嵌入式之开关控制流水灯.doc

没按开关之前 按第一个开关LED1亮 按第二个开关LED2亮 按第三个开关LED3亮 按第四个按键开关LED4亮Key.c程序代码如下：#include key.h#include 2440addr.hvoid Key_Init(void)rGPFCON &= (3 0) | (3 2) | (3 4) | (3 8) ;rGPFCON |= KEY1 | KEY2 | KEY3 | KEY4 ;rGPFDAT |= (1 0) | (1 1) | (1 2) | (1 4) ;int Key_Scan(void)int keynum = 0 ;/rGPFDAT = 0XFFF ;if(rGPFDAT & (1 1) = 0 )keynum = 1 ;if(rGPFDAT & (1 4) = 0 )keynum = 2 ; if(rGPFDAT & (1 2) = 0 ) keynum = 3 ;if(rGPFDAT & (1 0) = 0 )keynum = 4 ; return keynum ;Key.h程序代码如下：#ifndef _KEY_H_#define _KEY_H_#define KEY1 (0 2) #define KEY2 (0 8)#define KEY3 (0 4)#define KEY4 (0 0)extern void Key_Init() ;extern int Key_Scan() ;#endifLedflow.c程序代码如下：#include ledflow.h#include 2440addr.hvoid Led_Init(void)rGPBCON &= (3 10) | (3 12) | (3 14) |(3 16);rGPBCON |= (110) | (112) | (114) | (116) ;rGPBUP &= (1 5) | (1 6) | (1 7) | (1 8) ) ;rGPBDAT |= (1 5) | (1 6) | (1 7) | (1 8) ;Ledflow.h程序代码如下：#ifndef _LEDFLOW_H_#define _LEDFLOW_H_#include 2440addr.h#define Led1_On() rGPBDAT &= (1 5); #define Led1_Off() rGPBDAT |= (1 5); #define Led2_On() rGPBDAT &= (1 6); #define Led2_Off() rGPBDAT |= (1 6); #define Led3_On() rGPBDAT &= (1 7); #define Led3_Off() rGPBDAT |= (1 7); #define Led4_On() rGPBDAT &= (1 8); #define Led4_Off() rGPBDAT |= (1 8); extern void Led_Init(void);#endifMain.c程序代码如下：#include key.h#include ledflow.hvoid Board_Init(void) Key_Init(); Led_Init();int Main() Board_Init(); while(1) switch(Key_Scan() case 1:Led1_On();break; case 2:Led2_On();break; case 3:Led3_On();break; case 4:Led4_On();break; default:break; return 0;蜂鸣器beep.c程序代码如下：#include beep.h#include 2440addr.hvoid Beep_Init(void)rGPBCON &= (3 0); rGPBCON |= 10;rGPBUP &= (1 0);rGPBDAT &= (1 0); beep,h程序代码如下;#ifndef _BEEP_H_#define _BEEP_H_#define Beep_On() rGPBDAT |= (1 0 ); #define Beep_Off() rGPBDAT &= (1 0); extern void Beep_Init(void);#endifCommon.c程序代码如下：#include common.hvoid Delay(void)int i;for (i=0;i1000000;i+);Common.h程序代码如下：#ifndef _COMMON_H_#define _COMMON_H_extern void Delay(void);#endif现在主程序中加入两个头文件依次是#include common.h#inclu