lcd demo.lst
来自「基于89s51的OLCM1602测试程序」· LST 代码 · 共 224 行
LST
224 行
C51 COMPILER V7.50 LCD_DEMO 04/13/2003 17:04:22 PAGE 1
C51 COMPILER V7.50, COMPILATION OF MODULE LCD_DEMO
OBJECT MODULE PLACED IN lcd demo.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE lcd demo.c BROWSE DEBUG OBJECTEXTEND
line level source
1 /*============================================================
2 使用1602液晶显示的实验例子 明浩 2004/2/27
3 ==============================================================
4
5
6 SMC1602A(16*2)模拟口线接线方式
7 连接线图:
8 ---------------------------------------------------
9 |LCM-----51 | LCM-----51 | LCM------51 |
10 --------------------------------------------------|
11 |DB0-----P1.0 | DB4-----P1.4 | RW-------P2.0 |
12 |DB1-----P1.1 | DB5-----P1.5 | RS-------P2.1 |
13 |DB2-----P1.2 | DB6-----P1.6 | E--------P2.2 |
14 |DB3-----P1.3 | DB7-----P1.7 | VLCD接1K电阻到GND|
15 ---------------------------------------------------
16
17
18
19
20 [注:AT89S51使用12M晶振]
21 =============================================================*/
22
23
24 #define LCM_RW P1_1 //定义引脚
25 #define LCM_RS P1_0
26 #define LCM_E P1_2
27 #define LCM_Data P3
28 #define Busy 0x80 //用于检测LCM状态字中的Busy标识
29
30
31 #include <regx52.h>
32
33
34 void WriteDataLCM(unsigned char WDLCM);
35 void WriteCommandLCM(unsigned char WCLCM,BuysC);
36 unsigned char ReadDataLCM(void);
37 unsigned char ReadStatusLCM(void);
38 void LCMInit(void);
39 void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData);
40 void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData);
41 void Delay5Ms(void);
42 void Delay400Ms(void);
43
44
45 unsigned char code cdle_net[] = {"www.cdle.net"};
46 unsigned char code email[] = {"pnzwzw@cdle.net"};
47
48
49 void main(void)
50 {
51 1 P1=0xff;
52 1 P3=0xff;
53 1 Delay400Ms(); //启动等待，等LCM讲入工作状态
54 1 LCMInit(); //LCM初始化
55 1 Delay5Ms(); //延时片刻(可不要)
C51 COMPILER V7.50 LCD_DEMO 04/13/2003 17:04:22 PAGE 2
56 1
57 1
58 1 DisplayListChar(0, 0, cdle_net);
59 1 DisplayListChar(0, 1, email);
60 1 ReadDataLCM();//测试用句无意义
61 1 while(1);
62 1 }
63
64
65 //写数据
66 void WriteDataLCM(unsigned char WDLCM)
67 {
68 1 ReadStatusLCM(); //检测忙
69 1 LCM_Data = WDLCM;
70 1 LCM_RS = 1;
71 1 LCM_RW = 0;
72 1 LCM_E = 0; //若晶振速度太高可以在这后加小的延时
73 1 LCM_E = 0;
74 1 LCM_E = 0; //延时
75 1 LCM_E = 1;
76 1 LCM_E = 1;
77 1 LCM_E = 0;
78 1 }
79
80
81 //写指令
82 void WriteCommandLCM(unsigned char WCLCM,BuysC) //BuysC为0时忽略忙检测
83 {
84 1 if (BuysC) ReadStatusLCM(); //根据需要检测忙
85 1 LCM_Data = WCLCM;
86 1 LCM_RS = 0;
87 1 LCM_RW = 0;
88 1 LCM_E = 0;
89 1 LCM_E = 0;
90 1 LCM_E = 1;
91 1 LCM_E = 1;
92 1 LCM_E = 0;
93 1 }
94
95
96 //读数据
97 unsigned char ReadDataLCM(void)
98 {
99 1 LCM_RS = 1;
100 1 LCM_RW = 1;
101 1 LCM_E = 0;
102 1 LCM_E = 0;
103 1 LCM_E = 1;
104 1 return(LCM_Data);
105 1 }
106
107
108 //读状态
109 unsigned char ReadStatusLCM(void)
110 {
111 1 LCM_Data = 0xFF;
112 1 LCM_RS = 0;
113 1 LCM_RW = 1;
114 1 LCM_E = 0;
115 1 LCM_E = 0;
116 1 LCM_E = 1;
117 1
C51 COMPILER V7.50 LCD_DEMO 04/13/2003 17:04:22 PAGE 3
118 1 while (LCM_Data & Busy); //检测忙信号
119 1 //Delay5Ms();
120 1 return(LCM_Data);
121 1 }
122
123
124 void LCMInit(void) //LCM初始化
125 {
126 1 LCM_Data = 0;
127 1 WriteCommandLCM(0x38,0); //三次显示模式设置，不检测忙信号
128 1 Delay5Ms();
129 1 WriteCommandLCM(0x38,0);
130 1 Delay5Ms();
131 1 WriteCommandLCM(0x38,0);
132 1 Delay5Ms();
133 1
134 1
135 1 WriteCommandLCM(0x38,1); //显示模式设置,开始要求每次检测忙信号
136 1 WriteCommandLCM(0x08,1); //关闭显示
137 1 WriteCommandLCM(0x01,1); //显示清屏
138 1 WriteCommandLCM(0x06,1); // 显示光标移动设置
139 1 WriteCommandLCM(0x0f,1); // 显示开及光标设置
140 1 }
141
142
143 //按指定位置显示一个字符
144 void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)
145 {
146 1 Y &= 0x1;
147 1 X &= 0xF; //限制X不能大于15，Y不能大于1
148 1 if (Y) X |= 0x40; //当要显示第二行时地址码+0x40;
149 1 X |= 0x80; //算出指令码
150 1 WriteCommandLCM(X, 0); //这里不检测忙信号，发送地址码
151 1 WriteDataLCM(DData);
152 1 }
153
154
155 //按指定位置显示一串字符
156 void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData)
157 {
158 1 unsigned char ListLength;
159 1
160 1
161 1 ListLength = 0;
162 1 Y &= 0x1;
163 1 X &= 0xF; //限制X不能大于15，Y不能大于1
164 1 while (DData[ListLength]>0x20) //若到达字串尾则退出
165 1 {
166 2 if (X <= 0xF) //X坐标应小于0xF
167 2 {
168 3 DisplayOneChar(X, Y, DData[ListLength]); //显示单个字符
169 3 ListLength++;
170 3 X++;
171 3 }
172 2 }
173 1 }
174
175
176 //5ms延时
177 void Delay5Ms(void)
178 {
179 1 unsigned int TempCyc = 5552;
C51 COMPILER V7.50 LCD_DEMO 04/13/2003 17:04:22 PAGE 4
180 1 while(TempCyc--);
181 1 }
182
183
184 //400ms延时
185 void Delay400Ms(void)
186 {
187 1 unsigned char TempCycA = 5;
188 1 unsigned int TempCycB;
189 1 while(TempCycA--)
190 1 {
191 2 TempCycB=7269;
192 2 while(TempCycB--);
193 2 };
194 1 }
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 328 ----
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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