?? main_ex3.lst
字號:
C51 COMPILER V8.02 MAIN_EX3 01/05/2007 12:17:30 PAGE 1
C51 COMPILER V8.02, COMPILATION OF MODULE MAIN_EX3
OBJECT MODULE PLACED IN main_ex3.OBJ
COMPILER INVOKED BY: C:\Keil\C51\BIN\C51.EXE main_ex3.c BROWSE DEBUG OBJECTEXTEND
line level source
1 // P3口外接的鍵盤控制P1外接的LED顯示
2 #include <REGX51.H>
3 #define LEDCOM P2_4 //LED公共端
4 #define LEDZXM P0 //LED的顯示控制端
5
6 #define KEY1 P2_4 //按鍵輸入端
7 #define KEY2 P2_5 //按鍵輸入端
8 #define KEY3 P2_6 //按鍵輸入端
9 #define KEY4 P2_7 //按鍵輸入端
10
11 extern void delay(unsigned int i);
12
13 ex3( ) // C語言的主函數
14 {
15 1 unsigned char LED,tmp;
16 1 LED = 0xff; // 關LED顯示
17 1 while(1){
18 2 P2 |=0xf0; //選通鍵盤輸入端
19 2 tmp = (P2>>4);
20 2 P2 = 0x00;
21 2 if(tmp != 0x0f) LED = tmp | 0xf0;
22 2 LEDCOM =1;
23 2 LEDZXM = LED; // 鍵盤狀態送LED顯示
24 2 delay(100);
25 2 }
26 1 }
MODULE INFORMATION: STATIC OVERLAYABLE
CODE SIZE = 39 ----
CONSTANT SIZE = ---- ----
XDATA SIZE = ---- ----
PDATA SIZE = ---- ----
DATA SIZE = ---- 1
IDATA SIZE = ---- ----
BIT SIZE = ---- ----
END OF MODULE INFORMATION.
C51 COMPILATION COMPLETE. 0 WARNING(S), 0 ERROR(S)
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