A second Gray code counter style, the one described below, uses two sets of registers, one a binary counter and a second to capture a binary-to-Gray converted value. The intent of this Gray code counter style #2 is to utilize the binary carry structure, simplify the Gray-to-binary conve...
A second Gray code counter style, the one described below, uses two sets of registers, one a binary counter and a second to capture a binary-to-Gray converted value. The intent of this Gray code counter style #2 is to utilize the binary carry structure, simplify the Gray-to-binary conve...
Hi, I am trying to read and write 8-bit Counter data Using Quartus and NIOS. In SOPC : I am assigning PIO : 1-bit input for enable PIO : 8-bit
1、偶数分频 module#(parameterN=4)div_N(clk_in,rst_n,clk_out);inputclk_in;inpotrst_n;outputclk_out;reg[clogb2(N)-1:0]counter;always@(posedgeclk_inornegedgerst_n)beginif(!rst_n)begincounter<=0;endelseif(counter==N/2-1)counter<=0;elsecounter<=counter+1;endalways@(posedgeclk_in...
来一个前面完成效果的 counter.v,代码太长了,放在后面附录。在 .v 文件里执行 Run Code,可以点右上角的小三角,可以右键菜单里运行,也可以快捷键 Ctrl + Alt + N。执行完成后在当前目录下会生成两个文件 run.vvp 和 run.vcd。右键 run.vcd 执行 Run Code。在弹出的 GTKWave 窗口中,展开 counter_tb...
4. 格雷码计数器(Gray Code Counter) 灰码计数器用于在跨时钟域数据传输时同步状态,尤其是用于 FIFO 中同步读写指针。灰码计数器的特点是相邻两个值只差一个比特位,减少了亚稳态问题。 优点: 有效减少亚稳态引起的错误。 适用于跨时钟域的数据同步和状态同步。 灰码计数器示例: module gray_counter ( input...
counter c1(.out(out), .clk(clk), .enable(enable), .reset(reset)); initial begin enable = 1; end initial begin clk = 0; forever #10 clk = ~clk; end initial begin reset = 1; #15 reset = 0; #1000 $finish; end initial
//设计四位格雷码计数器modulecounter_gray(input clk,input rst_n,output reg[3:0]cnt_gray,output reg[3:0]cnt_bin);//自然二进制计数器reg[3:0]cnt_bin_r;always@(posedge clk or negedge rst_n)beginif(!rst_n)begin cnt_bin_r<=0;endelsebegin ...
以上述代码为例,如:modulecounter(//端口定义inputreset_n,//复位端,低电平有效,让计数器清零input...
counter #(.N(2)) u0 ( .clk(clk), .rstn(rstn), .en(en)); endmodule 1. 2. 3. 4. 5. 6. 7. 8. 9. 请看,默认参数是用来实现计数器的,其中N等于2使其成为2位计数器,DOWN等于0使其成为递增计数器。计数器的输出在顶层不连接。