From d374da4d977451f0784e4e00c722624339380ee3 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=98=B3=E5=85=89=E5=B0=91=E5=B9=B4?= <849317537@qq.com>
Date: Wed, 15 May 2024 10:25:45 +0800
Subject: [PATCH] =?UTF-8?q?=E6=B7=BB=E5=8A=A0=E4=B8=80=E4=B8=8B=E6=B3=A8?=
 =?UTF-8?q?=E9=87=8A?=
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---
 led_matrix/tb_lm_2.v | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/led_matrix/tb_lm_2.v b/led_matrix/tb_lm_2.v
index cd711c6..05cf7b0 100644
--- a/led_matrix/tb_lm_2.v
+++ b/led_matrix/tb_lm_2.v
@@ -97,7 +97,7 @@ always @(posedge sys_clk or negedge sys_rst) begin
     end
 end
 
-
+// 异步信号, 通过比较上次时钟周期的状态和当前时钟周期的状态得到当前是否按下了
 always @(posedge sys_clk or negedge sys_rst) begin
     if (sys_rst == 1'b0) begin
         key <= 1'b0;