diff --git a/.gitignore b/.gitignore
index 76e541e..9fd75b1 100644
--- a/.gitignore
+++ b/.gitignore
@@ -11,6 +11,7 @@
 !*/MDK-ARM/startup_*.s
 !*.ioc
 !.mxproject
+!README.md
 !video/
 !video/*
 # !*.uvprojx
diff --git a/README.md b/README.md
index 7ad44e2..3440b7e 100644
--- a/README.md
+++ b/README.md
@@ -29,3 +29,12 @@
 
 ## 实验十——LCD
 <video controls src="video/exp10.mp4"></video>
+
+## 期末大作业
+连接后显示开机界面，矩阵LED滚动显示文字。
+<video controls src="video/final1.mp4"></video>
+
+可以通过矩阵键盘切换壁纸、设置时间。
+<video controls src="video/final2.mp4"></video>
+
+详细介绍可以查看[FinalHomework文件夹](FinalHomework/README.md)。
diff --git a/video/final1.mp4 b/video/final1.mp4
new file mode 100644
index 0000000..fce7fa5
--- /dev/null
+++ b/video/final1.mp4
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:150b6339d83f2cebe5d89335febbc81664b085ea380b117edc8a7700fa38e9b4
+size 3072908
diff --git a/video/final2.mp4 b/video/final2.mp4
new file mode 100644
index 0000000..8fe8b16
--- /dev/null
+++ b/video/final2.mp4
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:4bb9ba9b45b0f2ad44fcf654d64874439610f8014c2406c8fee58fdb3a5c3258
+size 6932192