www.pudn.com > Sunplusvoice.rar > system.asm

.include resource.inc; 
.include hardware.inc; 
.include key.inc; 
 
//*********************************************************// 
//函数:System_Initial() 
//描述:键盘扫描初始化 
//参数:无 
//返回:无 
//*********************************************************// 
.CODE 
.public _System_Initial; 
.public	F_System_Initial; 
_System_Initial: .PROC 
F_System_Initial: 
  		//push	BP,BP to [SP];					 
  		//BP = SP + 1; 
		//r1 = [BP+3]; 
		//r2 = [BP+4]; 
		call	F_User_Init_IO;				// 调用键盘扫描 
		call	F_Key_Scan_Initial;			  
		// Add other general initialization here		 
		//r1 =0x0001;						 
		//pop		BP,BP from [SP];		 
		retf; 
	   .ENDP; 
//*********I/O初始化为下拉输入*****************************// 
//*********************************************************// 
F_User_Init_IO: 
		R1 = 0x0000; 
        [P_IOA_Dir] = R1;                    //A口为输入口 
        [P_IOA_Attrib] = R1;				  
        [P_IOA_Data] = R1;                   //下拉输入  
        R1 = 0x0000;                         
        retf;  
 
//*********************************************************// 
//函数:System_ServiceLoop() 
//描述:键盘去抖和键盘扫描 
//参数:无 
//返回:无 
//*********************************************************// 
.public _System_ServiceLoop; 
_System_ServiceLoop: .PROC                   
 
		call	F_Key_DebounceCnt_Down;		//键盘去抖 
		call    F_Key_Scan_ServiceLoop;		//键盘扫描		 
		R1=0x0001;                      	//  
		[P_Watchdog_Clear]=R1;       		// 
        retf; 
        .ENDP; 
//*********************************************************// 
//函数:Clear_WatchDog() 
//描述:看门狗清0 
//参数:无 
//返回:无 
//*********************************************************// 
.public _Clear_WatchDog; 
_Clear_WatchDog: 	.PROC 
		R1=0x0001;                      	 
		[P_Watchdog_Clear]=R1;       		 
		retf; 
		.ENDP