module clk(int_clk,ext_pulse,reset,pos_count,neg_count);
input int_clk;
input ext_pulse;
input reset;
output reg [7:0] pos_count;
output reg [7:0] neg_count;
reg [7:0] count;
always@(posedge int_clk)
if(reset)
begin
pos_count<=0;
neg_count<=0;
end
else if(ext_pulse)
begin
neg_count<=neg_count+1;
pos_count<=0;
end
else
begin
pos_count<=pos_count+1;
neg_count<=0;
end
endmodule
答案 0 :(得分:1)
嘿,您还没有在always块中添加一个begin..end。此外,您使用了同步复位,通常不建议这样做。我对您的代码进行了一些更改。顺便问一下,您是否生成了比特流?
module clk(int_clk,ext_pulse,reset,pos_count,neg_count);
input int_clk;
input ext_pulse;
input reset;
output reg [7:0] pos_count;
output reg [7:0] neg_count;
reg [7:0] count; //This reg is unused
always@(posedge int_clk or posedge reset) //I am assuming you want active high reset
begin
if(reset)
begin
pos_count<=0;
neg_count<=0;
end
else if(ext_pulse)
begin
neg_count<=neg_count+1;
pos_count<=0;
end
else
begin
pos_count<=pos_count+1;
neg_count<=0;
end
end
endmodule