请帮我用Verilog设计一个计数器计数范围：271异步清零同步置位功能同步预置数功能计数使能功能加减计数功能当为加法计数器时,要有溢出进位当为减法计数器时,要有借位标志whenReset =0, out= 0…0Preset=0, out=11..1Load =1, out = inwhenCount
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你关于carry的描述和你的伪代码不一致啊.
module counter(
input clk, rst, prst, load, cnt_en, up_down,
input [8:0] in,
output reg [8:0] out,
output reg carry_out);
[email protected](posedge clk or negedge rst)
if(~rst) begin
carry_out