isr.asm

周立功7289键盘显示模块源代码。包括51的源驱动程序和本人编写的61驱动程序。

.INCLUDE SPCE061A.INC
.EXTERNAL _key_value_process;
.CODE
//============================================================================================
//函数: Clear_WatchDog()
//语法：void Clear_WatchDog(void)
//描述：清看门狗
//参数：无
//返回：无
//============================================================================================
.PUBLIC _Clear_WatchDog;
_Clear_WatchDog:  .PROC
	r1 = 0x01;
 	[P_Watchdog_Clear] = r1;
 	retf
.ENDP
//============================================================================================
.PUBLIC _SP_INT_IRQ3;    	      
.PUBLIC F_SP_INT_IRQ3;    	      
_SP_INT_IRQ3:   .PROC
 F_SP_INT_IRQ3:
     r1 =  [P_INT_Ctrl_New];
	 r1 =  r1 |C_IRQ3_EXT1;     			         
	 [P_INT_Ctrl_New]= r1 
	 irq on;	 
     RETF;
.ENDP



//=============================================================================================
.TEXT
.PUBLIC _IRQ3
_IRQ3:
	push r1,r5 to [sp]
	r1 = C_IRQ3_EXT1
	test r1,[P_INT_Ctrl]
	jnz ?L_IRQ3_Ext1				//测试为EXT1中断则转向?L_IRQ3_Ext1
	r1 = C_IRQ3_EXT2
	test r1,[P_INT_Ctrl]
	jnz ?L_IRQ3_Ext2				//为EXT2中断则转向?L_IRQ3_Ext2
?L_IRQ3_Key:
	r1 = C_IRQ3_KEY
	[P_INT_Clear] = r1				//清中断标志位
	pop r1,r5 from [sp]
	reti
?L_IRQ3_Ext2:
	r1 = C_IRQ3_EXT2
	[P_INT_Clear] = r1              //清中断标志
	pop r1,r5 from [sp]
	reti
?L_IRQ3_Ext1:
    call _key_value_process;
	r1 = C_IRQ3_EXT1
	[P_INT_Clear] = r1              //清中断标志
	pop r1,r5 from [sp]
	reti