完成：实验三 第一题

homework3/src/test1.c

@@ -0,0 +1,28 @@
+// test1.c
+// 左向流水灯
+#include "homework3.h"
+
+unsigned char cnt = 0;
+
+void test1()
+{
+    ENLED = 0;
+    ADDR3 = 1;
+    ADDR2 = 1;
+    ADDR1 = 1;
+    ADDR0 = 0;
+
+    while (true) {
+        P2 = ~(0x80 >> cnt);
+        Delay(20000);
+        cnt++;
+        if (cnt >= 8) {
+            cnt = 0;
+        }
+    }
+}
+
+void main()
+{
+    test1();
+}