📄 lcd1602.lst
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C51 COMPILER V8.02 LCD1602 11/30/2006 16:41:31 PAGE 1
C51 COMPILER V8.02, COMPILATION OF MODULE LCD1602
OBJECT MODULE PLACED IN LCD1602.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE LCD1602.C BROWSE DEBUG OBJECTEXTEND
line level source
1 #include <reg51.h>
2 #include <intrins.h>
3 #include <absacc.h>
4
5 #define nop() _nop_()
6 #define LCM_Data P0
7 #define Busy 0x80 //用于检测LCM状态字中的Busy标识
8 sbit LCM_RW=P1^1; //定义LCD引脚
9 sbit LCM_RS=P1^0;
10 sbit LCM_E=P1^2;
11
12 unsigned char code m0[] = "CH451Test";
13
14 unsigned char code table[] = {0x03,0x03,0x00,0x00,0x00,0x00,0x00,0x00,/*.*/
15 0x08,0x0f,0x12,0x0f,0x0a,0x1f,0x02,0x02,/*年*/
16 0x0f,0x09,0x0f,0x09,0x0f,0x09,0x11,0x00,
17 0x0f,0x09,0x09,0x0f,0x09,0x09,0x0f,0x00,
18 0x04,0x07,0x04,0x07,0x05,0x0f,0x11,0x1f,
19 0x04,0x1c,0x04,0x1c,0x00,0x18,0x00,0x1f,
20 0x0a,0x1f,0x0a,0x0e,0x0a,0x1f,0x0a,0x12,
21 0x1e,0x12,0x1e,0x12,0x1e,0x12,0x12,0x12
22 };
23
24
25 //5ms延时
26 void Delay5Ms(void)
27 {
28 1 unsigned int TempCyc = 5552;
29 1 while(TempCyc--);
30 1 }
31
32 //400ms延时
33 void Delay200Ms(void)
34 {
35 1 unsigned char TempCycA = 4;
36 1 unsigned int TempCycB;
37 1 while(TempCycA--)
38 1 {
39 2 TempCycB=5000;
40 2 while(TempCycB--);
41 2 };
42 1 }
43 //读状态
44 unsigned char ReadStatusLCM(void)
45 {
46 1 LCM_Data=0xFF;
47 1 LCM_RS=0;
48 1 LCM_RW=1;
49 1 LCM_E=0;
50 1 LCM_E=0;
51 1 LCM_E=1;
52 1 while(LCM_Data & Busy); //检测忙信号
53 1 return(LCM_Data);
54 1 }
55
C51 COMPILER V8.02 LCD1602 11/30/2006 16:41:31 PAGE 2
56 //写数据
57 void WriteDataLCM(unsigned char WDLCM)
58 {
59 1 ReadStatusLCM(); //检测忙
60 1 LCM_Data=WDLCM;
61 1 LCM_RS=1;
62 1 LCM_RW=0;
63 1 LCM_E=0; //
64 1 LCM_E=0; //延时
65 1 LCM_E=1;
66 1 }
67
68 //写指令
69 void WriteCommandLCM(unsigned char WCLCM,BuysC) //BuysC为0时忽略忙检测
70 {
71 1 if (BuysC)
72 1 ReadStatusLCM(); //根据需要检测忙
73 1 LCM_Data = WCLCM;
74 1 LCM_RS = 0;
75 1 LCM_RW = 0;
76 1 LCM_E = 0;
77 1 LCM_E = 0;
78 1 LCM_E = 1;
79 1 }
80
81 //按指定位置显示一个字符
82 void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)
83 {
84 1 Y &= 0x1;
85 1 X &= 0xF; //限制X不能大于15，Y不能大于1
86 1 if (Y) X |= 0x40; //当要显示第二行时地址码+0x40;
87 1 X |= 0x80; //算出指令码
88 1 WriteCommandLCM(X, 1); //发命令字
89 1 WriteDataLCM(DData); //发数据
90 1 }
91
92 void LCMInit(void) //LCM初始化
93 {
94 1 LCM_Data=0;
95 1 WriteCommandLCM(0x38,0); //三次显示模式设置，不检测忙信号
96 1 Delay5Ms();
97 1 WriteCommandLCM(0x38,0);
98 1 Delay5Ms();
99 1 WriteCommandLCM(0x38,0);
100 1 Delay5Ms();
101 1
102 1 WriteCommandLCM(0x38,1); //显示模式设置,开始要求每次检测忙信号
103 1 WriteCommandLCM(0x08,1); //关闭显示
104 1 WriteCommandLCM(0x01,1); //显示清屏
105 1 WriteCommandLCM(0x06,1); // 显示光标移动设置
106 1 WriteCommandLCM(0x0C,1); // 显示开及光标设置
107 1 }
108
109
110 //按指定位置显示一串字符
111
112 void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData)
113 {
114 1 unsigned char ListLength;
115 1
116 1 ListLength = 0;
117 1 Y &= 0x1;
C51 COMPILER V8.02 LCD1602 11/30/2006 16:41:31 PAGE 3
118 1 X &= 0xF; //限制X不能大于15，Y不能大于1
119 1 while (DData[ListLength]>0x20) //若到达字串尾则退出
120 1 {
121 2 if (X <= 0xF) //X坐标应小于0xF
122 2 {
123 3 DisplayOneChar(X, Y, DData[ListLength]); //显示单个字符
124 3 ListLength++;
125 3 X++;
126 3 }
127 2 }
128 1 }
129
130
131 void writecgram(unsigned char i,unsigned char *zwdata)
132 {
133 1 unsigned char j;
134 1 WriteCommandLCM(0x40,1); //写LCM CGRAM的起始地址。
135 1 for(j=0;j<i;j++)
136 1 WriteDataLCM(*zwdata++);
137 1 }
138
139
140 void lcdinit()
141 {
142 1 unsigned char i;
143 1 Delay200Ms(); //启动等待，等LCM讲入工作状态
144 1 LCMInit(); //LCM初始化
145 1 writecgram(64,&table[0]);
146 1
147 1 for(i=0;i<16;i++)
148 1 {
149 2 DisplayOneChar(i, 0, ' ');
150 2 DisplayOneChar(i, 1, ' ');
151 2 }
152 1
153 1 DisplayListChar(0, 0, &m0[0]);
154 1 }
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 330 ----
CONSTANT SIZE = 74 ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = ---- 7
IDATA SIZE = ---- ----
BIT SIZE = ---- ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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