From 1b64a5df5bd161306bde1679cb059580f3c0e323 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=BE=A1=E5=9D=82=E3=82=B9=E3=83=90=E3=83=AB?=
 <gugugulaocuchen@gmail.com>
Date: Sat, 24 May 2025 23:29:42 +0800
Subject: [PATCH] archieve: homework7 test1

---
 homework7/src/homework7.h | 17 +++++++++--------
 homework7/src/test1.c     | 22 ++++++++++++++++++++++
 2 files changed, 31 insertions(+), 8 deletions(-)
 create mode 100644 homework7/src/test1.c

diff --git a/homework7/src/homework7.h b/homework7/src/homework7.h
index 4c3b54b..f4a2ebe 100644
--- a/homework7/src/homework7.h
+++ b/homework7/src/homework7.h
@@ -31,23 +31,24 @@ sbit DB_7 = P2 ^ 7;
 // 2. pin number for 74HC138's address pins & enable pin
 //  2.1. sbit ADDR0 ~ sbit ADDR2: pin number for 74HC138's address pins
 sbit ADDR0 = P1 ^ 0; // @var ADDR0: to A(A0)
-sbit ADDR1 = P2 ^ 1; // @var ADDR1: to B(A1)
-sbit ADDR2 = P2 ^ 2; // @var ADDR2: to C(A2)
+sbit ADDR1 = P1 ^ 1; // @var ADDR1: to B(A1)
+sbit ADDR2 = P1 ^ 2; // @var ADDR2: to C(A2)
 // 2.2. sbit ADDR3 & sbit ENLED: pin number for 74HC138's enable pin
-sbit ADDR3 = P2 ^ 3; // @var ADDR3: to E1
-sbit ENLED = P2 ^ 4; // @var ENLED: to E2 & E3
+sbit ADDR3 = P1 ^ 3; // @var ADDR3: to E2
+sbit ENLED = P1 ^ 4; // @var ENLED: to E3
 
 // functions:
 // 1. void switch_138(unsigned char n): switch the 74HC138's address to n
 void switch_138(unsigned char n)
 {
+    bit A0, A1, A2;
     // @subsection: enable the 74HC138
     ENLED = 0;
-    ADDR3 = 1;
+    ADDR3 = 0;
     // @subsection: turn n to 3 bit binary number
-    bit A0 = n & 0x01;
-    bit A1 = (n >> 1) & 0x01;
-    bit A2 = (n >> 2) & 0x01;
+    A0 = n & 0x01;
+    A1 = (n >> 1) & 0x01;
+    A2 = (n >> 2) & 0x01;
     // @subsection: switch the 74HC138's address to n
     ADDR0 = A0;
     ADDR1 = A1;
diff --git a/homework7/src/test1.c b/homework7/src/test1.c
new file mode 100644
index 0000000..78fe522
--- /dev/null
+++ b/homework7/src/test1.c
@@ -0,0 +1,22 @@
+/*
+ * @name: test1.c
+ * @author: msksbr
+ * @date: 2025-05-24
+ * @description: a test for homework7's homework tests
+ * @version: 1.0
+ * homework zh_CN: 点亮点阵左上角的那个LED小灯
+ * homework EN: point the left top LED of the led matrix
+ */
+
+#include "homework7.h"
+
+void test1()
+{
+    switch_138(0); // switch the 74HC138's address to 0
+    DB_0 = 0;      // turn on the led matrix's left top LED
+}
+
+void main()
+{
+    test1();
+}
\ No newline at end of file