📄 1602lizi.lst
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C51 COMPILER V7.02a 1602LIZI 05/19/2007 13:19:24 PAGE 1
C51 COMPILER V7.02a, COMPILATION OF MODULE 1602LIZI
OBJECT MODULE PLACED IN 1602lizi.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE 1602lizi.c BROWSE DEBUG OBJECTEXTEND
stmt level source
1 /*============================================================
2 使用1602液晶显示的实验例子
3 ==============================================================
4 SMC1602A(16*2)模拟口线接线方式
5 连接线图:
6 ---------------------------------------------------
7 |LCM-----51 | LCM-----51 | LCM------51 |
8 --------------------------------------------------|
9 |DB0-----P1.0 | DB4-----P1.4 | RW-------P2.0 |
10 |DB1-----P1.1 | DB5-----P1.5 | RS-------P2.1 |
11 |DB2-----P1.2 | DB6-----P1.6 | E--------P2.2 |
12 |DB3-----P1.3 | DB7-----P1.7 | VLCD接1K电阻到GND|
13 ---------------------------------------------------
14
15
16
17 [注:AT89S51使用12M晶振]
18 =============================================================*/
19
20 #define LCM_RW P1_1//定义引脚
21 #define LCM_RS P1_2
22 #define LCM_E P1_0
23 #define LCM_Data P0
24 #define Busy 0x80 //用于检测LCM状态字中的Busy标识
25
26 #include <at89x51.h>
27
28 void WriteDataLCM(unsigned char WDLCM);
29 void WriteCommandLCM(unsigned char WCLCM,BuysC);
30 unsigned char ReadDataLCM(void);
31 unsigned char ReadStatusLCM(void);
32 void LCMInit(void);
33 void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData);
34 void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData);
35 void Delay5Ms(void);
36 void Delay400Ms(void);
37
38 unsigned char code cdle_net[] = {"www.cdle.net"};
39 unsigned char code email[] = {"pnzwzw@cdle.net"};
40
41 void main(void)
42 {
43 1 Delay400Ms(); //启动等待，等LCM讲入工作状态
44 1 LCMInit(); //LCM初始化
45 1 Delay5Ms(); //延时片刻(可不要)
46 1
47 1 DisplayListChar(0, 0, cdle_net);
48 1 DisplayListChar(0, 1, email);
49 1 ReadDataLCM();//测试用句无意义
50 1 while(1);
51 1 }
52
53 //写数据
54 void WriteDataLCM(unsigned char WDLCM)
55 {
C51 COMPILER V7.02a 1602LIZI 05/19/2007 13:19:24 PAGE 2
56 1 ReadStatusLCM(); //检测忙
57 1 LCM_Data = WDLCM;
58 1 LCM_RS = 1;
59 1 LCM_RW = 0;
60 1 LCM_E = 0; //若晶振速度太高可以在这后加小的延时
61 1 LCM_E = 0; //延时
62 1 LCM_E = 1;
63 1 }
64
65 //写指令
66 void WriteCommandLCM(unsigned char WCLCM,BuysC) //BuysC为0时忽略忙检测
67 {
68 1 if (BuysC) ReadStatusLCM(); //根据需要检测忙
69 1 LCM_Data = WCLCM;
70 1 LCM_RS = 0;
71 1 LCM_RW = 0;
72 1 LCM_E = 0;
73 1 LCM_E = 0;
74 1 LCM_E = 1;
75 1 }
76
77 //读数据
78 unsigned char ReadDataLCM(void)
79 {
80 1 LCM_RS = 1;
81 1 LCM_RW = 1;
82 1 LCM_E = 0;
83 1 LCM_E = 0;
84 1 LCM_E = 1;
85 1 return(LCM_Data);
86 1 }
87
88 //读状态
89 unsigned char ReadStatusLCM(void)
90 {
91 1 LCM_Data = 0xFF;
92 1 LCM_RS = 0;
93 1 LCM_RW = 1;
94 1 LCM_E = 0;
95 1 LCM_E = 0;
96 1 LCM_E = 1;
97 1 while (LCM_Data & Busy); //检测忙信号
98 1 return(LCM_Data);
99 1 }
100
101 void LCMInit(void) //LCM初始化
102 {
103 1 LCM_Data = 0;
104 1 WriteCommandLCM(0x38,0); //三次显示模式设置，不检测忙信号
105 1 Delay5Ms();
106 1 WriteCommandLCM(0x38,0);
107 1 Delay5Ms();
108 1 WriteCommandLCM(0x38,0);
109 1 Delay5Ms();
110 1
111 1 WriteCommandLCM(0x38,1); //显示模式设置,开始要求每次检测忙信号
112 1 WriteCommandLCM(0x08,1); //关闭显示
113 1 WriteCommandLCM(0x01,1); //显示清屏
114 1 WriteCommandLCM(0x06,1); // 显示光标移动设置
115 1 WriteCommandLCM(0x0C,1); // 显示开及光标设置
116 1 }
117
C51 COMPILER V7.02a 1602LIZI 05/19/2007 13:19:24 PAGE 3
118 //按指定位置显示一个字符
119 void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)
120 {
121 1 Y &= 0x1;
122 1 X &= 0xF; //限制X不能大于15，Y不能大于1
123 1 if (Y) X |= 0x40; //当要显示第二行时地址码+0x40;
124 1 X |= 0x80; //算出指令码
125 1 WriteCommandLCM(X, 0); //这里不检测忙信号，发送地址码
126 1 WriteDataLCM(DData);
127 1 }
128
129 //按指定位置显示一串字符
130 void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData)
131 {
132 1 unsigned char ListLength;
133 1
134 1 ListLength = 0;
135 1 Y &= 0x1;
136 1 X &= 0xF; //限制X不能大于15，Y不能大于1
137 1 while (DData[ListLength]>0x20) //若到达字串尾则退出
138 1 {
139 2 if (X <= 0xF) //X坐标应小于0xF
140 2 {
141 3 DisplayOneChar(X, Y, DData[ListLength]); //显示单个字符
142 3 ListLength++;
143 3 X++;
144 3 }
145 2 }
146 1 }
147
148 //5ms延时
149 void Delay5Ms(void)
150 {
151 1 unsigned int TempCyc = 5552;
152 1 while(TempCyc--);
153 1 }
154
155 //400ms延时
156 void Delay400Ms(void)
157 {
158 1 unsigned char TempCycA = 5;
159 1 unsigned int TempCycB;
160 1 while(TempCycA--)
161 1 {
162 2 TempCycB=7269;
163 2 while(TempCycB--);
164 2 };
165 1 }
166
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 312 ----
CONSTANT SIZE = 29 ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = ---- 8
IDATA SIZE = ---- ----
BIT SIZE = ---- ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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