不能那么写。send_start比较长打一拍就行了reg send_start_d;always@(posedge CLK_SP) send_start_d <= send_start;这样上升沿可以写成if(send_start_d == 1'd0 && send_start == 1'd1)就是上一拍还是0这一拍是1我们就认为他是上升沿了
