fiq.asm

spce061单片机的一些程序！C语言和汇编语言都有

//===================================================
//文件名称:FIQ.asm
//功能描述:输出波形
//完成日期:2003-6-12
//======================================================
.PUBLIC	 	_IRQ1,_IRQ2 


.INCLUDE 	hardware.inc          
.DEFINE		P_WatchDog_Clear	0x7012
.EXTERNAL  	_Out_Value
.EXTERNAL  	_MM
.EXTERNAL  	_Counter
.RAM 


.TEXT

///////////////////////////////////////////////////
//为输出三角波服务
///////////////////////////////////////////////////
_IRQ1:        
		push r1,r4 to [sp] 
		r1=0x0001
		[P_WatchDog_Clear]=r1
	  	r1=[_MM]
		JNZ High_To_Low  //下降沿
Low_To_High:             //上升沿
        r2=[_Out_Value]
        r2+=0x0200      //+8
        [_Out_Value]=r2
        
        JMP PutToDAC
        
High_To_Low:           //下降沿
		r2=[_Out_Value]
        r2-=0x0200      //+8
        [_Out_Value]=r2

PutToDAC:        
        r3=[_Counter]
        r3+=1
        [_Counter]=r3
       
	    [P_DAC1]=r2	
        [P_DAC2]=r2	
	
	    r1=0x1000
        [P_INT_Clear]=r1
        pop r1,r4 from [sp] 
        reti   


///////////////////////////////////////////////////
//为输出方波服务
///////////////////////////////////////////////////
_IRQ2:        
		push r1,r4 to [sp] 
		
        r3=[_Counter]
        r3+=1
        [_Counter]=r3
        
        r2=[_Out_Value]
	    [P_DAC1]=r2	
        [P_DAC2]=r2	
	
	    r1=0x0400
        [P_INT_Clear]=r1
        pop r1,r4 from [sp] 
        reti