irq.asm

由SPCE061A控制SPLC501液晶的贪吃蛇游戏,很有意思

//.public _FIQ
.public _BREAK,_IRQ0, _IRQ1, _IRQ2, _IRQ3, _IRQ6, _IRQ7

//..................................................
.include 	hardware.inc;

.TEXT
//_FIQ:
//		push R1,R4 to [SP]
//		r1 = 0x2000
//		test	r1,[P_INT_Ctrl]
//		jnz		L_FIQ_TimerA
//		r1 = 0x0800
//		test	r1,[P_INT_Ctrl]
//		jnz		L_FIQ_TimerB
//L_FIQ_PWM:
//		r1 = C_FIQ_PWM
//		[P_INT_Clear] = r1	
//		pop	R1,R4 from [SP];
//		reti;
//L_FIQ_TimerA:
//		[P_INT_Clear] = r1
//		pop	R1,R4 from [SP];
//		reti;
//L_FIQ_TimerB:
//		[P_INT_Clear] = r1
//		pop	R1,R4 from [SP];
//		reti;
_BREAK: 
		push r1,r4 to [sp];		
		pop r1,r4 from [sp];
        reti;  

_IRQ0:
		push r1,r4 to [sp];		
		pop r1,r4 from [sp];
        reti;  
_IRQ1: 
		push r1,r4 to [sp];		
		pop r1,r4 from [sp];
        reti;  
_IRQ2: 
		push r1,r4 to [sp];		
		pop r1,r4 from [sp];
        reti;  
_IRQ3: 
		push r1,r4 to [sp];
		r1 = 0x0100;
		test r1,[P_INT_Ctrl];
		jnz	L_IRQ3_Ext1;
		r1 = 0x0200;
		test r1,[P_INT_Ctrl];
		jnz	L_IRQ3_Ext2;
	    [P_INT_Clear] = R1;
		pop	R1,R4 from [SP];
		reti;
	
L_IRQ3_Ext2:
 	    [P_INT_Clear] = R1;	
		pop	R1,R4 from [SP];
		reti;
	
L_IRQ3_Ext1:
	    [P_INT_Clear] = R1;
		pop	R1,R4 from [SP];
		reti;				
//_IRQ4:        
//		push r1,r4 to [sp];
//		r1 = C_IRQ4_1KHz;
//		[P_INT_Clear] = r1;
//		pop r1,r4 from [sp];
  //      reti;  
        
//_IRQ5:        
//		push r1,r4 to [sp];
//		r1 = 0x0008;
//		test r1,[P_INT_Ctrl];
//		jnz	L_IRQ5_4Hz;
//		r1 = 0x0004;
 //	    [P_INT_Clear] = R1;
//	/	pop	R1,R4 from [SP];
//		reti;

//L_IRQ5_4Hz:
//	    [P_INT_Clear] = R1;
//		pop	R1,R4 from [SP];
//		reti;

_IRQ6: 
		push r1,r4 to [sp];		
		pop r1,r4 from [sp];
        reti;  

_IRQ7:
		push r1,r4 to [sp];		
		pop r1,r4 from [sp];
        reti;