平衡木网站建设,wordpress头部高度,设计素材库,网站建设制作设计优化兰州03_led_horse_run_v1
在Verilog中实现跑马灯通常涉及到使用一个计数器来控制LED灯的亮灭顺序。 跑马灯是一种常见的电子显示方式#xff0c;它通过控制多个LED灯的顺序点亮#xff0c;形成一种动态的视觉效果#xff0c;看起来就像灯在“跑”一样。
更新
使用dip开关控制…03_led_horse_run_v1
在Verilog中实现跑马灯通常涉及到使用一个计数器来控制LED灯的亮灭顺序。 跑马灯是一种常见的电子显示方式它通过控制多个LED灯的顺序点亮形成一种动态的视觉效果看起来就像灯在“跑”一样。
更新
使用dip开关控制跑马灯的速度和方向
知识点
循环移位寄存器的使用两种不同的组合逻辑赋值风格(assign, always(*))灵活利用参数设计可复用模块(模块级参数局部参数)
module led_horse_run #(parameter LED_ON 1b0, //led active lowparameter CLK_FREQ 50*1000*1000 //frequency of input clock
)(input clk,input rst_n,input wire [5:0] dip_u6,output reg [5:0] led
);//
//Local parameter, same as const in c/c
//For 50Mhz clock,
//one second count to 50*1000*1000
//one millisecond count to 50*1000
//localparam ONE_SECOND CLK_FREQ;
localparam HALF_SECOND ONE_SECOND / 2;
localparam ONE_MSECOND ONE_SECOND / 1000;//-------------------------------------------
//control the running speed and direction
//according to the status of dip keys
wire [1:0] speed dip_u6[1:0];
wire direct dip_u6[5];//First style of assignment for combinational logic, (not for sequential logic)
//Note: left value must be wire type, here wire [31:0] count_max;
wire [31:0] count_max;
assign count_max (speed 0) ? ONE_MSECOND * 2000 :(speed 1) ? ONE_MSECOND * 1000 :(speed 2) ? ONE_MSECOND * 500 : ONE_MSECOND * 200;
/*
//another style of assignment of combinational logic
//Note: left value must be reg type, here reg [31:0] count_max;
reg [31:0] count_max;
always (*) begincount_max (speed 0) ? ONE_MSECOND * 2000 :(speed 1) ? ONE_MSECOND * 1000 :(speed 2) ? ONE_MSECOND * 500 : ONE_MSECOND * 200;
end
*///---------------------------------------------------------
reg [31:0] count;
wire time_on (count count_max-1);always (posedge clk) beginif(~rst_n) count 0;else if(time_on) count 0;else count count 1;
endwire [5:0] init_led_status (LED_ON 1b1) ? 6b000001 : 6b111110;always (posedge clk) beginif(~rst_n) led init_led_status;else if(time_on) beginif(direct 1b1) led {led[4:0], led[5]} ; //shift leftelse led {led[0],led[5:1]} ; //shift rightend//else led led;
endendmodule
扩展思维
适了解流水灯和跑马灯的区别适当修改上面的跑马灯代码实现流水灯的效果。
