt_1s == DELAY_1S) 
				cnt_1m 	<=			cnt_1m + 1'b1;
end
//时计时
always @ (posedge sclk or negedge s_rst_n)	
begin
		if(s_rst_n == 1'b0)
				cnt_1h		<=			'd0;				
		else if (cnt_1s == DELAY_1S && cnt_1m == DELAY_1M && cnt_1h == DELAY_1H)				
				cnt_1h		<=			'd0;
		else if (cnt_1s == DELAY_1S && cnt_1m == DELAY_1M)  
				cnt_1h 	<=			cnt_1h + 1'b1;
end
//天计时
always @ (posedge sclk or negedge s_rst_n)	
begin
		if(s_rst_n == 1'b0)
				cnt_1d		<=			'd0;				
		else if (cnt_1s == DELAY_1S && cnt_1m == DELAY_1M && cnt_1h == DELAY_1H && cnt_1d == DELAY_1D)	
				cnt_1d		<=			'd0;
		else if (cnt_1s == DELAY_1S && cnt_1m == DELAY_1M && cnt_1h == DELAY_1H)  
				cnt_1d 	<=			cnt_1d + 1'b1;
end
//数码管刷新
always @ (posedge sclk or negedge s_rst_n)	
begin
		if(s_rst_n == 1'b0)
				cnt_10ms		<=			'd0;				
		else if (cnt_10ms == DELAY_10MS)				
				cnt_10ms		<=			'd0;
		else  
				cnt_10ms 	<=			cnt_10ms + 1'b1;
end
//位选1
always @ (posedge sclk or negedge s_rst_n)	
begin
		if(s_rst_n == 1'd0)				
				TIME_8	<=			1'd0;
		else if (TIME_8 == 8 && cnt_10ms == DELAY_10MS)				
				TIME_8	<=			1'd1;				
		else  if (cnt_10ms == DELAY_10MS) 
				TIME_8  	<=			TIME_8 + 1'd1;
end
//位选2
always @ (posedge sclk or negedge s_rst_n)	
begin
		if(s_rst_n == 1'd0)				
				SEG		<=			8'b0000_0000;			
		else if (TIME_8 == 01)
				SEG		<=			8'b1111_1110;
		else if (TIME_8 == 02)
				SEG		<=			8'b1111_1101;
		else if (TIME_8 == 03)
				SEG		<=			8'b1111_1011;
		else if (TIME_8 == 04)
				SEG		<=			8'b1111_0111;
		else if (TIME_8 == 05)
				SEG		<=			8'b1110_1111;
		else if (TIME_8 == 06)
				SEG		<=			8'b1101_1111;
		else if (TIME_8 == 07)
				SEG		<=			8'b1011_1111;
		else if (TIME_8 == 08)
				SEG		<=			8'b0111_1111;
end
//段选
always @ (posedge sclk or negedge s_rst_n)	
begin
		if(s_rst_n == 1'd0)				
				SMG 	<=			8'b0000_0000;			
		else if (TIME_8 == 01)
				SMG 	<=			SEG4;		
		else if (TIME_8 == 02)
				SMG 	<=			SEG3;		
		else if (TIME_8 == 03)
				SMG 	<=			SEG2;		
		else if (TIME_8 == 04)
				SMG 	<=			SEG1;
		else if (TIME_8 == 05)
				SMG 	<=			SEG6;
		else if (TIME_8 == 06)
				SMG 	<=			SEG5;
		else if (TIME_8 == 07)
				SMG 	<=			NULL;
		else if (TIME_8 == 08)
				SMG 	<=			NULL;
								
end
//秒显示
always@(*)
begin		
			case(cnt_1m)
				00:						{SEG3,SEG4}	<={num0,num0};
				01:						{SEG3,SEG4}	<={num0,num1};
				02:						{SEG3,SEG4}	<={num0,num2};	
				03:						{SEG3,SEG4}	<={num0,num3};	
				04:						{SEG3,SEG4}	<={num0,num4};	
				05:						{SEG3,SEG4}	<={num0,num5};	
				06:						{SEG3,SEG4}	<={num0,num6};	
				07:						{SEG3,SEG4}	<={num0,num7};	
				08:						{SEG3,SEG4}	<={num0,num8};	
				09:						{SEG3,SEG4}	<={num0,num9};
				
				10:						{SEG3,SEG4}	<={num1,num0};	
				11:						{SEG3,SEG4}	<={num1,num1};	
				12:						{SEG3,SEG4}	<={num1,num2};	
				13:						{SEG3,SEG4}	<={num1,num3};	
				14:						{SEG3,SEG4}	<={num1,num4};	
				15:						{SEG3,SEG4}	<={num1,num5};	
				16:						{SEG3,SEG4}	<={num1,num6};	
				17:						{SEG3,SEG4}	<={num1,num7};	
				18:						{SEG3,SEG4}	<={num1,num8};	
				19:						{SEG3,SEG4}	<={num1,num9};
				
				20:						{SEG3,SEG4}	<={num2,num0};	
				21:						{SEG3,SEG4}	<={num2,num1};
				22:						{SEG3,SEG4}	<={num2,num2};				
				23:						{SEG3,SEG4}	<={num2,num3};
				24:						{SEG3,SEG4}	<={num2,num4};
				25:						{SEG3,SEG4}	<={num2,num5};	
				26:						{SEG3,SEG4}	<={num2,num6};	
				27:						{SEG3,SEG4}	<={num2,num7};	
				28:						{SEG3,SEG4}	<={num2,num8};	
				29:						{SEG3,SEG4}	<={num2,num9};	
				
				30:						{SEG3,SEG4}	<={num3,num0};				
				31:						{SEG3,SEG4}	<={num3,num1};	
				32:						{SEG3,SEG4}	<={num3,num2};	
				33:						{SEG3,SEG4}	<={num3,num3};	
				34:						{SEG3,SEG4}	<={num3,num4};	
				35:						{SEG3,SEG4}	<={num3,num5};	
				36:						{SEG3,SEG4}	<={num3,num6};	
				37:						{SEG3,SEG4}	<={num3,num7};	
				38:						{SEG3,SEG4}	<={num3,num8};	
				39:						{SEG3,SEG4}	<={num3,num9};	
				
				40:						{SEG3,SEG4}	<={num4,num0};					
				41:						{SEG3,SEG4}	<={num4,num1};	
				42:						{SEG3,SEG4}	<={num4,num2};	
				43:						{SEG3,SEG4}	<={num4,num3};	
				44:						{SEG3,SEG4}	<={num4,num4};	
				45:						{SEG3,SEG4}	<={num4,num5};	
				46:						{SEG3,SEG4}	<={num4,num6};	
				47:						{SEG3,SEG4}	<={num4,num7};	
				48:						{SEG3,SEG4}	<={num4,num8};	
				49:						{SEG3,SEG4}	<={num4,num9};	
				
				50:						{SEG3,SEG4}	<={num5,num0};					
				51:						{SEG3,SEG4}	<={num5,num1};	
				52:						{SEG3,SEG4}	<={num5,num2};	
				53:						{SEG3,SEG4}	<={num5,num3};	
				54:						{SEG3,SEG4}	<={num5,num4};	
				55:						{SEG3,SEG4}	<={num5,num5};	
				56:						{SEG3,SEG4}	<={num5,num6};	
				57:						{SEG3,SEG4}	<={num5,num7};	
				58:						{SEG3,SEG4}	<={num5,num8};	
				59:						{SEG3,SEG4}	<={num5,num9};	
                                                                                     
			endcase
		
end                
//分显示
always@(*)
begin		
			case(cnt_1h)
				00:						{SEG1,SEG2}	<={num0,num0};
				01:						{SEG1,SEG2}	<={num0,num1};
				02:						{SEG1,SEG2}	<={num0,num2};	
				03:						{SEG1,SEG2}	<={num0,num3};	
				04:						{SEG1,SEG2}	<={num0,num4};	
				05:						{SEG1,SEG2}	<={num0,num5};	
				06:						{SEG1,SEG2}	<={num0,num6};	
				07:						{SEG1,SEG2}	<={num0,num7};	
				08:						{SEG1,SEG2}	<={num0,num8};	
				09:						{SEG1,SEG2}	<={num0,num9};
				
				10:						{SEG1,SEG2}	<={num1,num0};	
				11:						{SEG1,SEG2}	<={num1,num1};	
				12:						{SEG1,SEG2}	<={num1,num2};	
				13:						{SEG1,SEG2}	<={num1,num3};	
				14:						{SEG1,SEG2}	<={num1,num4};	
				15:						{SEG1,SEG2}	<={num1,num5};	
				16:						{SEG1,SEG2}	<={num1,num6};	
				17:						{SEG1,SEG2}	<={num1,num7};	
				18:						{SEG1,SEG2}	<={num1,num8};	
				19:						{SEG1,SEG2}	<={num1,num9};
				
				20:						{SEG1,SEG2}	<={num2,num0};	
				21:						{SEG1,SEG2}	<={num2,num1};
				22:						{SEG1,SEG2}	<={num2,num2};				
				23:						{SEG1,SEG2}	<={num2,num3};
				24:						{SEG1,SEG2}	<={num2,num4};
				25:						{SEG1,SEG2}	<={num2,num5};	
				26:						{SEG1,SEG2}	<={num2,num6};	
				27:						{SEG1,SEG2}	<={num2,num7};	
				28:						{SEG1,SEG2}	<={num2,num8};	
				29:						{SEG1,SEG2}	<={num2,num9};	
				
				30:						{SEG1,SEG2}	<={num3,num0};				
				31:						{SEG1,SEG2}	<={num3,num1};	
				32:						{SEG1,SEG2}	<={num3,num2};	
				33:						{SEG1,SEG2}	<={num3,num3};	
				34:						{SEG1,SEG2}	<={num3,num4};	
				35:						{SEG1,SEG2}	<={num3,num5};	
				36:						{SEG1,SEG2}	<={num3,num6};	
				37:						{SEG1,SEG2}	<={num3,num7};	
				38:						{SEG1,SEG2}	<={num3,num8};	
				39:						{SEG1,SEG2}	<={num3,num9};	
				
				40:						{SEG1,SEG2}	<={num4,num0};					
				41:						{SEG1,SEG2}	<={num4,num1};	
				42:						{SEG1,SEG2}	<={num4,num2};	
				43:						{SEG1,SEG2}	<={num4,num3};	
				44:						{SEG1,SEG2}	<={num4,num4};	
				45:						{SEG1,SEG2}	<={num4,num5};	
				46:						{SEG1,SEG2}	<={num4,num6};	
				47:						{SEG1,SEG2}	<={num4,num7};	
				48:						{SEG1,SEG2}	<={num4,num8};	
				49:						{SEG1,SEG2}	<={num4,num9};	
				
				50:						{SEG1,SEG2}	<={num5,num0};					
				51:						{SEG1,SEG2}	<={num5,num1};	
				52:						{SEG1,SEG2}	<={num5,num2};	
				53:						{SEG1,SEG2}	<={num5,num3};	
				54:						{SEG1,SEG2}	<={num5,num4};	
				55:						{SEG1,SEG2}	<={num5,num5};	
				56:						{SEG1,SEG2}	<={num5,num6};	
				57:						{SEG1,SEG2}	<={num5,num7};	
				58:						{SEG1,SEG2}	<={num5,num8};	
				59:						{SEG1,SEG2}	<={num5,num9};	                                                                                    
			endcase
		
end              
//时显示
always@(*)
begin		
			case(cnt_1d)
				00:						{SEG5,SEG6}	<={num0,num0};
				01:						{SEG5,SEG6}	<={num0,num1};
				02:						{SEG5,SEG6}	<={num0,num2};	
				03:						{SEG5,SEG6}	<={num0,num3};	
				04:						{SEG5,SEG6}	<={num0,num4};	
				05:						{SEG5,SEG6}	<={num0,num5};	
				06:						{SEG5,SEG6}	<={num0,num6};	
				07:						{SEG5,SEG6}	<={num0,num7};	
				08:						{SEG5,SEG6}	<={num0,num8};	
				09:						{SEG5,SEG6}	<={num0,num9};										
				10:						{SEG5,SEG6}	<={num1,num0};	
				11:						{SEG5,SEG6}	<={num1,num1};	
				12:						{SEG5,SEG6}	<={num1,num2};	
				13:						{SEG5,SEG6}	<={num1,num3};	
				14:						{SEG5,SEG6}	<={num1,num4};	
				15:						{SEG5,SEG6}	<={num1,num5};	
				16:						{SEG5,SEG6}	<={num1,num6};	
				17:						{SEG5,SEG6}	<={num1,num7};	
				18:						{SEG5,SEG6}	<={num1,num8};	
				19:						{SEG5,SEG6}	<={num1,num9};										 
				20:						{SEG5,SEG6}	<={num2,num0};	
				21:						{SEG5,SEG6}	<={num2,num1};
				22:						{SEG5,SEG6}	<={num2,num2};				
				23:						{SEG5,SEG6}	<={num2,num3};
			endcase
		
end   								

endmodule


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实物展示

由于这个代码将速率方法了十倍，故手机录像时，无法捕捉到动态刷新，只能贴一张图片了，不能做成pdf。
在这里插入图片描述

小结

换了开发板和平台，vivado编译一次是真的慢，也得慢慢琢磨。

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