📄 1602.lst
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C51 COMPILER V7.06 1602 08/14/2008 10:10:41 PAGE 1
C51 COMPILER V7.06, COMPILATION OF MODULE 1602
OBJECT MODULE PLACED IN 1602.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE 1602.c BROWSE DEBUG OBJECTEXTEND
stmt level source
1 /*============================================================
2 使用1602液晶显示的实验例子 明浩 2004/2/27
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 #include <reg51.h>
21 #define uchar unsigned char
22 #define uint unsigned int
23 #define LCM_Data P1
24 #define Busy 0x80 //用于检测LCM状态字中的Busy标识
25 sbit LCM_RW = P2^1; //定义引脚
26 sbit LCM_RS = P2^0;
27 sbit LCM_E = P2^2;
28
29
30
31 void WriteDataLCM(unsigned char WDLCM);
32 void WriteCommandLCM(unsigned char WCLCM,BuysC);
33 unsigned char ReadDataLCM(void);
34 unsigned char ReadStatusLCM(void);
35 void LCMInit(void);
36 void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData);
37 void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData);
38 void delay(void);
39 void Delay5Ms(void);
40 void Delay400Ms(void);
41
42 unsigned char code cdle_net[] = {" www.cdle.net www.cumt.edu.cn"};
43
44
45 void main(void)
46 {
47 1 Delay400Ms(); //启动等待，等LCM讲入工作状态
48 1 LCMInit(); //LCM初始化
49 1
50 1 DisplayListChar(0, 0, cdle_net);
51 1 while(1);
52 1 }
53
54 //写数据
55 void WriteDataLCM(unsigned char WDLCM)
C51 COMPILER V7.06 1602 08/14/2008 10:10:41 PAGE 2
56 {
57 1 ReadStatusLCM(); //检测忙
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_Data = WDLCM;
63 1 LCM_E = 1;
64 1 delay();
65 1 LCM_E = 0;
66 1 }
67
68 //写指令
69 void WriteCommandLCM(uchar WCLCM,BuysC) //BuysC为0时忽略忙检测
70 {
71 1 if (BuysC) ReadStatusLCM(); //根据需要检测忙
72 1 LCM_RS = 0;
73 1 LCM_RW = 0;
74 1 LCM_E = 0;
75 1 LCM_E = 0;
76 1 LCM_Data = WCLCM;
77 1 LCM_E = 1;
78 1 delay();
79 1 LCM_E = 0;
80 1 }
81
82 //读数据
83 uchar ReadDataLCM(void)
84 {
85 1 uchar DATA;
86 1 LCM_RS = 1;
87 1 LCM_RW = 1;
88 1 LCM_E = 0;
89 1 LCM_E = 0;
90 1 LCM_E = 1;
91 1 DATA = LCM_Data;
92 1 delay();
93 1 LCM_E = 0;
94 1 return(DATA);
95 1 }
96
97 //读状态
98 uchar ReadStatusLCM(void)
99 {
100 1 LCM_Data = 0xFF;
101 1 LCM_RS = 0;
102 1 LCM_RW = 1;
103 1 LCM_E = 0;
104 1 LCM_E = 1;
105 1 while (LCM_Data & Busy); //检测忙信号
106 1 LCM_E = 0;
107 1 return(LCM_Data);
108 1 }
109
110 void LCMInit(void) //LCM初始化
111 {
112 1 LCM_Data = 0;
113 1 WriteCommandLCM(0x38,0); //三次显示模式设置，不检测忙信号
114 1 Delay5Ms();
115 1 WriteCommandLCM(0x38,0);
116 1 Delay5Ms();
117 1 WriteCommandLCM(0x38,0);
C51 COMPILER V7.06 1602 08/14/2008 10:10:41 PAGE 3
118 1 Delay5Ms();
119 1
120 1 WriteCommandLCM(0x38,1); //显示模式设置,开始要求每次检测忙信号
121 1 WriteCommandLCM(0x08,1); //关闭显示
122 1 WriteCommandLCM(0x01,1); //显示清屏
123 1 WriteCommandLCM(0x06,1); // 显示光标移动设置
124 1 WriteCommandLCM(0x0C,1); // 显示开及光标设置
125 1 }
126
127 //按指定位置显示一个字符
128 void DisplayOneChar(uchar X, uchar Y, uchar DData)
129 {
130 1 Y &= 0x1;
131 1 X &= 0xF; //限制X不能大于15，Y不能大于1
132 1 if (Y) X |= 0x40; //当要显示第二行时地址码+0x40;
133 1 X |= 0x80; //算出指令码
134 1 WriteCommandLCM(X, 0); //这里不检测忙信号，发送地址码
135 1 WriteDataLCM(DData);
136 1 }
137
138 //按指定位置显示一串字符
139 void DisplayListChar(uchar X, uchar Y, uchar code *DData)
140 {
141 1 unsigned char ListLength;
142 1
143 1 ListLength = 0;
144 1 Y &= 0x1;
145 1 X &= 0xF; //限制X不能大于15，Y不能大于1
146 1 while (DData[ListLength]<0x20) //若到达字串尾则退出
147 1 {
148 2 if (X <= 0xF) //X坐标应小于0xF
149 2 {
150 3 DisplayOneChar(X, Y, DData[ListLength]); //显示单个字符
151 3 ListLength++;
152 3 X++;
153 3 }
154 2 else if (X == 0X10)
155 2 {
156 3 Y = 1;
157 3 X = 0;
158 3 }
159 2
160 2 }
161 1 }
162
163 void delay(void)
164 {
165 1 uchar i;
166 1 i++;
167 1 }
168
169 //5ms延时
170 void Delay5Ms(void)
171 {
172 1 unsigned int TempCyc = 5552;
173 1 while(TempCyc--);
174 1 }
175
176 //400ms延时
177 void Delay400Ms(void)
178 {
179 1 unsigned char TempCycA = 5;
C51 COMPILER V7.06 1602 08/14/2008 10:10:41 PAGE 4
180 1 unsigned int TempCycB;
181 1 while(TempCycA--)
182 1 {
183 2 TempCycB=7269;
184 2 while(TempCycB--);
185 2 };
186 1 }
187
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 328 ----
CONSTANT SIZE = 31 ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = ---- 10
IDATA SIZE = ---- ----
BIT SIZE = ---- ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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