?? ps2key.lst
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C51 COMPILER V7.01 PS2KEY 03/05/2004 01:41:43 PAGE 1
C51 COMPILER V7.01, COMPILATION OF MODULE PS2KEY
OBJECT MODULE PLACED IN PS2Key.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE PS2Key.c BROWSE DEBUG OBJECTEXTEND
stmt level source
1 /*============================================================
2 使用1602液晶顯示和PS/2鍵盤的示例 明浩 2004/2
3 ==============================================================
4
5 SMC1602A(16*2)模擬口線接線方式
6 連接線圖:
7 ---------------------------------------------------
8 |LCM-----51 | LCM-----51 | LCM------51 |
9 --------------------------------------------------|
10 |DB0-----P1.0 | DB4-----P1.4 | RW-------P2.0 |
11 |DB1-----P1.1 | DB5-----P1.5 | RS-------P2.1 |
12 |DB2-----P1.2 | DB6-----P1.6 | E--------P2.2 |
13 |DB3-----P1.3 | DB7-----P1.7 | VLCD接1K電阻到GND|
14 ---------------------------------------------------
15
16 Keyboard接線
17 PS/2--------51
18 1 DATA------P3.4
19 3 GND
20 4 VCC
21 5 CLK-------P3.3 接在51的外部中斷，觸發方式為低電平
22
23
24 [注:AT89S51使用12M或11.0592M晶振,實測使用11.0592M]
25 [Keil uV2 7.01編譯運行通過 程序中沒有做鍵盤數據的奇偶校驗]
26
27 =============================================================*/
28 #include <at89x51.h>
29 #include "scancodes.h"
30
31 #define LCM_RW P2_0 //定義LCD引腳
32 #define LCM_RS P2_1
33 #define LCM_E P2_2
34 #define LCM_Data P1
35
36 #define Key_Data P3_4 //定義Keyboard引腳
37 #define Key_CLK P3_3
38
39 #define Busy 0x80 //用于檢測LCM狀態字中的Busy標識
40
41 void LCMInit(void);
42 void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData);
43 void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData);
44 void Delay5Ms(void);
45 void Delay400Ms(void);
46 void Decode(unsigned char ScanCode);
47 void WriteDataLCM(unsigned char WDLCM);
48 void WriteCommandLCM(unsigned char WCLCM,BuysC);
49
50 unsigned char ReadDataLCM(void);
51 unsigned char ReadStatusLCM(void);
52 unsigned char code cdle_net[] = {"--www.cdle.net--"};
53 unsigned char code email[] = {"pnzwzw@cdle.net"};
54 unsigned char code Cls[] = {" "};
55 static unsigned char IntNum = 0; //中斷次數計數
C51 COMPILER V7.01 PS2KEY 03/05/2004 01:41:43 PAGE 2
56 static unsigned char KeyV; //鍵值
57 static unsigned char DisNum = 0; //顯示用指針
58 static unsigned char Key_UP=0, Shift = 0;//Key_UP是鍵松開標識，Shift是Shift鍵按下標識
59 static unsigned char BF = 0; //標識是否有字符被收到
60
61 void main(void)
62 {
63 1 unsigned char TempCyc;
64 1
65 1 Delay400Ms(); //啟動等待，等LCM講入工作狀態
66 1 LCMInit(); //LCM初始化
67 1 Delay5Ms(); //延時片刻(可不要)
68 1
69 1 DisplayListChar(0, 0, cdle_net);
70 1 DisplayListChar(0, 1, email);
71 1 ReadDataLCM();//測試用句無意義
72 1 for (TempCyc=0; TempCyc<10; TempCyc++)
73 1 Delay400Ms(); //延時
74 1 DisplayListChar(0, 1, Cls);
75 1
76 1 IT1 = 0; //設外部中斷1為低電平觸發
77 1 EA = 1;
78 1 EX1 = 1; //開中斷
79 1
80 1 do
81 1 {
82 2 if (BF)
83 2 Decode(KeyV);
84 2 else
85 2 EA = 1; //開中斷
86 2 }
87 1 while(1);
88 1 }
89
90 //寫數據
91 void WriteDataLCM(unsigned char WDLCM)
92 {
93 1 ReadStatusLCM(); //檢測忙
94 1 LCM_Data = WDLCM;
95 1 LCM_RS = 1;
96 1 LCM_RW = 0;
97 1 LCM_E = 0; //若晶振速度太高可以在這后加小的延時
98 1 LCM_E = 0; //延時
99 1 LCM_E = 1;
100 1 }
101
102 //寫指令
103 void WriteCommandLCM(unsigned char WCLCM,BuysC) //BuysC為0時忽略忙檢測
104 {
105 1 if (BuysC) ReadStatusLCM(); //根據需要檢測忙
106 1 LCM_Data = WCLCM;
107 1 LCM_RS = 0;
108 1 LCM_RW = 0;
109 1 LCM_E = 0;
110 1 LCM_E = 0;
111 1 LCM_E = 1;
112 1 }
113
114 //讀數據
115 unsigned char ReadDataLCM(void)
116 {
117 1 LCM_RS = 1;
C51 COMPILER V7.01 PS2KEY 03/05/2004 01:41:43 PAGE 3
118 1 LCM_RW = 1;
119 1 LCM_E = 0;
120 1 LCM_E = 0;
121 1 LCM_E = 1;
122 1 return(LCM_Data);
123 1 }
124
125 //讀狀態
126 unsigned char ReadStatusLCM(void)
127 {
128 1 LCM_Data = 0xFF;
129 1 LCM_RS = 0;
130 1 LCM_RW = 1;
131 1 LCM_E = 0;
132 1 LCM_E = 0;
133 1 LCM_E = 1;
134 1 while (LCM_Data & Busy); //檢測忙信號
135 1 return(LCM_Data);
136 1 }
137
138 void LCMInit(void) //LCM初始化
139 {
140 1 LCM_Data = 0;
141 1 WriteCommandLCM(0x38,0); //三次顯示模式設置，不檢測忙信號
142 1 Delay5Ms();
143 1 WriteCommandLCM(0x38,0);
144 1 Delay5Ms();
145 1 WriteCommandLCM(0x38,0);
146 1 Delay5Ms();
147 1
148 1 WriteCommandLCM(0x38,1); //顯示模式設置,開始要求每次檢測忙信號
149 1 WriteCommandLCM(0x08,1); //關閉顯示
150 1 WriteCommandLCM(0x01,1); //顯示清屏
151 1 WriteCommandLCM(0x06,1); // 顯示光標移動設置
152 1 WriteCommandLCM(0x0F,1); // 顯示開及光標設置
153 1 }
154
155 //按指定位置顯示一個字符
156 void DisplayOneChar(unsigned char X, unsigned char Y, unsigned char DData)
157 {
158 1 Y &= 0x1;
159 1 X &= 0xF; //限制X不能大于15，Y不能大于1
160 1 if (Y) X |= 0x40; //當要顯示第二行時地址碼+0x40;
161 1 X |= 0x80; //算出指令碼
162 1 WriteCommandLCM(X, 1); //發命令字
163 1 WriteDataLCM(DData); //發數據
164 1 }
165
166 //按指定位置顯示一串字符
167 void DisplayListChar(unsigned char X, unsigned char Y, unsigned char code *DData)
168 {
169 1 unsigned char ListLength;
170 1
171 1 ListLength = 0;
172 1 Y &= 0x1;
173 1 X &= 0xF; //限制X不能大于15，Y不能大于1
174 1 while (DData[ListLength]>0x19) //若到達字串尾則退出
175 1 {
176 2 if (X <= 0xF) //X坐標應小于0xF
177 2 {
178 3 DisplayOneChar(X, Y, DData[ListLength]); //顯示單個字符
179 3 ListLength++;
C51 COMPILER V7.01 PS2KEY 03/05/2004 01:41:43 PAGE 4
180 3 X++;
181 3 }
182 2 }
183 1 }
184
185 //5ms延時
186 void Delay5Ms(void)
187 {
188 1 unsigned int TempCyc = 5552;
189 1 while(TempCyc--);
190 1 }
191
192 //400ms延時
193 void Delay400Ms(void)
194 {
195 1 unsigned char TempCycA = 5;
196 1 unsigned int TempCycB;
197 1 while(TempCycA--)
198 1 {
199 2 TempCycB=7269;
200 2 while(TempCycB--);
201 2 };
202 1 }
203
204 void Keyboard_out(void) interrupt 2
205 {
206 1 if ((IntNum > 0) && (IntNum < 9))
207 1 {
208 2 KeyV = KeyV >> 1; //因鍵盤數據是低>>高，結合上一句所以右移一位
209 2 if (Key_Data) KeyV = KeyV | 0x80; //當鍵盤數據線為1時為1到最高位
210 2 }
211 1 IntNum++;
212 1 while (!Key_CLK); //等待PS/2CLK拉高
213 1
214 1 if (IntNum > 10)
215 1 {
216 2 IntNum = 0; //當中斷10次后表示一幀數據收完，清變量準備下一次接收
217 2 BF = 1; //標識有字符輸入完了
218 2 EA = 0; //關中斷等顯示完后再開中斷 (注：如這里不用BF和關中斷直接調Decode()則所Decode中所調用的所有函數?? 快捷鍵說明
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