lcd2.lst
来自「这是一段开始学单片机时写的LCD程序」· LST 代码 · 共 269 行
LST
269 行
C51 COMPILER V7.50 LCD2 07/24/2007 16:45:13 PAGE 1
C51 COMPILER V7.50, COMPILATION OF MODULE LCD2
OBJECT MODULE PLACED IN LCD2.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE LCD2.C BROWSE DEBUG OBJECTEXTEND
line level source
1 //****************************************
2 //该程序实现用液晶显示器LCD显示一篇英语作文
3 //作者:李锡坚
4 //完成时间:2007.07.24.16:43
5 //****************************************
6 #include<reg51.h> //包含常用头文件
7 #include<stdio.h>
8 #include<intrins.h>
9 #include<absacc.h>
10 #define uchar unsigned char //定义常用数据类型
11 int cnt;
12 void LCD_INIT(void); //LCD的初始化函数
13 void LCD_DISPLAY_STR(char *DATA);//在指定的位置显示字符串
14 void LCD_CLR(uchar y); //清除LCD指定的行
15 void LCD_SEND_COMMAND(uchar COMMAND); //向LCD发送命令
16 void LCD_SEND_DATA(uchar DATA); //向LCD发送数据
17 void LCD_WAIT(void); //检查LCD空闲
18 uchar LCD_GET_FLAG(void); //检查LCD状态
19 void DELAY(void); //延时
20 /*定义所要显示的数据*/
21 char code DISPLAY[]="It goes without saying that this picture aims at revealing a current problem: what ki
-nd of attitude we will choose when facing difficulties and challenges. In this drawing, a football-player is prepared to
- kick a ball towards the net, where a goal-keeper keeps guard. However, in the player’s mind appears a scene in which t
-he keeper becomes a giant covering the net completely, while the latter imagines that he turns out to be a dwarf standin
-g below the huge net. Obviously, both of them lack courage and confidence in front of challenges.These two players repre
-sent those who often choose to magnify their enemies and dangers, and lose their confidence to fight against them. As a
-result, what they can achieve in the end is nothing but failure. This sad situation can be best illustrated in the fact
-that some people lose their chance of success in the entrance examination for the MA program. When preparing for the exa
-m, they often feel depressed thinking that they are never well-prepared. In fact, they will soon realize that it is not
-as difficult as they thought before. In a word, they suffer from underestimating their abilities.In our life, what we ne
-ed most is self-insurance and a proper view of challenges before us. Therefore, we should bear in mind that our competit
-ors may not be as terrible as expected, and our painstaking efforts will pay off as long as we arm ourselves with courag
-e and confidence. Only in this way can we overcome any difficulties and challenges.";
22 /*定义LCD控制字*/
23 #define LCD_MODE 0x3C /* 接口数据8位，显示2行，字体为1号 */
24 #define LCD_NO_FLASH 0x0C /* 屏幕显示开,无光标 */
25 #define LCD_HIDE 0x08 /* 屏幕显示关 */
26 #define LCD_FLASH 0x0D /* 屏幕显示开，并打开闪烁光标 */
27 #define LCD_SHIFT 0x07 /* 模块数据输入为增量方式,显示内容移动 */
28 #define LCD_NO_SHIFT 0x06 /* 模块数据输入为增量方式,显示光标移动 */
29 #define LCD_SH 0x14 /* 移动光标及整体显示 */
30 #define LCD_LINE1 0x80 /*第一行DDRAM起始地址*/
31 #define LCD_LINE2 0xc0 /*第二行DDRAM起始地址*/
32 #define SEND_IN XBYTE[0xff00] /*定义LCD的实际地址*/
33 sbit LCD_RS=P3^4; //定义LCD的RS控制位
34 sbit LCD_RW=P3^5; //定义LCD的RW控制位
35 sbit LCD_DISPLAY_START=P1^0; //LCD开始显示的指示灯
36 int t=0; //中断计数
37 //*************************************************
38 //LCD显示字符串的主程序
39 //利用中断间隔循环显示
40 //
41 //*************************************************
42 main()
43 {
C51 COMPILER V7.50 LCD2 07/24/2007 16:45:13 PAGE 2
44 1 LCD_INIT(); //初始化LCD
45 1 do
46 1 {
47 2 LCD_DISPLAY_START=0; //开LCD显示的指示灯
48 2 DELAY();
49 2 LCD_DISPLAY_START=1; //灭LCD显示的指示灯
50 2 LCD_DISPLAY_STR(DISPLAY); //显示字符串
51 2 }while(1);
52 1 }
53 //*************************************************
54 //函数功能:LCD初始化
55 //输入变量:无
56 //输出变量:无
57 //调用模块:LCD_SEND_COMMAND(),LCD_CLR()
58 //*************************************************
59 void LCD_INIT(void)
60 {
61 1 LCD_SEND_COMMAND(LCD_MODE); //设置工作方式
62 1 LCD_SEND_COMMAND(LCD_NO_FLASH); //设置显示方式
63 1 LCD_SEND_COMMAND(LCD_NO_SHIFT); //设置光标画面滚动方式
64 1 LCD_SEND_COMMAND(LCD_SH); //设置输入方式
65 1 LCD_CLR(1); //清除LCD第一行
66 1 LCD_CLR(2); //清除LCD第二行
67 1 }
68 //*************************************************
69 //函数功能:清除LCD指定行
70 //输入变量:y
71 //输出变量:无
72 //调用模块:LCD_SEND_COMMAND(),LCD_SEND_DATA()
73 //*************************************************
74 void LCD_CLR(uchar y)
75 {
76 1 uchar i;
77 1 i=0;
78 1 if(y==1)
79 1 {
80 2 LCD_SEND_COMMAND(LCD_LINE1); //发送命令使LCD指向第一行
81 2 i=16;
82 2 }
83 1 if(y==2)
84 1 {
85 2 LCD_SEND_COMMAND(LCD_LINE2); //发送命令使LCD指向第二行
86 2 i=16;
87 2 }
88 1 if(i!=0)
89 1 {
90 2 do
91 2 {
92 3 LCD_SEND_DATA(' '); //让LCD的相应位置显示空格
93 3 }while(--i!=0);
94 2 }
95 1 }
96 //*************************************************
97 //函数功能:向LCD发送命令
98 //输入变量:COMMAND
99 //输出变量:无
100 //调用模块:LCD_WAIT()
101 //*************************************************
102 void LCD_SEND_COMMAND(uchar COMMAND)
103 {
104 1 LCD_WAIT(); //等待空闲
105 1 LCD_RS=0; //命令方式
C51 COMPILER V7.50 LCD2 07/24/2007 16:45:13 PAGE 3
106 1 LCD_RW=0; //写方式
107 1 SEND_IN=COMMAND;//写实际的命令到LCD
108 1 }
109 //*************************************************
110 //函数功能:向LCD发送数据
111 //输入变量:DATA
112 //输出变量:无
113 //调用模块:LCD_WAIT()
114 //*************************************************
115 void LCD_SEND_DATA(uchar DATA)
116 {
117 1 LCD_WAIT(); //等待空闲
118 1 LCD_RS=1; //数据方式
119 1 LCD_RW=0; //写方式
120 1 SEND_IN=DATA;//写实际的数据到LCD
121 1 }
122 //*************************************************
123 //函数功能:等待LCD空闲
124 //输入变量:无
125 //输出变量:无
126 //调用模块:LCD_GET_FLAG()
127 //*************************************************
128 void LCD_WAIT(void)
129 {
130 1 uchar i;
131 1 i=1000; //定义等待时间,可以防止由于LCD损坏而使程序死循环
132 1 do
133 1 {
134 2 if((LCD_GET_FLAG()&0x80)==0) //判断BF是否为0
135 2 {
136 3 break;
137 3 }
138 2 }while(--i!=0);
139 1
140 1 }
141 //*************************************************
142 //函数功能:检查LCD状态
143 //输入变量:无
144 //输出变量:LCD显示的当前状态
145 //调用模块:无
146 //*************************************************
147 uchar LCD_GET_FLAG(void)
148 {
149 1 LCD_RS=0;
150 1 LCD_RW=1;
151 1 return(SEND_IN);
152 1 }
153 //*************************************************
154 //函数功能:检查LCD状态
155 //输入变量:无
156 //输出变量:LCD显示的当前状态
157 //调用模块:无
158 //*************************************************
159 void LCD_DISPLAY_STR(char *DATA)
160 {
161 1 int x=1,y=1;
162 1 do
163 1 {
164 2 if(y==1)
165 2 {
166 3 LCD_CLR(1);
167 3 LCD_SEND_COMMAND(LCD_LINE1);//发送显示位置命令
C51 COMPILER V7.50 LCD2 07/24/2007 16:45:13 PAGE 4
168 3 for(;x<(17)&&*DATA!='\0';x++)
169 3 {
170 4 LCD_SEND_DATA(*DATA++); //发送数据
171 4 }
172 3 if(*DATA!='\0') //判断是否发送完毕
173 3 {
174 4 x=1;
175 4 y=2; //未完毕转到第二行显示
176 4 }
177 3 DELAY();
178 3 }
179 2 if(y==2)
180 2 {
181 3 LCD_CLR(2);
182 3 LCD_SEND_COMMAND(LCD_LINE2);
183 3 for(;x<(17)&&*DATA!='\0';x++)
184 3 {
185 4 LCD_SEND_DATA(*DATA++);
186 4 }
187 3 if(*DATA!='\0') //判断是否发送完毕
188 3 {
189 4 x=1;
190 4 y=1; //未完毕转到第一行显示
191 4 }
192 3 DELAY();
193 3 }
194 2 }while(*DATA!='\0');
195 1 }
196 //*************************************************
197 //函数功能:延时3秒
198 //输入变量:无
199 //输出变量:无
200 //调用模块:无
201 //*************************************************
202 void DELAY(void)
203 {
204 1 TMOD=0x02;
205 1 TH0=0x06;
206 1 TL0=0x06;
207 1 TR0=1;
208 1 ET0=1;
209 1 EA=1;
210 1 while(t!=8000); //延时2秒
211 1 TR0=0;
212 1 ET0=0;
213 1 EA=0;
214 1 t=0;
215 1 }
216 //*****************************************
217 //
218 //定时器0的溢出中断程序
219 //
220 //*****************************************
221 void timer0(void) interrupt 1 using 0
222 {
223 1 t++;
224 1
225 1 }
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 418 ----
C51 COMPILER V7.50 LCD2 07/24/2007 16:45:13 PAGE 5
CONSTANT SIZE = 1489 ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = 4 12
IDATA SIZE = ---- ----
BIT SIZE = ---- ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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